Development of single crystal gas pressure cells for in situ hydrogenation reactions
The proposal focusses on testing gas pressure cells for solid gas reactions followed by in situ neutron scattering. These reactions are getting high attention due to far-reaching applications. For example, the synthesis of functional materials, which can be used for hydrogen storage or proton conductivity, as used for renewables and fuels cells. Two recently developed gas pressure cells, based on previous cells are presented and should be tested. They are developed for the D20 diffractometer using deuterium pressure. A newly designed environment for the currently used sapphire single crystal sample holder should reduce mechanical tension leading to higher pressure stability. The second developed cell separates the inner sample holder from the outer pressure holding element. This allows a lower background contribution of the sample holder to the diffraction pattern. The pressure holding tube does not contribute to the diffraction pattern as all reflections are filtered out by the radial collimator at D20. The increased gas volume and thus high background contribution should be reduced by using Gd2O3 vanished shades inside the reaction chamber.
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FINGER Raphael; Thomas C. Hansen and Holger Kohlmann. (2019). Development of single crystal gas pressure cells for in situ hydrogenation reactions. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-24-621
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