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Selective Electroreduction of Carbon Dioxide over SnO 2 ‐Nanodot Catalysts
Author(s) -
Hu Congling,
Li Lulu,
Deng Wanyu,
Zhang Gong,
Zhu Wenjin,
Yuan Xintong,
Zhang Lei,
Zhao ZhiJian,
Gong Jinlong
Publication year - 2020
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202000557
Subject(s) - syngas , formate , electrochemistry , catalysis , chemical engineering , materials science , electrolysis , chemistry , inorganic chemistry , nanotechnology , electrode , electrolyte , organic chemistry , engineering
The development of electrochemical CO 2 conversion allows green carbon utilization. Formate and syngas are two typical products of electrochemical CO 2 reduction, and the coproduction of these two products will maximize the energy efficiency of CO 2 conversion. However, few works have successfully achieved the cogeneration of formate and syngas. This paper describes a novel strategy to maximize the efficiency of CO 2 conversion through coproduction of formate and syngas on ultrasmall SnO 2 nanodots (NDs) homogeneously anchored on carbon nanotubes (CNT#SnO 2 NDs) electrodes. The CNT#SnO 2 NDs not only decreased the adsorption energy of *OCHO but also reduced the adsorption energy difference of *COOH and *H. High energy efficiency toward formate and adjustable H 2 /CO ratio were obtained over a broad potential window with long‐term stability. In addition, CNT#SnO 2 NDs and Ir foil were coupled together to construct an electrolyzer for electrochemical CO 2 reduction reaction and oxygen evolution reaction (CO 2 ERR–OER), which also produced formate and syngas with 24 h stability. A promising approach is presented for the electrochemical CO 2 conversion in fuel production.