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Ni 50 Mo 40 Ti 10 alloy prepared by mechanical alloying as electroactive material for hydrogen evolution reaction
Author(s) -
Panek Joanna,
Kubisztal Julian,
BierskaPiech Bożena
Publication year - 2014
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.5501
Subject(s) - alloy , materials science , hydrogen , metallurgy , chemistry , organic chemistry
The subject of this work is Ni 50 Mo 40 Ti 10 alloy produced by mechanical alloying and subsequent heat treatment. The obtained material was tested as electrode for the hydrogen evolution reaction (HER) in an alkaline environment. The results were compared with those obtained for the Ni 50 Mo 50 catalyst. Electrochemical characterization was carried out by the steady‐state polarization method and the electrochemical impedance spectroscopy (EIS). On the basis of the results of the EIS measurements, the average rate constant of the HER was determined. The calculated values of surface roughness factor, R f , allowed to evaluate the true catalytic effect of the investigated electrode material. It was stated that Ni 50 Mo 40 Ti 10 alloy annealed at 1173 K exhibits the higher electrocatalytic activity for the HER compared with the Ni 50 Mo 50 . The increase in the intrinsic activity could be attributed to the presence of NiMo intermetallic phase and Ni(Ti) solid solution. Copyright © 2014 John Wiley & Sons, Ltd.