Effect of Surface Defects on the Adsorption Rate of O2 on Polycrystalline Rhodium
Reaction Kinetics and Catalysis Letters
, E-ISSN: 1588-2837
Institute of Catalysis, Novosibirsk 630090, USSR
By using a method of secondary ion mass-spectrometry, the initial sticking coefficient of oxygen (So) has been measured when O2 is adsorbed on two types of the polycrystalline rhodium surface. These surfaces are: 1. defective,
i. e. subjected to ion bombardment and 2. smooth, i.e. annealed after bombardment. Values obtained for the defective and smooth surfaces are So 0.35 at sample temperatures T=295–1000 K and So 4×10−3 at T=680–870 K, respectively.