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Mechanistic Insights into the Enhanced Activity and Stability of Agglomerated Cu Nanocrystals for the Electrochemical Reduction of Carbon Dioxide to n-Propanol

Ren, Dan, Wong, Nian Tee, Handoko, Albertus Denny, Huang, Yun, Yeo, Boon Siang·2016·The Journal of Physical Chemistry Letters

Abstract

The reduction of carbon dioxide (CO2) to n-propanol (CH3CH2CH2OH) using renewable electricity is a potentially sustainable route to the production of this valuable engine fuel. In this study, we report that agglomerates of ∼15 nm sized copper nanocrystals exhibited unprecedented catalytic activity for this electrochemical reaction in aqueous 0.1 M KHCO3. The onset potential for the formation of n-propanol was 200-300 mV more positive than for an electropolished Cu surface or Cu(0) nanoparticles. At -0.95 V (vs RHE), n-propanol was formed on the Cu nanocrystals with a high current density (jn-propanol) of -1.74 mA/cm(2), which is ∼25× larger than that found on Cu(0) nanoparticles at the same applied potential. The Cu nanocrystals were also catalytically stable for at least 6 h, and only 14% deactivation was observed after 12 h of CO2 reduction. Mechanistic studies suggest that n-propanol could be formed through the C-C coupling of carbon monoxide and ethylene precursors. The enhanced activity of the Cu nanocrystals toward n-propanol formation was correlated to their surface population of defect sites.

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Metadata

Authors
Ren, D., Wong, N. T., Handoko, A. D., Huang, Y., & Yeo, B. S.
Venue
The Journal of Physical Chemistry Letters
Published
2015-12-10
Volume
7
Issue
1
Pages
20-24
ISSN
1948-7185 (ISSN-L)
OpenAlex
W2306042289
Cited by
279
References
8
FWCI
4.30
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Mechanistic Insights into the Enhanced Activity and Stability of Agglomerated Cu Nanocrystals for the Electrochemical Reduction of Carbon Dioxide to n-Propanol. https://app.cochat.ai/papers/10.1021/acs.jpclett.5b02554
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Ren, D., Wong, N. T., Handoko, A. D., Huang, Y., & Yeo, B. S. (2016). Mechanistic Insights into the Enhanced Activity and Stability of Agglomerated Cu Nanocrystals for the Electrochemical Reduction of Carbon Dioxide to n-Propanol. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/acs.jpclett.5b02554

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