Structure and electrocatalysis of sputtered RuPt thin-film electrodes.
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.
Kim
Tae-Wook
TW
Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, South Korea.
Park
Seong-Ju
SJ
Jones
Lindsay E
LE
Toney
Michael F
MF
Park
Kyung-Won
KW
Sung
Yung-Eun
YE