Ultrathin Co3O4 Layers Realizing Optimized CO2 Electroreduction to Formate

Angewandte Chemie
Shan GaoYi Xie

Abstract

Electroreduction of CO2 into hydrocarbons could contribute to alleviating energy crisis and global warming. However, conventional electrocatalysts usually suffer from low energetic efficiency and poor durability. Herein, atomic layers for transition-metal oxides are proposed to address these problems through offering an ultralarge fraction of active sites, high electronic conductivity, and superior structural stability. As a prototype, 1.72 and 3.51 nm thick Co3O4 layers were synthesized through a fast-heating strategy. The atomic thickness endowed Co3O4 with abundant active sites, ensuring a large CO2 adsorption amount. The increased and more dispersed charge density near Fermi level allowed for enhanced electronic conductivity. The 1.72 nm thick Co3O4 layers showed over 1.5 and 20 times higher electrocatalytic activity than 3.51 nm thick Co3O4 layers and bulk counterpart, respectively. Also, 1.72 nm thick Co3O4 layers showed formate Faradaic efficiency of over 60% in 20 h.

References

Apr 11, 2009·Nature·Xiaowei XieWenjie Shen
Apr 18, 2012·Journal of the American Chemical Society·Christina W Li, Matthew W Kanan
Sep 13, 2012·Nature Communications·Yongfu SunYi Xie
Nov 23, 2012·Journal of the American Chemical Society·Yihong ChenMatthew W Kanan
Apr 30, 2014·Journal of the American Chemical Society·Fengcai LeiYi Xie
Nov 8, 2014·Journal of the American Chemical Society·Wenlei ZhuShouheng Sun

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Citations

May 18, 2017·Journal of the American Chemical Society·Xingchen JiaoYi Xie
Dec 5, 2017·Advanced Science·Jinghua WuYanguang Li
May 31, 2018·Chemistry, an Asian Journal·Guanghui FengYuhan Sun
Jan 21, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Guodong ShiYing Yu
Apr 8, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Yusheng ZhangXiaoming Sun
Jun 24, 2017·Nanotechnology·Ki Dong YangKi Tae Nam

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