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Catalyst for electrochemical water decomposition reaction, and preparation method thereof

A catalyst and water splitting technology, applied in the field of electrochemistry, can solve the problems of low catalytic activity, high cost of raw material scarcity, single catalytic reaction, etc., achieve low reaction temperature, improve electrocatalytic activity and cycle stability, and simple preparation process Effect

Pending Publication Date: 2020-06-26
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of low electrocatalytic activity of existing electrochemical catalysts, single catalytic reaction, and high cost of existing reaction raw materials, and provides a catalyst for electrochemical water splitting reaction and a preparation method thereof

Method used

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  • Catalyst for electrochemical water decomposition reaction, and preparation method thereof
  • Catalyst for electrochemical water decomposition reaction, and preparation method thereof
  • Catalyst for electrochemical water decomposition reaction, and preparation method thereof

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specific Embodiment approach 1

[0030] Specific Embodiment 1: In this embodiment, a catalyst for electrochemical water splitting reaction is prepared by electrospinning with metal ion nitrate as the precursor, denoted as LnBa 1-x Sr x co 2-y Fe y o 5+δ Catalyst; wherein δ is 0-0.5, x is 0-0.5, y is 0-0.4, and Ln is Pr, Eu or Gd.

[0031] δ represents the non-stoichiometric value of oxygen.

specific Embodiment approach 2

[0032] Specific embodiment two: the preparation method of the catalyst for electrochemical water splitting reaction in this embodiment is carried out according to the following steps:

[0033] 1. According to the formula LnBa 1-x Sr x co 2-y Fe y o 5+δ Weigh the raw materials of the catalyst, add the raw materials into N,N-dimethylformamide, stir magnetically at room temperature until completely dissolved, and obtain a metal ion nitrate dispersion; the concentration of the metal ion nitrate dispersion is 0.05 ~0.1mol / L;

[0034] 2. Add polyvinylpyrrolidone to the metal ion nitrate dispersion and continue magnetic stirring to obtain the required precursor solution for electrospinning; the volume ratio of the quality of the polyvinylpyrrolidone to the metal ion nitrate dispersion is 1g : (8 ~ 10) mL;

[0035] 3. Inject the electrospinning precursor solution into a syringe with a stainless steel needle, place the syringe in the electrospinning machine, adjust the electrospi...

specific Embodiment approach 3

[0038] Specific embodiment three: this embodiment is different from specific embodiment two: the raw material described in step one is the nitrate of metal ion in the formula; Wherein Ln represents lanthanide nitrate, specifically Pr(NO 3 ) 3 ·6H 2 O, Eu(NO 3 ) 3 ·6H 2 O or Gd(NO 3 ) 3 ·6H 2 O. Others are the same as in the second embodiment.

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Abstract

The invention discloses a catalyst for an electrochemical water decomposition reaction, and a preparation method thereof, belongs to the technical field of electrochemistry, and particularly relates to a catalyst for an electrochemical water decomposition reaction, and a preparation method thereof. A purpose of the invention is to solve the problems of low electrocatalytic activity, single catalytic reaction, and scarcity and high of existing reaction raw materials of the existing electrochemical catalyst. The catalyst for the electrochemical water decomposition reaction is prepared by takingmetal ion nitrate as a precursor through electrostatic spinning. The method comprises the following steps: 1, synthesizing a nanofiber precursor by high-voltage electrostatic spinning; and 2, calcining at a high temperature to prepare the perovskite structure LnBa(1-x)SrxCo(2-y)FeyO(5+delta) catalyst material. The obtained perovskite material can be used as a bifunctional catalyst to be applied towater electrolysis reaction.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a catalyst for electrochemical water splitting reaction and a preparation method thereof. Background technique [0002] The development of sustainable energy is a huge driving force for economic development and social progress. Every adoption of new energy will promote the progress of human society. Traditional energy such as coal, oil, and natural gas have been exploited in large quantities in recent years and consumed too quickly. in danger of being exhausted. Moreover, the pollution of traditional energy after burning is serious, and there is a serious problem of environmental pollution. With the increasing awareness of energy systems and environmental protection, it is imperative to find new, non-polluting alternative energy sources. For a long time, people think that hydrogen is an ideal green and clean energy. As a zero-emission energy source, it has...

Claims

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Application Information

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IPC IPC(8): B01J23/825B01J35/10C25B11/06C25B1/04
CPCB01J23/825C25B11/04C25B1/04B01J35/33B01J35/61Y02E60/36
Inventor 夏天王秀窦英南赵辉
Owner HEILONGJIANG UNIV
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