Citation: WANG Sen-Lin, ZHANG Yi. Preparation and Electrocatalytic Performance of Ni-Mo/LaNi5 Porous Composite Electrode toward Hydrogen Evolution Reaction[J]. Acta Physico-Chimica Sinica, ;2011, 27(06): 1417-1423. doi: 10.3866/PKU.WHXB20110510
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A Ni-Mo/LaNi5 porous composite electrode was successfully prepared by composite electrodeposition and dissolution with a concentrated alkali solution. We found that the electrode consisted of two phases and a porous structure using scanning electron microscopy (SEM) and X-ray diffraction (XRD). In a 20% (w) NaOH solution the electrocatalytic properties toward hydrogen evolution reaction (HER) of the electrode was evaluated using electrochemical steady-state polarization curve and electrochemical impendence spectroscopy (EIS). As a result, the porous composite electrode had od electrocatalytic activity toward HER. We also found that the control step in the HER was the electrochemical de-absorption of hydrogen. The stability of the porous composite electrode was investigated by cycle voltammetry, discontinuity constant potential electrolysis over a long time, and differential scanning calorimetry (DSC). The results show that the stability of the porous composite electrode is od.
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