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- W2105184920 abstract "The kinetics of CCl bond cleavage on the Pd(111) surface have been measured using four chlorofluorocarbons (CFCs) containing different numbers of chlorine atoms on the primary carbon: CF3CCl3, CF3CFCl2, CF3CF2Cl, and CF3CHFCl. The desorption energies, ΔEdes, of the CFCs were found to increase with increasing number of chlorine atoms in the following order: CF3CF2Cl < CF3CHFCl < CF3CFCl2 < CF3CCl3. The rate constants and apparent barriers to CCl cleavage, ΔEapp, on the Pd(111) surface were measured using CF3CFCl2, CF3CF2Cl, and CF3CHFCl. The trend in ΔEapp was found to be opposite that for ΔEdes: CF3CFCl2 < CF3CHFCl < CF3CF2Cl. For CF3CFCl2 and CF3CHFCl the intrinsic activation energy for CCl cleavage on the Pd(111) surface, ΔECCl, was determined by adding the desorption energies and the apparent activation energies for dissociative adsorption, ΔECCl=ΔEapp +ΔEapp. In contrast with the other compounds, CF3CCl3 adsorbed on the Pd(111) surface dechlorinates rather than desorbing during heating, thus allowing direct measurement of ΔECCl. Comparison of ΔECCl and ΔEdes among the CFCs suggests that the variations in ΔEdes have a greater influence on the dechlorination reactivity than the variations in ΔECCl." @default.
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- W2105184920 date "2004-04-01" @default.
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- W2105184920 title "Chlorofluorocarbon dechlorination on Pd(111): effect of chlorine stoichiometry" @default.
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- W2105184920 doi "https://doi.org/10.1016/j.jcat.2004.01.013" @default.
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