Platinum-decorated tin oxide and niobium-doped tin oxide pefc electrocatalysts: Oxygen reduction reaction activity

T. Tsukatsune, Y. Takabatake, Z. Noda, T. Daio, A. Zaitsu, S. M. Lyth, A. Hayashi, K. Sasaki

研究成果: ジャーナルへの寄稿学術誌査読

34 被引用数 (Scopus)

抄録

Using tin oxide (SnO2) and niobium-doped tin oxide (Nb-SnO2) as alternative electrocatalyst support materials can effectively solve the issue of carbon corrosion in polymer electrolyte fuel cell (PEFC) cathodes. Here, we systematically explore the effect of support surface area, Pt loading, and Pt nanoparticle size on the electrochemistry of these carbon-free electrocatalysts. Reducing the Pt loading leads to an increase in electrochemical surface area, but the specific activity decreases as previously observed in conventional carbon based electrocatalysts. Removing residual chlorine impurities by replacing the H2PtCl6 nanoparticle precursor with Pt(acac)2 increases the specific activity. Niobium-doping of the SnO2 support also results in an increase in specific activity, due to the increased electronic conductivity. Consequently, the oxygen reduction reaction activity of optimized Pt-decorated Nb-SnO2 is approaching to that of Pt-decorated carbon black, the current state-of-the-art PEFC electrocatalyst.

本文言語英語
ページ(範囲)F1208-F1213
ジャーナルJournal of the Electrochemical Society
161
12
DOI
出版ステータス出版済み - 2014

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

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