Hydrogen desorption process in Mg2Ni hydrides
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Sociedad Mexicana de Física A.C.
2006
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| _version_ | 1876447227665186816 |
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| author | J.L. Iturbe-García |
| author_facet | J.L. Iturbe-García |
| contents | Hydrogen desorption process in Mg2Ni hydrides J.L. Iturbe-García B.E. López-Muñoz R. Basurto S. Millán Física, Astronomía y Matemáticas hydriding Mg2Ni alloy dehydriding dehydriding rates intermetallic hydrides One of the most interesting intermetallic compounds investigated for energy storage purposes has been the Mg2Ni alloy which was preparedby mechanical alloying. Hence it was used here for hydriding-dehydriding implied mechanisms studies. Hydrogenation of milling preparedMg2Ni alloy samples under a 1 MPa H2 flux at 473K for 5 min allowed the formation of two Mg2Ni-hydrides which were identified bythe empirical formulae Mg2NiH4 and Mg2NiH0:3 [1]. Dehydriding behavior along the temperature range from 298 to 623K was recordedby Thermo Gravimetric Analysis (TGA). TGA spectrum exhibited two weight decrease peaks. The maximum hydrogen amount desorbedwas 3.95 § 0.01 wt%. Isotherms between 470 and 600K, every 30K, were obtained by using the same technique, showing a discontinuitywhich might be associated with a dehydriding process taking place in two steps. Approximately 40-50% of the total H2 content seems to bedesorbed in the first faster step. The present results might confirm that the two hydrides formed present a differentiated desorption outline. 2006 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57065211 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.4 Vol.52 |
| format | Artículo científico |
| id | redalyc_57065211 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Sociedad Mexicana de Física A.C. |
| spellingShingle | Hydrogen desorption process in Mg2Ni hydrides J.L. Iturbe-García Física, Astronomía y Matemáticas hydriding Mg2Ni alloy dehydriding dehydriding rates intermetallic hydrides Hydrogen desorption process in Mg2Ni hydrides J.L. Iturbe-García B.E. López-Muñoz R. Basurto S. Millán Física, Astronomía y Matemáticas hydriding Mg2Ni alloy dehydriding dehydriding rates intermetallic hydrides One of the most interesting intermetallic compounds investigated for energy storage purposes has been the Mg2Ni alloy which was preparedby mechanical alloying. Hence it was used here for hydriding-dehydriding implied mechanisms studies. Hydrogenation of milling preparedMg2Ni alloy samples under a 1 MPa H2 flux at 473K for 5 min allowed the formation of two Mg2Ni-hydrides which were identified bythe empirical formulae Mg2NiH4 and Mg2NiH0:3 [1]. Dehydriding behavior along the temperature range from 298 to 623K was recordedby Thermo Gravimetric Analysis (TGA). TGA spectrum exhibited two weight decrease peaks. The maximum hydrogen amount desorbedwas 3.95 § 0.01 wt%. Isotherms between 470 and 600K, every 30K, were obtained by using the same technique, showing a discontinuitywhich might be associated with a dehydriding process taking place in two steps. Approximately 40-50% of the total H2 content seems to bedesorbed in the first faster step. The present results might confirm that the two hydrides formed present a differentiated desorption outline. 2006 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57065211 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.4 Vol.52 |
| title | Hydrogen desorption process in Mg2Ni hydrides |
| topic | Física, Astronomía y Matemáticas hydriding Mg2Ni alloy dehydriding dehydriding rates intermetallic hydrides |
| url | https://www.redalyc.org/articulo.oa?id=57065211 |