Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (01): 38-45.doi: 10.3866/PKU.WHXB19950108

• ARTICLE • Previous Articles     Next Articles

A Study on the Nonlinear Kinetics of CO Desorption under the Gas Ambience on Pd

Xin Mei, Zhai Run-Sheng, Zhang Lin-Hu, Guo Xie-Xian   

  1. State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Academia Sinica,Dalian 116023
  • Received:1993-12-20 Revised:1994-03-08 Published:1995-01-15
  • Contact: Xin Mei

Abstract:

The kinetics of CO desorption on Pd(111) has been studied by using isotope switch method under the gas-phase pressures of single isotope and mixed ones. The experiments show that the desorption kinetics is non-linear and is first order plus second order on the saturated surface. Based on the delocalized chemisorptions model and gas-surface exchange mechanism, the analytic expressions for the desorption kinetics are derived and a dynamic reasoning of the non-linear kinetics has been described in detail.

Key words: Adsorption, Desorption, Exchange, Kinetics