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L. M. KULIKOV, N. B. KOENIG, N. V. SHEVCHUK, L. G. AKSEL’RUD, and V. N. DAVYDOV
«Layered Nanostructures of Wolfram and Molybdenum Disulfides: Hydrogen Deintercalation and Oxygen Desorption Processes»
PACS numbers: 61.05.cp, 68.43.Vx, 81.07.Bc, 81.70.Pg, 82.80.Jp, 82.80.Ms
Results of mass-spectrometry and X-ray investigations of hydrogen deintercalation processes from intercalated HхWS2 (0???х???1.55), HхМоS2 (0???х???0.45) nanophases and oxygen desorption process from their surface are presented. As revealed with the results of mass-spectrometry studies, the oxygen desorption processes from the surface of HхWS2 and НхMoS2 nanoparticles occurs in the О2 form. Oxygen release for HxWS2 (0.67???х???1.55) takes place at 800–1100 K (with a maximum of release at 900 K) and precedes hydrogen deintercalation process in molecular form (1000 K) that is accompanied also by release of hydrogen sulphide at higher temperatures (1200–1300 K). Temperatures of oxygen desorption and its intensity appreciably depend on kinetic factors and average sizes of nanoparticles. Correlations between the mentioned processes and structural properties of anisotropic nanoparticles, and also changes of their average sizes are revealed.