高等学校化学学报 ›› 1986, Vol. 7 ›› Issue (3): 255.

• 研究论文 • 上一篇    下一篇

面心立方金属电极氢析出反应统计力学处理

苏文煅, 吴元云, 吴继道   

  1. 厦门大学化学系
  • 收稿日期:1984-10-23 出版日期:1986-03-24 发布日期:1986-03-24
  • 基金资助:

    中国科学院科学基金

A Statistical Mechanical Treatment of Hydrogen Evolution Reaction on FCC Metal

Su Wenduan, Wu Yuanyun, Wu Jidao   

  1. Department of Chemistry, Xiamen University, Xiamen
  • Received:1984-10-23 Online:1986-03-24 Published:1986-03-24

摘要: 应用统计力学方法建立的电极过程速度方程,在假定氢析出反应遵循催化机理的前提下,提出吸附氢原子间排斥能估算方案,计算了Ni、Pt、Pd、Cu、Ag、Au等六种面心立方金属电极上氢析出反应η~lgi曲线,结果表明,其Tafel斜率b决定于电极表面吸附氢原子间的相互排斥作用,而截距a刚和金属原子半径、晶面点阵排列以及氢的吸附热等因素有关。

Abstract: The kinetics of electrolytic hydrogen evolution reactions ( H.E.R. ) on FCCmetals is considered in terms of statistical mechanics, assuming that the processes obey the catalytic mechanism. Amethod is proposed to calculate the inter-repulsed potentials between the hydrogen atoms adsorbed on crystal surfaces,and the theoretical η-lg(i) curves for H.E.R. on Ni, Pi, Ag, Cu, Au, and Pd arc plotted, respectively.The results show that the theoretical Tafel slope ( ?η/ ?lg(i) = b ) is determined by inter-repulsion between the adsorbed hydrogen atoms, and the intercept a is dependent on the atomic radius and lattice array of metal, and heat of adsorption of hydrogen, etc.

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