Electrocatalytic reduction of NO3- on palladium/copper electrodes

被引：264

作者：

de Vooys, ACA ^{[1
]}

van Santen, RA ^{[1
]}

van Veen, JAR ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Dept Inorgan Chem & Catalysis, NL-5600 MB Eindhoven, Netherlands

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2000年 / 154卷 / 1-2期

关键词：

electrocatalytic reduction; nitrate reduction; palladium/copper; DEMS; nitrite;

D O I：

10.1016/S1381-1169(99)00375-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The reduction of NO3- on palladium/copper electrodes has been studied using differential electrochemical mass spectroscopy (DEMS), rotating ring-disk electrodes (RRDE) and quartz microbalance electrodes (ECQM). In acidic electrolytes, the activity increases linearly with Cu coverage, in alkaline electrolytes, a different dependence on coverage is observed. One monolayer of Cu gives a different selectivity from bulk copper. The adsorption of NO3- is competitive with SO42-, whereas Cl- adsorption blocks the reduction. Competitive adsorption lowers both the activity and the selectivity to N-2. Copper activates the first electron transfer, the role of palladium is to steer the selectivity towards N-2. The trends in activity and selectivity are explained in terms of coverage of N-species. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：203 / 215

页数：13

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