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- W2001433729 abstract "Abstract Chlorine adsorbs readily on Rh(111) at 300 K via a mobile precursor state to form a chemisorbed overlayer; LEED shows that (√3 × √3)R30° and (4 × 4) structures are formed during the growth and completion of this overlayer, desorption from which occurs exclusively as atomic Cl. An analysis of the overlayer desorption data yields a value of ~ 160 kJ mol −1 for the activation energy to Cl desorption and a pre-exponential factor of 2 × 10 7 s −1 . The former value is shown to be in good agreement with an empirical estimate of the Rh-Cl chemisorption bond energy. Surface → bulk transport appears to be the dominant mechanism for Cl loss at temperatures below 700 K. The adsorption behaviour at 600 K is quite different, with the LEED, Auger, ESD and desorption data all suggesting that nucleation and growth of a rhodium chloride takes place beyond a critical chlorine coverage of 1 3 . The structural properties of this chloride phase are discussed, and its thermal properties are shown to be in accord with known thermodynamic data. A consistent scheme is presented which accounts for the low temperature and high temperature behaviour of the Rh-Cl system and the transition from overlayer to halide." @default.
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- W2001433729 date "1981-06-01" @default.
- W2001433729 modified "2023-10-03" @default.
- W2001433729 title "Structural and kinetic aspects of the rhodium-chlorine system: Chlorine chemisorption and surface chloride formation on Rh(111)" @default.
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- W2001433729 doi "https://doi.org/10.1016/0039-6028(81)90544-6" @default.
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