論文

査読有り
2018年7月1日

Aromatic Ring Size Effect of a Surface Modification Agent on Platinum Nanoparticle Electrocatalysts for Oxygen Reduction Reaction

Electrocatalysis
  • Keiko Miyabayashi
  • ,
  • Kenta Ishihara
  • ,
  • Prerna Joshi
  • ,
  • Zhongrong Shen
  • ,
  • Mikio Miyake

9
4
開始ページ
486
終了ページ
494
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1007/s12678-018-0462-6
出版者・発行元
Springer New York LLC

Platinum nanoparticles (NPs) modified with alkylamines containing various aromatic rings (benzyl, naphtyl, anthryl, and pyrenyl) were synthesized as model cathode catalysts for fuel cells to investigate the role of aromatic surface modification agents on catalytic performance. Surface modification of Pt was confirmed by nuclear magnetic resonance spectra for NPs and thermogravimetric analysis for carbon-supported catalysts. Surface modification of Pt NPs with aromatic alkylamines improved the electrocatalytic activities for the oxygen reduction reaction, whose activity values increased by increasing the number of aromatic rings. The effect of surface modification on the electronic properties of the catalyst was evaluated by X-ray photoelectron spectroscopy. A large positive shift in the Pt 4f binding energy of surface-modified catalyst, especially for anthryl and pyrenyl modifications, was observed, indicating that one of the important factors is metal–support interaction facilitated by the aromatic groups through the interactions with carbon support.

リンク情報
DOI
https://doi.org/10.1007/s12678-018-0462-6

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