Spontaneous adsorption of heteropolytungstates and heteropolymolybdates on the surfaces of solid electrodes and the electrocatalytic activity of the adsorbed anions

被引:94
作者
Rong, CY [1 ]
Anson, FC [1 ]
机构
[1] CALTECH,ARTHUR AMOS NOYES LABS,DIV CHEM & CHEM ENGN,PASADENA,CA 91125
关键词
electrocatalysis; adsorption; heteropolytungstate anion; heteropolymolybdate anion;
D O I
10.1016/0020-1693(95)04843-X
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Heteropolytungstate and heteropolymolybdate anions spontaneously adsorb from aqueous solutions onto mercury, gold, pyrolytic graphite and glassy carbon electrodes. The adsorption persists when the electrodes are transferred to pure supporting electrolyte solutions where the electrochemical responses from the adsorbed anions can be observed. The adsorption is much less extensive from non-aqueous solvents. The adsorbed anions can serve as catalysts for various electrode reactions. Examples are given of the electrocatalytic reductions of hydrogen peroxide to water and of nitrite to ammonia.
引用
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页码:11 / 16
页数:6
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