Preparation of Ni-P-La alloy as a novel electrocatalysts for hydrogen evolution reaction

Ternary Ni-P-La alloy was synthesized by the co-electrodeposition method on the copper substrate. The energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), and X-ray diffraction (XRD) were used for characterization of the synthesized alloy. The electrochemical performance of the novel alloy was investigated based on electrochemical data obtained from steady-state polarization, Tafel curves, linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS) in alkaline solution and at ambient temperature. The results showed that the microstructural properties play a vital purpose in determining the electrocatalytic activity of the novel alloys. Also, the HER on investigated alloys was performed via the Volmer-Heyrovsky mechanism and Volmer step as RDS in this work. Ni-P-La catalyst was specified by eta(250) = -139.0 mV, b = -93.0 mV dec(-1), and j(o) = -181.0 mu A cm(-2). The results revealed that the Ni-P-La catalysts have a high potential for HER electrocatalysts in 1M NaOH solution. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.