The d-band structure of Pt nanoclusters correlated with the catalytic activity for an oxygen reduction reaction

Eishiro Toyoda, Ryosuke Jinnouchi, Tatsuya Hatanaka, Yu Morimoto, Kei Mitsuhara, Anton Visikovskiy, Yoshiaki Kido

研究成果: Contribution to journalArticle査読

78 被引用数 (Scopus)

抄録

This paper presents the correlation between the d-band center of Pt nanoclusters and the catalytic activity for an oxygen reduction reaction (ORR). The size-dependent d-band center was determined for Pt nanoclusters deposited on glassy carbon substrates by photoelectron spectroscopy using synchrotron radiation light. It is found that the d-band center moves toward the Fermi level (EF) with decreasing cluster size, as predicted by the first-principles calculations using linear combinations of pseudoatomic orbitals and norm-conserved pseudopotentials. The ORR activity of Pt nanoclusters measured by linear sweep voltammetry with the rotating disk electrode method reveals that the activity is diminished with decreasing cluster size and with moving the d-band center toward the EF. This is consistent with the d-band model claiming that the closer the d-band center is to EF the larger the oxygen adsorption energy is.

本文言語英語
ページ(範囲)21236-21240
ページ数5
ジャーナルJournal of Physical Chemistry C
115
43
DOI
出版ステータス出版済み - 11 3 2011
外部発表はい

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 表面、皮膜および薄膜
  • 物理化学および理論化学

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