欢迎访问过程工程学报, 今天是

›› 2004, Vol. 4 ›› Issue (1): 8-11.

• 反应与分离 • 上一篇    下一篇

电沉积制备Ni-P非晶态催化电极上的析氢反应

陈艳丽,李陵川,张懿,曹宏斌   

  1. 中国科学院过程工程研究所
  • 出版日期:2004-02-20 发布日期:2004-02-20

Hydrogen Evolution Reaction on Amorphous Ni-P Electrodes Produced by Electrodeposition

CHEN Yan-li,LI Ling-chuan,ZHANG Yi,CAO Hong-bin   

  1. Institute of Process Engineering, Chinese Academy of Sciences
  • Online:2004-02-20 Published:2004-02-20

PDF

摘要： 用直接电沉积法在室温下制备出不同磷含量的Ni-P合金电极，用恒电流极化法研究了电极在20℃的1 mol/L KOH溶液中作为析氢反应阴极的催化性能，并用XRD及SEM方法研究了Ni-P合金镀层的组织结构. 实验结果表明，磷含量为8.49 at%的Ni-P合金电极具有优良的催化性能，在150 mA/cm2的电流密度下，析氢反应过电位最低，约为95 mV, 比纯镍电极低342 mV, 低电流密度区的Tafel斜率为65.4 mV/dec, 表现出良好的析氢催化活性, 这种高催化活性与镀层磷含量及组织结构有关.

关键词: 电沉积, Ni-P合金, 非晶态, 析氢反应

Abstract: Ni-P alloy electrodes with different phosphorus contents were prepared by means of electrodeposition method. The catalyzing property of the different electrodes as the hydrogen evolution-cathode in 1 mol/L KOH solution at 20℃ was studied with constant current polarization method. The structures of Ni-P alloy electrodes were also analyzed by XRD and SEM. The results show that the Ni-P alloy electrode with phosphorus content of 8.49 at% (atomic percent) performs excellent catalyzing property. Its hydrogen evolution overpotential is 95 mV, the lowest at the current density of 150 mA/cm2, which is 342 mV lower than that of Ni electrode. And its Tafel slope in the low current density is 65.4 mV/dec. This property is related to its phosphorus content and structure.

Key words: electrodeposition, Ni-P alloy, amorphous, hydrogen evolution reaction