SxCoOOH electrocatalyst, preparation method and application thereof

An electrocatalyst and sodium sulfide technology, which is applied in the direction of electrodes, electrolytic components, electrolytic processes, etc., can solve the problems of inability to meet industrial requirements and high price of precious metal catalysts, and achieve the effect of improving OER performance, simple composition, and good catalytic stability

Active Publication Date: 2022-04-29
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metal catalyst RuO 2 and IrO 2 It has good catalytic activity for OER, but it still needs an overpotential of about 200mV (acidic medium) or 300mV (basic medium) to generate a large current density (>10mA cm -2 ), and the high price of noble metal catalysts cannot meet the requirements of industrialization

Method used

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  • SxCoOOH electrocatalyst, preparation method and application thereof
  • SxCoOOH electrocatalyst, preparation method and application thereof
  • SxCoOOH electrocatalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] S x The specific preparation steps of CoOOH-1 are as follows:

[0027] Weigh 1.8mmol cobalt acetate, put 105mg ascorbic acid into a round bottom flask, add 95mL H 2O, stirred at 25°C for 30min, then slowly added dropwise a mixture of 100mg sodium hydroxide, 5mg sodium sulfide and 5mL H 2 Mixed solution A composed of O. (Since there is S in this mixed solution A 2- , which is easily absorbed by the O in the air 2 Oxidation must be prepared and used immediately, too early preparation may cause errors). Continue to stir for 30min, then slowly raise the temperature to 80°C, then keep stirring for 2h, collect the product, wash with absolute ethanol and H 2 The samples were obtained after O washing and drying.

Embodiment 2

[0029] S x The specific preparation steps of CoOOH-2 are as follows:

[0030] Weigh 1.8mmol cobalt acetate, put 105mg ascorbic acid into a round bottom flask, add 95mL H 2 O, stirred at 25°C for 30min, then slowly added dropwise a mixture of 100mg sodium hydroxide, 10mg sodium sulfide and 5mL H 2 Mixed solution A composed of O. (Since there is S in this mixed solution A 2- , which is easily absorbed by the O in the air 2 Oxidation must be prepared and used immediately, too early preparation may cause errors). Continue to stir for 30min, then slowly raise the temperature to 80°C, then keep stirring for 2h, collect the product, wash with absolute ethanol and H 2 The samples were obtained after O washing and drying.

Embodiment 3

[0032] S x The specific preparation steps of CoOOH-3 are as follows:

[0033] Weigh 1.8mmol cobalt acetate, put 105mg ascorbic acid into a round bottom flask, add 95mL H 2 O, stirred at 25°C for 30min, then slowly added dropwise a mixture of 100mg sodium hydroxide, 15mg sodium sulfide and 5mL H 2 Mixed solution A composed of O. (Since there is S in this mixed solution A 2- , which is easily absorbed by the O in the air 2 Oxidation must be prepared and used immediately, too early preparation may cause errors). Continue to stir for 30min, then slowly raise the temperature to 80°C, then keep stirring for 2h, collect the product, wash with absolute ethanol and H 2 The samples were obtained after O washing and drying.

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Abstract

The invention relates to the technical field of electrocatalytic decomposition, in particular to a SxCoOOH electrocatalyst, a preparation method and application thereof, a redox balance system is established, the components of the balance system comprise H2O, Na2S and ascorbic acid, and the microtopography structure and the electronic structure of CoOOH can be effectively regulated and controlled at a certain temperature. The regulated and controlled product SxCoOOH has a sheet structure with grooves, and the grooves are square or oval and are different in depth, so that a multi-layer structure is formed. Na2S in the equilibrium system has reducibility and can effectively adjust the electronic structure of CoOOH, in the adjusted product SxCoOOH, sulfur exists in an oxidation state, the valence state of cobalt is mainly + 2, meanwhile, a small amount of cobalt in other oxidation states exists, and the OER performance of SxCoOOH is greatly improved compared with that of CoOOH.

Description

technical field [0001] The invention relates to the technical field of electrocatalytic decomposition, in particular to a S x CoOOH electrocatalyst, preparation method and application thereof. Background technique [0002] Renewable energy, including solar energy and wind energy, is green and low-carbon energy, which is of great significance for solving energy shortages, protecting the ecological environment, coping with climate change, and achieving sustainable economic and social development. However, some renewable energy sources are cyclical or intermittent and cannot provide energy continuously. For example, the use of solar or wind power to generate electricity cannot generate electricity at night when there is no sunlight or no wind. Therefore, it is necessary to store these electric energy and release them when needed. h 2 is an ideal energy carrier because H 2 High energy density, heat energy can be obtained through combustion or power generation through fuel ce...

Claims

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Application Information

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IPC IPC(8): C25B11/065C25B11/075C25B1/04
CPCC25B11/065C25B11/075C25B1/04
Inventor 陈国昌何子成杜金玥吴胜华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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