M W Tew et al 2009 J. Phys.: Conf. Ser. 190 012172 doi:10.1088/1742-6596/190/1/012172
M W Tew1, J T Miller2 and J A van Bokhoven1
Show affiliationsIn situ X-ray absorption spectroscopy at the Pd L3 edge was applied to determine the particle size effect on the formation of palladium hydride and on surface hydrogen adsorption at room temperature. Pd L3 edge XANES spectra allow direct detection of hydride formation via a characteristic spectral feature caused by the formation of a Pd-H anti-bonding state. This feature showed strong particle size dependence. The L3 edge spectra were reproduced using full multiple scattering analysis and density of states calculations and the contributions of bulk-dissolved and surface hydrogen to the XANES spectra could be distinguished. The ratio of hydrogen on the surface versus that in the bulk increased with decreasing particle size, and smaller particles dissolved less hydrogen.
Condensed matter: electrical, magnetic and optical
Issue 1 (2009)
M W Tew et al 2009 J. Phys.: Conf. Ser. 190 012172
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