Cited by 860CO2 Reduction Techniques and CatalystsElectrocatalysts for Energy ConversionCatalysts for Methane Reforming

Active and Selective Conversion of CO 2 to CO on Ultrathin Au Nanowires

Zhu, Wenlei, Zhang, Yin-Jia, Zhang, Hongyi, Lv, Haifeng, Li, Qing, Michalsky, Ronald, Peterson, Andrew A., Sun, Shouheng·2014·Journal of the American Chemical Society

Abstract

In this communication, we show that ultrathin Au nanowires (NWs) with dominant edge sites on their surface are active and selective for electrochemical reduction of CO2 to CO. We first develop a facile seed-mediated growth method to synthesize these ultrathin (2 nm wide) Au NWs in high yield (95%) by reducing HAuCl4 in the presence of 2 nm Au nanoparticles (NPs). These NWs catalyze CO2 reduction to CO in aqueous 0.5 M KHCO3 at an onset potential of -0.2 V (vs reversible hydrogen electrode). At -0.35 V, the reduction Faradaic efficiency (FE) reaches 94% (mass activity 1.84 A/g Au) and stays at this level for 6 h without any noticeable activity change. Density functional theory (DFT) calculations suggest that the excellent catalytic performance of these Au NWs is attributed both to their high mass density of reactive edge sites (≥16%) and to the weak CO binding on these sites. These ultrathin Au NWs are the most efficient nanocatalyst ever reported for electrochemical reduction of CO2 to CO.

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Crossref · 10.1021/ja5095099

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  • A strong correlation between binding energies of various reaction intermediates on transition metals and a lack of ability to independently control them poses a significant intrinsic limitation in developing suitable catalysts for large-scale commercialization of the CO2 reduction reaction.

    “general understanding at present is that a strong correlation between binding energies of various reaction intermediates on transition metals and a lack of ability to independently control them poses a significant intrinsic limitation in developing suitable catalysts for large-scale commercialization of the CO2 reduction reaction.”

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Research works printed but not linked: 1

  1. Enkovaara J., 2010, J. Phys.: Condens. Matter, 22, 253202

Cited by

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Authors
Zhu, W., Zhang, Y.-J., Zhang, H., Lv, H., Li, Q., Michalsky, R., Peterson, A. A., & Sun, S.
Affiliations
Brown University (US)
Corresponding author
  • Peterson, Andrew A.
  • Sun, Shouheng
Venue
Journal of the American Chemical Society
Published
2014-11-11
Volume
136
Issue
46
Pages
16132-16135
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2334092527
Cited by
860
References
30
Citations by year
2026: 12 · 2025: 37 · 2024: 55 · 2023: 59 · 2022: 84 · 2021: 97 · 2020: 129 · 2019: 116 · 2018: 102 · 2017: 82 · 2016: 52 · 2015: 35
FWCI
17.49
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
Funders
Division of Chemistry
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
Keywords
electrochemical CO2 reduction, CO2 to CO conversion, edge sites, seed-mediated growth, gold nanoparticles, Faradaic efficiency, CO binding energy, nanocatalysts, density functional theory

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