Dual-active sites design of Sn-x-Sb-y-O-GO nanosheets for enhancing electrochemical CO2 reduction via Sb-accelerating water activation

He, Haichuan ¹Wu, Jian ¹Yu, Xiao ¹Xia, Dan ¹Wang, Yan ¹Chen, Fei ¹Wang, Liqiang ²Wu, Linlin ¹Huang, Jianhan ¹Zhao, Ning ³Deng, Liu ¹Liu, You-Nian¹

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作者信息

1. Cent South Univ
2. Zhengzhou Univ
3. Chinese Acad Sci
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Abstract

Electrochemical CO2 reduction reaction (eCO(2)RR) is a promising approach for the sustainable development of energy and environment, yet the control over selectivity of eCO(2)RR is challenging and entails intelligent active site design. Herein, we firstly propose dual-active sites design of Sn-x-Sb-y-O-GO nanosheets (NSs) for controlling the reaction pathways. The Sn-x-Sb-y-O-GO NSs catalyst possesses large-size ultrathin structure and controllable Sn/Sb ratio, strengthening the interaction at the active site with OCHO* intermediate. The optimized Sn-7-Sb-3-O-GO NSs exhibit a HCOOH selectivity of 96.5% and partial current density of -21.6 mA cm(-2). The experiments and theory calculations show that the introduction of Sb secondary active site can accelerate water activation for forming unique *H species and the binding strength of OCHO* key intermediates, thereby enhancing the HCOOH selectivity in eCO(2)RR. This work lends credence to the novel metal-metal dual-active sites design strategy for eCO(2)RR sustainable energy conversion.

Key words

Dual-active site/Carbon dioxide reduction/Sn-/Sb-based electrocatalyst/Formic acid/CARBON-DIOXIDE ELECTROREDUCTION/EFFICIENT/ELECTROCATALYST/CONVERSION/NANOWIRES

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量7

参考文献量48

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