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Nanocrystalline Ni–Cu Electroplated Alloys Cathodes for Hydrogen Generation in Phosphate-Buffered Neutral Electrolytes
Mosaad Negem,
H. Nady,
Charlie Dunnill 
Journal of Bio- and Tribo-Corrosion, Volume: 6, Issue: 4
Swansea University Author:
Charlie Dunnill
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DOI (Published version): 10.1007/s40735-020-00413-3
Abstract
The use of hydrogen as a green fuel alongside an environmentally friendly electrolyte is the most promising technology required for the conversion and storage of renewable energies and the transition to a low carbon future. Nanocrystalline Ni–Cu alloys have been electroplated onto copper electrodes...
| Published in: | Journal of Bio- and Tribo-Corrosion |
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| ISSN: | 2198-4220 2198-4239 |
| Published: |
Springer Science and Business Media LLC
2020
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa55082 |
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| Abstract: |
The use of hydrogen as a green fuel alongside an environmentally friendly electrolyte is the most promising technology required for the conversion and storage of renewable energies and the transition to a low carbon future. Nanocrystalline Ni–Cu alloys have been electroplated onto copper electrodes and characterized via scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction. The electrocatalytic performance of the electroplated Ni–Cu alloys cathodes for the hydrogen evolution reaction (HER) was investigated using cyclic voltammetry, electrochemical impedance spectroscopy and cathodic polarization measurements in the PBNE. The results demonstrate that the nanocrystalline Ni–Cu alloys cathodes have high electrocatalytic efficiency for HER. The overpotential of HER required to reach a catalytic current density of 10.0 mA/cm2 was 284 mV vs. RHE. The most active cathode was a 30:70 (Atom ratio) Ni:Cu alloy in the PBNE and had 1.5 times higher than standard Pt/C which can be applied as a cathode for H2 production in the industrial water electrolyzer, potentially increasing the efficiency of devices and thus lowering the cost of green hydrogen production. |
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| Keywords: |
Ni–Cu alloys; Electrocatalyst; HER; EIS; Nanocrystalline cathode; Ultrasound; Polarization |
| College: |
Faculty of Science and Engineering |
| Issue: |
4 |