EFFECT OF NONSTOICHIOMETRY ON THE ELECTROCHEMICAL-BEHAVIOR OF CHALCOCITE

被引：8

作者：

GOMEZ, H ^{[1
]}

VEDEL, J ^{[1
]}

CORDOVA, R ^{[1
]}

SCHREBLER, R ^{[1
]}

BASAEZ, L ^{[1
]}

机构：

[1] ECOLE NATL SUPER CHIM, ELECTROCHIM & CHIM ANALYT LAB, CNRS UNITE, F-75231 PARIS 05, FRANCE

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1995年 / 388卷 / 1-2期

关键词：

CHALCOCITE; VOLTAMMETRY; NONSTOICHIOMETRY;

D O I：

10.1016/0022-0728(95)03882-H

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The influence of non-stoichiometry in the voltammetric response of natural chalcocite electrodes in berate and berate ethyl xanthate solution has been investigated. Surface composition was controlled by short circuiting the mineral to a copper electrode for enough time to attain different non-stoichiometric ratios. Voltammograms recorded afterwards reveal different current contributions that can be correlated with a defined composition. Photovoltammetric curves also exhibit composition dependence allowing us thus to correlate semiconductor properties with copper sulphide composition. Non-stoichiometry also affects chemisorption of xanthate as well as the nature of the electro-oxidation products formed at more oxidizing potentials.

引用

页码：81 / 88

页数：8

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