| PENG Wen-yi,ZHU Feng,DENG Xiao-hua,TAO Jun,ZHOU Ying-yu.Effect of Electrodeposition Process Parameters on Catalytic Performance of Ni-Mo-Zn Ternary Alloy Electrode for Hydrogen Evolution[J],49(1):173-179 |
| Effect of Electrodeposition Process Parameters on Catalytic Performance of Ni-Mo-Zn Ternary Alloy Electrode for Hydrogen Evolution |
| Received:April 17, 2019 Revised:January 20, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2020.01.020 |
| KeyWord:electrolysis of water hydrogen evolution reaction (HER) electro-catalysis electrodeposition amorphous |
| Author | Institution |
| PENG Wen-yi |
a.School of Materials Science and Engineering, Nanchang University, Nanchang , China |
| ZHU Feng |
a.School of Materials Science and Engineering, Nanchang University, Nanchang , China |
| DENG Xiao-hua |
b.Institute of Space Science and Technology, Nanchang University, Nanchang , China |
| TAO Jun |
a.School of Materials Science and Engineering, Nanchang University, Nanchang , China |
| ZHOU Ying-yu |
a.School of Materials Science and Engineering, Nanchang University, Nanchang , China |
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| Abstract: |
| The work aims to prepare Ni-Mo-Zn ternary alloy electrode on copper base by direct current electrodeposition, so as to improve the efficiency of cathode electrode in hydrogen evolution reaction of electrolytic water. The effects of different electrodeposition process parameters on the hydrogen evolution performance of nickel-molybdenum-zinc ternary alloy coatings were investigated. Scanning electron microscope energy, dispersive spectrometer and X-ray diffractometer were used to characterize the morphology, phase structure and element composition of the coatings. The hydrogen evolution overpotential was measured by linear sweep voltammetry (LSV), the Tafel slope was obtained by Tafel polarization, and the hydrogen evolution catalytic performance of the alloy coating was characterized by electrochemical impedance spectroscopy (EIS). The optimum process parameters were temperature of 45 ℃, pH=10.5 and current density of 100 mA/cm2. The relative hydrogen standard potential of the alloy was only 139 mV at 10 mA/cm2. Meanwhile the Tafel slope was 103 mV/dec and the activation electrode resistance (Rct) decreased as the voltage increased. The atomic ratios of nickel, molybdenum and zinc were 68.40%, 9.54% and 22.06%, respectively. The microstructure was amorphous and the surface was rough due to stacking of nano-scale particles. Different process parameters have a significant impact on the hydrogen evolution performance of Ni-Mo-Zn electrode, which show that the hydrogen evolution reaction of Ni-Mo-Zn increased first and then decreased with the increase the pH value and the current density, but increased with the increase of temperature monotonously, respectively. Ni-Mo-Zn has a high hydrogen evolution reaction performance due to its amorphous structure, elemental synergy and rough surface. |
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