کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1625923 | 1516429 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamical stability and electronic structure of a perovskite-type hydride, NaMgH3
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Thermodynamical stability and electronic structure of a perovskite-type hydride, NaMgH3 Thermodynamical stability and electronic structure of a perovskite-type hydride, NaMgH3](/preview/png/1625923.png)
چکیده انگلیسی
Thermodynamical stability and electronic structure of a perovskite-type hydride, NaMgH3, exhibiting reversible decomposition and recombination reactions, were studied experimentally. NaMgH3 decomposes in two steps accompanying hydrogen desorption reactions, and the enthalpy change (ΔH) and the entropy change (ΔS) are calculated to be ΔH(1) = −93.9(6) kJ/mol H2 and ΔS(1) = −116.2(9) J/K mol H2 for the first step, and ΔH(2) = −102.2(4) kJ/mol H2 and ΔS(2) = −125.9(6) J/K mol H2 for the second step, respectively. Maximum entropy method (MEM)/Rietveld analysis of synchrotron X-ray diffraction profiles indicated that NaMgH3 contains two hydrogen anions at the different occupation sites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volumes 446–447, 31 October 2007, Pages 162–165
Journal: Journal of Alloys and Compounds - Volumes 446–447, 31 October 2007, Pages 162–165
نویسندگان
K. Ikeda, S. Kato, Y. Shinzato, N. Okuda, Y. Nakamori, A. Kitano, H. Yukawa, M. Morinaga, S. Orimo,