Absolute coverages of CO and O on Pt(111); comparison of saturation CO coverages on Pt(100), (110) and (111) surfaces

Abstract

Nuclear microanalysis (NMA) has been used to determine the absolute coverages of oxygen and CO absorbed on Pt(111). The saturation oxygen coverage at 300 K is 3.9±0.4 × 10 14 O atoms cm -2 ( θ = 0.26±0.03), confirming the assignment of the LEED pattern as p(2×2). The saturation CO coverage at 300 K is 7.4±0.3 × 10 14 CO cm -2 ( θ = 0.49±0.02). The low temperature saturation CO coverages on Pt(100), (110) and (111) surfaces are compared.