Sodium alanate nanoparticles -: Linking size to hydrogen storage properties

被引：204

作者：

Balde, Cornelis P. ^{[1
]}

Hereijgers, Bart P. C. ^{[1
]}

Bitter, Johannes H. ^{[1
]}

de Jong, Krijn P. ^{[1
]}

机构：

[1] Univ Utrecht, Dept Chem, Inorgan Chem & Catalysis, NL-3584 CA Utrecht, Netherlands

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2008年 / 130卷 / 21期

关键词：

D O I：

10.1021/ja710667v

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Important limitations in the application of light metal hydrides for hydrogen storage are slow kinetics and poor reversibility. To alleviate these problems doping and ball-milling are commonly applied, for NaAlH4 leading to particle sizes down to 150 nm. By wet-chemical synthesis we have prepared carbon nanofiber-supported NaAlH4 with discrete particle size ranges of 1-10 mu m, 19-30 nm, and 2-10 nm. The hydrogen desorption temperatures and activation energies decreased from 186 degrees C and 116 kJ(.)mol(-1) for the largest particles to 70 degrees C and 58 kJ(.)mol(-1) for the smallest particles. In addition, decreasing particle sizes lowered the pressures needed for reloading. This reported size-performance correlation for NaAlH4 may guide hydrogen storage research for a wide range of nanostructured light (metal) hydrides.

引用

页码：6761 / 6765

页数：5

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