Testing device for electrodes of hydrogen production electrolytic cell

Abstract

The utility model provides a testing device for an electrode of a hydrogen production electrolytic tank, which comprises an electrolytic tank for testing, a first electrode and a second electrode, the test electrode is installed on the electrolytic tank for testing, a test sample is fixed on the test electrode, the test sample is in a convex shape and is provided with an effective test area and a fixed area, and the area of the effective test area is larger than that of the fixed area; the counter electrode is mounted on the electrolytic tank for testing; and the reference electrode is arranged on the electrolytic tank for testing. According to the utility model, the test evaluation result of the electrolytic cell electrode can be intuitively obtained, the electrolytic cell electrode with excellent performance can be preferably selected, and reliable reference is provided for improvement of the electrolytic cell electrode or selection of the electrolytic cell electrode in the water electrolysis process.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production by electrolysis of water, in particular to a testing device for electrodes of a hydrogen production electrolytic cell. Background Art

[0002] Hydrogen energy is considered to be a very promising clean energy source due to its environmental friendliness, high energy density, zero carbon emissions and recyclability. During the water electrolysis process, hydrogen and oxygen in water molecules are released on the anode electrolyzer electrode and the cathode electrolyzer electrode, respectively, to form hydrogen and oxygen. Among them, different catalysts are loaded on the electrolyzer electrodes to accelerate the electrolysis of water. However, during the electrolysis process, the different properties of the electrolyzer electrodes have a great impact on the electrolysis of water, which often brings great difficulties to the design stage of the electrolyzer electrodes and the electrolysis process. Therefore, the industry urgently needs a very objective, convenient and effective method to quickly conduct a comprehensive evaluation and optimization of the electrolyzer electrodes. Utility Model Content

[0003] The utility model provides a testing device for hydrogen production electrolytic cell electrodes, which can effectively test hydrogen production electrolytic cell electrodes and provide a reliability reference for improving electrolytic cell electrodes or selecting electrolytic cell electrodes in the process of water electrolysis.

[0004] In order to solve the above technical problems, the present invention provides a test device for hydrogen production electrolyzer electrodes, comprising:

[0005] a test electrolytic cell filled with electrolyte solution;

[0006] A test electrode is mounted on the test electrolytic cell, wherein the test sample is fixed on the test electrode, the test sample is in a convex shape and has an effective test area and a fixed area, and the area of the effective test area is larger than that of the fixed area;

[0007] a counter electrode, mounted on the test electrolytic cell; and

[0008] The reference electrode is installed on the test electrolytic cell.

[0009] In one embodiment, the ratio of the width of the effective test area to the width of the fixed area is (1.8-2.2):1, for example.

[0010] In one embodiment, the ratio of the length of the effective test area to the length of the fixed area is (1-1.2):1, for example.

[0011] In one embodiment, the width of the effective test area is 8 mm to 15 nm.

[0012] In one embodiment, the length of the effective test area is 8 mm to 15 nm.

[0013] In one embodiment, the width of the fixed region is 5 mm to 12 nm.

[0014] In one embodiment, the length of the fixed region is 5 mm to 12 nm.

[0015] In one embodiment, when acquiring performance data, the reference electrode is located between the test electrode and the counter electrode.

[0016] In one embodiment, when performing a hydrogen evolution reaction test, the counter electrode is a platinum electrode or a nickel electrode, and the reference electrode is a mercury or mercury oxide electrode.

[0017] In one embodiment, when performing an oxygen evolution reaction test, the counter electrode is a platinum sheet electrode or a carbon rod electrode, and the reference electrode is a mercury or mercury oxide electrode.

[0018] In summary, the present invention provides a testing device for hydrogen production electrolyzer electrodes, which can effectively and stably perform electrode testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 Schematic diagram of a testing device in one embodiment of the present invention.

[0021] Figure 2 Schematic diagram of the electrolytic cell electrodes in one embodiment of the present invention. DETAILED DESCRIPTION

[0022] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] See also Figure 1 As shown, in one embodiment of the present invention, the electrolytic cell electrode is, for example, an anode electrode or a cathode electrode, and the electrolytic cell electrode includes, for example, a conductive substrate and a catalyst layer supported on the conductive substrate. Among them, the conductive substrate includes, for example, nickel foam, nickel mesh, carbon cloth, steel or titanium alloy, etc. The conductive substrate can also be a metal material such as iron, stainless steel, aluminum or titanium, on the surface of which a nickel or nickel-based alloy coating is applied by plating, etc. The catalyst layer selects different catalysts according to the polarity of the electrolytic cell electrode to meet the catalytic needs of the anode or cathode. In this application, the conductive substrate and / or the catalyst layer are, for example, materials to be evaluated to evaluate the performance of the formed electrolytic cell electrode and provide a reliability reference for the research or use of the electrolytic cell electrode.

[0025] See also Figures 1 to 2 As shown, in one embodiment of the present invention, the test device includes, for example, a test electrode 10 to be evaluated, a reference electrode 20, and a counter electrode 30, wherein the reference electrode 20 is located between the test electrode 10 and the counter electrode 30, and the test electrode 10 to be evaluated serves as the test electrode. The test electrode 10, the reference electrode 20, and the counter electrode 30 are placed in a test electrolytic cell 40, in which an electrolyte solution 50 is contained, and the electrolyte solution 50 immerses the test electrode 10, the reference electrode 20, and the counter electrode 30. In this embodiment, the test electrolytic cell 40 is, for example, a non-conductive container such as a glass that does not react with the electrolyte solution 50. The reference electrode 20 can be used to respectively test the potential of the positive electrode and the negative electrode relative to the reference electrode, and their potential changes under different test conditions. Through the reference electrode, the large error in the electrode potential caused by the polarization current can be eliminated, thereby improving the accuracy of the obtained data and thus improving the reliability of the evaluation results.

[0026] See also Figure 2As shown, in one embodiment of the present invention, a test electrode 10 is installed on the test electrolytic cell, wherein the test sample is fixed on the test electrode. The test sample can be in a convex shape and is provided with an effective test area and a fixed area, wherein the area of the effective test area is larger than the fixed area. The test sample of the test electrode 10 includes an effective test area 101 and a fixed area 102. The effective test area 101 and the fixed area 102 are obtained, for example, by cutting a substrate. The effective test area 101 is used for performance testing, and the fixed area 102 is used for electrode clamp fixation to facilitate assembly. The effective test area 101 and the fixed area 102 are, for example, rectangular, and the central axes of the effective test area 101 and the fixed area 102 coincide. In one embodiment of the present application, the ratio of the width D1 of the effective test area 101 to the width D2 of the fixed area 102 is, for example, (1.8 to 2.2):1, and the ratio of the length L1 of the effective test area 101 to the length L2 of the fixed area 102 is, for example, (1 to 1.2):1. In a specific embodiment of the present application, the width D1 of the effective test area 101 is, for example, 8 mm to 15 nm, and the length L1 of the effective test area 101 is, for example, 8 mm to 15 nm.

[0027] See also Figures 1 to 2 As shown, in one embodiment of the present invention, during the test, the electrolyte solution 50 used includes, for example, water and an alkaline substance, wherein the resistivity of the water is not, for example, greater than or equal to 2 MΩ·cm, the alkaline substance is, for example, potassium hydroxide (KOH), and the grade of potassium hydroxide is analytically pure and the content is greater than or equal to 85%, and the mass fraction of the alkaline substance in the electrolyte solution 50 is, for example, 20% to 30%.

[0028] See also Figures 1 to 2As shown, in one embodiment of the present invention, the polarization performance, catalytic performance, stability, ion corrosion performance, anti-ion precipitation interference performance, anti-fluctuation performance and Faraday efficiency of the hydrogen production electrolyzer electrode can be evaluated. In the present application, when obtaining the polarization curve of the electrolyzer electrode, the cathode hydrogen evolution reaction (HER) and the anode oxygen evolution reaction (OER) test are first performed. Wherein, the cathode hydrogen evolution reaction is to decompose water by an electrochemical method, and the water molecules are reduced to produce hydrogen on the cathode side. The anode oxygen evolution reaction is to decompose water by an electrochemical method, and the water molecules are oxidized to produce oxygen on the anode side. When the cathode hydrogen evolution reaction is performed, the test electrode 10 is used as the test electrode, and the reference electrode is, for example, a mercury / mercury oxide electrode, etc., and the counter electrode 30 is, for example, a platinum sheet / nickel sheet electrode, etc. When the anode oxygen evolution reaction is performed, the test electrode 10 is used as the test electrode, and the reference electrode is, for example, a mercury / mercury oxide electrode, etc., and the counter electrode 30 is, for example, a platinum sheet electrode / carbon rod, etc. The electrode is mounted on an electrode holder, and then the electrode is connected to an electrochemical workstation, for example, via the electrode holder.

[0029] In one embodiment, the ratio of the width of the effective test area to the width of the fixed area is (1.8-2.2):1, for example.

[0030] In one embodiment, the ratio of the length of the effective test area to the length of the fixed area is (1-1.2):1, for example.

[0031] In one embodiment, the width of the effective test area is 8 mm to 15 nm.

[0032] In one embodiment, the length of the effective test area is 8 mm to 15 nm.

[0033] In one embodiment, the width of the fixed region is 5 mm to 12 nm.

[0034] In one embodiment, the length of the fixed region is 5 mm to 12 nm.

[0035] In one embodiment, when acquiring performance data, the reference electrode is located between the test electrode and the counter electrode.

[0036] In one embodiment, when performing a hydrogen evolution reaction test, the counter electrode is a platinum electrode or a nickel electrode, and the reference electrode is a mercury or mercury oxide electrode.

[0037] In one embodiment, when performing an oxygen evolution reaction test, the counter electrode is a platinum sheet electrode or a carbon rod electrode, and the reference electrode is a mercury or mercury oxide electrode.

[0038] In summary, the utility model proposes a testing device for hydrogen production electrolyzer electrodes. By obtaining multiple performance index data of the electrolyzer electrodes, each energy index data can be evaluated, and the performance index data can be comprehensively evaluated. Then, the multiple electrolyzer electrodes are divided into recommended usage levels according to the evaluation results. The evaluation results of multiple electrolyzer electrodes can be obtained intuitively. According to the evaluation results, electrolyzer electrodes with excellent performance can be selected, providing a reliability reference for the improvement of electrolyzer electrodes or the selection of electrolyzer electrodes in the water electrolysis process.

[0039] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A test device for hydrogen production electrolyzer electrodes, characterized in that: include: a test electrolytic cell filled with electrolyte solution; A test electrode is mounted on the test electrolytic cell, wherein the test sample is fixed on the test electrode, the test sample is in a convex shape and has an effective test area and a fixed area, and the area of the effective test area is larger than that of the fixed area; a counter electrode, mounted on the test electrolytic cell; as well as The reference electrode is installed on the test electrolytic cell.

2. The test device for hydrogen production electrolyzer electrodes according to claim 1, characterized in that: The ratio of the width of the effective test area to the width of the fixed area is, for example, (1.8-2.2):

1.

3. The testing device for hydrogen production electrolyzer electrodes according to claim 1, characterized in that: The ratio of the length of the effective test area to the length of the fixed area is, for example, (1-1.2):

1.

4. The testing device for hydrogen production electrolyzer electrodes according to claim 1, characterized in that: The width of the effective test area is 8 mm to 15 nm.

5. The testing device for hydrogen production electrolyzer electrodes according to claim 1, characterized in that: The length of the effective test area is 8 mm to 15 nm.

6. The testing device for hydrogen production electrolyzer electrodes according to claim 1, characterized in that: The width of the fixed area is 5 mm to 12 nm.

7. The testing device for hydrogen production electrolyzer electrodes according to claim 1, characterized in that: The length of the fixed region is 5 mm to 12 nm.

8. The testing device for hydrogen production electrolyzer electrodes according to claim 1, characterized in that: When acquiring performance data, the reference electrode is located between the test electrode and the counter electrode.

9. The testing device for hydrogen production electrolyzer electrodes according to claim 1, characterized in that: When conducting a hydrogen evolution reaction test, the counter electrode is a platinum sheet electrode or a nickel sheet electrode, and the reference electrode is a mercury or mercury oxide electrode.

10. The testing device for hydrogen production electrolyzer electrodes according to claim 1, characterized in that: When performing an oxygen evolution reaction test, the counter electrode is a platinum sheet electrode or a carbon rod electrode, and the reference electrode is a mercury or mercury oxide electrode.

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