Effects of the Electrolyte on Electrochemical Reduction of CO2 on Sn Electrode

被引：18
|
作者：
Wu, Jingjie [1 ]
Risalvato, Frank [1 ]
Zhou, Xiao-Dong [1 ]
机构：
[1] Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA
来源：
ELECTROCHEMICAL SYNTHESIS OF FUELS 1 | 2012年 / 41卷 / 33期
基金：
美国国家科学基金会;
关键词：
HIGH-CURRENT DENSITY; CARBON-DIOXIDE; METAL-ELECTRODES; COPPER ELECTRODE; HIGH-PRESSURE; KHCO3; MEDIA; METHANOL; TEMPERATURE; FORMATE; HYDROCARBONS;
D O I：
10.1149/1.3702412
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
This paper discusses the effects of the electrolyte on the selectivity and activity of electrochemical reduction of CO2 on Sn electrode including changes in cation, anion and concentration. The production of formate was quantitatively monitored by H-1 NMR spectroscopy. Both the anion SO42- and the cation Na+ favor higher faradaic efficiency and energy efficiency while HCO3- and K+ enable high rate production of formate. The faradaic efficiency is as high as 69-76% for 0.5 M Na2SO4 in the potential range from -1.5 to -1.7 V vs. SCE. 0.5 M KHCO3 is an optimal electrolyte for high production rate of formate which could reach over 3.8 mu mol min(-1) cm(-2) at potentials of -2.0 V vs. SCE while keeping faradaic efficiency of similar to 63%.
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页码：49 / 60
页数：12
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