Pt-Ru电极上的CH_3OH吸附和氧化的电化学拉曼光谱研究  

The Adsorption and Oxidation of Methanol at Pt-Ru Electrodes Studied by Raman Spectroscopy

作　　者：佘春兴[1] 王小聪[1] 任斌[1] 林华水[1] 田中群[1] 

机构地区：[1]厦门大学化学系

出　　处：《复旦学报（自然科学版）》2002年第3期280-285,共6页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金资助项目 (2 98330 6 0 ;2 990 30 0 9) ;教育部重点资助项目 (99177)

摘　　要：通过在经过特殊表面粗糙的Pt上欠电位沉积不同覆盖度的Ru原子 ,制备出具有表面增强拉曼活性的Pt Ru电极 ,同时利用高灵敏度的共焦显微拉曼光谱仪 ,成功地原位研究了粗糙Pt Ru电极上CH3 OH的解离吸附和氧化过程 .根据在不同电极电位下所获得的表面拉曼谱 ,初步探讨了Pt Ru电极上CH3 OH催化氧化的反应机理 .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. 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.

关 键 词：CH3OH 吸附 电化学拉曼光谱 电催化氧化 Pt-Ru电极 甲醇 一氧化碳 反应机理 燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O646.54[理学—物理化学]