Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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The Investigation of Electro-Oxidation of Methanol on Pt-Ru Electrode Surfaces by in-situ Raman Spectroscopy

  • She, Chun-Xing (Department of Chemistry, Xiamen University) ;
  • Xiang, Juann (Department of Chemistry, Xiamen University) ;
  • Ren, Bin (Department of Chemistry, Xiamen University) ;
  • Zhong, Qi-Ling (College of Chemical and BiologicSsciences, Jiangxi Normal University) ;
  • Wang, Xiao-Cong (College of Chemical and BiologicSsciences, Jiangxi Normal University) ;
  • Tian, Zhong-Qun (State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University)
  • Published : 2002.11.01
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Abstract

Assisted by the highly sensitive confocal microprobe Raman spectrometer and proper surface roughening procedure, the Raman investigation on the adsorption and reaction of methanol was performed on Pt-Ru electrodes with different coverages. A detailed description of the roughening process of the Pt electrodes and the underpotential deposition of the Ru was given. Reasonably good Raman signal reflecting the metal-carbon vibration and CO vibration was detected. The appearance of vibrations of the Ru oxides, together with the existence of Ru-C, Pt-C and CO bands, clearly demonstrates the participation of the bi-functional mechanism during the oxidation process of methanol on Pt-Ru electrodes. The Pt-Ru electrode was found to have a higher catalytic activity over Pt electrodes. This preliminary study shows that electrochemical Raman spectroscopy can be applied to the study of rough electrode surface.

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