Electro-oxidation of methanol and ethylene glycol on platinum in alkaline solution: Poisoning effects and product analysis

被引：105
|
作者：
Matsuoka, K
Iriyama, Y
Abe, T
Matsuoka, M
Ogumi, Z [1 ]
机构：
[1] Kyoto Univ, Grad Sch Engn, Dept Energy & Hydrocarbon Chem, Nishikyo Ku, Kyoto 6158510, Japan
[2] Ritsumeikan Univ, Fac Sci & Engn, Shiga 5258577, Japan
来源：
ELECTROCHIMICA ACTA | 2005年 / 51卷 / 06期
关键词：
fuel cell; electro-oxidation; methanol; ethylene glycol; poisoning; alkaline solution; reaction mechanism; product analysis;
D O I：
10.1016/j.electacta.2005.06.002
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The electrochemical oxidation of ethylene glycol on platinum was investigated and compared with that of methanol in alkaline solution by using various electrochemical and analytical measurements. Ethylene glycol showed much less significant electrode poisoning than methanol at low potential (400 mV). This phenomenon was clarified by analyzing the products of ethylene glycol oxidation. In ethylene glycol oxidation, partial oxidation to glycolate was much faster than complete oxidation to CO2. In addition, there were two paths for ethylene glycol oxidation: poisoning and non-poisoning paths. The poisoning path led to the production of C1 compounds and the non-poisoning path gave oxalate. The non-poisoning path prevented the formation of poisonous species on platinum. (C) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1085 / 1090
页数：6
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