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首页> 外文期刊>RSC Advances >Electrochemical hydrodechlorination of perchloroethylene in groundwater on a Ni-doped graphene composite cathode driven by a microbial fuel cell
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Electrochemical hydrodechlorination of perchloroethylene in groundwater on a Ni-doped graphene composite cathode driven by a microbial fuel cell

机译：微生物燃料电池驱动的镍掺杂石墨烯复合阴极上地下水中全氯乙烯的电化学加氢脱氯

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摘要

Enhancing the activity of the cathode and reducing the voltage for electrochemical hydrodechlorination of chlorohydrocarbon were always the challenges in the area of electrochemical remediation. In this study, a novel cathode material of Ni-doped graphene generated by Ni nanoparticles dispersed evenly on graphene was prepared to electrochemically dechlorinate PCE in groundwater. The reduction potential of Ni-doped graphene for PCE electrochemical hydrodechlorination was ?0.24 V ( vs. Ag/AgCl) determined by cyclic voltammetry. A single MFC with a voltage of 0.389–0.460 V and a current of 0.221–0.257 mA could drive electrochemical hydrodechlorination of PCE effectively with Ni-doped graphene as the cathode catalyst, and the removal rate of PCE was significantly higher than that with single Ni or graphene as the cathode catalyst. Moreover, neutral conditions were more suitable for Ni-doped graphene to electrochemically hydrodechlorinate PCE in groundwater and no byproduct was accumulated.
机译：增强阴极的活性并降低用于氯代烃的电化学加氢脱氯的电压一直是电化学修复领域中的挑战。在这项研究中，制备了一种由均匀分布在石墨烯上的Ni纳米粒子生成的Ni掺杂石墨烯的新型阴极材料，用于对地下水中的PCE进行电化学脱氯。通过循环伏安法测定，Ni掺杂的石墨烯对PCE电化学加氢脱氯的还原电势约为0.24 V（相对于Ag / AgCl）。电压为0.389–0.460 V且电流为0.221–0.257 mA的单个MFC可以有效地驱动以镍掺杂的石墨烯为阴极催化剂的PCE的电化学加氢脱氯，并且PCE的去除率显着高于单个Ni的去除率。或石墨烯作为阴极催化剂。而且，中性条件更适合于掺杂镍的石墨烯对地下水中的PCE进行电化学加氢脱氯，并且没有积累副产物。

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