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Preparation method of copper-cobalt oxygen evolution catalyst

A catalyst and oxygen evolution technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of low electrolysis efficiency, slow response, high internal resistance, etc., and achieve the effect of reducing energy consumption, long life and low cost

Active Publication Date: 2021-11-16
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP +1
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Problems solved by technology

Alkaline water electrolysis technology has been commercialized at present, but its electrolysis efficiency is low due to the high internal resistance and slow response of the system

Method used

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  • Preparation method of copper-cobalt oxygen evolution catalyst
  • Preparation method of copper-cobalt oxygen evolution catalyst
  • Preparation method of copper-cobalt oxygen evolution catalyst

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preparation example Construction

[0031] The embodiment of the present invention provides a kind of preparation method of copper-cobalt oxygen evolution catalyst, such as Figure 1 to Figure 6 shown, including the following steps:

[0032] Step 1: Dissolving cobalt sulfate heptahydrate and anhydrous copper sulfate in water to prepare a precursor bulk solution, wherein the concentration of cobalt sulfate heptahydrate is 40-100 g / L, and the concentration of anhydrous copper sulfate is 20-60 g / L L;

[0033] Step 2: Under the condition of keeping stirring the solution, add potassium hydroxide solution with a concentration of 1-6 mol / L into the solution drop by drop, adjust the pH value of the solution to 8.5-12, and control the reaction temperature of the solution to 20-60 °C, the reaction time is 2-6 hours, and after the reaction is completed, the solution is allowed to stand for 6-16 hours;

[0034] Step 3: vacuum filter and wash the solution, wash the obtained filter cake with water and dry it in an oven to o...

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Abstract

The embodiment of the invention discloses a preparation method of a copper-cobalt oxygen evolution catalyst. The preparation method comprises the steps of: dissolving cobalt sulfate heptahydrate with the concentration of 40-100g / L and anhydrous cupric sulfate with the concentration of 20-60g / L into water to prepare a precursor body solution; dropwise adding a potassium hydroxide solution with the concentration of 1-6 mol / L into the solution while stirring the solution, adjusting the pH value of the solution to 8.5-12, controlling the reaction temperature of the solution to be 20-60 DEG C and the reaction time to be 2-6 hours, and standing the solution for 6-16 hours after the reaction is completed; vacuum-filtering and washing the solution, washing the obtained filter cake with water, and drying the filter cake in a drying oven with the drying temperature set to be 60-120 DEG C and the drying time set to be 6-15 hours to obtain a precursor material; grinding the precursor material into powder, and sintering the powder in a sintering furnace under the sintering conditions that the heating rate is 2-5 DEG C / min, the sintering temperature is 300-450 DEG C and the sintering time is 2-5 hours; and after sintering, cooling to room temperature to obtain the copper-cobalt oxygen evolution catalyst with high activity, high stability and low cost.

Description

technical field [0001] The invention relates to the technical fields of alkaline electrolyzed water, anion exchange membrane electrolyzed water, etc., in particular to a preparation method of a copper-cobalt oxygen evolution catalyst. Background technique [0002] Compared with other hydrogen production technologies, water electrolysis hydrogen production technology has the characteristics of simple process, high hydrogen purity, and environmental friendliness. Alkaline water electrolysis technology has been commercially applied, but its electrolysis efficiency is low due to the high internal resistance and slow response of the system. Anion exchange membrane (AEM) water electrolysis technology uses alkaline polymer electrolyte membrane as a new type of diaphragm material, uses non-precious metal catalysts as hydrogen evolution and oxygen evolution catalytic materials, has the advantages of high current density and low concentration of lye, and can greatly reduce the size of...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B1/04
CPCC25B11/091C25B1/04Y02E60/36
Inventor 吴笑雨郝珍王杰鹏李朋喜宋金磊岳飞飞魏海兴孙岳涛张斯宇王桂洲
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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