摘要: A microscopic model of the growth thin anodic oxide film on Pt is presented. The slow step migration a atom from metal lattice to become Pt(II) species. species can then rapidly diffuse across surface. Sites different types, e.g. terrace atoms or atoms, have reactivity, dependent their number and type bonds. Monte Carlo simulations are used predict kinetics surface reconstruction. treatment structures oversimplified by assumption that they both simple cubic unit cells with identical parameters. predicts correctly observed direct logarithmic law for potential transients, without any change in behavior at full monolayer coverage. For cyclic voltammetry, it an peak first cycle, plateau subsequent cycles. reversible component found, interpreted terms reconstruction aided rapid diffusion. height distributions predicted this agree recent structural measurements, but exact topography after multiple cycles not reproduced.
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