Electrochemical reduction of nitrate in weakly alkaline solutions

被引：170
|
作者：
Bouzek, K
Paidar, M
Sadílková, A
Bergmann, H
机构：
[1] Inst Chem Technol, Dept Inorgan Technol, CR-16628 Prague 6, Czech Republic
[2] Anhalt Univ Appl Sci, D-06366 Kothen, Germany
来源：
JOURNAL OF APPLIED ELECTROCHEMISTRY | 2001年 / 31卷 / 11期
关键词：
cyclic voltammetry; electrocatalytic activity; nitrate reduction; rotating ring disc electrode; weakly alkaline;
D O I：
10.1023/A:1012755222981
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The electrocatalytic activity of several materials for the nitrate reduction reaction was studied by cyclic voltammetry on a rotating ring disc electrode in solutions with different concentrations of sodium bicarbonate. Copper exhibited highest catalytic activity among the materials studied. Nitrate reduction on copper was characterized by two cathodic shoulders on the polarization curve in the potential region of the commencement of hydrogen evolution. In this potential range an anodic current response was observed on the Pt ring electrode identified as nitrite to nitrate oxidation. This indicates that nitrite is an intermediate product during nitrate reduction. These conclusions were verified by batch electrolysis using a plate electrode electrochemical cell. Copper and nickel, materials representing the opposite ends of the electrocatalytic activity spectra, were used in batch electrolysis testing.
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收藏
页码：1185 / 1193
页数：9
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