Abstract The dehalogenation of gaseous chlorobenzene (CB) to useful intermediates at ambient temperature is desirable. In this study, gaseous CB was dehalogenated to useful intermediates using an electrochemically generated homogeneous low-valent electron mediator in an electroscrubbing column at ambient temperature. A homogenous electron mediator [Ni(I)(CN)4]3− (Ni(I) low-valent) was generated at the cathodic half-cell using a membrane-divided electrolytic cell and quantified by oxidation/reduction potential (ORP) variations with a potentiometric titration. CB removal according to a mediated electrocatalytic reduction (MER) process, was confirmed by the change in electrogenerated Ni(I) from 4.2 mM to 2.8 mM during the degradation of CB. A Fourier transform infrared gas analyzer and chlorine sensor showed that 100% of 15 ppm CB at a 0.2 L min−1 flow rate had been removed by the MER process with CO2 as the gaseous product. At the same time, the phenoxide anion was found in the resulting solutions, which is a starting material in many pharmaceutical industries. The developed method and possible generation of a homogenous electron mediator on CB dehalogenation to useful intermediates at ambient temperature is a practical technology.

中文翻译：

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通过电洗涤将气态氯苯一致的室温电化学还原为增值中间体

摘要 在环境温度下将气态氯苯 (CB) 脱卤为有用的中间体是理想的。在这项研究中，在环境温度下，在电洗涤柱中使用电化学生成的均相低价电子介体将气态 CB 脱卤为有用的中间体。均质电子介体 [Ni(I)(CN)4]3−（Ni(I) 低价）使用膜分隔电解池在阴极半电池中生成，并通过氧化/还原电位 (ORP) 进行量化电位滴定的变化。根据介导的电催化还原 (MER) 过程，CB 的去除通过在 CB 降解期间电生成的 Ni(I) 从 4.2 mM 到 2.8 mM 的变化得到证实。傅里叶变换红外气体分析仪和氯传感器显示 100% 的 15 ppm CB 在 0. 2 L min-1 流速已通过 MER 工艺去除，CO2 作为气态产物。同时，在所得溶液中发现了酚盐阴离子，这是许多制药行业的原料。开发的方法和在环境温度下 CB 脱卤为有用中间体时可能产生的均质电子介体是一项实用技术。