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Surface Modification of Tin Dioxide via (Bi, S) Co‐Doping for Photoelectrocatalytic Reduction of CO 2 to Formate
Author(s) -
Li Yupeng,
Yang Huimin,
Hu Xueyan,
Tian Haoyang,
Gao Mengting,
Zhang Dingding,
Li Zhifang,
Yang Donghua
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201900854
Subject(s) - overpotential , formate , catalysis , faraday efficiency , bismuth , materials science , doping , electrochemistry , tin dioxide , tin , inorganic chemistry , photocatalysis , chemical engineering , nanotechnology , electrode , chemistry , optoelectronics , metallurgy , organic chemistry , engineering
Photoelectrocatalytic reduction of CO 2 into useful fuels is a promising approach in terms of climate challenge and energy crisis. In this paper, a novel SnO 2 ‐based catalyst doped with bismuth (Bi) and sulfur (S) was synthesized via a simple hydrothermal method for photoelectrocatalytic reduction of CO 2 . The as‐prepared catalyst demonstrates higher catalytic capability for CO 2 , in which the faradaic efficiency of formate reaches 55.6 % at an overpotential as low as ∼360 mV and the maximum current density is close to 9.33 mA.cm −2 at −1.4 vs Ag/AgCl with the doping ratio of 3 %, which is three times higher than pure SnO 2 . Meanwhile, the catalyst is more easily excited by visible light to reduce CO 2 due to the narrowing of band gap. The notable electrocatalytic performance for CO 2 reduction may be attributed to the defect caused by doping of Bi 3+ and S 2− into the lattice structure by replacing, respectively, Sn 4+ and O 2− . The catalyst may provide a novel strategy to promote the development of electrochemical reduction of CO 2 .