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Versatile, Transferrable 3-Dimensionally-Nanofabricated Au Catalysts with High-Index Crystal Planes for Highly Efficient and Robust Electrochemical CO2 Reduction

Abstract

Considerable interest has been shown in electrochemical CO2 reduction reaction (CO2RR) for transforming CO2 into other value-added carbonaceous products such as CO. In this work, we present multi-stacked Au nanowires arrays (MS-Au) with tailored active reaction sites and controlled 3-dimentional structures by oblique angle deposition and sequential solvent-assisted nanotransfer printing method (S-nTP) for highly selective and efficient electrochemical CO2RR activity. Our MS-Au nanowires exhibit high CO2RR activity in wide range of overpotential from 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, S-nTP allows versatile transferability of MS-Au nanowires on a gas diffusion electrode in a flow reactor to maximize CO evolution with exceptional mass activity of ~172.66 A g-1 at only 80mV overpotential.

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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, Accepted Manuscript

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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, Y. J. Kim, S. Yim, Y. S. Jung and J. Oh, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C8TA12242C

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