SnSe2 Nanorods on Carbon Cloth as a Highly Selective, Active, and Flexible Electrocatalyst for Electrochemical Reduction of CO2 into Formate

Beibei He, Lichao Jia, Yuexiao Cui, Wei Zhou, Jian Sun, Jianmei Xu, Qing Wang, Ling Zhao

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Abstract

Electrochemical reduction reaction of CO2 (CO2RR) into value-added products, such as formate, is a fascinating strategy for a carbon-neutral cycle. However, the pursuit of highly selective, energetic efficient, and robust electrocatalysts is a prerequisite for its implementation. Herein, SnSe2 nanorods supported on carbon cloth (CC) is proposed to selectively and efficiently electrochemical reduce CO2 into formate. The integrated SnSe2@CC electrocatalyst is prepared by a combination of hydrothermal reaction and selenylation. Notably, this electrocatalyst is capable of generating formate with a considerable current density of 12.0 mA cm-2 and a high formate faradaic efficiency of 88.4% at a low potential of -0.76 V (vs RHE), which rivals most of Sn-based electrocatalysts toward formate formation. Density functional theory calculations reveal that the reaction pathway involving *OCOH intermediate is energetically feasible. Moreover, the SnSe2@CC electrocatalyst also demonstrates a good durability and flexibility. This experimental and theoretical study may provide a perspective on a promising class of high performance and flexible electrocatalysts for CO2RR.

Original languageEnglish (US)
Pages (from-to)7655-7662
Number of pages8
JournalACS Applied Energy Materials
Volume2
Issue number10
DOIs
StatePublished - Oct 28 2019

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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