Calorimetric investigation of interactions in the LaNi4.75Al0.25−H2 and LaNi4.8Sn0.2−H2 systems

Autor:	E. A. Filatova, N. A. Yakovleva, Semenenko Kirill N
Rok vydání:	1999
Předmět:	Standard enthalpy of reaction Hydrogen Chemistry Enthalpy Intermetallic Thermodynamics chemistry.chemical_element General Chemistry Calorimetry Atmospheric temperature range Metal visual_art visual_art.visual_art_medium Physical chemistry Titration
Zdroj:	Russian Chemical Bulletin. 48:1817-1820
ISSN:	1573-9171 1066-5285
DOI:	10.1007/bf02494732
Popis:	The interaction of hydrogen with intermetalic compounds LaNi4.75Al0.25 and LaNi4.8Sn0.2 has been studied in the temperature range 308–353 K by the calorimetry titration method. The mechanism of hydrogenation was investigated. It was shown that, as the temperature increases, the initial concentration of hydrogen in the metal lattice needed for β-hydride formation decreases. It was assumed that this effect is related to the concentration of Hδ+ atoms, which “oxidize” the metallic matrix according to the scheme Hδ++M0→Hδ−+M+. The enthalpy and entropy of hydrogenation for the LaNi4.75Al0.25−H2 system were calculated from thep-C-T curves and the calorimetry results. The thermodynamic parameters of the LaNi4.8Sn0.2−H2 system were obtained for the first time.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c2d38b9111623df3d4ea93209275ff1c https://doi.org/10.1007/bf02494732 Zobrazit plný text záznamu Full text from SpringerLink