ELECTROOXIDATION OF METHANOL IN SULFURIC-ACID ELECTROLYTE ON PLATINIZED-CARBON ELECTRODES WITH SEVERAL FUNCTIONAL-GROUP CHARACTERISTICS

被引：106

作者：

SHUKLA, AK ^{[1
]}

RAVIKUMAR, MK ^{[1
]}

ROY, A ^{[1
]}

BARMAN, SR ^{[1
]}

SARMA, DD ^{[1
]}

ARICO, AS ^{[1
]}

ANTONUCCI, V ^{[1
]}

PINO, L ^{[1
]}

GIORDANO, N ^{[1
]}

机构：

[1] CNR, INST TRANSFORMAT & STORAGE ENERGY, I-98126 ST LUCIA, ITALY

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1994年 / 141卷 / 06期

关键词：

D O I：

10.1149/1.2054955

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The effect of acid/base functional-groups associated with platinized-carbon electrodes on their catalytic activity toward electro-oxidation of methanol in sulfuric acid electrolyte at 60-degrees-C is studied. Platinized-carbon electrodes with sm amounts of functional groups exhibit higher catalytic activity compared to those with large concentrations of acidic/basic surface functionalities. The overpotential for methanol oxidation is minimum on electrodes of platinized carbons with pHzpc values between 6 and 7. An x-ray photoelectron spectroscopic study of various platinized carbons suggests that the acid/base surface functional-groups produce ample amounts of surface Pt-oxides and a consequent decrease in activity toward methanol oxidation.

引用

页码：1517 / 1522

页数：6

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