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Mixed oxide multifunctional electro-catalytic material as well as preparation method and application thereof

A technology of electrocatalytic materials and mixed oxides, which is applied in the direction of circuits, electrical components, battery electrodes, etc., can solve the problems of insufficient stability of pure ceria, achieve improved anti-reversal ability, excellent dispersion and uniformity, The effect of improving the elimination ability

Active Publication Date: 2021-09-07
SINOHYKEY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering that the stability of pure ceria is insufficient, and it is easy to dissolve in the electrochemical environment of the fuel cell membrane electrode, the stability of the material can be improved to a certain extent by loading iridium-containing oxides on the surface of ceria

Method used

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  • Mixed oxide multifunctional electro-catalytic material as well as preparation method and application thereof
  • Mixed oxide multifunctional electro-catalytic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of mixed oxide multifunctional electrocatalytic material of the present invention:

[0045] 0.868g Ce(NO 3 ) 3 ·6H 2 O was dissolved in 5mL of water, and a certain amount of 0.21g NaOH was dissolved in 35mL of water. The two solutions were mixed in a polytetrafluoroethylene reactor and stirred magnetically for 30 min. Then the reactor was placed in an oven and kept at 100 °C for 24 h. After the hydrothermal reaction, the product was washed and filtered three times with water and ethanol, and then dried in an oven at 60° C. for about 30 minutes. Then 30 mg of the product was weighed and added to 20 mL of 0.1 M NaOH solution, and the mixture was sonicated for at least 30 min to ensure uniform mixing. Then 0.0735g of H 2 IrCl 6 ·6H 2 O (35wt% Ir) precursor was added to the solution. The solution was transferred to a 40 mL polytetrafluoroethylene reactor, and then sonicated for about 10 min to form a homogeneous solution. The reaction kettle was placed...

Embodiment 2

[0047] 0.868g Ce(NO 3 ) 3 ·6H 2 O was dissolved in 5mL of water, and a certain amount of 0.21g NaOH was dissolved in 35mL of water. The two solutions were mixed in a polytetrafluoroethylene reactor and stirred magnetically for 30 min. Then the reactor was placed in an oven and kept at 100 °C for 24 h. After the hydrothermal reaction, the product was washed and filtered three times with water and ethanol, and then dried in an oven at 60° C. for about 30 minutes. Then 30 mg of the product was weighed and added to 20 mL of 0.1 M NaOH solution, and the mixture was sonicated for at least 30 min to ensure uniform mixing. Then 0.0558g of H 2 IrCl 6 ·6H 2 O (35wt% Ir) precursor was added to the solution. The solution was transferred to a 40 mL polytetrafluoroethylene reactor, and then sonicated for about 10 min to form a homogeneous solution. The reaction kettle was placed in an oven and kept at 150°C for 720min. The precipitate was obtained by suction filtration and washing...

Embodiment 3

[0049] 0.868g Ce(NO 3 ) 3 ·6H 2 O was dissolved in 5mL of water, and a certain amount of 0.21g NaOH was dissolved in 35mL of water. The two solutions were mixed in a polytetrafluoroethylene reactor and stirred magnetically for 30 min. Then the reactor was placed in an oven and kept at 100 °C for 24 h. After the hydrothermal reaction, the product was washed and filtered three times with water and ethanol, and then dried in an oven at 60° C. for about 30 minutes. Then 30 mg of the product was weighed and added to 20 mL of 0.1 M NaOH solution, and the mixture was sonicated for at least 30 min to ensure uniform mixing. Then 0.0882g of H 2 IrCl 6 ·6H 2 O (35wt% Ir) precursor was added to the solution. The solution was transferred to a 40 mL polytetrafluoroethylene reactor, and then sonicated for about 10 min to form a homogeneous solution. The reaction kettle was placed in an oven and kept at 150°C for 720min. The precipitate was obtained by suction filtration and washing...

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Abstract

The invention provides a mixed oxide multifunctional electro-catalytic material, and belongs to the technical field of electro-catalytic materials and is composed of a metal oxide A with oxygen storage capacity and a metal oxide B with oxygen evolution reaction catalytic activity. Through cooperation of the metal oxide A with oxygen storage capacity and the metal oxide B with oxygen evolution reaction catalytic activity, the poisoning of carbon monoxide to the catalyst can be alleviated, damage of free radicals to a proton exchange membrane can be weakened, and the protection can be provided for a carbon carrier and a catalytic layer through electrolyzed water when an electric fuel cell stack is subjected to pole reversal; the stability of the catalytic material can also be improved, and a positive effect on improving the catalytic performance of the catalytic material is also achieved; the invention also provides a preparation method and application of the mixed oxide multifunctional electro-catalytic material.

Description

technical field [0001] The invention relates to the technical field of electrocatalytic materials, and more specifically, to a mixed oxide multifunctional electrocatalytic material and its preparation method and application. Background technique [0002] A fuel cell is an energy conversion device, which can directly convert the chemical energy in the fuel into electrical energy and heat energy through an electrochemical redox reaction, and has the advantages of high conversion efficiency and environmental protection. It can be widely used in a series of fields such as aerospace, military submarines, transportation, portable electronic equipment, and fixed power stations. The use of hydrogen produced by renewable and clean energy is conducive to alleviating the energy crisis and reducing pollutant emissions. [0003] For proton exchange membrane fuel cells, the most critical component is the membrane electrode assembly. Among them, the proton exchange membrane is located in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/92H01M4/88
CPCH01M4/9016H01M4/923H01M4/88Y02E60/50
Inventor 敖洪亮杨云松蔡云叶思宇邹渝泉唐军柯孙宁
Owner SINOHYKEY TECH CO LTD
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