Pt-Au@Pt core-shell structure fuel cell cathode catalyst and preparation method thereof
A fuel cell cathode, core-shell structure technology, applied in battery electrodes, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low coverage, low catalytic activity, low Pt coverage on the catalyst surface, etc. The effect of improving quality and activity, enriching resources, and solving the problem of catalyst resources
Inactive Publication Date: 2013-05-08
WUHAN UNIV
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The invention discloses a Pt-Au@Pt core-shell structure fuel cell cathode catalyst and a preparation method thereof. The Pt-Au@Pt core-shell structure fuel cell cathode catalyst consists of a conductive carrier and Pt-Au@Pt core-shell structure nanoparticles. The preparation method comprises the following steps of: reducing a gold compound by using sodium borohydride to obtain Au nanoparticles, and loading the Au particles on the surface of a carbon carrier to obtain Au/C; and putting Au/C in a platinum compound water solution to obtain loaded-type Pt/Au alloy nanoparticles after Pt is subjected to spontaneous reductive deposition on the Au surface, depositing a Cu atom monolayer on the surface of the Pt-Au alloy nanoparticles by using an underpotential deposition method and then displacing the Cu atom monolayer with Pt to obtain the Pt-Au@Pt core-shell structure fuel cell cathode catalyst. The catalyst prepared by using the preparation method disclosed by the invention is high in catalytic activity and stability and low in cost relative to a pure Pt catalyst; and the preparation method is simple and convenient, mild in condition and easy to operate and can be used for solving the problem that a core-shell structure catalyst prepared by using a conventional chemical reduction method is high in Pt agglomeration degree on the surface and a catalyst prepared by using a single underpotential deposition method is low in Pt coverage degree on the surface.
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Gold CompoundsAlloy nanoparticle +7
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Property | Measurement | Unit |
Particle size range | 2.0 ~ 5.0 | nm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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