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| Preparation and Hydrogen Evolution Properties of Nanoporous Ni, Ni-Mo Alloys and Their Oxides |
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| Abstract: Nano porous Ni, Ni-Mo and their oxides electrode materials were prepared by rapid solidification and de-alloying. The phase, morphology and pore size distribution of porous electrode materials were characterized by XRD, SEM, TEM and N2 absorption-desorption test, and the electro-catalytic hydrogen evolution of porous electrode was tested by linear scanning voltammetry, Tafel slope and chronopotentiometry. The results show that the hydrogen evolution activity of Ni-Mo alloy was the strongest and the process of hydrogen evolution is controlled by Volmer-Heyrovsky step. Its apparent exchange current density (j0) was 0.25 mA·cm-2. After electrolyzing 10 000 seconds at constant current density (100 mA·cm-2), hydrogen evolution over-potential increased only by 39 mV, showing excellent hydrogen evolution stability. The improvement of specific surface area and intrinsic catalytic activity of Ni-Mo alloy electrode resulted in lower hydrogen evolution over-potential. |
| Keywords: rapid quenching de-alloying Ni-Mo alloy electro-catalytic hydrogen evolution |
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| ZHOU Qi,LI Zhi-Yang.Preparation and Hydrogen Evolution Properties of Nanoporous Ni, Ni-Mo Alloys and Their Oxides[J].Chinese Journal of Inorganic Chemistry,2018,34(12):2188-2196. |
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