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Graphene-Coated Copper Nanowire Networks as a Highly Stable Transparent Electrode in Harsh Environments Toward Efficiently Electrocatalytic Hydrogen Evolution Reaction

Abstract

Copper nanowire networks (NWs) coated by a graphene layer through a carbon-enclosed chemical vapor deposition technique at a low temperature of 400 °C with a low sheet resistance of 23.2 Ω/sq and a high transmittance of 83.4 %, which is comparable to typical values of tin-doped indium oxide (ITO), as a transparent conducting electrode were demonstrated. The graphene-coated copper NWs networks with the low sheet resistance of less than 25 Ω/sq remain at an annealing temperature of 240 oC in a pure oxygen ambient for 1 hr while the sheet resistance less than 100 Ω/sq can be still maintained in natural sea water, acidic and basic solutions, respectively. The highly stable feature in harsh environments makes the graphene-coated copper nanowire networks suitable as a catalyst toward high-efficiency hydrogen evolution reactions (HER) in a low overpotential of 252 mV at 10 mA/Cm2 with a low Tafel slope of 67 mV/dec. The non-corrosive and anti-oxidant graphene-coated copper nanowire networks could be used as an alternative transparent conducting electrode in harsh environments, such as tandem photocatalytic water splitting.

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Publication details

The article was received on 26 Feb 2017, accepted on 10 Apr 2017 and first published on 10 Apr 2017


Article type: Communication
DOI: 10.1039/C7TA01767G
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Graphene-Coated Copper Nanowire Networks as a Highly Stable Transparent Electrode in Harsh Environments Toward Efficiently Electrocatalytic Hydrogen Evolution Reaction

    M. Arumugam, L. Lee, C. Wang, C. Chen, Y. Chen, H. Medina, J. Tseng, Z. Wang and Y. Chueh, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA01767G

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