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Structure and electrocatalysis of sputtered RuPt thin-film electrodes

  • Tae Wook Kim
  • , Seong Ju Park*
  • , Lindsay E. Jones
  • , Michael F. Toney
  • , Kyung Won Park
  • , Yung Eun Sung
  • *Corresponding author for this work
  • Gwangju Institute of Science and Technology
  • Stanford Synchrotron Radiation Lightsource
  • Northeastern University
  • Seoul National University

Research output: Contribution to journalJournal articlepeer-review

Abstract

The structural and electrochemical properties of RuPt thin-film electrodes fabricated by radio frequency (rf) magnetron sputtering have been investigated. Grazing incidence X-ray diffraction data show a transition from a face-centered cubic (fee) to hexagonal cubic-packed (hep) structure as the Ru percentage increases. The transition occurs gradually between 32 and 58% Ru, which is significantly different from the bulk RuPt phase diagram. The catalytic activity of the thin-film electrodes for methanol oxidation shows a broad peak near 40-60% Ru, consistent with previous reports. The relationship between catalytic activity and film structure is discussed and contrasted with previous investigations.

Original languageEnglish
Pages (from-to)12845-12849
Number of pages5
JournalJournal of Physical Chemistry B
Volume109
Issue number26
DOIs
StatePublished - 2005.07.7

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