title: Structure and electrocatalysis of sputtered RuPt thin-film electrodes.
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 (fcc) to hexagonal cubic-packed (hcp) 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.
authors.affiliation: Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, South Korea.
authors.forename: Tae-Wook
authors.initials: TW
authors.lastname: Kim
authors.forename: Seong-Ju
authors.initials: SJ
authors.lastname: Park
authors.forename: Lindsay E
authors.initials: LE
authors.lastname: Jones
authors.forename: Michael F
authors.initials: MF
authors.lastname: Toney
authors.forename: Kyung-Won
authors.initials: KW
authors.lastname: Park
authors.forename: Yung-Eun
authors.initials: YE
authors.lastname: Sung