Electrocatalytic reaction testing device for high-throughput rapid sample screening

Abstract

An electro-catalytic reaction testing device for high-throughput rapid screening of samples relates to the technical field of electro-catalytic reaction testing devices, and comprises a Pt plate, a main body, a counter electrode and a reference electrode, the Pt plate and the main body are sequentially arranged from bottom to top, the Pt plate is provided with a groove, the main body is provided with a hollow cavity correspondingly communicated with the groove, the groove is used for placing a catalyst, and the hollow cavity is used for placing liquid; the counter electrode and the reference electrode are arranged in the hollow cavity; and the Pt plate is conductively connected with the working electrode wire. And the electrochemical performance test can be performed on different samples under the same test condition, so that the purpose of efficiently and accurately preliminarily screening different catalysts can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrocatalytic reaction testing devices, in particular to an electrocatalytic reaction testing device for high-throughput rapid screening of samples. Background Art

[0002] In the context of dual carbon emissions, the development of new energy sources is urgent, and renewable electricity plays a vital role in defossilizing energy. Hydrogen, one of the world's most promising clean energy sources of the 21st century, offers advantages such as high energy density and the absence of polluting combustion products. In particular, green hydrogen produced by water electrolysis is not only highly pure but also emits no additional carbon. Furthermore, the development of wind, solar, and tidal power generation has enabled the integration of water electrolysis with sustainable energy sources. Furthermore, water electrolysis is particularly well-suited to utilizing intermittent energy sources. Electrocatalytic water splitting coupled with hydrogen and oxygen evolution reactions offers a promising solution for sustainable energy conversion and storage. Therefore, water electrolysis technology has become a promising approach that can both address the energy crisis and achieve sustainable economic development.

[0003] The overall water electrolysis reaction consists of two half-reactions: the oxygen evolution reaction (OER) at the anode and the hydrogen evolution reaction (HER) at the cathode. An effective water electrolysis catalyst can significantly reduce the overpotential required for HER and OER, thereby reducing energy consumption. However, the anode oxygen evolution reaction is one of the important half-reactions in the water electrolysis process. However, since this reaction is widely believed to be a four-electron transfer process, the high overpotential and slow reaction kinetics seriously restrict the energy conversion efficiency of the water electrolysis process. Currently, due to the excessively high overpotential, only 4% of water is successfully decomposed. Therefore, the innovation of low-cost, high-performance and durable catalysts is a current research hotspot.

[0004] In recent years, one of the main ways to develop new catalysts is element doping. By adjusting the content of a certain element added to a substrate, the optimal catalyst element ratio can be screened out through the control variable method. For example, perovskite oxides have the advantages of flexible composition and easy adjustment of the electronic structure of the material, making them a highly promising OER catalyst and providing an efficient method for the production of oxygen energy. However, due to the rapid increase in its composition space, the development of efficient perovskite electrocatalysts faces challenges such as huge workload. Existing catalyst electrochemical testing equipment can only test one sample at a time, and because the test conditions of different catalysts cannot be as similar as possible, not only is the efficiency low, but it may also lead to increased errors between different tests. How to minimize test errors and improve test efficiency deserves certain attention. Summary of the Invention

[0005] The purpose of the present utility model is to solve the above-mentioned problem that the testing device in the prior art cannot meet the requirements of testing multiple samples at one time while keeping the same set of test conditions as similar as possible, and to provide an electrocatalytic reaction testing device for high-throughput rapid screening of samples, thereby achieving the purpose of high efficiency and accuracy.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A device for testing electrocatalytic reactions for high-throughput rapid screening of samples comprises a Pt plate, a main body, a counter electrode, and a reference electrode. The Pt plate and the main body are arranged in sequence from bottom to top, the Pt plate is provided with a groove, and the main body is provided with a hollow cavity corresponding to the groove. The groove is used to place a catalyst, and the hollow cavity is used to place a liquid. The counter electrode and the reference electrode are arranged in the hollow cavity. The Pt plate is conductively connected to the working electrode line.

[0008] The utility model also includes a conductive member, which is clamped between the Pt plate and the main body and extends to the outside to conductively connect the Pt plate and the working electrode line; or, the Pt plate is provided with a connecting portion extending outward, and the connecting portion is conductively connected to the working electrode line.

[0009] The utility model also includes an electrode fixing cover, which is arranged on the hollow cavity and is provided with two fixing holes for inserting the counter electrode and the reference electrode.

[0010] The utility model also includes a sealing ring, which is arranged in the groove.

[0011] The conductive member is preferably a Cu conductive tape, but other conductive members such as a Cu sheet may also be used.

[0012] The utility model also includes a base, which is arranged below the Pt plate.

[0013] The Pt plate and the main body are connected by bolts.

[0014] The Pt plate, the main body and the base are connected by bolts; or the main body and the base are connected by bolts, and the Pt plate is clamped and fixed therein.

[0015] The grooves and hollow cavities are provided in several groups.

[0016] The application of the electrocatalytic reaction testing device for high-throughput rapid screening of samples is used for electrocatalytic reactions in a three-electrode system.

[0017] Specifically, different catalysts are placed in the grooves of the Pt plate to perform electrochemical performance tests under the same test conditions, thereby achieving the purpose of preliminary screening of different catalysts.

[0018] Compared with the existing technology, the beneficial effects achieved by the technical solution of the utility model are:

[0019] 1. Improved testing efficiency: The testing device provided by this utility model can perform electrochemical performance tests on multiple catalyst samples, greatly improving testing efficiency. Compared with traditional single-sample testing devices, this device can test multiple samples, significantly reducing the time and labor costs required for testing.

[0020] 2. Ensure the consistency of test conditions: The device of this utility model has a sophisticated structure, such as the one-to-one correspondence between the grooves on the Pt plate and the hollow cavity in the main body, which ensures that all catalyst samples are tested under the same test conditions, thereby eliminating the errors introduced by different test conditions and improving the accuracy and reliability of the test.

[0021] 3. Reduced costs: The ability to test multiple samples simultaneously reduces the equipment and resource consumption required for testing a single sample, thereby lowering overall testing costs. Furthermore, the efficient screening process helps quickly identify catalysts with excellent performance, reducing the resource investment required for subsequent optimization and validation.

[0022] 4. Promote catalyst research and development: This utility model device is particularly suitable for the initial screening stage of catalysts. It can quickly screen out potential samples from a large number of candidate catalysts, providing strong support for subsequent in-depth research. This not only accelerates the development of new catalysts, but also provides a strong guarantee for the development of new energy technologies.

[0023] 5. Expanding Application Areas: This utility model device is not only suitable for electrocatalytic reactions such as HER and OER, but can also be widely used in other electrocatalytic reaction tests that require a three-electrode system. It has broad applicability and scalability, which will help promote the application and development of electrocatalytic technology in different fields.

[0024] 6. Easy to operate and maintain: The device has a reasonable design, simple structure, and is easy to operate and maintain. The use of components such as the electrode fixing cover and sealing ring improves the sealing and stability of the device. It is also easy to replace and clean, ensuring the continuity and accuracy of the test.

[0025] In summary, the electrocatalytic reaction testing device for high-throughput rapid screening of samples provided by the utility model has shown significant beneficial effects in improving test efficiency, ensuring consistency of test conditions, reducing costs, promoting catalyst research and development, expanding application fields, and facilitating operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the device in Example 1 of the present utility model;

[0027] Figure 2 This is a schematic diagram of the cross-sectional exploded structure of the device of Example 1 of the present utility model;

[0028] Figure 3 This is a graph of LSV experimental data of the device of Example 1 of the utility model used for electrolysis of water.

[0029] Figure numerals: base 1, Pt plate 2, main body 3, electrode fixing cover 4, counter electrode 5, reference electrode 6, conductive member 7, screw hole 8, sealing ring 9, hollow cavity 10, groove 11. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0031] Example 1

[0032] like Figures 1-2 As shown, this embodiment is an electrocatalytic reaction testing device for high-throughput rapid screening of samples, comprising a base 1, a Pt plate 2, a main body 3, an electrode fixing cover 4, a counter electrode 5, a reference electrode 6, a conductive member 7, and a sealing ring 9;

[0033] The base 1, Pt plate 2 and main body 3 are arranged in sequence from bottom to top, the base 1 is used to support the Pt plate 2 and other components; the Pt plate 2 is provided with a plurality of grooves 11, the main body 3 is provided with a hollow cavity 10 corresponding to the grooves 11, the grooves 11 are used to place the catalyst sample, and the hollow cavity 10 is used to contain the electrolyte and support the electrode fixing cover 4;

[0034] The electrode fixing cover 4 is provided on the hollow cavity 10 to fix the electrode to prevent it from moving. Specifically, the electrode fixing cover 4 is provided with two fixing holes for inserting the counter electrode 5 and the reference electrode 6; one end of the counter electrode 5 and the reference electrode 6 passes through the electrode fixing cover 4 and extends into the hollow cavity 10, and the other ends of the counter electrode 5 and the reference electrode 6 are respectively connected to the corresponding reference electrode wire and the counter electrode wire;

[0035] The conductive member 7 is sandwiched between the Pt plate 2 and the main body 3 and extends to the outside for connecting the working electrode wire. In this embodiment, the conductive member 7 is a Cu conductive tape.

[0036] In other embodiments, the Pt plate may be extended outward to provide a connecting portion, which is conductively connected to the working electrode line.

[0037] The Pt plate 2, main body 3, and base 1 are provided with corresponding screw holes 8 and are tightly connected by bolts. The sealing ring 9 is a rubber sealing ring, which is located in the groove 11 to prevent electrolyte leakage. The main body 3 and base 1 are made of polytetrafluoroethylene.

[0038] In this embodiment, there are 16 groups of grooves 11 and hollow cavities 10 , which can accommodate 16 samples, and 16 electrode fixing covers 4 are provided for fixing 16 groups of reference electrodes 6 and counter electrodes 5 .

[0039] This embodiment describes an electrocatalytic reaction testing device for high-throughput rapid sample screening, specifically designed for electrocatalytic reactions in a three-electrode system. After the catalyst sample, acting as a working electrode, is physically connected to an electrolyte, a reference electrode, and a counter electrode, the electrodes are then connected to an external instrument via electrode cables to form a circuit, enabling electrochemical catalytic reaction testing of the catalyst sample.

[0040] Specifically, different catalysts are placed in the grooves of the Pt plate to conduct electrochemical performance tests under the same test conditions, thereby achieving the purpose of preliminary screening of different catalysts. In this embodiment, up to 16 different catalysts can be tested at a time. In actual applications, this number can also be changed as needed.

[0041] According to a preferred embodiment of the present invention, the steps of using the above-mentioned testing device to perform an electrocatalytic oxygen evolution reaction test are as follows:

[0042] Step 1: fix the catalyst sample on the groove 11 of the Pt plate 2, fix the Cu conductive tape on the Pt plate 2, and place the sealing ring 9 on the groove 11;

[0043] Step 2: First, place the Pt plate 2 on the base 1, then place the main body 3 on the Pt plate 2, and the three are tightened with bolts;

[0044] Step 3: inject electrolyte into the hollow cavity 10 of the main body 3, insert the reference electrode 6 and the counter electrode 5 into the electrode fixing cover 4 and place them together into the hollow cavity 10;

[0045] Step 4: Connect the working electrode wire with Cu conductive tape, and connect the reference electrode wire and the counter electrode wire to the reference electrode 6 and the counter electrode 5 respectively, and start the electrocatalytic oxygen evolution (OER) test.

[0046] In other embodiments, the main body and the base may be connected by bolts, and the Pt plate may be tightly clamped and fixed therein.

[0047] According to the utility model, the aperture of the electrode fixing cover can be adjusted as needed to realize the application of different electrodes and perform other catalytic reaction tests.

[0048] In this embodiment, eight grooves and hollow cavities were selected to carry different catalysts for water electrolysis catalytic reaction. The electrolyte was 1M KOH, Hg / HgO was used as the reference electrode, the carbon rod was used as the counter electrode, and the experimental temperature was 25°C.

[0049] To convert a reference electrode into a reversible hydrogen standard electrode, use the following formula:

[0050] E RHE =E Hg / HgO +E o Hg / HgO +i×R+0.059×pH

[0051] Among them, E Hg / HgO is the voltage applied relative to the reference electrode during the test, E o Hg / HgO is the standard potential of the reference electrode at room temperature; i is the current density, and R is the resistance of 1 M KOH solution (about 6Ω).

[0052] Figure 3 This is a diagram of LSV experimental test data. Through the above test, the device of the utility model can efficiently test multiple groups of catalyst samples and then screen out catalysts with better performance.

Claims

1. An electrocatalytic reaction testing device for high-throughput rapid screening of samples, characterized by: It includes a Pt plate, a main body, a counter electrode, and a reference electrode; the Pt plate and the main body are arranged in sequence from bottom to top, the Pt plate is provided with a groove, and the main body is provided with a hollow cavity corresponding to the groove. The groove is used to place a catalyst, and the hollow cavity is used to place a liquid; the counter electrode and the reference electrode are arranged in the hollow cavity; the Pt plate is conductively connected to the working electrode line.

2. The electrocatalytic reaction testing device for high-throughput rapid screening of samples according to claim 1, characterized in that: The device also includes a conductive member, which is sandwiched between the Pt plate and the main body and extends to the outside to conductively connect the Pt plate and the working electrode wire.

3. The electrocatalytic reaction testing device for high-throughput rapid screening of samples according to claim 1, characterized in that: The Pt plate is provided with a connecting portion extending outward, and the connecting portion is conductively connected to the working electrode line.

4. The electrocatalytic reaction testing device for high-throughput rapid screening of samples according to claim 1, characterized in that: It also includes an electrode fixing cover, which is arranged on the hollow cavity and has two fixing holes for inserting the counter electrode and the reference electrode.

5. The electrocatalytic reaction testing device for high-throughput rapid screening of samples according to claim 1, characterized in that: It also includes a sealing ring, which is arranged in the groove.

6. The electrocatalytic reaction testing device for high-throughput rapid screening of samples according to claim 1, characterized in that: The device also includes a base, which is arranged below the Pt plate.

7. The electrocatalytic reaction testing device for high-throughput rapid screening of samples according to claim 1, characterized in that: The Pt plate and the main body are connected by bolts.

8. The electrocatalytic reaction testing device for high-throughput rapid screening of samples according to claim 6, characterized in that: The Pt plate, the main body and the base are connected by bolts.

9. The electrocatalytic reaction testing device for high-throughput rapid screening of samples according to claim 6, characterized in that: The main body is connected to the base through bolts, and the Pt plate is clamped and fixed therein.

10. The electrocatalytic reaction testing device for high-throughput rapid screening of samples according to claim 1, characterized in that: The grooves and hollow cavities are provided in several groups.

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