Internal Energy of Product CO2 in CO Oxidation on Pd Surfaces
نویسندگان
چکیده
منابع مشابه
Angular dependence of rotational and vibrational energies of product CO2 in CO oxidation on Pd(110).
The rotational and vibrational energies of product CO2 in the CO oxidation on Pd(110) surfaces were measured as functions of desorption angles. The antisymmetric vibrational temperature (Ta) was separately determined from the other vibrational modes from the normalized chemiluminescence intensity. The rotational temperature (Trot) and vibrational temperature averaged over the symmetric and bend...
متن کاملInternal-energy measurements of angle-resolved product CO2 in catalytic CO oxidation by means of infrared chemiluminescence.
Measurements of both vibrational and rotational energies of product CO(2) in CO oxidation on palladium surfaces have been successfully performed as a function of the desorption angle by means of infrared chemiluminescence. The remarkable angle dependences of both energies indicate facile energy partitioning in repulsive desorption and provide new dimensions in the study of surface reaction dyna...
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We use density functional theory (DFT) to study CO-adsorption-induced Pd surface segregation in Au/Pd bimetallic surfaces, dynamics of Pd−Au swapping, effect of defects on the swapping rate, CO-induced Pd clustering, and the reaction mechanism of CO oxidation. The strong COphilic nature of Pd atoms supplies a driving force for the preferential surface segregation of Pd atoms and Pd cluster form...
متن کاملPolar- and azimuth-angle-dependent rotational and vibrational excitation of desorbing product CO2 in CO oxidation on palladium surfaces.
Clear polar and azimuth angle dependencies were found in rotational and vibrational energies of product CO2 in CO oxidation on Pd surfaces. On Pd(110)-(1x1), with increases in polar angle, both energies decreased in the [001] direction but remained constant in [110]. On the Pd(110) with missing rows, both energies increased in [001] but decreased in [110], indicating that the transition state c...
متن کاملCO Oxidation on the Pd(111) Surface
Under technologically relevant oxygen-rich conditions, the reaction mechanism of CO oxidation over transition metals can be complicated by the formation of oxides. Questions of whether the active surface for CO oxidation is a pristine metal, a surface oxide, or a bulk oxide is still under active debate. In this study, density functional theory calculations are used to model CO oxidation on the ...
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ژورنال
عنوان ژورنال: Journal of the Vacuum Society of Japan
سال: 2009
ISSN: 1882-4749,1882-2398
DOI: 10.3131/jvsj2.52.67