Recording of hydrogen evolution -: a way for controlling the doping process of sodium alanate by ball milling

被引：45

作者：

Bellosta von Colbe, JM ^{[1
]}

Bogdanovic, B ^{[1
]}

Felderhoff, M ^{[1
]}

Pommerin, A ^{[1
]}

Schüth, F ^{[1
]}

机构：

[1] Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2004年 / 370卷 / 1-2期

关键词：

sodium alanate for hydrogen storage; ball milling; monitoring of gas evolution (absorption);

D O I：

10.1016/j.jallcom.2003.09.146

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 simple equipment was developed which allows to monitor gas evolution or absorption occurring in the course of a ball milling process. The equipment has been applied to characterize via hydrogen evolution the reduction process of metal halides used as doping agents in the preparation of sodium alanate hydrogen storage materials. The gas flow curves resulting from the measurements (Figs. 2-4) deliver useful informations concerning the rate, progress and completion of each of the involved reduction process, so that the stoichiometry of the underlying chemical reactions could be conceived or confirmed (Eqs. (3)-(7)). In the preparation of sodium alanate hydrogen storage materials, the presented method can help to find out ball milling parameters necessary to produce an optimal catalytic activity of a dopant. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：104 / 109

页数：6

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