Enhanced catalytic effects of Co@C additive on dehydrogenation properties of LiAlH4

被引：15

作者：

Li, Li ^{[2
]}

Wang, Yijing ^{[1
]}

Jiao, Lifang ^{[1
]}

Yuan, Huatang ^{[1
]}

机构：

[1] Nankai Univ, Tianjin Key Lab Met & Mol Based Mat Chem, Key Lab Adv Energy Mat Chem,MOE, Inst New Energy Mat Chem,Collaborat Innovat Ctr C, Tianjin 300071, Peoples R China

[2] Univ Jinan, Sch Mat Sci & Engn, Key Lab Inorgan Funct Mat Univ Shandong, Jinan 250022, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 645卷

基金：

中国国家自然科学基金;

关键词：

Complex hydride; LiAlH4; Co@C; Dehydrogenation; REVERSIBLE HYDROGEN STORAGE; LI; REGENERATION; MG(BH4)(2); DESORPTION; STABILITY; HYDRIDES;

D O I：

10.1016/j.jallcom.2014.12.080

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 catalytic effects of Co@C additive on hydrogen storage properties of LiAlH4 prepared by ball milling have been systematically investigated. The onset desorption temperature of Co@C-LiAlH4 sample is 100.0 degrees C, which is 51 degrees C lower than that of as-received LiAlH4. Isothermal desorption results show that for Co@C-LiAlH4 dehydrogenated at 130 degrees C, 4.58 wt% of hydrogen can be released with 180 min, which is 3.56 wt% higher than that of as-received LiAlH4 under the same conditions. Approximately 7.05 wt% of hydrogen is released at 150 degrees C. Through the Kissinger desorption kinetics analyses, the apparent activation energy, E-a, of Co@C-LiAlH4 is calculated as 95.36 kJ mol (1) H-2 and 115.6 kJ mol (1) H-2 for the first two decomposition processes, respectively. It indicates that dehydrogenation kinetics of LiAlH4 matrix considerably improves by doping the Co@C catalyst. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：S468 / S471

页数：4

共 33 条

[1] Titanium catalyzed solid-state transformations in LiAlH4 during high-energy ball-milling [J].