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

页码：9 / 13

页数：5

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