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Engineering Electronic Structure of Stannous Sulfide by Amino‐Functionalized Carbon: Toward Efficient Electrocatalytic Reduction of CO 2 to Formate
Author(s) -
Chen Zhipeng,
Zhang Xinxin,
Jiao Mingyang,
Mou Kaiwen,
Zhang Xiangping,
Liu Licheng
Publication year - 2020
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201903664
Subject(s) - overpotential , formate , materials science , density functional theory , catalysis , sulfide , tin , carbon fibers , inorganic chemistry , faraday efficiency , carbon nanotube , chemical engineering , electrochemistry , chemistry , nanotechnology , electrode , computational chemistry , organic chemistry , composite material , composite number , metallurgy , engineering
Engineering electronic structure to enhance the binding energies of reaction intermediates in order to achieve a high partial current density can lead to increased yield of target products. Herein, amino‐functionalized carbon is used to regulate the electronic structure of tin‐based catalysts to enhance activity of CO 2 electroreduction. The hollow nanotubes composed of SnS (stannous sulfide) nanosheets are modified with amino‐functionalized carbon layers, achieving a highest formate Faraday efficiency of 92.6% and a remarkable formate partial current density of 41.1 mA cm −2 (a total current density of 52.1 mA cm −2 ) at a moderate overpotential of 0.9 V versus reversible hydrogen electrode, as well as a good stability. Density functional theory calculations demonstrate that the superior activity is attributed to the synergistic effect among SnS and Aminated‐C in increasing the adsorption energies of the key intermediates and accelerating the charge transfer rate.