Calorimetric properties of C14 and C15 YMn2 and YMn2(H,D)6
| Autor: | R Wierzbicki, Y.Y. Chen, H. T. Kuo, Ru-Shi Liu, C.B. Tsai, Ramazan Asmatulu, Ivan Baginskiy, C.C. Yang, L.N. Fomicheva, H.H. Wu, J.C. Ho, A.V. Tsvyashchenko, Stanislaw M. Filipek, R. Sato |
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| Rok vydání: | 2011 |
| Předmět: |
Diffraction
Phase transition Hydrogen Renewable Energy Sustainability and the Environment Chemistry Energy Engineering and Power Technology Thermodynamics chemistry.chemical_element Calorimetry Condensed Matter Physics Magnetic susceptibility Hydrogen storage Fuel Technology Electrical resistivity and conductivity Isostructural |
| Zdroj: | International Journal of Hydrogen Energy. 36:2285-2290 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2010.11.037 |
| Popis: | The capacity of YMn 2 to undergo reversible hydrogenization makes this compound a potential candidate for hydrogen storage. This report describes the successful synthesis of YMn 2 H 6 from hexagonal C14 YMn 2 as well as calorimetric studies of hexagonal C14 YMn 2 , cubic C15 YMn 2 and their isostructural derivatives, YMn 2 H 6 and YMn 2 D 6 . Complementary structural and physical property characterizations include X-ray diffraction, electrical resistivity, and magnetic susceptibility measurements. Of particular interest is a hysteretic first-order phase transition in C15 YMn 2 near 100 K, which does not occur in C14 YMn 2 . Analysis of a specific heat anomaly that is associated with this transition reveals a substantial latent heat of 330 J/mol. No such anomalous specific heat exists in YMn 2 D 6 , suggesting that the transition is suppressed upon deuterization. |
| Databáze: | OpenAIRE |
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