Effect of Pr2O3 on the microstructure and hydrogen evolution property of nickel sulphur coatings electrodeposited on the nickel foam substrate

This paper studies the effect of the Pr₂O₃ addition on the hydrogen evolution property and microstructures of the Ni-S coating electrodes. The coating electrodes with and without Pr₂O₃ have been prepared through electrodeposition using a modified Watts bath. Results indicated that Ni-S coating with Pr₂O₃ shows a much better electrocatalytic activity than that without Pr₂O₃. XRD and SEM results indicated that the high electrocatalytic activity for the Ni-S coating with Pr₂O₃ addition is due to the larger surface area and amorphous microstructure.