Electrochemical reduction of CO2 on core-shell Cu/Au nanostructure arrays for syngas production

Kun Chen; Xinyi Zhang; Tim Williams; Laure Bourgeois; Douglas R. MacFarlane

doi:10.1016/j.electacta.2017.04.019

Electrochemical reduction of CO₂ on core-shell Cu/Au nanostructure arrays for syngas production

Kun Chen, Xinyi Zhang, Tim Williams, Laure Bourgeois, Douglas R. MacFarlane^*

^*Corresponding author for this work

Monash University

Research output: Contribution to journal › Article › peer-review

62 Citations (Scopus)

Abstract

Electrocatalytically converting CO₂ to hydrocarbons is a very attractive way to use the excess electricity generated from renewable energies. In this paper, we report the electrochemical reduction of CO₂ based on Cu nanowire arrays. The Cu nanostructured electrode shows much higher current density than polycrystalline Cu. By sputter coating a thin layer of Au on the Cu nanowires, the Faradaic efficiency (FE) of CO can exceed 30%. At an overpotential of 540 mV with respect to the formation of CO, the Cu/Au core-shell nanowire array electrode catalyses the formation of syngas, a very useful gas mixture, with a stable CO/H₂ ratio.

Original language	English
Pages (from-to)	84-89
Number of pages	6
Journal	Electrochimica Acta
Volume	239
DOIs	https://doi.org/10.1016/j.electacta.2017.04.019
Publication status	Published - 10 Jun 2017
Externally published	Yes

Keywords

CO reduction
core-shell Cu/Au nanostructures
faradaic efficiency
syngas

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.electacta.2017.04.019

Cite this

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title = "Electrochemical reduction of CO2 on core-shell Cu/Au nanostructure arrays for syngas production",

abstract = "Electrocatalytically converting CO2 to hydrocarbons is a very attractive way to use the excess electricity generated from renewable energies. In this paper, we report the electrochemical reduction of CO2 based on Cu nanowire arrays. The Cu nanostructured electrode shows much higher current density than polycrystalline Cu. By sputter coating a thin layer of Au on the Cu nanowires, the Faradaic efficiency (FE) of CO can exceed 30%. At an overpotential of 540 mV with respect to the formation of CO, the Cu/Au core-shell nanowire array electrode catalyses the formation of syngas, a very useful gas mixture, with a stable CO/H2 ratio.",

keywords = "CO reduction, core-shell Cu/Au nanostructures, faradaic efficiency, syngas",

author = "Kun Chen and Xinyi Zhang and Tim Williams and Laure Bourgeois and MacFarlane, {Douglas R.}",

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AU - Chen, Kun

AU - Zhang, Xinyi

AU - Williams, Tim

AU - Bourgeois, Laure

AU - MacFarlane, Douglas R.

PY - 2017/6/10

Y1 - 2017/6/10

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AB - Electrocatalytically converting CO2 to hydrocarbons is a very attractive way to use the excess electricity generated from renewable energies. In this paper, we report the electrochemical reduction of CO2 based on Cu nanowire arrays. The Cu nanostructured electrode shows much higher current density than polycrystalline Cu. By sputter coating a thin layer of Au on the Cu nanowires, the Faradaic efficiency (FE) of CO can exceed 30%. At an overpotential of 540 mV with respect to the formation of CO, the Cu/Au core-shell nanowire array electrode catalyses the formation of syngas, a very useful gas mixture, with a stable CO/H2 ratio.

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KW - core-shell Cu/Au nanostructures

KW - faradaic efficiency

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