Triazine derivative molecular catalyst as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of chemical production, and particularly relates to a triazine derivative molecular catalyst as well as a preparation method and application thereof. Comprising carbon paper and a triazine derivative molecular catalyst. The carbon paper has a porous structure. The triazine derivative molecular catalyst is arranged on the carbon paper. The preparation method of the triazine derivative molecular catalyst electrode comprises the following steps: sequentially carrying out ultrasonic treatment on carbon paper by using acetone and ethanol; the method comprises the following steps: ultrasonically dispersing triazine derivative molecules in ethanol, and adding a Nafion solution as an adhesive to obtain a triazine derivative molecule dispersion liquid; and atomizing and spraying the triazine derivative molecule dispersion liquid on the carbon paper. A triazine derivative molecular catalyst is used, so that the problem that a metal-based catalyst has toxicity is solved. The triazine derivative molecular catalyst electrode is adopted, the current density of glyoxylic acid prepared through electrocatalytic oxalic acid reduction is high, the Faraday efficiency and stability are equivalent to those of a mainstream metal catalyst, and the catalyst also has high target product selectivity.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of chemical production, and particularly relates to a triazine derivative molecular catalyst, a preparation method and application thereof. BACKGROUND

[0002] Oxalic acid electro-reduction technology is an electrochemical process that utilizes electrical energy to drive the reduction reaction of oxalic acid (ethanedioic acid) on the surface of an electrode. This technology is mainly carried out at normal temperature and pressure, and by adjusting the potential, electrolyte and electrode material (such as lead, mercury or a new type of catalyst), oxalic acid is converted into high-value-added products such as glyoxylic acid or ethylene glycol. Compared with the traditional catalytic hydrogenation process at high temperature and high pressure, the electro-reduction technology has the characteristics of mild reaction conditions, low energy consumption and no need for direct participation of hydrogen, which meets the requirements of green chemistry and low-carbon manufacturing. In recent years, with the development of renewable energy and electrochemical synthesis, this technology has attracted attention due to its potential in efficient conversion of carbon resources and decarburization of chemical processes, and has shown significant advantages in the fields of fine chemical production and carbon dioxide resource utilization.

[0003] However, most of the catalysts used in the preparation of glyoxylic acid by oxalic acid electro-reduction are metal-based, which will gradually etch and dissolve during the reaction. The presence of metal ions increases the difficulty of product separation and purification, and the residual metal ions in the product can be toxic to the product and downstream derivatives. Therefore, it is necessary to design a triazine derivative molecular catalyst, a preparation method and application thereof to solve the above problems. SUMMARY

[0004] In view of the above problems, the present application provides a triazine derivative molecular catalyst, a preparation method and application thereof to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a triazine derivative molecular catalyst electrode, comprising:

[0006] Carbon paper, the carbon paper has a porous structure;

[0007] Triazine derivative molecular catalyst, the triazine derivative molecular catalyst is arranged on the carbon paper.

[0008] Further, the loading amount of the triazine derivative molecule in the triazine derivative molecular catalyst is 0.5-1.0 mg / cm 2 .

[0009] The present application also provides a preparation method of a triazine derivative molecular catalyst electrode, comprising the following steps:

[0010] Step S1, sequentially ultrasonic treating the carbon paper in acetone and ethanol;

[0011] Step S2, ultrasonic dispersion of triazine derivative molecules in ethanol, and adding Nafion solution as adhesive to obtain triazine derivative molecule dispersion liquid;

[0012] Step S3, atomizing spray of the triazine derivative molecule dispersion liquid on the carbon paper.

[0013] Further, the step S1 further comprises: the treatment time of the acetone and the ethanol is 5 minutes / time.

[0014] Further, the step S2 further comprises: the ultrasonic dispersion time of the triazine derivative molecules in the ethanol is 20 minutes, the amount of the ethanol is 0.4-0.5 mL / mg, and the ratio of the Nafion solution to the triazine derivative molecules is 5-15 μL / mg.

[0015] Further, the atomizing device for atomizing spray of the triazine derivative molecule dispersion liquid comprises:

[0016] a box;

[0017] a vacuum adsorption platform in the box, above which the carbon paper is placed;

[0018] a platform driving cylinder connected with the box and drivingly connected with the vacuum adsorption platform, the platform driving cylinder being used to drive the vacuum adsorption platform to move in the transverse direction;

[0019] an atomizing spray head mechanism in the box, the atomizing spray head mechanism being used to inject the triazine derivative molecule dispersion liquid and spray the carbon paper;

[0020] a spray head driving mechanism used to drive the atomizing spray head mechanism to move in the longitudinal direction.

[0021] Further, the atomizing spray head mechanism comprises an atomizing spray head and a spray head rack, the spray head rack extending in the longitudinal direction, and the front end of the spray head rack being connected with the atomizing spray head;

[0022] the spray head driving mechanism comprising a liquid storage cylinder, a piston, a piston driving cylinder, a piston rack and a gear, the axial direction of the liquid storage cylinder being toward the longitudinal direction, the liquid storage cylinder being used to communicate with the spray head, the liquid storage cylinder being used to inject the triazine derivative molecule dispersion liquid, the piston being slidingly connected with the liquid storage cylinder in the longitudinal direction, the piston rack being connected with the piston, the piston driving cylinder being drivingly connected with the piston rack, and the gear being engaged with the spray head rack and the piston rack.

[0023] Further, the atomizing device further comprises a supporting seat and supporting pieces, the supporting seat is located in the box, the supporting pieces are provided with two, the two supporting pieces are connected with the upper end of the supporting seat, the spray head rack is connected with one of the supporting pieces in the longitudinal direction, and the piston rack is connected with the other supporting piece in the longitudinal direction.

[0024] Further, the atomizing device further comprises a clamp, a motor, a branch pipe and an electromagnetic valve, the clamp is connected with the inner wall of the box, the liquid storage cylinder is rotationally connected with the clamp, the motor is used for being connected with the clamp and being in transmission connection with the liquid storage cylinder.

[0025] The liquid storage cylinder is connected with the branch pipe, the branch pipe is communicated with the liquid storage cylinder, and the electromagnetic valve is arranged on the branch pipe.

[0026] The application further provides application of a triazine derivative molecular catalyst electrode in electrocatalytic reduction synthesis of glyoxylic acid.

[0027] Technical effects and advantages of the application:

[0028] 1. The triazine derivative molecular catalyst is used, and the problem of toxicity of a metal-based catalyst is overcome.

[0029] 2. The triazine derivative molecular catalyst electrode is used, the current density of electrocatalytic reduction of oxalic acid to prepare glyoxylic acid is high, the Faraday efficiency and stability are equivalent to mainstream metal catalysts, and the catalyst also has high target product selectivity.

[0030] Other features and advantages of the application will be described in the following description, and some will become apparent from the description, or will be understood by those skilled in the art from the description. The purpose and other advantages of the application can be achieved and obtained by the structure indicated in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0032] Figure 1 is a scanning electron microscope image of the triazine derivative molecular catalyst obtained in embodiment 1 of the application;

[0033] Figure 2 is a linear scan voltammogram of the triazine derivative molecular catalyst of embodiment 4 of the application;

[0034] Figure 3 This is a Faraday efficiency diagram of the triazine-derived molecular catalyst of Example 4 of the present invention for the reduction of oxalic acid to glyoxylic acid under different set current densities;

[0035] Figure 4 This is a yield graph of the reduction of oxalic acid to glyoxylic acid by the triazine-derived molecular catalyst in Example 4 of the present invention under different set current densities.

[0036] Figure 5 This is a partial current density diagram of the triazine-derived molecular catalyst used in Example 4 of the present invention for the reduction of oxalic acid to glyoxylic acid under different set current densities.

[0037] Figure 6 A schematic diagram of the atomizing device according to an embodiment of the present invention is shown;

[0038] Figure 7 A schematic diagram of the nozzle drive mechanism according to an embodiment of the present invention is shown.

[0039] Reference numerals in the attached drawings: 1. Box body; 2. Vacuum adsorption platform; 3. Platform drive cylinder; 4. Atomizing nozzle; 5. Nozzle rack; 6. Liquid storage tank; 7. Piston; 8. Piston drive cylinder; 9. Piston rack; 10. Gear; 11. Support base; 12. Support component; 13. Clamp; 14. Motor; 15. Branch pipe; 16. Solenoid valve; 17. Guide rail; 18. First connecting seat; 19. Connecting block; 20. Slide groove; 21. Second connecting seat. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] The positive X-axis points forward, and the negative X-axis points backward; the positive Y-axis points left, and the negative Y-axis points right; the positive Z-axis points upward, and the negative Z-axis points downward. The horizontal axis represents left and right directions, and the vertical axis represents front and back directions.

[0042] An embodiment of the present invention provides a triazine-derived molecular catalyst electrode, comprising carbon paper and a triazine-derived molecular catalyst. The carbon paper has a porous structure. The triazine-derived molecular catalyst is disposed on the carbon paper.

[0043] Specifically, the use of triazine-derived molecular catalysts overcomes the problem of toxicity associated with metal-based catalysts.

[0044] In this embodiment, the carbon paper is set as a carbon fiber substrate, and a triazine-derived molecular film is disposed on the substrate; the triazine-derived molecular film is preferably a 4,4',4”-(1,3,5-triazine-2,4,6-trimethyl)triphenylamine film.

[0045] Optionally, the triazine-derived molecule catalyst has a triazine-derived molecule loading of 0.5–1.0 mg / cm².

[0046] Another embodiment of the present invention provides a method for preparing a triazine-derived molecular catalyst electrode, comprising the following steps:

[0047] Step S1: Sonicate the carbon paper sequentially in acetone and ethanol.

[0048] Step S2: The triazine derivative molecules are ultrasonically dispersed in ethanol, and Nafion solution is added as a binder to obtain a triazine derivative molecule dispersion.

[0049] Step S3: The triazine-derived molecular dispersion is atomized and sprayed onto the carbon paper.

[0050] Specifically, the preparation method of triazine-derived molecular catalyst electrodes is simple, easy to achieve large-area preparation, and low in cost.

[0051] Optionally, step S1 further includes: the acetone and ethanol treatment time is 5 minutes per cycle.

[0052] Optionally, step S2 further includes: the ultrasonic dispersion time of the triazine derivative molecules in the ethanol is 20 minutes, the amount of ethanol is 0.4-0.5 mL / mg, and the ratio of the Nafion solution to the triazine derivative molecules is 5-15 μL / mg.

[0053] Specifically, Example 1

[0054] Hydrophilic carbon paper was sequentially sonicated in acetone and ethanol for 5 minutes each. 7.2 mg of triazine derivative molecules were dispersed in 3.6 mL of ethanol and then sonicated for 20 minutes to prepare a dispersion. A 5% (w / w) Nafion solution was then added as a binder at a concentration of 9 μL / mg of triazine derivative molecule catalyst. The mixture was further sonicated for 10 minutes to obtain a homogeneous suspension. The suspension was then atomized and sprayed onto carbon paper to obtain a triazine derivative molecule catalyst electrode.

[0055] The triazine-derived molecular catalyst electrode obtained in Example 1 was analyzed using scanning electron microscopy, and its scanning electron microscopy image is shown below. Figure 1 .

[0056] Example 2

[0057] The triazine derivative molecule obtained in Example 1 was atomized and sprayed onto carbon paper with a porous structure, with a surface loading of 0.8 mg / cm2.

[0058] Example 3

[0059] The test conditions for the electrocatalytic reduction of oxalic acid to glyoxylic acid using the triazine-derived molecular catalyst electrode obtained in Example 2 are as follows:

[0060] In the H-type cell system, a Nafion 115 membrane was used as the ion exchange membrane, and the triazine-derived molecular catalyst obtained in Example 2, the platinum wire electrode, and the silver / silver chloride electrode were used as the working electrode, counter electrode, and reference electrode, respectively. 1 mol / L oxalic acid was used as the electrolyte at the cathode, and 0.5 mol / L H₂SO₄ was used at the anode.

[0061] Example 4

[0062] Product performance testing of triazine-derived molecular catalyst electrode in the electrocatalytic reduction of oxalic acid to glyoxylic acid.

[0063] Under the reaction conditions of Example 3, the catalyst activity was tested using linear voltammetry, and the results are shown in [Figure 3]. Figure 2 .

[0064] Under the reaction conditions of Example 3, a constant current density test was conducted. The constant current density was set to 100 mA / cm² for 1 hour. Argon gas was introduced into the cathode electrolyte to purge the cathode air, and the oxygen generated at the anode during the reaction was directly released into the air. The liquid products were analyzed using nuclear magnetic resonance spectroscopy. After the test, the current density was sequentially set to 150, 200, 250, and 300 mA / cm², while other conditions remained unchanged. The Faradaic efficiency of the triazine-derived molecular catalyst in the electrocatalytic reduction of oxalic acid to glyoxylic acid is shown in [reference needed]. Figure 3 Yields Figure 4 The partial current density of glyoxylic acid is shown in [reference needed]. Figure 5 .

[0065] Example 5

[0066] Product performance testing of triazine-derived molecular catalyst electrode in the electrocatalytic reduction of oxalic acid to glyoxylic acid.

[0067] The electrocatalytic reduction of oxalic acid to glyoxylic acid was tested using a membrane electrode electrolysis cell. A Nafion 115 membrane was used as the ion exchange membrane, and the triazine derivative molecule obtained in Example 2 was used as the catalyst. The current density was kept constant at 200 mA / cm², and the reaction was kept stable at 15–20 °C. 1 mol / L oxalic acid was used as the electrolyte at the cathode, and 0.5 mol / L H₂SO₄ was used at the anode. The Faradaic efficiency of the triazine derivative molecule catalyst in the electrocatalytic reduction of oxalic acid to glyoxylic acid was obtained by adjusting the cathode / anolyte flow rate and reaction time, as shown in Table 1.

[0068] Table 1

[0069]

[0070] like Figure 6 and Figure 7 As shown, optionally, the preparation method of the triazine-derived molecular catalyst electrode employs an atomizing device to atomize and spray the triazine-derived molecular dispersion. The atomizing device includes a housing 1, a vacuum adsorption platform 2, a platform driving cylinder 3, an atomizing nozzle mechanism, and a nozzle driving mechanism. The vacuum adsorption platform 2 is located inside the housing 1, and the carbon paper is placed on top of the vacuum adsorption platform 2. The platform driving cylinder 3 is connected to the housing 1 and is drively connected to the vacuum adsorption platform 2, driving the vacuum adsorption platform 2 to move laterally. The atomizing nozzle mechanism is located inside the housing 1, injecting the triazine-derived molecular dispersion and spraying it onto the carbon paper. The nozzle driving mechanism drives the atomizing nozzle mechanism to move longitudinally.

[0071] Specifically, the carbon paper is fixed on the vacuum adsorption platform 2. The platform drive mechanism moves the vacuum adsorption platform 2 laterally (left-right) until a portion of the carbon paper aligns with the atomizing nozzle mechanism. The nozzle drive mechanism then moves the atomizing nozzle mechanism longitudinally, spraying a portion of the carbon paper. After spraying, the platform drive mechanism moves the vacuum adsorption platform 2 laterally again, aligning the unsprayed portion with the atomizing nozzle mechanism for continued spraying. Once the carbon paper is completely sprayed, the platform drive mechanism moves the vacuum adsorption platform 2 laterally until the carbon paper is away from the atomizing nozzle mechanism.

[0072] Therefore, when the movement of the atomizing nozzle mechanism is directly adjusted, excess triazine-derived molecular dispersion may be thrown off due to the movement of the atomizing nozzle mechanism, easily dripping onto the carbon paper and causing uneven coating. By setting up a platform drive mechanism to adjust the position of the carbon paper, keeping it away from the atomizing nozzle mechanism, excess triazine-derived molecular dispersion from the atomizing nozzle mechanism is prevented from dripping onto the carbon paper, thus preventing uneven coating and ensuring the quality of the triazine-derived molecular catalyst electrode.

[0073] In this embodiment, the atomizing device also includes a slider and a guide rail 17. The guide rail 17 is welded or bolted to the inside of the housing 1 and extends in the left-right direction. The slider is welded or bolted to the lower end of the vacuum adsorption platform 2. By sliding the slider to the guide rail 17, the lateral movement of the vacuum adsorption platform 2 can be guided. Carbon paper is placed on the smooth surface of the vacuum adsorption platform 2. Through an external vacuum generator or vacuum pump, air is quickly extracted from the sealed area via the vacuum channel inside the vacuum adsorption platform 2, making the air pressure inside the sealed space much lower than the external atmospheric pressure. Atmospheric pressure is used to press the carbon paper tightly against the surface of the vacuum adsorption platform 2. When it is necessary to remove the workpiece, the vacuum source is turned off, and atmospheric pressure air is introduced into the vacuum channel. The internal and external pressures are restored to equilibrium, and the carbon paper can be removed.

[0074] like Figure 6 As shown, optionally, the atomizing nozzle mechanism includes an atomizing nozzle 4 and a nozzle rack 5, the nozzle rack 5 extending in the longitudinal direction, and the front end of the nozzle rack 5 being connected to the atomizing nozzle 4.

[0075] The nozzle drive mechanism includes a liquid storage cylinder 6, a piston 7, a piston drive cylinder 8, a piston rack 9, and a gear 10. The axial direction of the liquid storage cylinder 6 faces the longitudinal direction. The liquid storage cylinder 6 is used to communicate with the atomizing nozzle 4 and to inject the triazine derivative molecular dispersion. The piston 7 is slidably connected to the liquid storage cylinder 6 in the longitudinal direction. The piston rack 9 is connected to the piston 7. The piston drive cylinder 8 is drivenly connected to the piston rack 9. The gear 10 meshes with the nozzle rack 5 and the piston rack 9.

[0076] Specifically, the piston-driven cylinder 8 drives the piston rack 9, causing the piston rack 9 to move from front to back, pushing the piston 7 to squeeze the triazine-derived molecular dispersion into the liquid storage cylinder 6 and flow it into the atomizing nozzle 4. Secondly, both the piston rack 9 and the nozzle rack 5 mesh with the gear 10. Therefore, as the piston rack 9 moves backward, the nozzle rack 5 moves forward, facilitating the atomizing nozzle 4 to move from back to front for longitudinal spraying of the carbon paper.

[0077] Therefore, when the piston 7 completely squeezes the triazine derivative molecular dispersion in the storage cylinder 6 into the atomizing nozzle 4, the atomizing nozzle 4 completes one longitudinal spraying of the carbon paper, which can avoid excess triazine derivative molecular dispersion and further prevent uneven spraying of the carbon paper, thereby ensuring the quality of the triazine derivative molecular catalyst electrode.

[0078] In this embodiment, the atomizing nozzle 4 is a device that can convert liquid into tiny droplets, which can be a pressure atomizing nozzle, a pneumatic atomizing nozzle, an ultrasonic atomizing nozzle, etc.

[0079] likeFigure 6 and Figure 7 As shown in Figure 7 , optionally, the atomization device further includes a support base 11 and support members 12. The support base 11 is located inside the box body 1. There are two support members 12, and both of the two support members 12 are connected to the upper end of the support base 11. The nozzle rack 5 is slidably connected to one of the support members 12 in the longitudinal direction, and the piston rack 9 is slidably connected to the other support member 12 in the longitudinal direction.

[0080] Specifically, by providing the support base 11, it is convenient to provide the support members 12. By slidingly connecting the nozzle rack 5 and the piston rack 9 to one of the support members 12 respectively, the support members 12 can support and guide the nozzle rack 5 and the piston rack 9, ensuring the stability of the movement of the nozzle rack 5 and the piston rack 9.

[0081] In this embodiment, the support member 12 is provided in a shape similar to a "C". The support base 11 can be welded or bolted to the box body 1. The support member 12 can be welded or bolted to the support base 11. Secondly, as shown in Figure 6 Figure 6 and Figure 7 As shown in Figure 7 , the atomization device further includes a first connection seat 18 and a rotating shaft. The left and right ends of the first connection seat 18 are respectively welded or bolted to the upper ends of the two support members 12. The center of the gear 10 is rotatably connected to the first connection seat 18 through the rotating shaft. The rotating shaft is coaxially distributed with the rack, and the axial direction of the rotating shaft faces the up and down directions.

[0082] In addition, as shown in Figure 6 Figure 6 and Figure 7 As shown in Figure 7 , the nozzle driving mechanism further includes a connecting block 19. A chute 20 extending in the front and rear directions is provided on the right support member 12. One end of the connecting block 19 is in transmission connection with the piston driving cylinder 8, and the other end passes through the chute 20 and is connected to the piston rack 9. The connecting block 19 is slidably connected to the chute 20 in the front and rear directions.

[0083] As shown in Figure 6 Figure 6 As shown in Figure 6 , optionally, the atomization device further includes a clamp 13, a motor 14, a branch pipe 15, and a solenoid valve 16. The clamp 13 is connected to the inner wall of the box body 1. The liquid storage cylinder 6 is rotatably connected to the clamp 13. The motor 14 is used to be connected to the clamp 13 and is in transmission connection with the liquid storage cylinder 6;

[0084] The branch pipe 15 is connected to the liquid storage cylinder 6, and the branch pipe 15 is communicated with the liquid storage cylinder 6. The solenoid valve 16 is provided on the branch pipe 15.

[0085] Specifically, by providing the clamp 13, the liquid storage cylinder 6 can be supported, which is beneficial to ensuring the stability of the liquid storage cylinder 6.

[0086] Secondly, branch pipes 15 are connected to both ends of the storage cylinder 6. The left branch pipe 15 is then connected to the atomizing nozzle 4 via a hose, and the right branch pipe 15 is connected to the infusion pipe via a hose passing through the housing 1. The triazine derivative molecular dispersion is introduced from the outside through the infusion pipe port. A solenoid valve 16 is installed on the branch pipe 15. When replenishing the triazine derivative molecular dispersion into the storage cylinder 6, the solenoid valve 16 of the left branch pipe 15 is used to block the left branch pipe 15, and the solenoid valve 16 of the right branch pipe 15 is used to open the right branch pipe 15, preventing the triazine derivative molecular dispersion from prematurely entering the atomizing nozzle 4 and dripping onto the carbon paper. Furthermore, during spraying, the solenoid valve 16 of the left branch pipe 15 is used to open the left branch pipe 15, and the solenoid valve 16 of the right branch pipe 15 is used to block the right branch pipe 15, preventing the triazine derivative molecular dispersion from flowing back into the right branch pipe 15 when the piston 7 squeezes the triazine derivative molecular dispersion in the storage cylinder 6.

[0087] In addition, by using the motor 14 to drive the liquid storage cylinder 6 to rotate, the left end of the left branch pipe 15 can be tilted downward, so that the triazine derivative molecular dispersion in the liquid storage cylinder 6 flows towards the atomizing nozzle 4 under gravity, further preventing the triazine derivative molecular dispersion from flowing back to the right branch pipe 15, and making it easier to completely squeeze the triazine derivative molecular dispersion in the liquid storage cylinder 6 into the atomizing nozzle 4.

[0088] In this embodiment, as Figure 6 As shown, the atomizing device also includes a second connecting seat 21, wherein two clamps 13 are provided, located at the front and rear ends of the liquid storage cylinder 6 respectively. One end of the clamp 13 is welded to the inner wall of the housing 1, and the other end is provided with a ring. The liquid storage cylinder 6 is inserted into the ring and can rotate relative to the ring. The second connecting seat 21 is welded or bolted to the rear clamp 13, and the motor 14 is welded or bolted to the second connecting seat 21.

[0089] Another embodiment of the present invention describes the application of a triazine-derived molecular catalyst electrode in the electrocatalytic reduction of oxalic acid to glyoxylic acid, using the aforementioned triazine-derived molecular catalyst electrode.

[0090] Specifically, using a triazine-derived molecular catalyst electrode, the electrocatalytic reduction of oxalic acid to glyoxylic acid exhibits high current density, and its Faraday efficiency and stability are comparable to those of mainstream metal catalysts. Furthermore, the catalyst also demonstrates high selectivity for the target product.

[0091] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A triazine-derived molecular catalyst electrode, characterized in that, include: Carbon paper, wherein the carbon paper has a porous structure; The triazine-derived molecular catalyst is disposed on the carbon paper.

2. The triazine-derived molecular catalyst electrode according to claim 1, characterized in that, The triazine-derived molecule catalyst has a triazine-derived molecule loading of 0.5~1.0 mg / cm2.

3. A method for preparing a triazine-derived molecular catalyst electrode, characterized in that, Includes the following steps: Step S1: Sonicate the carbon paper sequentially in acetone and ethanol. Step S2: The triazine derivative molecules are ultrasonically dispersed in ethanol, and Nafion solution is added as a binder to obtain a triazine derivative molecule dispersion. Step S3: The triazine-derived molecular dispersion is atomized and sprayed onto the carbon paper.

4. The method for preparing the triazine-derived molecular catalyst electrode according to claim 3, characterized in that, Step S1 further includes: the treatment time of acetone and ethanol is 5 minutes per cycle.

5. The method for preparing the triazine-derived molecular catalyst electrode according to claim 3, characterized in that, Step S2 further includes: the ultrasonic dispersion time of the triazine derivative molecules in the ethanol is 20 minutes, the amount of ethanol is 0.4~0.5 mL / mg, and the ratio of the Nafion solution to the triazine derivative molecules is 5~15 µL / mg.

6. The method for preparing the triazine-derived molecular catalyst electrode according to claim 3, characterized in that, The triazine-derived molecular dispersion is atomized and sprayed using an atomizing device, characterized in that the atomizing device comprises: Box (1); Vacuum adsorption platform (2), the vacuum adsorption platform (2) is located inside the box (1), and the carbon paper is placed on the top of the vacuum adsorption platform (2); Platform driving cylinder (3) is connected to the housing (1) and is connected to the vacuum adsorption platform (2) in a transmission manner. The platform driving cylinder (3) is used to drive the vacuum adsorption platform (2) to move in the lateral direction. Atomizing nozzle mechanism, the atomizing nozzle mechanism is located inside the housing (1), the atomizing nozzle mechanism is used to inject the triazine derivative molecular dispersion and spray the carbon paper; A nozzle drive mechanism is provided to drive the atomizing nozzle mechanism to move in the longitudinal direction.

7. The method for preparing the triazine-derived molecular catalyst electrode according to claim 6, characterized in that, The atomizing nozzle mechanism includes an atomizing nozzle (4) and a nozzle rack (5). The nozzle rack (5) extends in the longitudinal direction, and the front end of the nozzle rack (5) is connected to the atomizing nozzle (4). The nozzle drive mechanism includes a liquid storage cylinder (6), a piston (7), a piston drive cylinder (8), a piston rack (9), and a gear (10). The axial direction of the liquid storage cylinder (6) is oriented towards the longitudinal direction. The liquid storage cylinder (6) is used to communicate with the atomizing nozzle (4). The liquid storage cylinder (6) is used to inject the triazine derivative molecular dispersion. The piston (7) is slidably connected to the liquid storage cylinder (6) in the longitudinal direction. The piston rack (9) is connected to the piston (7). The piston drive cylinder (8) is drivenly connected to the piston rack (9). The gear (10) meshes with the nozzle rack (5) and the piston rack (9).

8. The method for preparing the triazine-derived molecular catalyst electrode according to claim 7, characterized in that, The atomizing device also includes a support base (11) and a support member (12). The support base (11) is located inside the housing (1). There are two support members (12). Both support members (12) are connected to the upper end of the support base (11). The nozzle rack (5) is slidably connected to one of the support members (12) in the longitudinal direction. The piston rack (9) is slidably connected to the other support member (12) in the longitudinal direction.

9. The method for preparing the triazine-derived molecular catalyst electrode according to claim 7, characterized in that, The atomizing device also includes a clamp (13), a motor (14), a branch pipe (15), and a solenoid valve (16). The clamp (13) is connected to the inner wall of the box (1), and the liquid storage cylinder (6) is rotatably connected to the clamp (13). The motor (14) is used to connect to the clamp (13) and to drive the liquid storage cylinder (6). The liquid storage cylinder (6) is connected to the branch pipe (15), the branch pipe (15) is connected to the liquid storage cylinder (6), and the solenoid valve (16) is provided on the branch pipe (15).

10. The application of a triazine-derived molecular catalyst electrode in the electrocatalytic reduction of oxalic acid to glyoxylic acid, characterized in that, The triazine-derived molecular catalyst electrode as described in claim 1 or 2 is applied.

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