Partial sulfuration-induced defect and interface tailoring on bismuth oxide for promoting electrocatalytic CO2 reduction

Xuxiao Yang; Peilin Deng; Dongyu Liu; Shuang Zhao; Dan Li; Hu Wu; Yaming Ma; Bao Yu Xia; Mingtao Li; Chunhui Xiao; Shujiang Ding

doi:10.1039/C9TA11363K

Partial sulfuration-induced defect and interface tailoring on bismuth oxide for promoting electrocatalytic CO₂ reduction†

Xuxiao Yang,‡^a Peilin Deng,‡^c Dongyu Liu,‡^b Shuang Zhao,^a Dan Li,^a Hu Wu,^a Yaming Ma,^a Bao Yu Xia,

*^c Mingtao Li,*^b Chunhui Xiao

*^a and Shujiang Ding^a

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* Corresponding authors

^a Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xianning West Road, Xi'an 710049, China
E-mail: chunhuixiao@xjtu.edu.cn

^b International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xianning West Road, Xi'an 710049, China
E-mail: mingtao@mail.xjtu.edu.cn

^c Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, PR China
E-mail: byxia@hust.edu.cn

Abstract

Defect and interface engineering is a powerful strategy to tune the electronic structure and adsorption behavior of electrocatalysts, boosting the performance of the electrocatalytic CO₂ reduction reaction (eCO₂RR). Herein, we construct a hybrid electrocatalyst, Bi₂S₃–Bi₂O₃@rGO, with a large amount of defects (oxygen vacancies etc.) and a specific interface between bismuth sulfide (Bi₂S₃) and bismuth oxide (Bi₂O₃) by a partial precipitation conversion method. Both experimental results and theoretical calculations reveal that the Bi₂S₃–Bi₂O₃ interface drastically lowers the formation energy of HCOO*, in favor of the production of formate (HCOOH) over CO, promoting the conversion of CO₂ to HCOOH. The as-prepared electrocatalyst shows excellent electrocatalytic activity to generate HCOOH with a high faradaic efficiency of over 90% and a low overpotential of 700 mV, as well as excellent durability for more than 24 h.

Journal of Materials Chemistry A

Partial sulfuration-induced defect and interface tailoring on bismuth oxide for promoting electrocatalytic CO₂ reduction†

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Partial sulfuration-induced defect and interface tailoring on bismuth oxide for promoting electrocatalytic CO₂ reduction

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Journal of Materials Chemistry A