Hydrogen storage properties of space-confined NaAlH4 nanoparticles in ordered mesoporous silica

被引：177

作者：

Zheng, Shiyou ^{[1
]}

Fang, Fang ^{[1
]}

Zhou, Guangyou ^{[1
]}

Chen, Guoron ^{[1
]}

Ouyang, Liuzhang ^{[2
]}

Zhu, Min ^{[2
]}

Sun, Dalin ^{[1
]}

机构：

[1] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China

[2] S China Univ Technol, Sch Mat Sci & Technol, Guangzhou 510640, Guangdong, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 12期

关键词：

D O I：

10.1021/cm8002063

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：

A method that is used by space-confining NaAlH4 into the as-synthesized ordered mesoporous silica (OMS) is presented in the present work. NaAlH4 in the pores of OMS is obtained by impregnation and drying techniques. It has been found that the space-confined NaAlH4 in the pores of OMS shows the lower temperature and faster kinetics for dehydrogenation than that of the pristine NaAlH4. Moreover, in the absence of a catalyst, the rehydrogenation in a dehydrogenated NaAlH4 system with nanoscale particles and phases can be achieved even with the temperatures of 125-150 degrees C and the hydrogen pressures of 3.5-5.5 MPa. The physical limitation of the NaAlH4 particles, as well as the resulting Al and NaH phases, to be nanoscale in size by the pores of OMS is believed to be responsible for these.

引用

页码：3954 / 3958

页数：5

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