Electrochemical Reduction of Bronsted Acids by Glassy Carbon in Acetonitrile-Implications for Electrocatalytic Hydrogen Evolution
Electrochemical Reduction of Bronsted Acids by Glassy Carbon in Acetonitrile-Implications for Electrocatalytic Hydrogen Evolution
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DOI：
10.1021/ic500770k
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发表时间：
2014-08-18
影响因子：
4.6
通讯作者：
Dempsey, Jillian L.
中科院分区：
文献类型：
--
作者：
McCarthy, Brian D.;Martin, Daniel J.;Dempsey, Jillian L.
用于电化学驱动析氢的分子催化剂通常在乙腈中使用玻碳工作电极和布朗斯台德酸进行研究。令人惊讶的是，关于酸在玻璃碳上直接还原的潜力的信息很少。这项工作通过循环伏安法检查乙腈中玻碳电极上的酸电还原。 20 种酸的还原电位范围超过 2 V。尽管观察到某些酸的电流增强，但未发现添加 100 mM 水会改变所研究的任何酸的还原电位。报告的数据为选择电催化实验中使用的酸提供了指导，以避免直接电极还原。
Molecular catalysts for electrochemically driven hydrogen evolution are often studied in acetonitrile with glassy carbon working electrodes and Bronsted acids. Surprisingly, little information is available regarding the potentials at which acids are directly reduced on glassy carbon. This work examines acid electroreduction in acetonitrile on glassy carbon electrodes by cyclic voltammetry. Reduction potentials, spanning a range exceeding 2 V, were found for 20 acids. The addition of 100 mM water was not found to shift the reduction potential of any acid studied, although current enhancement was observed for some acids. The data reported provides a guide for selecting acids to use in electrocatalysis experiments such that direct electrode reduction is avoided.