The effect of a graphene support on the properties of Pt electrode catalysts in fuel cells

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  • Nakamura Junji
    Tsukuba Research Center for Interdisciplinary Materials Science, University of Tsukuba, Japan

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  • 燃料電池用白金電極触媒におけるグラフェンの担体効果
  • ネンリョウ デンチヨウ ハッキン デンキョク ショクバイ ニ オケル グラフェン ノ タンタイ コウカ

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Abstract

The use of graphene as a catalyst support for Pt in fuel cells is reviewed. Sub-nano Pt clusters can be prepared on graphene with an electrochemical surface area of 170 m2/g. For such small Pt clusters on graphene, significant improvements in catalytic activity have been observed for the electro-oxidation of CO or methanol, indicating that the graphene support has an effect on the properties of the Pt catalyst. The Pt clusters interact with graphene, resulting in a modification of Pt in terms of electronic structure. The interaction between Pt and graphene is ascribed to π-d hybridization. The reactivity of graphene with molecules or metal clusters is also discussed, in which we propose that non-bonding pz states are responsible for the reactivity.

Journal

  • TANSO

    TANSO 2014 (265), 177-186, 2014

    THE CARBON SOCIETY OF JAPAN

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