Tin-based metal organic framework catalysts for high-efficiency electrocatalytic CO2 conversion into formate

Xuanyu Wang; Yanhong Zou; Yanxing Zhang; Barbara Marchetti; Yuyu Liu; Jin Yi; Xiao-Dong Zhou; Jiujun Zhang

doi:10.1016/j.jcis.2022.07.008

Tin-based metal organic framework catalysts for high-efficiency electrocatalytic CO₂ conversion into formate

J Colloid Interface Sci. 2022 Nov 15:626:836-847. doi: 10.1016/j.jcis.2022.07.008. Epub 2022 Jul 4.

Authors

Xuanyu Wang¹, Yanhong Zou¹, Yanxing Zhang², Barbara Marchetti³, Yuyu Liu⁴, Jin Yi¹, Xiao-Dong Zhou⁵, Jiujun Zhang¹

Affiliations

¹ Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, China.
² School of Physics, Henan Normal University, Xinxiang, Henan 453007, China.
³ Institute for Materials Research and Innovation, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
⁴ Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, China. Electronic address: liuyuyu@shu.edu.cn.
⁵ Institute for Materials Research and Innovation, University of Louisiana at Lafayette, Lafayette, LA 70504, USA. Electronic address: dong.zhou@louisiana.edu.

PMID: 35820218
DOI: 10.1016/j.jcis.2022.07.008

Abstract

Electrochemical reduction of carbon dioxide (ERCO₂) allows for the conversion of CO₂ to value-added low-carbon chemicals. Catalysts are indispensable for an efficient ERCO₂ process. In this work, a Sn-based metal-organic framework (Sn-MOF) was synthesized as an electrocatalyst for the conversion of CO₂ to formate (HCOO^-). Such a Sn-MOF electrocatalyst exhibits an outstanding performance with a formate selectivity up to 92% and a current density of 23.2 mA cm^-2 at -1.2 V_RHE. Density functional theory calculations were used to probe and analyze the catalytic ERCO₂ mechanism. This work shows the possibility to achieve a high efficiency of a pure Sn-MOF in catalyzing ERCO₂ directly. In addition, this work provides insights into the design and synthesis of highly efficient ERCO₂ electrocatalysts for practical applications.

Keywords: CO(2); Electrocatalysis; Metal–organic framework; Sn-based catalysts.