Dj. Luo et al., STUDY ON AMORPHOUS NI-MO-FE-ZN COATING ELECTROCATALYST FOR HYDROGEN EVOLUTION IN ALKALINE-SOLUTION, JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 12(3), 1996, pp. 190-194
Citations number
12
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Amorphous Ni-Mo-Fe-Zn quaternary alloy coatings are developed by means
of electrodeposit, and after most of zinc is leached out their electr
ocatalytic activity toward the hydrogen evolution reaction (HER) in al
kaline media is studied using electrochemical polarization and a.c. im
pedance techniques. The results show these coatings have very high ele
ctrocatalytic activity and excellent stability. This might benefit fro
m the increased active surface area, well-pronounced synergism as well
as their amorphous structures. The HER proceeds through the Volmer-He
yrovsky mechanism with a rate-determination-step (RDS) of Volmer at hi
gh overpotentials and the HER is controlled by Heyrovsky in lower over
potential areas.