Faculty of Advanced Technology and Chemistry, Institute of Materials Science and Engineering, Military University of Technology, Kaliskiego 2, 00908 Warszawa, Poland.
Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30387 Krakow, Poland.
Molecules. 2021 Jan 20;26(3):525. doi: 10.3390/molecules26030525.
Herein, we report, for the first time, a comparative study on the electrocatalytic reduction of chloroform on silver in different aqueous supporting electrolytes. Cyclic voltammetry measurements were performed at a wide range of scan rates and concentrations of CHCl using 0.05 M NaClO, NaHPO4, and NaHPO as supporting electrolytes. We observed that a type of supporting electrolyte anion strongly influences both the potential as well as the current density of the chloroform reduction peak, mainly due to the presence of OH in an alkaline NaHPO solution, which is a specifically interacting anion. Moreover, the highest sensitivity of the Ag electrode toward CHCl reduction was observed in a neutral NaClO aqueous solution. It was found that the electroreduction of chloroform at the silver surface occurs via a concerted mechanism regardless of the type of the studied supporting electrolyte.
在此，我们首次报道了在不同水相支持电解质中银对三氯甲烷电催化还原的对比研究。使用 0.05 M NaClO、NaHPO 和 NaHPO 作为支持电解质，在较宽的扫描速率和 CHCl 浓度范围内进行了循环伏安法测量。我们观察到，支持电解质阴离子的类型强烈影响三氯甲烷还原峰的电位和电流密度，这主要是由于在碱性 NaHPO 溶液中存在 OH，它是一种特殊的相互作用阴离子。此外，在中性 NaClO 水溶液中，Ag 电极对 CHCl 还原的灵敏度最高。结果发现，无论研究的支持电解质类型如何，三氯甲烷在银表面的电化学还原均通过协同机制进行。
