Closed bipolar electrode for decoupled electrochemical water decontamination and hydrogen recovery
Closed bipolar electrode for decoupled electrochemical water decontamination and hydrogen recovery
复制标题
用于解耦电化学水净化和氢气回收的封闭双极电极
DOI：
10.1016/j.elecom.2019.106611
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发表时间：
2019-12
期刊：
影响因子：
--
通讯作者：
Shijie You
中科院分区：
文献类型：
--
作者：
Cenxin Ma;Shuzhao Pei;Shijie You
为了在使用电化学氧化（EO）过程进行水净化过程中实现氢气的安全回收，我们将阳极氧化和阴极析氢进行解耦，这两个电极是由闭合双极电极上的反应驱动的，其中两个电极位于两个含有[Fe(CN)6]4−/3−作为可溶性电子介体的独立溶液中。随着电流密度增加1-16 mA cm−2，阳极苯酚污染物的去除率从37.28%（k= 0.0039 min−1）增加到96.44%（k= 0.028 min−1），同时阴极产氢量在120 min电解时间内从6.35 mL增加到137.51 mL。回收的氢气库仑效率 (CE) 为 71.77–99.88%，能量效率 (EE) 为 10.48–22.74%。循环伏安法 (CV) 扫描结果证实了水性 [Fe(CN)6]4−/3− 氧化还原对介导 EO/C-BPE 电池中电解的能力。这项研究提供了空间解耦阳极氧化和阴极制氢的概念验证演示，使电化学水净化更加安全、更加经济和更加可持续。
To achieve safe recovery of H2gas during water purification using the electrochemical oxidation (EO) process, we decoupled anodic oxidation and cathodic H2evolution driven by reactions on closed bipolar electrodes with two poles in two separated solutions containing [Fe(CN)6]4−/3−as a soluble electron mediator. With increased current density of 1–16 mA cm−2, the anodic removal of phenol pollutant was increased from 37.28% (k= 0.0039 min−1) to 96.44% (k= 0.028 min−1), and meanwhile the cathodic H2production was increased from 6.35 mL to 137.51 mL within 120-min electrolysis. The H2gas was recovered at a coulombic efficiency (CE) of 71.77–99.88% and energy efficiency (EE) of 10.48–22.74%. The cyclic voltammetry (CV) scan results confirmed the capability of aqueous [Fe(CN)6]4−/3−redox couple to mediate electrolysis in the EO/C-BPE cell. This study provides a proof-in-concept demonstration of a spatially decoupled anodic oxidation and cathodic H2production, making electrochemical water purification more secure, more economical and more sustainable.
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影响因子：
2.2
作者：
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影响因子：
6.7
作者：
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通讯作者：
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