Semimetal 1H‐SnS<sub>2</sub> Enables High‐Efficiency Electroreduction of CO<sub>2</sub> to CO
Jie Xu, Shuhua Lai, Min Hu, Shangmeng Ge, Ruicong Xie, Fan Li, Dandan Hua, Heng Xu, Huang Zhou, Rui Wu, Jiantao Fu, Yuan Qiu, Jia He, Chao Li, Haoxuan Liu, Yifan Liu, Jiaqiang Sun, Xijun Liu, Jun Luo
Abstract
Abstract 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.