Differences in the heterogeneous nature of hydriding/dehydriding kinetics of MgH2 - TiH2 nanocomposites

被引：24

作者：

Biasetti Andres, T. ^{[1
,2
,3
,4
]}

Zelis Luis, Mendoza ^{[2
,3
]}

Marcos, Meyer ^{[2
,3
]}

机构：

[1] CNEA, Ctr Atom Bariloche, Ave Bustillo 9500, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Univ Nacl La Plata, Dept Fis, La Plata, Buenos Aires, Argentina

[3] Consejo Nacl Invest Cient & Tecn CONICET, Inst Fis La Plata, Buenos Aires, DF, Argentina

[4] UNCo, Ctr Reg Univ Bariloche, Quintral 1250, San Carlos De Bariloche, Rio Negro, Argentina

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 51期

关键词：

Hydrogen storage; Nanocrystalline composites; Mg-Ti based hydrides; Heterogeneous kinetics; Mechanical milling; HYDROGEN STORAGE PROPERTIES; METAL HYDRIDE COMPOSITES; MAGNESIUM HYDRIDE; JOHNSON-MEHL; DESORPTION PROPERTIES; TRANSITION-METALS; PHASE-CHANGE; GRAIN-SIZE; NUCLEATION; SORPTION;

D O I：

10.1016/j.ijhydene.2020.07.042

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Fine powder dispersions of MgH2 - TiH2 composites were obtained through different manufacturing routes using reactive mechanical grinding. The as prepared powder dispersions were subjected to hydrogen sorption kinetics and the results clearly revealed a heterogeneous kinetic nature already reported in nanocrystalline MgH2. The differences observed in the heterogeneous kinetic of isothermal kinetics reveal a strong dependence on grain boundaries microstructure of the prepared hydrides. The basic findings described here suggest the need for studies to understand how the superposition of complex mechanisms are involved in kinetics regarding the microstructure. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：27421 / 27433

页数：13

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