Fuel cells: Spectroscopic studies in the electrocatalysis of alcohol oxidation

被引:94
作者
Iwasita, T [1 ]
机构
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Carlos, SP, Brazil
关键词
electrocatalysis; spectroscopic methods; fuel cells; alcohol oxidation; small organic molecules;
D O I
10.1590/S0103-50532002000400002
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Modern spectroscopic methods are useful for elucidating complex electrochemical mechanisms as those occurring during the oxidation of small organic molecules (CH3OH, HCOH, HCOOH). In the present paper it is shown the use of spectroscopic methods to study the oxidation of alcohols on platinum or Pt-based binary electrodes. These reactions are of importance in conexion with the development of anode systems for use in fuel cells. Mass spectrometry and FT infrared spectroscopy allow to establishing the reaction intermediates and products and the dependence of the amount of species on the applied potential. FTIR and scanning tunneling microscopy contribute to understand the effects of the surface structure on the rate of reaction. Examples are presented for methanol and ethanol oxidation at pure and modified Pt catalysts.
引用
收藏
页码:401 / 409
页数:9
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