Effect of surface defects on the adsorption rate of O2 on polycrystalline rhodium

By using a method of secondary ion mass-spectrometry, the initial sticking coefficient of oxygen (S_o) 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 S_o 0.35 at sample temperatures T=295–1000 K and S_o 4×10^–3 at T=680–870 K, respectively.

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- (S_o) - : — , -. S_o0,35 295–1000 K, 4×10^–3 T=680–870 K.