电合成
格式化
还原(数学)
电化学
电极
联轴节(管道)
化学
甲醛
电压
材料科学
催化作用
电气工程
工程类
有机化学
冶金
物理化学
数学
几何学
作者
Mengyu Li,Tehua Wang,Weixing Zhao,Shuangyin Wang,Yuqin Zou
出处
期刊:Nano-micro Letters
[Springer Science+Business Media]
日期:2022-11-01
卷期号:14 (1)
被引量:49
标识
DOI:10.1007/s40820-022-00953-y
摘要
Formate can be synthesized electrochemically by CO2 reduction reaction (CO2RR) or formaldehyde oxidation reaction (FOR). The CO2RR approach suffers from kinetic-sluggish oxygen evolution reaction at the anode. To this end, an electrochemical system combining cathodic CO2RR with anodic FOR was developed, which enables the formate electrosynthesis at ultra-low voltage. Cathodic CO2RR employing the BiOCl electrode in H-cell exhibited formate Faradaic efficiency (FE) higher than 90% within a wide potential range from - 0.48 to - 1.32 VRHE. In flow cell, the current density of 100 mA cm-2 was achieved at - 0.67 VRHE. The anodic FOR using the Cu2O electrode displayed a low onset potential of - 0.13 VRHE and nearly 100% formate and H2 selectivity from 0.05 to 0.35 VRHE. The CO2RR and FOR were constructed in a flow cell through membrane electrode assembly for the electrosynthesis of formate, where the CO2RR//FOR delivered an enhanced current density of 100 mA cm-2 at 0.86 V. This work provides a promising pair-electrosynthesis of value-added chemicals with high FE and low energy consumption.
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