Nitrite oxidation on RuO2 electrodes

被引：1

作者：

Amadelli, R. ^{[1
,2
]}

De Battisti, A. ^{[1
,2
]}

Doubova, L. ^{[3
]}

Velichenko, A. B. ^{[4
]}

机构：

[1] Univ Ferrara, ISOF, CNR, Sez Ferrara, I-35127 Padua, Italy

[2] Univ Ferrara, Dipartimento Chim, I-35127 Padua, Italy

[3] IENI, CNR, I-35127 Padua, Italy

[4] Ukrainian State Chem Technol Univ, Dept Phys Chem, UA-320005 Dnepropetrovsk, Ukraine

来源：

RUSSIAN JOURNAL OF ELECTROCHEMISTRY | 2008年 / 44卷 / 01期

关键词：

nitrite; ruthenium dioxide; electrocatalysis;

D O I：

10.1134/S1023193508010187

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

An electrochemical kinetic investigation of nitrite oxidation to nitrate on RuO2 is discussed. The process is studied by cyclic voltammetry, steady-state measurements and potential step measurements. The overall oxidation reaction is a two-electron process where the first step involves a reversible charge transfer: NO2- double left right arrow NO2 + e(-) The one-electron oxidation of nitrite yields adsorbed NO2 which is further oxidized to adsorbed (NO2)(+) and subsequently desorbed via a chemical reaction. In the general case, fit of experimental data is obtained with adsorption described by a Temkin isotherm unless the electrode is pre-treated at a cathodic potential where the (NO2)(ads) is removed. This treatment lowers the degree of coverage by intermediates but not the nature of the slow step.

引用

页码：131 / 137

页数：7

共 61 条

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