Browsing by Author "Clewley, J. D."

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    Thermodynamic Properties of Hydrogen and Deuterium Dissolved in Palladium at Low Concentrations over a Wide Temperature Range
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1973, 69 (2), 1973) Clewley, J. D.; Curran, T.; Flanagan, Ted B.; Oates, W. A.
    The equilibrium pressures of the Pd/H2 and Pd/D2 systems have been measured in the tempera ture range from — 100°C to 35O°C for values of H(D)-to-Pd, atomic ratio, in the approximate range from 0.0005 to 0.005. These data were obtained in an ultra-high vacuum apparatus with large samples of low surface area. Partial thermodynamic data have been obtained from these equilibrium data; a significant temperature dependence is reported for the relative partial molar enthalpies and entropies.
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    Thermodynamics of hydrogen dissolved in palladium/rhodium and palladium/platinum alloys
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1977, 73 (03), 1977) Clewley, J. D.; Lynch, J. F.; Flanagan, T. B.
    Partial thermodynamic parameters have been determined for the solution of hydrogen in Pd/Pt and Pd/Rh alloys. The partial excess entropies of absorption of hydrogen at infinite dilution decrease regularly with atom fraction platinum but not with atom fraction rhodium. This suggests that interstices are not excluded for hydrogen occupation by rhodium atoms neighbouring the interstices but are excluded by the platinum nearest neighbours. Other thermodynamic parameters for hydrogen absorption have been determined and are compared for these alloys. These results are discussed in terms of the observation that rhodium will absorb hydrogen at high pressures of hydrogen when situated within the palladium lattice whereas platinum will not.