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(Color online) (a) Reflection spectra measured on Pd films with , 0.80, and 0.70 in the as-prepared (metallic) and hydrogenated states ( at room temperature). (b) Transmission spectra measured on the same films in the hydrogenated state. In the metallic state the transmission is below the detection limit of the spectrometer.
(Color online) (a) Absorption spectra calculated for a Pd film; the thickness of the Mg–Ti–H layer is varied between 30 and . (b) Absorption spectra measured for a Pd film in the as-prepared and hydrogenated states ( at room temperature). (c) Spectrum of the solar radiation at atmospheric mass (AM) of 1.5 shown together with the blackbody radiation at . Both are in arbitrary units.
(Color online) (a) Reflection at measured on Pd films with and ; the first two cycles are shown. Hydrogen is introduced in the system at , 730, and ; the start of the dehydrogenation period is indicated by the two arrows; loading is done with 5% in Ar flow and unloading with 20% in Ar flow. (b) Same measurements as in (a) but for more cycles.
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