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- W1987673911 abstract "The adsorption and reactions of C2H4 and C2H2 on Ni{100} and Pd{100} at room temperature have been investigated by single-crystal adsorption calorimetry (SCAC). On Ni{100}, the initial heats of adsorption are 203 and 264 kJ mol−1, respectively. From the correlation of the heat changes with the stable species formed (CH and/or CCH), a mean value of ≈204 kJ mol−1 is extracted for the NiC bond energy. On Pd{100} acetylene adsorbs molecularly in a rehybridized state with initial heat of 112 kJ mol−1, corresponding to a PdC bond energy of ≈177 kJ mol−1. The kinetics of adsorption are similar for C2H2 on Ni{100} and Pd{100} and C2H4 on Ni{100}, exhibiting precursor-mediated adsorption with high initial sticking probability, while C2H4 adsorbs reversibly on Pd{100} at room temperature. Nickel and palladium surfaces are known to favour the cleavage of CC bonds, whereas platinum surfaces do not. This is not related to differences in metalcarbon bond energies, and must instead be attributed to a kinetic origin." @default.
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- W1987673911 date "1977-01-01" @default.
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- W1987673911 title "Chemisorption of unsaturated hydrocarbons on Ni(100) studied by low energy electron diffraction and Auger spectroscopy" @default.
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- W1987673911 doi "https://doi.org/10.1016/0039-6028(77)90449-6" @default.
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