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Issue 11, 2019
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Versatile, transferrable 3-dimensionally nanofabricated Au catalysts with high-index crystal planes for highly efficient and robust electrochemical CO2 reduction

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Abstract

Considerable interest has been shown in the electrochemical CO2 reduction reaction (CO2RR) for transforming CO2 into other value-added carbonaceous products such as CO. In this work, we prepared multi-stacked Au (MS-Au) nanowire arrays with tailored active reaction sites and controlled 3-dimensional structures by oblique angle deposition and a sequential solvent-assisted nanotransfer printing (S-nTP) method for highly selective and efficient electrochemical CO2RR. Our MS-Au nanowires exhibit high CO2RR activity in a wide range of overpotentials due to the electrochemically active high index grain faces and high grain boundary density and by controlling local reaction environments. With our 10 layers of MS-Au nanowires, we achieve ∼13 times higher CO2RR geometric current density (jCO) at low overpotential (−0.39 V) compared to the pristine Au thin-film electrode. Finally, the S-nTP method allows versatile transferability of MS-Au nanowires onto a gas diffusion electrode in a flow reactor to maximize CO evolution with an exceptional mass activity of ∼172.66 A g−1 at an overpotential of only 80 mV.

Graphical abstract: Versatile, transferrable 3-dimensionally nanofabricated Au catalysts with high-index crystal planes for highly efficient and robust electrochemical CO2 reduction

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Publication details

The article was received on 19 Dec 2018, accepted on 12 Feb 2019 and first published on 12 Feb 2019


Article type: Paper
DOI: 10.1039/C8TA12242C
Citation: J. Mater. Chem. A, 2019,7, 6045-6052

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    Versatile, transferrable 3-dimensionally nanofabricated Au catalysts with high-index crystal planes for highly efficient and robust electrochemical CO2 reduction

    M. Cho, J. M. Kim, B. Kim, S. Yim, Y. J. Kim, Y. S. Jung and J. Oh, J. Mater. Chem. A, 2019, 7, 6045
    DOI: 10.1039/C8TA12242C

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