Kinetic study of the electrolytic oxidation of manganese(II) to manganese(III) in sulphuric acid
Kinetic study of the electrolytic oxidation of manganese(II) to manganese(III) in sulphuric acid
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DOI：
10.1039/f19837900417
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
A. Kuhn;T. H. Randle
中科院分区：
文献类型：
--
作者：
A. Kuhn;T. H. Randle
研究了锰（II）在旋转氧化覆盖铂盘电极上的氧化，并对玻碳进行了额外的数据研究。还报道了铂电极上锰（III）还原的数据。报道了[MnII]和[MnIII]的反应顺序，以及[SO2-4]的影响，以及氧化过程的当前效率。利用化学分析得到的部分电流值表明，MnII氧化和同时的析氧不是独立进行的，并且试图在没有MnII的情况下通过减去析氧速率来确定前者的速率会导致无效的结果。MnII的氧化动力学是通过在阳极表面形成一层膜来控制的，并考虑了这一过程的作用。
The oxidation of manganese(II) at a rotating oxide-covered platinum disc electrode has been studied, with additional data on glassy carbon. Data for the reduction of manganese(III) at the Pt electrode are also reported. Reaction orders in [MnII] and [MnIII], as well as the effect of [SO2–4], are reported, as is the current efficiency for the oxidation process. It is shown, using partial current values obtained by chemical analysis, that MnII oxidation and the concurrent oxygen evolution do not proceed independently, and attempts to determine the rate of the former by subtraction of the rate of oxygen evolution in the absence of MnII leads to invalid results. The oxidation kinetics of MnII are controlled by formation of a film at the anode surface, and the role of this process is considered.