In this paper we briefly review on the non-equilibrium vibrational states of the adatoms in chemisorption and catalysis. As to chemisorption, the steady state vibrational populations are computed, analytically, and the effect of the adsorption flux on the displacement from the equilibrium investigated. The model is employed for describing experimental data on the adsorption stimulated desorption. The non-equilibrium vibrational state of the adlayer in catalysis, namely in atom recombination at solid surfaces, is also studied. It is shown that for exoergic reactions non Boltzmann populations can be stabilized, at steady state, leading to hyperthermal distributions of the product molecules.

Molinari, E., & TOMELLINI, M. (2005). Vibrational populations of the adlayer in exoergic processes at solid surfaces. In Rarefied Gas Dynamics (pp.1067-1072). MELVILLE : AMER INST PHYSICS [10.1063/1.1941676].

Vibrational populations of the adlayer in exoergic processes at solid surfaces

TOMELLINI, MASSIMO
2005

Abstract

In this paper we briefly review on the non-equilibrium vibrational states of the adatoms in chemisorption and catalysis. As to chemisorption, the steady state vibrational populations are computed, analytically, and the effect of the adsorption flux on the displacement from the equilibrium investigated. The model is employed for describing experimental data on the adsorption stimulated desorption. The non-equilibrium vibrational state of the adlayer in catalysis, namely in atom recombination at solid surfaces, is also studied. It is shown that for exoergic reactions non Boltzmann populations can be stabilized, at steady state, leading to hyperthermal distributions of the product molecules.
24th International Symposium on Rarefied Gas Dynamics, RGD24
Monopoli
JUL 10-16, 2004
24th
IMIP - Insituto Metodologie Inorganiche e Plasmi, CNR;University of Bari and the Department of Chemistry;EOARD;ESA-ESTEC - European Space Agency;GNFM-INDAM, Gruppo Nazionale per la Fisica Matematica
Rilevanza internazionale
contributo
Settore CHIM/02 - Chimica Fisica
eng
HYDROGEN; KINETICS; CHEMISORPTION; DESORPTION; EXCITATION; STATE
Intervento a convegno
Molinari, E., & TOMELLINI, M. (2005). Vibrational populations of the adlayer in exoergic processes at solid surfaces. In Rarefied Gas Dynamics (pp.1067-1072). MELVILLE : AMER INST PHYSICS [10.1063/1.1941676].
Molinari, E; Tomellini, M
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/35264
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