Graphene-coated copper nanowire networks as a highly stable transparent electrode in harsh environments toward efficient electrocatalytic hydrogen evolution reactions
| Autor: | Ling Lee, Yu Ze Chen, Zhiming Wang, Jiun Yi Tseng, Yu-Lun Chueh, Chia Wei Chen, Henry Medina, Arumugam Manikandan, Yi Chung Wang |
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| Rok vydání: | 2017 |
| Předmět: |
Tafel equation
Materials science Renewable Energy Sustainability and the Environment Graphene Nanowire Oxide chemistry.chemical_element Nanotechnology 02 engineering and technology General Chemistry Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Copper 0104 chemical sciences law.invention chemistry.chemical_compound Chemical engineering chemistry law General Materials Science 0210 nano-technology Sheet resistance Photocatalytic water splitting |
| Zdroj: | Journal of Materials Chemistry A. 5:13320-13328 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c7ta01767g |
| Popis: | Copper nanowire networks (NWs) coated with 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−1 and a high transmittance of 83.4%, which is comparable to the typical values of tin-doped indium oxide (ITO), as a transparent conducting electrode were demonstrated. The graphene-coated copper NW networks retain a low sheet resistance of less than 25 Ω sq−1 even after annealing at a temperature of 240 °C in a pure oxygen environment for 1 h, while a sheet resistance less than 100 Ω sq−1 can still be maintained in natural sea water, and acidic and basic solutions. Their highly stable features in harsh environments make these graphene-coated copper nanowire networks suitable as a catalyst toward high-efficiency hydrogen evolution reactions (HERs) with a low overpotential of 252 mV at 10 mA Cm−2 and a low Tafel slope of 67 mV dec−1. 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 in tandem photocatalytic water splitting. |
| Databáze: | OpenAIRE |
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