Kinetics and mechanism of the cerium(IV)/cerium(III) redox reaction on a platinum electrode
Kinetics and mechanism of the cerium(IV)/cerium(III) redox reaction on a platinum electrode
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铂电极上铈(IV)/铈(III)氧化还原反应的动力学和机理
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
A. Kuhn
中科院分区：
文献类型：
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作者：
T. H. Randle;A. Kuhn
报道了硫酸中 Pt 电极上 CeIV/CeIII 氧化还原反应的氧化和还原动力学。与之前报道的研究相反，电极表面氧化铂的厚度是标准化的。提供了电流效率数据、伏安图和 Allen-Hickling 图，并检查了 [H+]、[SO2–4] 和 [CeIII]、[CeIV] 中的反应顺序。有证据表明，该机制并不简单：迄今为止所假设的Ce4++ e–→ Ce3+，而是涉及复杂的中间物质，最有可能是硫酸根络合物。
The oxidation and reduction kinetics of the CeIV/CeIII redox reaction at a Pt electrode in sulphuric acid are reported. In contrast to previously reported studies, the thickness of platinum oxide on the electrode surface was standardised. Current efficiency data, voltammograms and Allen–Hickling plots are presented, and the reaction order in [H+], [SO2–4] and [CeIII], [CeIV] is examined. Evidence is presented to suggest that the mechanism is not the simple: Ce4++ e–→ Ce3+ which has hitherto been assumed, but rather that complex intermediate species, most probably sulphato complexes, are involved.