First observation of platinum-195 nuclear magnetic resonance in commercial graphite-supported platinum electrodes in an electrochemical environment

Y. Y. Tong, C. Belrose, A. Wieckowski, Eric Oldfield

Research output: Contribution to journalArticle

Abstract

As a first step toward the long-term goal of achieving a better understanding of CO tolerance in Pt/Ru fuel cell materials, the first observation is presented on 195Pt NMR in commercial, graphite-supported nanoscale platinum electrodes in an electrochemical environment. Electrochemically cleaned platinum electrodes in electrolyte solutions show 195Pt NMR spectra characteristics of small platinum particles with clean surfaces, very similar to those obtained from typical gas-phase catalysts, but the slow beat observed at the conventional surface peak position (1.100 G/kHz) indicates that the Ruderman-Kittel-Kasuya-Yosida (RKKY) J coupling is almost twice that seen in the gas-phase case, which suggests a major enhancement of the s-like local density of states at the Fermi level (Ef-LDOS).

Original languageEnglish (US)
Pages (from-to)11709-11710
Number of pages2
JournalJournal of the American Chemical Society
Volume119
Issue number48
DOIs
StatePublished - Dec 3 1997

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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