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A self-supporting catalytic hydrogen evolution electrode and its preparation method

A hydrogen evolution electrode, self-supporting technology, applied in the direction of electrode, electrode shape/type, electrolysis components, etc., to achieve the effect of simple preparation process, many active sites, and efficient hydrogen evolution catalytic performance

Active Publication Date: 2020-09-22
安徽清氢能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems existing in the preparation process of the existing electrolytic water hydrogen evolution electrode, the present invention provides a self-supporting catalytic hydrogen evolution electrode and its preparation method. The specific technical scheme is as follows

Method used

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  • A self-supporting catalytic hydrogen evolution electrode and its preparation method
  • A self-supporting catalytic hydrogen evolution electrode and its preparation method
  • A self-supporting catalytic hydrogen evolution electrode and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Step 1: After cleaning the copper mesh with concentrated hydrochloric acid, ethanol and ultrapure water ultrasonically, soak it in 2.5M sodium hydroxide and 0.2M potassium peroxodisulfate aqueous solution for chemical oxidation for 20 minutes.

[0029] Step 2: Put the copper mesh obtained in Step 1 in a muffle furnace, and heat it in an air atmosphere at 180° for 2 hours.

[0030] Step three: use the electrode obtained in step two as the cathode, in 1M sodium sulfate aqueous solution, at 25mA / cm 2 electrochemical reduction at a high current density.

[0031] Step 4: Use the copper mesh obtained in Step 3 as the cathode, and in 1M NaH 2 PO 2 ,1M CH 3 COONa,0.1M CoCl 2 and 1M NH 4 Electrodeposition in an aqueous solution of Cl at a current density of 25mA / cm 2 Conditions, electrodeposition treatment for 90 minutes.

[0032] Step 5: Submerge the electrode obtained in Step 4 in an electrolytic cell filled with 6M sulfuric acid solution, after that, wash it with clean...

Embodiment 2

[0037] Step 1: After cleaning the copper mesh with concentrated hydrochloric acid, ethanol and ultrapure water ultrasonically, soak it in 2.5M sodium hydroxide and 0.2M potassium peroxodisulfate aqueous solution for chemical oxidation for 20 minutes.

[0038] Step 2: Put the copper mesh obtained in Step 1 in a muffle furnace, and heat it in an air atmosphere at 180° for 2 hours.

[0039] Step three: use the electrode obtained in step two as the cathode, in 1M sodium sulfate aqueous solution, at 25mA / cm 2 reduced at a current density.

[0040] Step 4: Use the copper mesh obtained in Step 3 as the cathode, and in 1M NaH 2 PO 2 ,1M CH 3 COONa,0.1M CoCl 2 and 1M NH 4 Electrodeposition in an aqueous solution of Cl, the conditions are 1) the current density is 3mA / cm 2 Electrodeposition treatment for 60 minutes; 2) The current density is 25mA / cm 2 Electrodeposition treatment for 60 minutes; 3) 500mA / cm 2 , Electrodeposition treatment for 60 minutes.

[0041] Step 5: Submerg...

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Abstract

The invention discloses a self-supporting catalytic hydrogen evolution electrode and a preparation method thereof. The method sequentially comprises the following steps: step 1, soaking a metal mesh in a sodium hydroxide water solution of potassium persulfate to carry out chemical oxidation; step 2, heating the metal mesh obtained in the step 1 in an air atmosphere at a temperature of 180 DEG C; step 3, taking the metal mesh obtained in the step 2 as a negative electrode, soaking the metal mesh into a water solution of sodium sulfate, and carrying out electrochemical reduction under a condition of normal temperature, normal pressure and current density of 25 mA / cm<2>; step 4, taking the reduced metal mesh obtained in the step 3 as a negative electrode, soaking the reduced metal mesh in a water solution containing cobalt chloride, ammonium chloride, sodium hypophosphite and sodium acetate, and carrying out electrodeposition treatment at a condition of normal temperature, normal pressureand current density of 3-500 mA / cm<2>; and step 5, soaking the electrode obtained in the step 4 in an acidic water solution, then cleaning the surface by using deionized water, and carrying out drying to obtain a finished electrode. The electrode is a catalytic electrode with a core-shell nanowire structure.

Description

technical field [0001] The invention belongs to the technical field of producing hydrogen by electrolyzing water, and relates to a self-supporting catalytic hydrogen evolution electrode and a preparation method thereof. Background technique [0002] Hydrogen has the characteristics of high energy density and non-polluting reaction products, and is considered to be an ideal energy carrier in the future. At present, the production of hydrogen mainly relies on the steam reforming process of fossil fuels such as coal and natural gas, which produces a large amount of pollutants such as carbon dioxide and sulfur dioxide. Hydrogen production by electrolysis of water is considered to be one of the most promising technologies in the future because its raw material is water and the preparation process is non-polluting. However, the high energy consumption of electrolyzed water to produce hydrogen seriously restricts the large-scale application of electrolyzed water technology. The u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/03C25B11/06
CPCC25B1/04C25B11/031C25B11/051Y02E60/36
Inventor 王保国王培灿
Owner 安徽清氢能源科技有限公司