Kinetics of NaBH4 hydrolysis on carbon-supported ruthenium catalysts

被引：59
作者：
Zou, Y. C. [1 ]
Nie, M. [1 ]
Huang, Y. M. [1 ]
Wang, J. Q. [2 ]
Liu, H. L. [1 ]
机构：
[1] E China Univ Sci & Technol, Dept Chem, Minist Educ, Key Lab Specially Funct Polymer Mat & Related Tec, Shanghai 200237, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 19期
基金：
中国国家自然科学基金;
关键词：
Kinetics; Sodium borohydride; Hydrolysis reaction; Ru/C catalyst; SODIUM-BOROHYDRIDE SOLUTION; IMPROVED HYDROGEN GENERATION; COBALT CATALYST; B CATALYST; CO-B;
D O I：
10.1016/j.ijhydene.2011.06.138
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：
In this work, different shapes (powder and spherical) of ruthenium-active carbon catalysts (Ru/C) were prepared by impregnation reduction method for hydrogen generation (HG) from the hydrolysis reaction of the alkaline NaBH4 solution. The effects of temperature, amount of catalysts, and concentration of NaOH and NaBH4 on the hydrolysis of NaBH4 solution were investigated with different shapes of Ru/C catalysts. The results show that the HG kinetics of NaBH4 solution with the powder Ru/C catalysts is completely different from that with the spherical Ru/C catalysts. The main reason is that both mass and heat transfer play important roles during the reaction with Ru/C catalysts. The HG overall kinetic rate equations for NaBH4 hydrolysis using the powder Ru/C catalysts and the spherical catalysts are described as r = A exp (-50740/RT) [catalyst](1.05) [NaOH](-0.13) [NaBH4](-0.25) and r = A exp (-52,120/RT) [catalyst](1.00) [NaOH](-0.21) [NaBH4](0.27) respectively. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：12343 / 12351
页数：9
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