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Nanoporous Pt thin films with superior catalytic activities by the electrochemical dissolution of Al

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Abstract

Thin films of alloyed Pt x Al1−x with various chemical compositions (x ≅ 0.27, 0.52, and 0.76) were obtained by a co-sputtering method. As cycles proceeded, Pt x Al1−x thin films showed gradually increasing electrochemical surface areas (Pt-H), due to the electrochemical dissolution of Al from PtxAl1−x thin films, and this reaction led to the straightforward formation of Pt nanoporous structures. Among three different chemical compositions, Pt0.52Al0.48 thin films satisfied both enhanced catalytic activity and mechanical stability after cycling. Electrochemically fabricated nanoporous Pt thin films exhibited superior methanol-oxidation activities compared with untreated Pt and PtRu thin films.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, and Research Center for Energy Conversion and Storage, Seoul National University, Seoul, 151-744, Korea

    Changwoo Nahm, Chunjoong Kim, Yejun Park & Byungwoo Park

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  1. Changwoo Nahm
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  2. Chunjoong Kim
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  3. Yejun Park
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  4. Byungwoo Park
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Correspondence to Byungwoo Park.

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Nahm, C., Kim, C., Park, Y. et al. Nanoporous Pt thin films with superior catalytic activities by the electrochemical dissolution of Al. Met. Mater. Int. 15, 989–992 (2009). https://doi.org/10.1007/s12540-009-0989-4

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  • DOI: https://doi.org/10.1007/s12540-009-0989-4

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