In situ activation of Ni alloy with Mo for hydrogen evolution reaction

In this study Ni alloy have been activate during hydrogen evolution reaction by adding Mo ions into the alkaline electrolyte. After dissolving different amount of ammonium molybdate in theNaOH electrolyte, Ni alloy was used as cathode for hydrogen evolution reaction. Afterwards acomparison between hydrogen overpotential measured in Ni alloy with and without in situ activation has been made; the in situ activation shows an improvement of electro catalyticproperties of Ni alloy for hydrogen evolution reaction. In order to increase the impact of in situ activation of Mo ions used of Ni structure, that extremely significant impact in improving the Nicatalyst activation during in situ activation The values of overpotential and Tafel slop for Nialloy,with and without of Mo improved . In situ activation Ni showed a good stability for HER. In this study are used from chronopetentiometery (CP), chronoamperometric (CA), electrochemically impedance spectroscopy (EIS) and linear polarization (LP) techniques.

Keywords:

Hydrogen evolution reaction , in situ activation , Tafel , Electrochemical impedance spectroscopy