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A kind of proton exchange membrane fuel cell anti-reverse anode pt/wo 3 -mn catalyst and preparation method thereof

A proton exchange membrane and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of cumbersome catalyst preparation process, poor oxide conductivity, and mass transfer problems, and achieve excellent initial performance, low cost, The effect of high retention rate

Active Publication Date: 2022-04-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the catalyst is cumbersome and requires high-temperature reduction of hydrogen, which has certain hidden dangers.
And oxides are poorly conductive, which can lead to mass transfer problems at high current densities

Method used

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  • A kind of proton exchange membrane fuel cell anti-reverse anode pt/wo <sub>3</sub> -mn catalyst and preparation method thereof
  • A kind of proton exchange membrane fuel cell anti-reverse anode pt/wo <sub>3</sub> -mn catalyst and preparation method thereof
  • A kind of proton exchange membrane fuel cell anti-reverse anode pt/wo <sub>3</sub> -mn catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dissolve 0.825g of sodium tungstate, 0.56g of sodium chloride and 0.283g of manganese sulfate in 19mL of deionized water. After stirring evenly, add 3M HCl solution dropwise until the pH is 2. Transfer the solution to a Teflon-lined In an autoclave, react at 180° C. for 3 h, after natural cooling, wash the reaction product with deionized water, and put it in a vacuum oven overnight. The dried product was carefully ground and annealed in a tube furnace at 400°C for 2h to obtain a catalyst support.

[0038] Weigh 14.6 mg of catalyst carrier and ultrasonically disperse it in 50 mL of ethylene glycol solution, then add 0.5 mM chloroplatinic acid solution, react the mixture at 140 ° C for 3 h, wash the product with a large amount of deionized water, and place it in a vacuum oven to dry 12h.

[0039] Taking Example 1 as an example, figure 1 WO provided for this application 3 - The Mn catalyst carrier, which is rod-shaped in appearance and has a diameter of 50-100 nm.

[0...

Embodiment 2

[0043] Dissolve 0.825g of sodium tungstate, 0.56g of sodium chloride and 0.141g of manganese sulfate in 19mL of deionized water. After stirring evenly, add 3M HCl solution dropwise until the pH is 2. Transfer the solution to a Teflon-lined In an autoclave, react at 180° C. for 3 h, after natural cooling, wash the reaction product with deionized water, and put it in a vacuum oven overnight. The dried product was carefully ground and annealed in a tube furnace at 400°C for 2h to obtain a catalyst support.

[0044] Weigh 14.6 mg of catalyst carrier and ultrasonically disperse it in 50 mL of ethylene glycol solution, then add 0.5 mM chloroplatinic acid solution, react the mixture at 140 °C for 3 h, wash the product with a large amount of deionized water, and place it in a vacuum oven to dry 12h.

[0045] Taking Example 2 as an example, the anti-reverse catalyst prepared in Example 2 is prepared into a battery, Pt / WO 3 -The loading of Mn in the anode catalytic layer is 0.2mgcm -...

Embodiment 3

[0047] Dissolve 0.825g of sodium tungstate, 0.56g of sodium chloride and 0.071g of manganese sulfate in 19mL of deionized water, stir well, add 3M HCl solution dropwise until the pH is 2, and transfer the solution to a Teflon-lined In an autoclave, react at 180° C. for 3 h, after natural cooling, wash the reaction product with deionized water, and put it in a vacuum oven overnight. The dried product was carefully ground and annealed in a tube furnace at 400°C for 2h to obtain a catalyst support.

[0048] Weigh 39.02 mg of catalyst carrier and ultrasonically disperse it in 50 mL of ethylene glycol solution, then add 0.5 mM chloroplatinic acid solution, react the mixture at 140 ° C for 3 h, wash the product with a large amount of deionized water, and place it in a vacuum oven to dry 12h, the catalyst was obtained.

[0049] Taking Example 3 as an example, the anti-reverse catalyst prepared in Example 2 was prepared into a battery, Pt / WO 3 -The loading of Mn in the anode catalyt...

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Abstract

The invention discloses a proton exchange membrane fuel cell anti-anti-electrode catalyst and a preparation method thereof. The catalyst preparation method is as follows: first prepare WO by hydrothermal method 3 ‑Mn carrier, then in WO 3 ‑Pt was loaded on the Mn carrier by polyol reflux method to obtain Pt / WO 3 ‑Mn catalyst. The proton exchange membrane fuel cell prepared based on the catalyst provided by the present invention has significantly improved anti-reversal performance, and the use of non-carbon catalyst carrier can effectively avoid the corrosion of the carbon carrier caused by the reverse electrode, thus protecting the structure of the catalytic layer and helping to improve the durability of the battery sex.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to an anode catalyst with remarkable anti-reversal performance for fuel cells and a preparation method thereof, which can effectively avoid carbon corrosion caused during fuel cell reverse polarity, thereby protecting the structure of the catalytic layer and improving the efficiency of the fuel cell. durability. Background technique [0002] Proton exchange membrane fuel cells (PEMFCs) have attracted extensive attention as an efficient and clean power source for fuel cell electric vehicles due to their high power density, high efficiency, and zero emissions. In order for automotive fuel cells to be commercially viable, three major challenges must be addressed: cost, performance, and durability. [0003] In normal operation of PEMFCs, durability problems mainly occur at the cathode because of carbon oxidation and platinum accumulation at the operating potential of the cathode. However, un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/92H01M4/90H01M4/88
CPCH01M4/921H01M4/925H01M4/9041H01M4/9075H01M4/8825H01M2004/8684Y02E60/50
Inventor 宋微李咏焕姜广俞红梅邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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