Hyrdogen bronzes from VMoO5.5 : An X-ray diffraction investigation |
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Authors: | C. Ancion G. Poncelet J.J. Fripiat |
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Affiliation: | 1. Groupe de Physico-Chimie Minérale et de Catalyse, Université Catholique de Louvain, Place Croix du Sud 1, B-1348 Louvain-la-Neuve, Belgium;2. CNRS-CRSOCI, rue de la Férollerie 1, F-45045 Orléans Cédex, France |
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Abstract: | Hydrogen bronzes obtained by spillover of hydrogen onto Pt particles deposited on the surface of VMoO5.5 have been examined by X-ray diffraction. The results show that H3.4VMoO5.5 is crystalline and that no intermediate crystalline phase is formed during the insertion of hydrogen in the host lattice. Oxidation of the bronze restores the initial oxide phase. Upon back-titration with H2 at 60°C, the bronze phase reappears (indicating the reversible character of these bronzes) at a much higher rate than when the bronze is formed for the first time. |
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