Electrochemical reduction characteristics of nitro-benzene compounds at the copper electrode and the influence of pH on reduction

The electrochemical reduction characteristics of nitro-benzene compounds were investigated using cyclic voltammetry technique. The reductive reactivity of the nitro-benzene compounds at the copper electrode was evaluated, the reduction mechanisms of the nitrobenzene compounds at the copper electrode...

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Bibliographic Details
Published inHuanjing kexue Vol. 26; no. 2; p. 102
Main Authors Xu, Wen-ying, Fan, Jin-hong, Gao, Ting-yao
Format Journal Article
LanguageChinese
Published China 01.03.2005
Subjects
Catalysis
Copper - chemistry
Electrochemistry
Electrodes
Hydrogen-Ion Concentration
Nitrobenzenes - chemistry
Oxidation-Reduction
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Summary:The electrochemical reduction characteristics of nitro-benzene compounds were investigated using cyclic voltammetry technique. The reductive reactivity of the nitro-benzene compounds at the copper electrode was evaluated, the reduction mechanisms of the nitrobenzene compounds at the copper electrode and the influences of pH on them were also discussed in this paper. The experimental results show that nitro-benzene compounds is capable of reducing directly at the copper electrode, and the reduction peaks were at - 0.58V and - 1.32V or so (vs. SCE). Both acidity and basicity favor reduction of nitro-group at the copper electrode: the elimination reaction is easy to occur in the alkaline medium with the formation of nitroso-group; in the acid medium the probability of the reaction between the obtained electrons nitro group and hydrogen ions raises, which causes magnification of the current through the solution; in addition, the growth of hydrogen atoms in number favors the occurring of the addition and substitut
ISSN:0250-3301