Kinetics of Ru-promoted sulphated zirconia catalysed hydrogen generation by hydrolysis of sodium tetrahydroborate

被引：84

作者：

Demirci, U. B. ^{[1
]}

Garin, F. ^{[1
]}

机构：

[1] ULP, ECPM, LMSPC, CNRS, F-67000 Strasbourg, France

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2008年 / 279卷 / 01期

关键词：

hydrogen; kinetics; Ru-promoted sulphated zirconia; sodium tetrahydroborate;

D O I：

10.1016/j.molcata.2007.09.025

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：

Pure hydrogen can be catalytically generated by hydrolysis of sodium tetrahydroborate NaBH4. The present paper reports the kinetics of hydrolysis of aqueous alkaline solution of NaBH4. The investigated catalyst was 1 wt% Ru-promoted sulphated zirconia. The reaction orders for both NaBH4 and NaOH, the reaction order for Ru and the apparent activation energy were determined. The hydrogen generation rate can be written following a power law: r = k[NaBH4](0.23)[NaOH](-0.35)[Ru](1.27). The activation energy for the hydrogen generation reaction is of 76 kJ mol(-1). Otherwise, the present paper shortly reviews the kinetic data that are available in the open literature and notices the discrepancies that exist for these data. The kinetic data of the present study also contribute to these discrepancies. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：57 / 62

页数：6

共 33 条

[1] A safe, portable, hydrogen gas generator using aqueous borohydride solution and Ru catalyst [J].