Journal Articles (before-1995)
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Item Sorption of Hydrogen by Palladium and Palladium/Silver Alloy Wires(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1978, 74 (02), 1978) Couper, Aitken; John, Christopher S.Heats of adsorption q{8), sticking probabilities and temperature programmed desorption spectra are reported for the adsorption of H2 onto clean wire surfaces of Pd, all as functions of coverage 0. Data, principally from temperature programmed desorption, have also been obtained for the inter action of H2 with two Pd/Ag alloys. The low temperature (104 K) sorption properties of Pd were dominated by the occurrence of absorption which limited the applicability of the technique used to determineItem Interaction of diatomic molecules with clean metal wire surfaces. Part 1.—Hydrogen on tungsten(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1977, 73 (06), 1977) Couper, Aitken; John, Christopher S.Heats of adsorption, sticking probabilities and temperature programmed desorption spectra are reported for hydrogen on polycrystalline tungsten at 88 and 290 K. The heats were measured using a fine-wire calorimeter, as invented by J. K. Roberts, but with automatic recording. The initial heat of adsorption onto a clean surface at 290 K was 192 ± 8 kJ mol–1. Three desorption peaks were observed in the range 290–700 K. A discussion of the results is presented in terms of the crystal planes believed to be present at this polycrystalline surface. It is deduced that the heat of adsorption for hydrogen onto the (100) and (110) planes is 137 ± 5 kJ mol–1 and that on these planes there is a repulsive interaction energy between near neighbours of 5.25 ± 0.50 kJ (mol pair)–1. The importance of adatom interaction in this system is emphasised.