Promoting electrochemical reduction of CO2 to ethanol by B/N-doped sp3/sp2 nanocarbon electrode

Liu, Yanming; Yang, Haolei; Fan, Xinfei; Shan, Bing; Meyer, Thomas J.

doi:10.1016/j.cclet.2021.12.063

Title: Promoting electrochemical reduction of CO₂ to ethanol by B/N-doped sp³/sp² nanocarbon electrode

Journal Article · 27 December 2021 · Chinese Chemical Letters

DOI: https://doi.org/10.1016/j.cclet.2021.12.063 · OSTI ID:2420421

^[1]; Yang, Haolei ^[2]; Fan, Xinfei ^[3];

^[4]; Meyer, Thomas J. ^[4]

Dalian Univ. of Technology (China); Univ. of North Carolina, Chapel Hill, NC (United States); OSTI
Dalian Univ. of Technology (China)
Dalian Maritime Univ. (China)
Univ. of North Carolina, Chapel Hill, NC (United States)

Electrochemical reduction of CO₂ to value-added chemicals holds promise for carbon utilization and renewable electricity storage. However, selective CO₂ reduction to multi-carbon fuels remains a significant challenge. Here, we report that B/N-doped sp³/sp² hybridized nanocarbon (BNHC), consisting of ultra-small nanoparticles with a sp³ carbon core covered by a sp² carbon shell, is an efficient electrocatalyst for electrochemical reduction of CO₂ to ethanol at relatively low overpotentials. CO₂ reduction occurs with a Faradaic efficiency of 58.8%-69.1% for ethanol and acetate production at –0.5 ~ –0.6 V (vs. RHE), among which 51.6%-56.0% is for ethanol. The high selectivity for ethanol is due to the integrated effect of sp³/sp² carbon and B/N doping. Finally, both sp³ carbon and B/N doping contribute to enhanced ethanol production with sp² carbon reducing the overpotential for CO₂ reduction to ethanol.

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Research Organization:: University of North Carolina, Chapel Hill, NC (United States)

Sponsoring Organization:: National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0015739

OSTI ID:: 2420421

Journal Information:: Chinese Chemical Letters, Journal Name: Chinese Chemical Letters Journal Issue: 10 Vol. 33; ISSN 1001-8417

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
B/N-doped sp3/sp2 hybridized nanocarbon
CO2 reduction
Chemistry
Electrocatalysis
Ethanol
Multi-carbon product

Title: Promoting electrochemical reduction of CO2 to ethanol by B/N-doped sp3/sp2 nanocarbon electrode

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Title: Promoting electrochemical reduction of CO₂ to ethanol by B/N-doped sp³/sp² nanocarbon electrode