A three-electrode electrochemical La Man applicable detection reaction cell

Abstract

This invention discloses a three-electrode electrochemical Raman universal detection reaction cell, comprising a cell body, a cell cover sealed to the cell body, and a heating assembly located at the bottom of the cell body; a reaction chamber is disposed in the middle of the cell body, and a working electrode, a reference electrode, and a counter electrode are disposed on the cell body and inserted into the reaction chamber; an observation port is provided on the cell cover, and a quartz window is disposed between the cell cover and the cell body, with the quartz window opposite to the observation position on the working electrode; the heating assembly includes a heating element, a heat-conducting block, and a casing. This design adopts a modular combination of the cell cover, cell body, and heating assembly, and uses a side-insertion electrode installation method. The volume of the reaction chamber is approximately 5 ml. The entire reaction cell has a compact structure, is easy to assemble and disassemble, and is suitable for micro-reaction environments. The heating element, together with the heat-conducting block, can uniformly heat and precisely control the temperature of the reaction system, stabilizing the temperature of the reaction system and reducing the interference of the thermal field on the Raman optical path.

Description

Technical Field

[0001] This utility model relates to the field of electrochemical reaction cells, and more specifically, to a three-electrode electrochemical pull-down reaction cell for detection. Background Technology

[0002] The three-electrode chemical system is a commonly used configuration in electrochemical experiments, consisting of a working electrode, a counter electrode, and a reference electrode. This system is widely used in various electrochemical analyses and reaction studies, especially in potential-controlled experiments such as cyclic voltammetry (CV) and linear sweep voltammetry (LSV). Raman spectroscopy is an analytical technique that studies molecular structure, composition, and chemical structure by analyzing the interaction between matter and light. Based on the principle of Raman scattering, it is widely used in materials analysis, materials science, biomedicine, and environmental monitoring.

[0003] The three-electrode electrochemical Raman combined detection reaction cell is an analytical tool that combines electrochemical and Raman spectroscopy techniques to acquire molecular information in real time during electrochemical reactions. This technology can simultaneously provide current and potential information of the electrochemical reaction, as well as molecular-level chemical changes in the reaction system, exhibiting strong analytical capabilities and being particularly suitable for research in fields such as electrochemical catalysis, surface reactions, and corrosion processes.

[0004] Traditional reaction cells use rod-shaped electrodes (such as graphite rod counters) to block the laser path, resulting in a 30%-50% reduction in Raman signal acquisition efficiency. External heating devices (such as heating stages) exhibit temperature gradients (±2.5℃@60℃), affecting reaction kinetic studies. The overall structural design of traditional reaction cells is unreasonable, assembly is difficult, and they are not well-suited for micro-reaction environments. Utility Model Content

[0005] The purpose of this invention is to provide a three-electrode electrochemical pull-down reaction cell for use in order to solve the technical problems existing in the background art.

[0006] This utility model provides a three-electrode electrochemical Raman universal detection reaction cell, including a cell body, a cell cover sealed to the cell body, and a heating assembly located at the bottom of the cell body;

[0007] A reaction chamber is provided in the middle of the pool body, and a working electrode, a reference electrode, and a counter electrode are provided on the pool body and inserted into the reaction chamber; an observation port is provided on the pool cover, and a quartz window is provided between the pool cover and the pool body, with the quartz window being positioned opposite to the observation position on the working electrode;

[0008] The heating assembly includes a heating element, a heat-conducting block, and an encapsulation shell for encapsulating the heating element and the heat-conducting block at the bottom of the pool body. The heat-conducting block is in contact with the bottom of the pool body and is located in the external region of the reaction chamber.

[0009] In a preferred embodiment, a heat-conducting block mounting groove is provided at the bottom of the pool body, and the heat-conducting block is embedded in the heat-conducting block mounting groove. A heating element mounting groove is provided on the encapsulation shell, and the heating element is embedded in the heating element mounting groove.

[0010] In a preferred embodiment, the heat-conducting block includes a base block and side blocks disposed on both sides of the base block, the base block being located at the bottom of the reaction chamber and the side blocks being located on the sides of the reaction chamber.

[0011] In a preferred embodiment, the heating element is a ceramic heating element, and the heat-conducting block is a copper heat-conducting block.

[0012] In a preferred embodiment, the volume of the reaction chamber is 4.8-5.2 ml.

[0013] In a preferred embodiment, the working electrode, the reference electrode, and the counter electrode are horizontally inserted into the reaction chamber from three sides of the cell.

[0014] In a preferred embodiment, the working electrode, the reference electrode, and the counter electrode are all sealed to the reaction chamber of the cell.

[0015] In a preferred embodiment, the working electrode is an L-shaped glassy carbon electrode, the reference electrode is a silver chloride electrode, and the counter electrode is a platinum wire ring electrode.

[0016] In a preferred embodiment, the pool body is further provided with an electrolyte inlet channel communicating with the reaction chamber.

[0017] The beneficial effects of this utility model's technical solution are:

[0018] This design adopts a modular combination of the tank cover, tank body, and heating components, and uses a side-insertion electrode installation method. The volume of the reaction chamber is about 5ml. The entire reaction tank has a compact structure, is easy to disassemble and assemble, and is suitable for micro-reaction environments. The heating element, together with the heat-conducting block, can uniformly heat the reaction system and precisely control the temperature, so that the temperature of the reaction system is stable and the interference of the thermal field on the Raman optical path is reduced. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is an exploded view of the structure of this utility model.

[0021] Figure 3 This is an exploded view of the structure of this utility model from another perspective.

[0022] Figure 4 This is a cross-sectional view of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1. Pool body; 2. Pool cover; 3. Quartz window; 4. Working electrode; 5. Reference electrode; 6. Counter electrode; 7. Heating assembly; 8. Heating element; 9. Heat-conducting block; 10. Base block; 11. Side block; 12. Encapsulation shell; 13. Heat-conducting block mounting groove; 14. Heating element mounting groove; 15. Reaction chamber; 16. Observation position; 17. Electrolyte inlet channel; 18. Sealing gasket; 19. Sealing ring. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0025] like Figures 1-4 As shown, this utility model provides a three-electrode electrochemical La Manson combined detection reaction cell, including a cell body 1, a cell cover 2 sealed to the cell body 1, and a heating assembly 7 located at the bottom of the cell body 1. A reaction chamber 15 is provided in the middle of the cell body 1, and a working electrode 4, a reference electrode 5, and a counter electrode 6 are provided on the cell body 1 and inserted into the reaction chamber 15. An observation port is provided on the cell cover 2, and a quartz window 3 is provided between the cell cover 2 and the cell body 1. The quartz window 3 is positioned opposite to the observation position 16 on the working electrode 4.

[0026] In the above scheme, when performing corresponding substance detection, such as catalyst detection, the catalytic material is coated on the observation position 16 of the working electrode 4. Then, each electrode is installed on the cell body 1, followed by the installation of the quartz window 3 and the cell cover 2. A sealing gasket 18 is placed between the cell cover 2 and the cell body 1 to achieve a sealed connection. The cell body 1 is also provided with an electrolyte inlet channel 17 that communicates with the reaction chamber 15. The corresponding electrolyte is introduced into the reaction chamber 15 through this channel, a working potential is applied, and an electrochemical reaction is triggered. At the same time, Raman light passes through the quartz window 3 and irradiates the observation position 16 for reaction detection. The chemical information of the sample surface is collected by a Raman spectrometer.

[0027] The tank body 1 in this design is made of PEEK (polyetheretherketone), with a temperature resistance of 250℃. The tank cover 2 is made of 316L stainless steel, 3mm thick, and resistant to most common corrosions. The reaction chamber 15 has a volume of 4.8-5.2ml, suitable for micro-detection systems, and allows for better temperature control. The quartz window 3 features a dual-thickness design (1mm standard type / 0.5mm high-sensitivity type, with a light transmittance of 96.4%).

[0028] The heating assembly 7 includes a heating element 8, a heat-conducting block 9, and an encapsulation shell 12 for encapsulating the heating element 8 and the heat-conducting block 9 at the bottom of the pool body 1. The heat-conducting block 9 is in contact with the bottom of the pool body and located in the external region of the reaction chamber 15. A heat-conducting block mounting groove 13 is provided at the bottom of the pool body 1, and the heat-conducting block 9 is embedded in the heat-conducting block mounting groove 13. A heating element mounting groove 14 is provided on the encapsulation shell 12, and the heating element 8 is embedded in the heating element mounting groove 14. The heating element 8 is a ceramic heating element 8, and the heat-conducting block 9 is a copper heat-conducting block 9.

[0029] In the above scheme, by combining the embedded ceramic heating element 8 (20×10×1mm) with the copper heat-conducting block 9 (thermal conductivity 401W / m·K), the heating rate reaches 5℃ / s. 5 The reaction chamber 15 is heated rapidly and the temperature is more stable during the reaction process by using ceramic heating elements 8 and copper blocks 9 for heat conduction.

[0030] The heat-conducting block 9 includes a base block 10 and side blocks 11 disposed on both sides of the base block 10. The base block 10 is located at the bottom of the reaction chamber 15, and the side blocks 11 are located on the sides of the reaction chamber 15. The design of the base block 10 and the side blocks 11 ensures that both the bottom and sides of the reaction chamber 15 can be heated, further increasing the temperature uniformity within the reaction chamber 15. At the same time, the side blocks 11 can limit the position of the heat-conducting block 9.

[0031] The working electrode 4, reference electrode 5, and counter electrode 6 are horizontally inserted into the reaction chamber 15 from three sides of the cell body 1. All three electrodes are sealed to the reaction chamber 15. The side-insertion of these three electrodes into the reaction chamber 15 prevents obstruction of the laser path, avoiding interference with Raman signal acquisition, while ensuring a compact overall reaction cell structure. Sealing rings 19 are provided at the connections between the three electrodes and the cell body to achieve a sealed connection. The side-insertion installation method facilitates easy assembly and disassembly, making it convenient to use.

[0032] The working electrode 4 is an L-shaped glassy carbon electrode, the reference electrode 5 is a silver chloride electrode, and the counter electrode 6 is a platinum wire ring electrode. The observation position 16 of the L-shaped glassy carbon electrode has a diameter of 5 mm and a surface roughness Ra < 10 nm. The platinum wire ring electrode is arranged in a spiral shape, which increases the effective reaction area by 2-3 times compared to the traditional straight shape.

[0033] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A three-electrode electrochemical Raman universal detection reaction cell, characterized in that: It includes a pool body, a pool cover that is sealed to the pool body, and a heating assembly located at the bottom of the pool body; A reaction chamber is provided in the middle of the pool body, and a working electrode, a reference electrode, and a counter electrode are provided on the pool body and inserted into the reaction chamber; an observation port is provided on the pool cover, and a quartz window is provided between the pool cover and the pool body, with the quartz window being positioned opposite to the observation position on the working electrode; The heating assembly includes a heating element, a heat-conducting block, and an encapsulation shell for encapsulating the heating element and the heat-conducting block at the bottom of the pool body. The heat-conducting block is in contact with the bottom of the pool body and is located in the external region of the reaction chamber.

2. The three-electrode electrochemical Raman combined detection reaction cell according to claim 1, characterized in that: The bottom of the pool body is provided with a heat-conducting block mounting groove, and the heat-conducting block is embedded in the heat-conducting block mounting groove. The outer casing is provided with a heating element mounting groove, and the heating element is embedded in the heating element mounting groove.

3. The three-electrode electrochemical Raman combined detection reaction cell according to claim 1, characterized in that: The heat-conducting block includes a base block and side blocks disposed on both sides of the base block. The base block is located at the bottom of the reaction chamber, and the side blocks are located on the sides of the reaction chamber.

4. The three-electrode electrochemical Raman combined detection reaction cell according to claim 1, characterized in that: The heating element is a ceramic heating element, and the heat-conducting block is a copper heat-conducting block.

5. The three-electrode electrochemical Raman universal detection reaction cell according to claim 1, characterized in that: The volume of the reaction chamber is 4.8-5.2 ml.

6. The three-electrode electrochemical Raman universal detection reaction cell according to claim 1, characterized in that: The working electrode, reference electrode, and counter electrode are inserted horizontally into the reaction chamber from three sides of the pool body.

7. The three-electrode electrochemical Raman combined detection reaction cell according to claim 1, characterized in that: The working electrode, reference electrode, and counter electrode are all sealed and connected to the reaction chamber of the pool.

8. The three-electrode electrochemical Raman universal detection reaction cell according to claim 1, characterized in that: The working electrode is an L-shaped glassy carbon electrode, the reference electrode is a silver chloride electrode, and the counter electrode is a platinum wire ring electrode.

9. A three-electrode electrochemical Raman universal detection reaction cell according to claim 1, characterized in that: The pool body is also provided with an electrolyte inlet channel that communicates with the reaction chamber.

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