Comparison of electrocatalytic reduction of CO2 to HCOOH with different tin oxides on carbon nanotubes

被引：54
作者：
Zhao, Chenchen [1 ,3 ]
Wang, Jianlong [1 ,2 ]
Goodenough, John B. [3 ]
机构：
[1] Tsinghua Univ, INET, Collaborat Innovat Ctr Adv Nucl Energy Technol, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Beijing Key Lab Radioact Wastes Treatment, Beijing 100084, Peoples R China
[3] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2016年 / 65卷
关键词：
Carbon dioxide; Formic acid; Electrochemical reduction; Tin oxides; ELECTROCHEMICAL REDUCTION; DIOXIDE; ELECTRODES; DESIGN; ENERGY; SNO2;
D O I：
10.1016/j.elecom.2016.01.019
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A comparative study is reported on the electrocatalytic reduction of CO2 to HCOOH in aqueous alkaline solution with differently prepared tin-oxide particles on multi-walled carbon nanotubes from SnCl2 or SnCl4 precursors. The highest faradaic and energy efficiencies of 64% and 27% were obtained at - 1.40 V vs. SCE with particles that were obtained by KBH4 reduction from a SnCl2 precursor. At lower potentials, competitive reduction reactions occur. A SnCl2 versus SnCl4 precursor favors retention of a Sn(II) valence state in a surface tin oxyhydroxide surface layer. Different morphologies of the particle agglomerates made little difference in the electrocatalytic selectivity and activity. The two SnOx/CNT electrodes both showed a current density retention of similar to 70% after a 20-h electrolysis. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：9 / 13
页数：5
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