EFFECT OF ION-IMPLANTATION ON THE OXYGEN OVERPOTENTIAL OF NI ANODES

This work investigates the use of ion implantation for decreasing the oxygen-overpotential of nickel anodes. It is part of a search for improved electrocatalysts to increase the energy efficiency of the H//2O electrolysis process for producing H//2 gas. A series of Ni electrodes were implanted at room temperature with various doses of 50 keV Ag** plus , Li** plus , He** plus , or Kr** plus ions. Polarization measurements were then made in a suitable electrolysis cell over a wide range of current densities, using aqueous KOH solution (30%) at 80 degree C as electrolyte. The results are presented and discussed.