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Water decomposition catalyst and preparation method and application thereof

A catalyst and water technology, applied in the field of electrochemical catalysis, can solve the problems of low reserves, high cost, limited large-scale application, etc., and achieve the effects of high catalytic activity, high stability, and excellent electrocatalytic water splitting performance.

Active Publication Date: 2022-08-05
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

HER in the electrocatalytic water splitting process is a two-electron transfer reaction, while OER is a four-electron transfer reaction, which is a slow kinetic step. Although noble metals Ir, Ru, and Pt are considered to be high-performance OER catalysts, their high cost and low reserves Limits large-scale application

Method used

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  • Water decomposition catalyst and preparation method and application thereof
  • Water decomposition catalyst and preparation method and application thereof
  • Water decomposition catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Example 1 Preparation process of water splitting catalyst 0.053NiO / NiS

[0064] 1) Cut the carbon cloth according to the size of 2cm x 2cm, put the cut carbon cloth into ethanol for ultrasonic 15min, wash it with ethanol for several times after taking it out, place the carbon cloth in a beaker, add concentrated nitric acid until the carbon cloth has passed, Violent reaction produces reddish-brown NO 2 , to NO 2 Wash the carbon cloth with a large amount of ultrapure water, put it into ultrapure water for ultrasound, then put it into ethanol for ultrasound, repeat the cleaning three times, and then store it in ultrapure water;

[0065] 2) Arrange the obtained carbon on the electrode clip as the working electrode, the platinum sheet electrode as the counter electrode, the Ag / AgCl electrode as the reference electrode, and 20ml of 0.1M nickel nitrate solution as the electrode solution, using electrochemical deposition method at -1V , electrodeposited carbon cloth for 20 mi...

Embodiment 2

[0069] Example 2 Preparation process of water splitting catalyst 0.163NiO / NiS

[0070] 1) Cut the carbon cloth according to the size of 2cm x 2cm, put the cut carbon cloth into ethanol for ultrasonic 15min, wash it with ethanol for several times after taking it out, place the carbon cloth in a beaker, add concentrated nitric acid until the carbon cloth has passed, Violent reaction produces reddish-brown NO 2 , to NO 2 Wash the carbon cloth with a large amount of ultrapure water, put it into ultrapure water for ultrasound, then put it into ethanol for ultrasound, repeat the cleaning three times, and then store it in ultrapure water;

[0071] 2) Arrange the obtained carbon on the electrode clip as the working electrode, the platinum sheet electrode as the counter electrode, the Ag / AgCl electrode as the reference electrode, and 20ml of 0.1M nickel nitrate solution as the electrode solution, using electrochemical deposition method at -1V , electrodeposited carbon cloth for 20 mi...

Embodiment 3

[0074] Example 3 Preparation process of water splitting catalyst 0.471NiO / NiS

[0075] 1) Cut the carbon cloth according to the size of 2cm x 2cm, put the cut carbon cloth into ethanol for ultrasonic 15min, wash it with ethanol for several times after taking it out, place the carbon cloth in a beaker, add concentrated nitric acid until the carbon cloth has passed, Violent reaction produces reddish-brown NO 2 , to NO 2 Wash the carbon cloth with a large amount of ultrapure water, put it in ultrapure water for 15 minutes, then put it in ethanol for 15 minutes, repeat the cleaning three times, and then store it in ultrapure water;

[0076] 2) Arrange the obtained carbon on the electrode clip as the working electrode, the platinum sheet electrode as the counter electrode, the Ag / AgCl electrode as the reference electrode, and 20ml of 0.1M nickel nitrate solution as the electrode solution, using electrochemical deposition method at -1V , nickel hydroxide was obtained by electrodep...

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Abstract

The invention provides a water decomposition catalyst as well as a preparation method and application thereof. The water decomposition catalyst provided by the invention comprises nickel oxide and nickel sulfide. The water decomposition catalyst disclosed by the invention has the advantages of high catalytic activity and high stability, so that the water decomposition catalyst has excellent electro-catalytic water decomposition performance.

Description

technical field [0001] The invention belongs to the field of electrochemical catalysis, and in particular relates to a water splitting catalyst and a preparation method and application thereof. Background technique [0002] With the development of society, the large-scale use of fossil fuels has resulted in massive emissions of carbon dioxide, carbon monoxide and other greenhouse gases, which are harmful to the global climate, making environmental pollution and energy shortages increasingly serious, and prompting people to develop new renewable and clean energy sources. Hydrogen energy has attracted widespread attention due to its advantages of high energy density and environmental friendliness. In addition, the earth has abundant water resources as raw materials for hydrogen production, and the electricity generated by renewable energy such as solar energy and wind energy is used to drive the water splitting reaction to generate hydrogen energy. The HER in the electrocataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/091C25B11/056C25B11/065
CPCC25B1/04C25B11/091C25B11/056C25B11/065Y02E60/36Y02P20/133
Inventor 安丽席聘贤訾胜杰
Owner LANZHOU UNIVERSITY
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