经热扩散处理的注镍钛电极的析氢反应研究

Studies on Hydrogen Evolution at Thermodiffusion-Treated Nickel-Implanted Titanium Electrodes

将高能离子注入电极表面可引入催化活性元素,进而能形成大量的活性中心,提高催化活性,作者将镍离子注入钛电极,结果使析氢过电位降低245 mV,比未注镍的钛电极的活性高得多。实验表明,电极的催化活性随表面镍浓度的增加而提高。

Ni-implanted Ti electrodes were treated by thermodiffusion in higher vacuum for 1 h at the temperature from 100 to 700℃ , and the hydrogen evolution reaction was then studied at the electrodes in the solution of 0. 856 mol/L NaCl plus 0. 01 mol/L HCl. Two orders of magnitude increases in exchanging current density (to) were recorded for the .thermodif fusion-treated electrodes by comparison with the untreated. The effect is attributed to the increase of nickel concentration on the electrode surface.