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

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)21236-21240
Number of pages5
JournalJournal of Physical Chemistry C
Volume115
Issue number43
DOIs
Publication statusPublished - Nov 3 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

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