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Catalyst used for proton exchanging film fuel battery and method for producing the same

A proton exchange membrane, fuel cell technology, applied in chemical instruments and methods, physical/chemical process catalysts, battery electrodes, etc., can solve the problems of fuel cell catalyst performance degradation, carbon carrier corrosion, etc., to achieve dispersion capacity and active area improvement , The effect of preventing agglomeration and good electrical conductivity

Inactive Publication Date: 2009-04-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of carbon carrier corrosion and metal particle agglomeration in the existing fuel cell catalysts, and to provide a catalyst for proton exchange membrane fuel cells and its preparation method

Method used

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  • Catalyst used for proton exchanging film fuel battery and method for producing the same
  • Catalyst used for proton exchanging film fuel battery and method for producing the same
  • Catalyst used for proton exchanging film fuel battery and method for producing the same

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specific Embodiment approach 1

[0009] Specific implementation mode one: combine figure 1 and figure 2 Explain that the catalyst used in the proton exchange membrane fuel cell in this embodiment is composed of a carrier 1 and metal particles 2 dispersed on the surface of the carrier 1; wherein the carrier 1 is composed of a core 3 and a shell 4 covering the surface of the core 3, and the metal particles 2 are metal Elemental particles, binary metal alloy particles or ternary metal alloy particles, the core 3 is nano-carbon black material, and the shell 4 is mesoporous oxide conductive ceramics.

[0010] In this embodiment, carrier 1 such as figure 1 Shown; The catalyst that the present embodiment obtains is used for proton exchange membrane fuel cell such as figure 2 shown.

specific Embodiment approach 2

[0011] Embodiment 2: This embodiment is different from Embodiment 1 in that: the diameter of the metal particles (2) is 1-15 nm. Others are the same as in Embodiment 1

specific Embodiment approach 3

[0012] Embodiment 3: This embodiment is different from Embodiment 1 in that: the metal element is Pt, Ru, Pd, Rh or Ir. Others are the same as in the first embodiment.

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Abstract

A catalyst used for proton exchange membrane fuel cells and a preparation method thereof relate to the catalyst used for fuel cells and the preparation method thereof. The invention solves the problem of performance attenuation of the existing catalyst used for fuel cells caused by carbon carrier corrosion and prill glomeration. The catalyst used for the proton exchange membrane fuel cells is made from nano-carbon black material, mesoporous oxide conductive ceramics and prill. The preparation method comprises the following steps: 1. preparing mixed solution D; 2. preparing mixed solution E; 3. preparing mixed solution F; 4. preparing precipitate X; 5. preparing catalyst carrier; 6. preparing mixed solution G; 7. obtaining precipitate Y; 8. adjusting the pH of the precipitate Y, drying the precipitate Y and obtaining the catalyst. The carrier used by the preparation of the catalyst is not easy to erode, and the prill has good dispersiveness, so that the obtained product has good activity and the battery prepared by the catalyst has stable performance; the invention has simple preparation technique and easy obtained products.

Description

technical field [0001] The invention relates to a catalyst for fuel cells and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has the advantages of high energy conversion efficiency, high specific power, no electrolyte corrosion, fast start-up, etc. It has broad application prospects in electric vehicles, portable electronic equipment, fixed power stations and military special power supplies. , has become a hot spot of research all over the world. In order to obtain high catalytic activity and reduce the cost of fuel cells, at present, PEMFC usually uses highly dispersed carbon-supported platinum or platinum alloy (Pt / C or PtM / C) as a catalyst. However, in the working process of PEMFC, the Pt / C catalyst or PtM / C catalyst has the problem of gradually reducing the effective active surface area due to carbon support corrosion and metal particle agglomeration, which will lead to the performance degradation of the fuel cell,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/90H01M4/88B01J23/38B01J23/89
CPCY02E60/50
Inventor 杜春雨尹鸽平史鹏飞王振波程新群左朋建
Owner HARBIN INST OF TECH
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