Ni ion-implanted Ti cathode was used to study the cathodic reduction of H+ in 5% NaCl-0.01 mol.dm-3 HCl solution The electrocatalytic property, the distribution of the elements, chem. valencies and the surface morphol. of the electrode were determine by electrochem. method and AES, XPS, TEM, etc., techniques. It was found that this electrode showed much higher catalytic activity than the pure Ti for the reduction of H+.

Key words: ELECTRODE, CATHODE, TITANIUM, HYDROGEN ION, NICKEL ION, ION IMPLANTATION, REDUCTION REACTION, ATOMIC EMISSION SPECTROMETRY, CATALYTIC ACTIVITY, ELECTROCHEMICAL METHOD