Synthesis and dehydriding process of crystalline Ce(BH4)3

被引：30

作者：

Gennari, F. C. ^{[1
]}

Esquivel, M. R. ^{[1
]}

机构：

[1] Ctr Atom Bariloche CNEA, San Carlos De Bariloche, Rio Negro, Argentina

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 485卷 / 1-2期

关键词：

Hydrogen storage; Borohydrides; Dehydriding; Mechanical milling; HYDROGEN STORAGE; THERMAL-DECOMPOSITION; METAL; STABILITY; REVERSIBILITY; HYDRIDES; LIBH4;

D O I：

10.1016/j.jallcom.2009.06.078

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：

The synthesis of a new borohydride with a theoretical hydrogen capacity of 6 5 wt% is reported. Both XRD and FTIR studies demonstrate that Ce(BH4)(3) is obtained from mechanochemical reaction between CeCl3 and LiBH4. Dehydriding properties of Ce(BH4)(3) were investigated using XRD, DSC and volumetry using a Sievert-type device. Thermal decomposition of Ce(BH4)(3) led to 3 5 wt% hydrogen release in a multi-step process, involving an unknown intermediate compound and CeH2 It was observed that Ce(BH4)(3) IS partially reversible under 6 MPa of H-2 at 350 degrees C and absorbs 28% of the total hydrogen capacity obtained experimentally. The activation energy of Ce(BH4)(3) decomposition is 136 kJ mol(-1). (C) 2009 Elsevier B.V All rights reserved.

引用

页码：L47 / L51

页数：5

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