Conductive y zeolite molecular sieve, its preparation method and application
By introducing chromium or zirconium ions into the Y zeolite molecular sieve framework, the problem of poor conductivity of Y zeolite molecular sieve was solved, and the conductivity and structural stability were improved, thus expanding its application in electrochemical catalytic reactions.
Patent Information
- Application Number
- CN202411961264.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2044-12-30
AI Technical Summary
Existing Y zeolite molecular sieves are limited in their application in the field of electrocatalysis due to their electrical insulation properties, and there is a lack of technical means to directly improve their conductivity.
By introducing chromium or zirconium ions into the Y zeolite molecular sieve framework and partially replacing aluminum ions, combined with hydrothermal treatment and calcination processes, conductive Y zeolite molecular sieves are formed.
It significantly improves the electrical conductivity of Y zeolite molecular sieves, enhances mass transport efficiency and reactivity, retains crystal structure stability, and expands its application in electrochemical catalytic reactions.
Smart Images
Figure CN119774633B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of inorganic molecular sieve catalyst preparation technology, and particularly relates to a conductive Y zeolite molecular sieve, its preparation method and application. Background Technology
[0002] The general chemical formula for Y zeolite molecular sieves is Na₂O·Al₂O₃·wSiO₂·xH₂O. Its internal structure is highly ordered, possessing abundant acid / base sites, a high specific surface area, and good chemical / thermal stability, making it widely applicable in petrochemicals, metallurgy, and traditional catalysis. However, the inherent electrical insulation properties of Y zeolite molecular sieves severely limit their application in electrocatalysis. Therefore, it is necessary to improve the electrical conductivity of Y zeolite molecular sieves.
[0003] Currently, the common approach in related fields is to improve the conductivity of the overall catalytic system by combining catalytically active substances such as metal compounds with Y zeolite molecular sieves. There are few reports on directly modifying the conductivity of Y zeolite molecular sieves themselves. Summary of the Invention
[0004] This application discloses a conductive Y zeolite molecular sieve, its preparation method and application, aiming to solve the technical problems of poor intrinsic conductivity and poor stability of existing Y zeolite molecular sieves.
[0005] To achieve the above objectives, the technical solution of this application is:
[0006] The first aspect of this application provides a conductive Y zeolite molecular sieve with the chemical formula Na₂O·Al. y R 2-y O3·wSiO2·xH2O;
[0007] Where 0 < y < 2, w is 20-10, and x is 1-3;
[0008] R is selected from either chromium ions or zirconium ions.
[0009] Preferably, in conjunction with the first aspect, its chemical formula is Na₂O·Al y R 2-y O3·wSiO2·xH2O;
[0010] Where 0.7≤y≤1.3, w is 20-10, and x is 1-3;
[0011] R is selected from either chromium ions or zirconium ions.
[0012] The second aspect of this application provides a method for preparing the conductive Y zeolite molecular sieve described in the first aspect, the method comprising:
[0013] After mixing and stirring the metal source, Al(NO3)3·9H2O, silica sol, NaOH and water, the mixture is subjected to hydrothermal treatment, dispersed in NH4Cl solution, dried and then calcined. The mixture is then removed and ground to obtain the conductive Y zeolite molecular sieve.
[0014] The metal source is a chromium compound or a zirconium compound.
[0015] Preferably, in conjunction with the second aspect, the silica sol is Ludox HS-40.
[0016] Preferably, in conjunction with the second aspect, the mass ratio of the metal source, Al(NO3)3·9H2O, silica sol, NaOH, and deionized water is 0.2-0.3:1.2:4.5:10:180.
[0017] In conjunction with the second aspect, preferably, the metal source is one of chromium nitrate hydrate and zirconium nitrate hydrate.
[0018] In conjunction with the second aspect, preferably, the temperature during the hydrothermal treatment is 140-190℃ and the time is 20-30h.
[0019] In conjunction with the second aspect, preferably, the calcination treatment is carried out at a temperature of 600-650℃ for 5-10 hours.
[0020] The third aspect of this application provides the application of the conductive Y zeolite molecular sieve described in the first aspect or the conductive Y zeolite molecular sieve prepared by the preparation method described in the second aspect in electrochemical catalytic reactions.
[0021] Compared with the prior art, the advantages or beneficial effects of the embodiments of this application include at least the following:
[0022] The conductive Y zeolite molecular sieve provided in this application introduces chromium or zirconium ions into the Y zeolite framework and replaces some Al ions. On the one hand, this polarizes the Y zeolite molecular sieve framework, reduces its band gap, promotes electron transport, and thus significantly improves the electrical conductivity of the zeolite. On the other hand, it retains the intrinsic morphological structure of the zeolite molecular sieve. Furthermore, the atomic radius of chromium or zirconium ions is larger than that of aluminum ions, which can increase the pore size, greatly reduce mass transfer resistance, and enhance mass transport efficiency and reactivity. At the same time, it retains the crystal structure of the Y zeolite molecular sieve and significantly improves the crystallinity of the modified Y zeolite molecular sieve, further improving its structural stability and reactivity. This breakthrough overcomes the application bottleneck of Y zeolite molecular sieves in the electrochemical field and has broad application prospects in electrochemical catalytic reactions. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 XRD patterns of Al-conductive Y zeolite molecular sieves (CrY) and Al-conductive Y zeolite molecular sieves (ZrY) prepared for embodiments of this application;
[0025] Figure 2 XRD magnified comparison images of Al-conductive Y zeolite molecular sieve (CrY), A2-conductive Y zeolite molecular sieve (ZrY), and Y zeolite prepared in the embodiments of this application;
[0026] Figure 3 SEM images of Al-conductive Y zeolite molecular sieve (CrY), A2-conductive Y zeolite molecular sieve (ZrY), and Y zeolite prepared for embodiments of this application;
[0027] Figure 4 Elemental distribution diagrams of Al-conductive Y zeolite molecular sieves (CrY) and A2-conductive Y zeolite molecular sieves (ZrY) prepared for embodiments of this application;
[0028] Figure 5 Nitrogen adsorption-desorption curves of Al-conductive Y zeolite molecular sieve (CrY), A2-conductive Y zeolite molecular sieve (ZrY) and Y zeolite molecular sieve prepared for the embodiments of this application.
[0029] Figure 6 Linear sweep voltammetry curve of the catalyst made of conductive Y zeolite molecular sieve in the HER reaction of water electrolysis provided in the embodiments of this application;
[0030] Figure 7 Linear sweep voltammetry curve of the catalyst made of conductive Y zeolite molecular sieve provided in the embodiments of this application in the OER reaction of water electrolysis. Detailed Implementation
[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0032] In the following description of this embodiment, the term "and / or" is used to describe the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, B existing alone, and A and B existing simultaneously. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0033] In the following description of this embodiment, the term "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, "at least one of a, b, or c", or "at least one of a, b, and c", can both mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can be single or multiple.
[0034] Those skilled in the art should understand that, in the following description of the embodiments of this application, the sequence of numbers does not imply the order of execution. Some or all steps may be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0035] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms "a" and "the" as used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.
[0036] It should be noted that all raw materials and reagents in the embodiments of this application were purchased from the market or prepared according to conventional methods known to those skilled in the art.
[0037] In a first aspect, embodiments of this application provide a conductive Y zeolite molecular sieve with the chemical formula Na₂O·Al. y R 2- y O3·wSiO2·xH2O;
[0038] Where 0 < y < 2, w is 20-10, and x is 1-3;
[0039] R is selected from either chromium ions or zirconium ions.
[0040] In one aspect, it can polarize the framework of Y zeolite molecular sieve, reduce its band gap, promote electron transport, and thus significantly improve the electrical conductivity of zeolite. In another aspect, it can retain the intrinsic morphological structure of zeolite molecular sieve, and since the atomic radius of chromium or zirconium ions is larger than that of aluminum ions, it can expand the pore size, greatly reduce mass transfer resistance, and enhance mass transport efficiency and reactivity. At the same time, it can retain the crystal structure of Y zeolite molecular sieve and significantly improve the crystallinity of the modified zeolite, further improving its structural stability and reactivity. This breakthrough overcomes the application bottleneck of zeolite molecular sieves in the field of electrochemistry and has broad application prospects in electrochemical catalytic reactions.
[0041] It should be noted that the chemical formula of the Y zeolite molecular sieve provided in this application is Na₂O·Al. y R 2-y O3·wSiO2·xH2O; where 0.7≤y≤1.3, w is 20-10, and x is 1-3; R is selected from chromium ions and zirconium ions. It was also found that the introduction of transition metal chromium ions and zirconium ions into the Y zeolite molecular sieve framework, through partial substitution of aluminum ions, polarizes the framework, reduces the band gap, promotes electron transport, and thus improves the electrical conductivity of the modified Y zeolite molecular sieve.
[0042] Secondly, embodiments of this application also provide a method for preparing the conductive Y zeolite molecular sieve described in the first aspect, the preparation method comprising:
[0043] After mixing and stirring the metal source, Al(NO3)3·9H2O, silica sol, NaOH and water, the mixture is subjected to hydrothermal treatment, dispersed in NH4Cl solution, dried and then calcined. The mixture is then removed and ground to obtain the conductive Y zeolite molecular sieve.
[0044] The metal source is a chromium compound or a zirconium compound.
[0045] It should be noted that the water used in this application is preferably deionized water, which can eliminate the influence of other impurities on the reaction. The silica sol is preferably Ludox HS-40, which can improve the cohesive strength of the zeolite molecular sieve.
[0046] In this embodiment, the preferred mass ratio of the metal source, Al(NO3)3·9H2O, Ludox HS-40, NaOH, and deionized water is 0.2-0.3:1.2:4.5:10:180. By controlling the proportion of each substance, sufficient contact between the substances in the solution can be ensured, thereby controlling the number of metal ions from the metal source entering the zeolite framework. This significantly improves the conductivity of the modified zeolite, thus enhancing the application of this type of catalyst in electrocatalytic reactions.
[0047] In this embodiment, the metal source is preferably one of chromium nitrate and zirconium nitrate. By selecting the nitrates corresponding to these metal ions, not only can the influence of other acid radicals be prevented, but they can also be uniformly dissolved in the reaction solution, providing a basis for further complete reaction.
[0048] In this embodiment, the hydrothermal treatment temperature is preferably 140-190℃, such as 140℃, 150℃, 160℃, 170℃, 180℃, 190℃, or any temperature within this range; the time is preferably 20-30h, such as 20h, 22h, 24h, 26h, 28h, 30h, or any time within this range. By controlling the temperature and time of the hydrothermal reaction in the mixed solution, crystal formation can be maximized, and the integrity of the crystallization process can be ensured.
[0049] In this embodiment, the calcination temperature is preferably 600-650℃, and the time is preferably 5-10 hours. By controlling the temperature and time of the calcination treatment, organic matter, impurities, or adsorbates within the zeolite pores and channels can be removed, stabilizing the zeolite structure. Ammonium chloride is added for ion exchange; ammonium chloride acts as a modifying agent, entering the zeolite channels and framework through ion exchange. The purpose of this step is to use NH4... + Replacing metal ions in zeolites alters their framework structure and surface properties. Zeolites exchanged with ammonium chloride may exhibit significantly improved adsorption performance and selectivity. Calcination primarily aims to further stabilize the zeolite structure and activate its catalytically active sites. Following ammonium chloride exchange, NH4+ is introduced into the zeolite. + Ions, these ions will transform into H at high temperatures + Ions, thus forming bronsted acidic sites. Simultaneously, during calcination, NH4+ in the zeolite framework... + The ions will decompose and release under heating conditions, transforming into H+. + -Y zeolite molecular sieves possess acidic sites that are crucial for electrocatalytic chemical reactions. It is important to note that excessively high temperatures and prolonged calcination times can damage the zeolite's framework structure and reduce its crystallinity. Therefore, controlling the appropriate calcination temperature and time is essential.
[0050] Thirdly, embodiments of this application also provide the application of the conductive Y zeolite molecular sieve described in the first aspect or prepared by the method described in the second aspect in electrochemical catalytic reactions. Based on the excellent conductivity, crystallinity, reactivity, structural stability, and thermal stability of the prepared conductive Y zeolite molecular sieve, it has broad application prospects in electrocatalytic reactions, such as in water electrolysis, fuel cells, and nitrogen reduction reactions.
[0051] The technical solution of this application will be further described below with reference to specific embodiments.
[0052] Example 1
[0053] This embodiment provides a method for preparing Al-conductive Y zeolite molecular sieve (CrY), specifically including:
[0054] Cr(NO3)2·9H2O, Al(NO3)3·9H2O, Ludox HS-40 (40% silica gel), NaOH and deionized water were mixed and stirred at a molar ratio of 0.3:1.2:4.5:10:180 for 24 h. The mixture was then subjected to hydrothermal reaction at 160 °C for 12 h. The resulting solid was centrifuged, washed several times with deionized water, and then vacuum dried. The resulting crystals were dispersed in NH4Cl solution and stirred vigorously for 3 h. Afterward, the crystals were centrifuged and washed several times with deionized water to remove residual chloride ions. The crystals were then dried and calcined at 600 °C for 5 h to obtain Al-conductive Y zeolite molecular sieve (CrY).
[0055] Example 2
[0056] This embodiment provides a method for preparing A2-conductive Y zeolite molecular sieve (ZrY), specifically including:
[0057] Zr(NO3)3·5H2O, Al(NO3)3·9H2O, Ludox HS-40, NaOH, and deionized water were mixed and stirred at a molar ratio of 0.2:1.2:4.5:10:180 for 24 h. The mixture was then subjected to hydrothermal reaction at 140 °C for 18 h. The resulting solid was centrifuged, washed several times with deionized water, and then vacuum dried. The resulting crystals were dispersed in NH4Cl solution and stirred vigorously for 3 h. Afterward, the crystals were centrifuged and washed several times with deionized water to remove residual chloride ions. The crystals were then dried and calcined at 650 °C for 6 h to obtain A2-conductive Y zeolite molecular sieve (ZrY).
[0058] Meanwhile, to verify the comprehensive performance of the conductive Y zeolite molecular sieves prepared in the above embodiments, this application provides the following comparative examples for detailed illustration.
[0059] Comparative Example 1
[0060] This comparative example uses unmodified Y zeolite molecular sieve as Comparative Example 1, denoted as B1-Y zeolite molecular sieve (Y).
[0061] Comparative Example 2
[0062] This comparative example provides a method for preparing B2-Y zeolite molecular sieves (ZnY), specifically including:
[0063] Zn(NO3)2·6H2O, Al(NO3)3·9H2O, Ludox HS-40 (40% silica gel), NaOH and deionized water were mixed and stirred at a molar ratio of 0.3:1.2:4.5:10:180 for 24 h. The mixture was then subjected to hydrothermal reaction at 160 °C for 12 h. The resulting solid was centrifuged, washed several times with deionized water, and then vacuum dried. The resulting crystals were then dispersed in NH4Cl solution and stirred vigorously for 3 h. After centrifugation and washing several times with deionized water to remove residual chloride ions, the crystals were dried and then calcined at 600 °C for 5 h to obtain B2-Y zeolite molecular sieve (ZnY).
[0064] Comparative Example 3
[0065] This comparative example provides a method for preparing B3-Y zeolite molecular sieve (CdY), specifically including:
[0066] Cd(NO3)2·4H2O, Al(NO3)3·9H2O, Ludox HS-40 (40% silica gel), NaOH, and deionized water were mixed and stirred at a molar ratio of 0.3:1.2:4.5:10:180 for 24 h. The mixture was then subjected to hydrothermal reaction at 160 °C for 12 h. The resulting solid was centrifuged, washed several times with deionized water, and then vacuum dried. The resulting crystals were then dispersed in NH4Cl solution and stirred vigorously for 3 h. After centrifugation and washing several times with deionized water to remove residual chloride ions, the crystals were dried and then calcined at 600 °C for 5 h to obtain B3-Y zeolite molecular sieve (CdY).
[0067] To verify the appearance and structure of the conductive Y zeolite molecular sieve prepared in the embodiments of this application, XRD and scanning electron microscopy tests were performed on CrY and ZrY prepared in the embodiments of this application. The test results are as follows: Figures 1-3 As shown. Among them, Figure 1 XRD patterns of CrY, ZrY and Y zeolite molecular sieves; Figure 2 This is a magnified view of a specific area.
[0068] Figure 3 SEM images of CrY, ZrY and Y zeolite molecular sieves; Figure 4 The elemental distribution diagrams for CrY and ZrY zeolite molecular sieves are shown.
[0069] according to Figure 1 and Figure 2It can be seen that the modified CrY and ZrY retain the crystal structure characteristics of Y zeolite molecular sieves. Furthermore, due to the larger atomic radii of Cr and Zr compared to Al, the original lattice of the modified Y zeolite molecular sieve expands, causing the image to shift towards a smaller angle. The peaks of the modified CrY and ZrY zeolite molecular sieves are also sharper, indicating that the modified crystals possess higher crystallinity and better crystal structure order, significantly improving the crystallinity of the zeolite.
[0070] according to Figure 3 As is known, the morphology of the modified CrY and ZrY zeolite molecular sieves (a) Y zeolite molecular sieve, b) CrY zeolite molecular sieve, and c) ZrY zeolite molecular sieves did not change compared with the unmodified Y zeolite molecular sieve in Comparative Example 1. The particle size was distributed between 300-500 nm, and there was no obvious agglomeration.
[0071] according to Figure 4 The following are elemental distribution diagrams of CrY and ZrY zeolite molecular sieve materials, respectively. Among them, a) is the elemental distribution diagram of Al, O, Si and Cr in CrY zeolite molecular sieve; b) is the elemental distribution diagram of Al, O, Si and Cr in ZrY zeolite molecular sieve. It can be clearly seen that Cr and Zr ions have successfully replaced some Al atoms and embedded in the framework of Y zeolite molecular sieve.
[0072] To verify the specific surface area of the conductive Y zeolite molecular sieve prepared in the embodiments of this application, nitrogen adsorption-desorption tests were performed on CrY and ZrY prepared in the embodiments of this application. The test results are as follows: Figure 5 As shown. Among them, Figure 5 Nitrogen adsorption-desorption tests were performed on CrY, ZrY and Y zeolite molecular sieves.
[0073] according to Figure 5 As can be seen, compared with the Y zeolite molecular sieve in Comparative Example 1, the specific surface area of the modified CrY zeolite molecular sieve remained basically unchanged, while the ZrY zeolite molecular sieve showed a significant decreasing trend, but its specific surface area could still be maintained at 430 m². 2 The presence of / g or more indicates that the modified CrY and ZrY zeolite molecular sieves retain the three-dimensional pore structure of traditional Y zeolite molecular sieves, making them excellent supports for heterogeneous catalysts.
[0074] To verify the conductivity of the conductive Y zeolite molecular sieves prepared in the embodiments of this application, the conductivity of CrY and ZrY prepared in the comparative embodiments and ZnY and CdY prepared in the comparative examples of this application was tested. The conductivity was tested using an intelligent powder resistivity tester, and the test results are shown in Table 1.
[0075] Table 1. Conductivity results of Y zeolite molecular sieves prepared in the examples and comparative examples.
[0076] Serial Number σ(S / m) Y <![CDATA[0.39×10 -4 ]]> CrY 1.09 ZrY 1.12 ZnY 0.82 CdY 0.61
[0077] As shown in Table 1, the content of unmodified Y zeolite molecular sieve is 0.39 × 10⁻⁶. -4 Compared with the 0.82 S / m of the modified ZnY zeolite molecular sieve and the 0.61 S / m of the CdY zeolite molecular sieve in the comparative examples, the conductivity of the CrY and ZrY zeolite molecular sieves prepared in the examples was further improved, showing excellent electrical conductivity. Using the same preparation process, introducing zinc ions and cadmium ions into the Y zeolite molecular sieve framework can also improve the conductivity. However, since the number of impurity energy levels formed when Zn and Cd ions interact with the zeolite framework is small, the number of charge carriers increased is limited, and the conductivity cannot be further improved. The improvement in conductivity greatly enhances the practicality of Y zeolite molecular sieve materials in energy conversion and catalysis.
[0078] To verify the application of the conductive Y zeolite molecular sieve prepared in the embodiments of this application in the water electrolysis reaction: a catalyst was prepared using ZrY as a support and Ni and Co metals as active components, and the water electrolysis reaction was carried out.
[0079] The catalyst was prepared as follows: 57.93 mg and 67.85 mg of NiCl2 and CoCl2 powders were weighed and added to 400 μL of deionized water. The mixture was sonicated for 2-5 min to ensure uniform dispersion of the solute and absence of precipitates. 300 mg of ZrY was weighed into a glass bottle and added to the above solution in portions using a pipette. The mixed solution was sonicated for 3 h to fully impregnate the modified molecular sieve with NiCl2 and CoCl2. The sonicated solution was vacuum dried at 90 °C for 2 h to remove moisture. Then, it was transferred to a tube furnace and annealed at 650 °C for 5 h under an Ar atmosphere to obtain the catalyst.
[0080] Test method: Electrolysis performance of water was tested using a three-electrode system: 5 mg of catalyst was added to deionized water, isopropanol, and Nafion solution and mixed thoroughly. The mixture was then dropped onto a 1*1.2 cm electrode. 2 The electrode was applied to nickel foam. Carbon paper served as the working electrode, a carbon rod as the counter electrode, and an Hg / HgO electrode as the reference electrode. The electrolyte was a 1M KOH solution. The test results are as follows: Figure 6-7 As shown:
[0081] according to Figure 6 It can be seen that the LSV curve (linear sweep voltammetry curve) of the catalyst in the alkaline HER test shows that the catalyst at 10 mA / cm 2 At current density, the overpotential is 118mV, and at 50mA / cm 2 At the given current density, the overpotential is 344.6 mV, indicating that the catalyst has high catalytic activity and a fast reaction rate.
[0082] according to Figure 7It can be seen that the LSV curve (linear sweep voltammetry curve) of the catalyst in OER shows that the catalyst at 10 mA / cm 2 At a current density of 297 mV, the overpotential is only 297 mV, indicating that the catalyst has high reactivity.
[0083] Therefore, the conductive Y zeolite molecular sieve provided in this application is obtained by introducing chromium ions or zirconium ions into the Y zeolite framework and replacing some of the Al ions. This can significantly improve the conductivity of the Y zeolite molecular sieve, retain the morphology and three-dimensional pore structure of the Y zeolite molecular sieve, endow it with excellent reactivity and structural stability, retain the crystal structure of the Y zeolite molecular sieve and significantly improve the crystallinity of the modified Y zeolite molecular sieve, further improving its thermal stability and reactivity. It has broad application prospects in electrochemical catalytic reactions.
[0084] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.
[0085] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.
Claims
1. An application of a conductive Y zeolite molecular sieve in electrochemical catalytic reactions, characterized in that, Conductive Y zeolite molecular sieves are prepared by introducing chromium or zirconium ions into the Y zeolite framework and replacing some aluminum ions.
2. The application of the conductive Y zeolite molecular sieve according to claim 1 in electrochemical catalytic reactions, characterized in that, The preparation method of the conductive Y zeolite molecular sieve includes: The metal source, Al(NO3)3·9H2O, silica sol, NaOH and water were mixed and stirred, then subjected to hydrothermal treatment, dispersed in NH4Cl solution, dried and calcined, and then ground to obtain the conductive Y zeolite molecular sieve. The metal source is a chromium compound or a zirconium compound.
3. The application of the conductive Y zeolite molecular sieve according to claim 2 in electrochemical catalytic reactions, characterized in that... The silica sol is Ludox HS-40.
4. The application of the conductive Y zeolite molecular sieve according to claim 2 in electrochemical catalytic reactions, characterized in that... The metal source is one of chromium nitrate hydrate and zirconium nitrate hydrate.
5. The application of the conductive Y zeolite molecular sieve according to claim 2 in electrochemical catalytic reactions, characterized in that... The hydrothermal treatment is performed at a temperature of 140-190℃ for 20-30 hours.
6. The application of the conductive Y zeolite molecular sieve according to claim 2 in electrochemical catalytic reactions, characterized in that... The calcination treatment is carried out at a temperature of 600-650℃ for 5-10 hours.
Citation Information
Patent Citations
Metal exchanged zeolite and ceramic composite therefrom
EP0260071A2
Methods of preparing metal containing inorganic ion exchangers
US20140286857A1