Low Temperature Physics: 30, 1 (2004); https://doi.org/10.1063/1.1645151 (26 pages)
Fizika Nizkikh Temperatur: Volume 30, Number 1 (January 2004), p. 3-37    ( to contents , go back )

Low-temperature gas adsorption on metal surfaces

Yu.G. Ptushinski

Institute of Physics of the National Academy of Sciences 46 Nauki Ave., Kiev 03028, Ukraine
E-mail: ptush@iop.kiev.ua

Received April 29, 2003

Abstract

A review of the published data on adsorption of some simple gases at low temperatures (≤ 30 К) on metal surfaces is presented. The methods of investigating low-temperature gas adsorption are briefly described. Particular attention is given to hydrogen adsorption on transition and noble metals. The experimental results for transition metals include information about the state of adsorbed particles (atoms-molecules), the adsorption state spectra, the kinetics of adsorption-desorption processes, the precursor mediated mechanism of adsorption, the role of H2 and D2 quantum properties and 2D phase transitions, the adsorbed layer structure, and electron-stimulated processes. The experimental data on hydrogen adsorption in noble metals along with the theoretical calculations provide information on the fine peculiarities of the quantum sticking mechanism, in particular, on the capture of molecules in quasi-bounded states and the effect of diffraction by the surface atomic lattice. The data on the role of molecule rotational states, and ortho-para conversion and direct photodesorption of molecules are considered. A review of a few papers on adsorption of oxygen, carbon monoxide and nitrogen is also given.

PACS:
68.45.Da -

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