Determination of deuterium adsorption site on palladium(100) using low energy ion recoil spectroscopy

Title: Determination of deuterium adsorption site on palladium(100) using low energy ion recoil spectroscopy
Creator: Kambali, I.; O'Connor, D. J.; Gladys, M. J.; Karolewski, M. A.
Relation: Applied Surface Science Vol. 254, Issue 14, p. 4245-4250
Publisher Link: http://dx.doi.org/10.1016/j.apsusc.2008.01.037
Publisher: Elsevier
Resource Type: journal article
Date: 2008
Description: Ion beam analysis has been recently applied to study the adsorption phenomena of some adsorbates on metal surfaces. In this paper, surface recoils created by low energy Ne⁺ ions are employed to study the adsorption site of deuterium (D) atoms on Pd(100). This technique is extremely surface sensitive with the capacity for atomic layer depth resolution. From azimuthal angle observations of Pd(100) specimen, it was found that at room temperature, D was adsorbed in the fourfold hollow site of Pd(100) at a height of 0.25 ± 0.05 Å above the surface. The adsorbate remains in the hollow site at all temperatures to 383 K though the vertical height above the surface is found to depend on coverage and for the first time evidence is found of a transition to a p(2 x 2) structure for the adsorbate. There is no evidence of D sitting in the Pd(100) subsurface at room and higher temperatures.
Subject: Hydrogen adsorption site; low energy ion scattering; palladium
Identifier: uon:5190
Identifier: http://hdl.handle.net/1959.13/43061
Identifier: ISSN:0169-4332
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