Assessment of the catalytic activity on Ni-based electrode for hydrogen evolution reaction in high temperature alkaline environment

In this work, the effect of temperature on the kinetics of the Hydrogen Evolution Reaction (HER) on nanocomposite Nickel-phosphorous in 1M NaOH solution was studied. In this article, four sets of experimentswere done in a non-isothermal cell. In all experiments only the compartment of the Nickel-phosphorous workingelectrode was thermostated at 298, 323, 348 and 358 K, while the reference electrode (Hg _ HgO) was held constantly at 298.0 K. Evaluation of the electrode activities was carried out by steady-state polarization Tafel curvesand cyclic voltammetry (CV). Microstructure and composition of the electrodes were studied using X-raydiffraction (XRD). Steady state polarization Tafel curves showed that the exchange current density of Ni-P electrode for the HER can be enlarged by increasing the temperature .Therefore, the CV studies were performedto obtain more precise data.

کلیدواژه ها:

Hydrogen evolution reaction ، Ni–P electrode ، electrocatalytic activity ، Composite electrode