3 years ago

Highly active electrocatalysis of hydrogen evolution reaction in alkaline medium by Ni-P alloy: a capacitance-activity relationship

Highly active electrocatalysis of hydrogen evolution reaction in alkaline medium by Ni-P alloy: a capacitance-activity relationship
Different weights of amorphous Ni-P alloy with same P contents were electrodeposited on nickel plate with same area used as cathode for hydrogen evolution reaction (HER). The amorphous Ni-P alloy coatings were characterized for their surface morphology and composition through Scanning electron microscopy (SEM) and Energy dispersive X-ray spectroscopy (EDS) techniques, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analysis. The electrocatalytic activity for HER in alkaline medium is determined by linear scan voltammetry (LSV) and a relationship between HER activity and capacitance is established. The capacitance varies with the loading of the Ni-P on Ni plate but the activity for HER is directly proportional to the capacitance in alkaline and vice versa. 3#Ni-P/Ni containing 3.85 mg Ni-P alloy with highest capacitance performs the best catalytic activity. This work provides direct evidence to explore the capacitance influence on the electrocatalytic activity for the HER.

Publisher URL: www.sciencedirect.com/science

DOI: S2095495617303674

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