Study on the polarographic catalytic wave of the system cobalt(II)‐dimethylglyoxime | Zendy

YaMing Ni | Zendy; Ling Li | Zendy; Chun Zhou | Zendy; XiaoXia Gao | Zendy

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Study on the polarographic catalytic wave of the system cobalt(II)‐dimethylglyoxime

Author(s) -

YaMing Ni,

Ling Li,

Chun Zhou,

XiaoXia Gao

Publication year - 1987

Publication title -

acta chimica sinica english edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.28

H-Index - 41

eISSN - 1614-7065

pISSN - 0256-7660

DOI - 10.1002/cjoc.19870050308

Subject(s) - dimethylglyoxime , chemistry , polarography , cobalt , catalysis , dropping mercury electrode , voltammetry , inorganic chemistry , cyclic voltammetry , adsorption , valence (chemistry) , linear sweep voltammetry , electrode , electrochemistry , organic chemistry

In the cobalt (II)‐dimethylglyoxime‐NH 3 ‐NH 4 Cl (pH 9) system, tne complex Co(II)A 2 exhibits a sensitive polarographic wave. The mechanism of this catalytic wave has been investigated by linear potential sweep voltammetry, cyclic voltammerty and anedic stripping voltammetry. The experimental evidences showed that a zero‐valence “active cobalt” or its complex formed during the irreversible reduction of Co(II)A 2 , which is adsorbed on the mercury electrode surface, and simultaneously DMG is catalytically reduced by this “active cobalt”. The mechanism of this system with the conflicting explanations of a catalytic hydrogen wave or only adsorptive complex wave is discussed.

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