Cited by 122CO2 Reduction Techniques and CatalystsElectrocatalysts for Energy ConversionCatalysts for Methane Reforming

Mechanistic Insights for Low-Overpotential Electroreduction of CO2 to CO on Copper Nanowires

Cao, Liang, Raciti, David, Li, Chenyang, Livi, Kenneth J. T., Rottmann, Paul F., Hemker, Kevin J., Mueller, Tim, Wang, Chao·2017·ACS Catalysis

Abstract

Recent developments of copper (Cu)-based nanomaterials have enabled the electroreduction of CO 2 at low overpotentials. The mechanism of low-overpotential CO 2 reduction on these nanocatalysts, however, largely remains elusive. We report here a systematic investigation of CO 2 reduction on highly dense Cu nanowires, with the focus placed on understanding the surface structure effects on the formation of *CO (* denotes an adsorption site on the catalyst surface) and the evolution of gas-phase CO product (CO(g)) at low overpotentials (more positive than −0.5 V). Cu nanowires of distinct nanocrystalline and surface structures are studied comparatively to build up the structure–property relationships, which are further interpreted by performing density functional theory (DFT) calculations of the reaction pathway on the various facets of Cu. A kinetic model reveals competition between CO(g) evolution and *CO poisoning depending on the electrode potential and surface structures. Open and metastable facets such as (110) and reconstructed (110) are found to be likely the active sites for the electroreduction of CO 2 to CO at the low overpotentials.

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Crossref · 10.1021/acscatal.7b03107

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Authors
Cao, L., Raciti, D., Li, C., Livi, K. J. T., Rottmann, P. F., Hemker, K. J., Mueller, T., & Wang, C.
Affiliations
Johns Hopkins University (US)
Corresponding author
  • Mueller, Tim
  • Wang, Chao
Venue
ACS Catalysis
Published
2017-11-17
Volume
7
Issue
12
Pages
8578-8587
ISSN
2155-5435 (ISSN-L)
OpenAlex
W2767984731
Cited by
122
References
49
Citations by year
2026: 4 · 2025: 12 · 2024: 5 · 2023: 9 · 2022: 15 · 2021: 19 · 2020: 27 · 2019: 17 · 2018: 14
FWCI
4.24
Type
journal article
Language
en
Open access
closed
Locations
ACS Catalysis (publishedVersion)
Funders
  • Division of Chemistry (1437396)
  • Basic Energy Sciences (DE-FG02-07ER46437)
  • Johns Hopkins University
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, copper nanowires, low overpotential, reaction mechanism, CO adsorption, CO poisoning, surface structure effects, kinetic model, structure-property relationships, nanocrystalline catalysts

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