Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7709251 | International Journal of Hydrogen Energy | 2017 | 9 Pages |
Abstract
Tri-component Ni-Co-Cu and Ni-Mo-Cu alloys are electrodeposited depending on current density, temperature and copper ion electrolyte concentration. In both systems hydrogen evolution reaction (HER) is studied by polarization dependences and electrochemical impedance spectroscopy (EIS) in 6Ð ÐÐÐ. It is shown that the incorporated copper quantity is significant for alloy catalytic activity. The lowest overvoltage and charge transfer resistor values for HER, and respectively, the best catalytic activity, is exhibited by Ni43Co37Cu20 and Ni57Mo27Cu16 alloys. The high electrode activity of Mo-alloys is associated with a well-developed surface area whereas in Co-alloys it is attributed also to Ni-Co synergism.
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Electrochemistry
Authors
D. Goranova, E. Lefterova, R. Rashkov,