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Oxygen evolution reaction catalyst and its preparation method and application

An oxygen evolution reaction and catalyst technology, applied in the field of electrochemical catalysis, can solve the problems of high cost, low conductivity, unsatisfactory stability, etc., and achieve the effect of low cost, high conductivity and good conductivity

Inactive Publication Date: 2021-01-05
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide an oxygen evolution reaction catalyst and its preparation method and application, so as to solve the problem of high cost and unsatisfactory stability caused by the use of noble metals in the existing oxygen evolution reaction catalyst, or the existing first Precious metal content, but technical issues with lower conductivity

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  • Oxygen evolution reaction catalyst and its preparation method and application
  • Oxygen evolution reaction catalyst and its preparation method and application
  • Oxygen evolution reaction catalyst and its preparation method and application

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preparation example Construction

[0029] On the other hand, the embodiment of the present invention also provides the preparation method of the oxygen evolution reaction catalyst mentioned above. Described oxygen evolution reaction catalyst preparation method comprises the steps:

[0030] S01: Follow Y 2-x m x Ru 2 o 7In the molar ratio of Y, M and Ru elements, Y salt, M salt and Ru salt are dissolved to prepare a mixed solution;

[0031] S02: adding a metal ion complex to the mixed solution for complexation reaction, and then removing the solvent in the mixed solution to obtain a solid mixture;

[0032] S03: Carrying out calcination in an oxygen-containing atmosphere after pulverizing the solid mixture.

[0033] Wherein, in the step S01, Y 2-x m x Ru 2 o 7 Y as mentioned above 2-x m x Ru 2 o 7 , Therefore, the molar ratio of Y, M and Ru elements is as mentioned above, specifically, if M is Pr or Zn, 03 ) 3 ∙6H 2 O, anhydrous YCl 3 , YCl 3 ∙6H 2 At least one of O, the Ru salt can be selected ...

Embodiment 11

[0051] This embodiment provides an oxygen evolution reaction catalyst and a preparation method thereof. The oxygen evolution reaction catalyst is Y pyrochlore structure 1.8 PR 0.2 Ru 2 o 7 .

[0052] Described oxygen evolution reaction catalyst preparation method comprises the steps:

[0053] S11. Set Y(NO 3 ) 3 ∙6H 2 O was dissolved in deionized water to obtain the first solution with a concentration of 0.045 mol L -1 .

[0054] S12. Pr(NO 3 ) 3 ∙6H 2 O was dissolved in deionized water to obtain a second solution with a concentration of 0.005 mol L -1 ;

[0055] S13. RuCl 3 A second solution of S12 was added to obtain a third solution, RuCl 3 The concentration is 0.05mol L -1 , stirring for 10 minutes;

[0056] S14. Dissolve citric acid in the third solution of S13, stir for 30 minutes, the concentration of citric acid is 0.20mol L -1 ;

[0057] S15. Heat the solvent of S14 in a water bath at 80°C, evaporate the solvent to dryness, put the obtained product ...

Embodiment 12

[0060] This embodiment provides an oxygen evolution reaction catalyst and a preparation method thereof. The oxygen evolution reaction catalyst is Y pyrochlore structure 1.85 Zn0.15 Ru 2 o 7 .

[0061] Described oxygen evolution reaction catalyst preparation method comprises the steps:

[0062] S11. Set Y(NO 3 ) 3 ∙6H 2 O was dissolved in deionized water to obtain the first solution with a concentration of 0.04625 mol L -1 .

[0063] S12. Zn(NO 3 ) 3 ∙6H 2 O was dissolved in deionized water to obtain a second solution with a concentration of 0.00375 mol L -1 ;

[0064] S13. RuCl 3 A second solution of S12 was added to obtain a third solution, RuCl 3 The concentration is 0.05mol L -1 , stirring for 10 minutes;

[0065] S14. Dissolve citric acid in the third solution of S13, stir for 30 minutes, the concentration of citric acid is 0.30mol L -1 ;

[0066] S15. Heat the solvent of S14 in a water bath at 80°C, evaporate the solvent to dryness, put the obtained prod...

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Abstract

The invention provides a hydrogen evolution reaction catalyst, and a preparation method and applications thereof. The hydrogen evolution reaction catalyst is Y<2-x>M<x>Ru<2>O<7>, wherein M is Pr or Zn, 0<x<2. The preparation method comprises following steps: a mixed solution containing a Y salt, a M salt, and a Ru salt is prepared; a metal ion complex is added into the mixed solution for ligand reaction to prepare a Y<2>Ru<2>O<7> precursor; and the Y<2>Ru<2>O<7> precursor is subjected to calcining treatment. The hydrogen evolution reaction catalyst is low in precious metal content, high in conductivity, and stable in hydrogen evolution catalytic activity; the preparation technology conditions are easy to control; the repeatability is high; the production efficiency is high; the hydrogen evolution reaction catalyst can be used in hydrogen evolution reaction electrode preparation, electrochemical device preparation, and production of hydrogen and oxygen from water; the efficiency of production of hydrogen and oxygen from water can be increased; and the economical cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of electrochemical catalysis, and in particular relates to an oxygen evolution reaction catalyst and its preparation method and application. Background technique [0002] As an important secondary energy source, hydrogen has broad application prospects in the future energy pattern of human society. Hydrogen itself is a clean and efficient energy carrier. With the power-to-gas technology of fuel cells as the core node, the use of intermittent renewable energy such as wind energy and solar energy for hydrogen production can meet the urgent need for large-scale clean energy conversion and storage. [0003] Power to gas technology (Power to gas, often abbreviated as P2G or PtG), is a technology that converts electricity into gaseous fuel. Industrialized water electrolysis hydrogen production technology. The key to power-to-gas technology is to use electricity to split water into oxygen and hydrogen through ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/077C25B1/04
CPCC25B1/04C25B11/075Y02E60/36
Inventor 冯其陶有堃李辉王海江
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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