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Semimetal 1H‐SnS 2 Enables High‐Efficiency Electroreduction of CO 2 to CO
Author(s) -
Xu Jie,
Lai Shuhua,
Hu Min,
Ge Shangmeng,
Xie Ruicong,
Li Fan,
Hua Dandan,
Xu Heng,
Zhou Huang,
Wu Rui,
Fu Jiantao,
Qiu Yuan,
He Jia,
Li Chao,
Liu Haoxuan,
Liu Yifan,
Sun Jiaqiang,
Liu Xijun,
Luo Jun
Publication year - 2020
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.202000567
Subject(s) - selectivity , calcination , semimetal , faraday efficiency , materials science , reversible hydrogen electrode , hydrogen , catalysis , electrode , transition metal , phase (matter) , inorganic chemistry , chemistry , nanotechnology , electrochemistry , optoelectronics , band gap , biochemistry , organic chemistry , reference electrode
Controlling the selectivity of products in CO 2 fixation is essential to obtain desired products using phase engineering. In this study, stable semimetal 1H‐SnS 2 nanosheets are successfully synthesized by hydrogen‐assisted low‐temperature calcination for the first time. Compared with semiconductor 1T‐SnS 2 , the 1H‐SnS 2 exhibits ultrahigh CO selectivity with a Faradaic efficiency of 98.2% at −0.8 V (vs reversible hydrogen electrode) and a partial current density of 10.9 mA cm −2 in the electrocatalytic CO 2 reduction reaction. Theoretical calculations indicate that the *COOH intermediate is more stable on 1H‐SnS 2 surface than 1T‐SnS 2 surface and thus promotes the CO production. This work shows that phase engineering control can be an effective approach to regulate the selectivity of products in CO 2 RR of transition metal dichalcogenides.