The anodic passivation of carbon electrodes

被引：0
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作者：
Ya I. Tur’yan
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来源：
Journal of Solid State Electrochemistry | 2015年 / 19卷
关键词：
Anodic passivation; Electro-oxidation; Oligomerization; Carbon electrode; Triquinoyl; Standard potential; Voltammetric analysis; Fuel cells; Hydrogen generators;
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暂无
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摘要：
Based on literature data, the mechanism of anodic passivation of carbon electrodes is discussed. It is proposed that the first step of the anodic passivation process involves the electro-oxidation of carbon to CO(g), while the second step involves the parallel reactions of electro-oxidation of CO(g) to CO2(g), and oligomerization of CO(g) to C6O6(aq) [triquinoyl]. The standard redox potential for C6O6(aq)/6C is calculated to be +0.77 V, which is consistent with the observed passivation of carbon in the potential range of +1.0 to +1.7 V (vs. NHE).
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页码：321 / 323
页数：2
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