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Open Access Complex Hydrides – When Powder Diffraction needs Help

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'Real life' energy-related materials such as solid-state hydrogen storage compounds or components of electrochemical cells are usually polycrystalline, poorly crystallized, highly reactive and dynamic systems. Powder diffraction at modern high brilliance X-ray sources is the most useful tool to investigate such systems because it is easy, fast and extremely versatile with respect to measurement conditions as well as in situ setups. However, it is in the nature of these systems that they undergo processes that cannot be investigated by diffraction alone. The central role in hydrogen storage materials is played by hydrogen itself, the worst X-ray scatterer in the periodic system. Gas release, the purpose of a hydrogen storage material, is not detected by diffraction. Amorphous components are badly characterized. We want to show how a complementary approach combining different methods allows to overcome limitations imposed on powder diffraction by the sample nature of 'real' hydrogen storage materials.

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Keywords: COMPLEX HYDRIDE ˙ HYDROGEN STORAGE ˙ IN SITU STUDIES; POWDER DIFFRACTION &DOT

Document Type: Research Article

Affiliations: 1: University of Geneva, Laboratory of Crystallography, DPMC 24, Quai Ernest-Ansermet, CH-1211, Geneva 4, Switzerland 2: University of Geneva, Laboratory of Crystallography, DPMC 24, Quai Ernest-Ansermet, CH-1211, Geneva 4, Switzerland. [email protected]

Publication date: February 1, 2014

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  • International Journal for Chemistry and Official Membership Journal of the Swiss Chemical Society (SCS) and its Divisions

    CHIMIA, a scientific journal for chemistry in the broadest sense, is published 10 times a year and covers the interests of a wide and diverse readership. Contributions from all fields of chemistry and related areas are considered for publication in the form of Review Articles and Notes. A characteristic feature of CHIMIA are the thematic issues, each devoted to an area of great current significance.

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