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- W2022122086 abstract "The decomposition of D2CO, CH3OD and HCOOH on Pt(110) and of D2CO on Pt(S)-[9(111) × (100)] was studied by molecular beam relaxation spectroscopy. D2CO and CH3OD evolved CO and H2 via a desorption limited sequence of elementary steps. The rate constant for CO desorption from Pt(110) was 6 × 1014exp(− 35.5 kcalgmol · RT) s−1, and from Pt(S)-[9(111) × (100)] it was 1 × 1015 exp(−36.2 kcalgmol·RT) s−1. On Pt(110) the rate constant for hydrogen formation was 100 ± 1exp(−24 kcalgmol·RT) m̧2atom · s. On Pt(S)-[9(111) × (100)] two pathways for H2 formation existed with rate constants of 8.7 × 10−2exp( −24.9 kcalgmol· RT) cm2atom· s and 3.2 × 10−3 exp(−19.5 kcalgmol·RT) cm2atom· s. These pre-exponential factors are in order of magnitude agreement with values typical of hydrogen recombination on other metals. When a small amount of sulfur ( ~ 0.1 ML) was adsorbed on the stepped Pt surface, only one pathway for H2 formation existed due to blockage of stepped sites. A similar result was obtained when a beam of CO was impinged on the surface. Formic acid decomposed via a branched process to form primarily CO2 and H2." @default.
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- W2022122086 date "1983-05-01" @default.
- W2022122086 modified "2023-09-23" @default.
- W2022122086 title "Reactive scattering of small molecules from platinum crystal surfaces: D2CO, CH3OH, HCOOH, and the nonanomalous kinetics of hydrogen atom recombination" @default.
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- W2022122086 doi "https://doi.org/10.1016/0039-6028(83)90046-8" @default.
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