Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7720263 | International Journal of Hydrogen Energy | 2014 | 11 Pages |
Abstract
The electrocatalytic activity of nickel-copper (Ni-Cu) alloy coated electrodes for the hydrogen evolution reaction (HER) in an alkaline media was studied. The Ni-Cu alloys were electrodeposited on a Cu substrate by direct current (DC) and pulse current (PC) electrodeposition in a fixed plating bath. A wide alloy composition range (6-81Â mol% Ni) was achieved by controlling the applied current density between 5 and 300Â mA cmâ2. It was found that the electrocatalytic activity for the HER depended on the composition of the Ni-Cu alloys, where electrodes having low Ni content gave high electrocatalytic activities. DC electrodeposition resulted in better electrocatalytic performances than PC. Pulse plating parameters other than the magnitude of the applied current density did not substantially influence the electrocatalytic performance of the Ni-Cu alloy electrodes. Ni content was found to have a stronger effect on the electrocatalytic activity for the HER than the deposit morphology.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Krit Ngamlerdpokin, Nisit Tantavichet,