Hydrogen generation by hydrolysis of sodium borohydride on CoB/SiO(2) catalyst

NCU Institutional Repository > 工學院 > 化學工程與材料工程學系 > 期刊論文 > Item 987654321/49952

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/49952

题名:	Hydrogen generation by hydrolysis of sodium borohydride on CoB/SiO(2) catalyst
作者:	Yang,CC;Chen,MS;Chen,YW
贡献者:	化學工程與材料工程學系
关键词:	NABH4 SOLUTION;NICKEL-BORIDE;FOAM;CO
日期:	2011
上传时间:	2012-03-27 16:27:15 (UTC+8)
出版者:	國立中央大學
摘要:	Generation of hydrogen by hydrolysis of alkali metal hydrides has attracted attention. Unsupported CoB catalyst demonstrated high activity for the catalytic hydrolysis of NaBH(4) solution. However, unsupported CoB nanoparticles were easy to aggregate and difficult to reuse. To overcome these drawbacks, CoB/SiO(2) was prepared and tested for this reaction. Cobalt (II) acetate precursor was loaded onto the SiO(2) support by incipient-wetness impregnation method. After drying at 100 degrees C, Co cations were deposited on the support. The dried sample was then dispersed in methanol/water solution and then fully reduced by NaBH(4) at room temperature. The catalyst was characterized by N(2) sorption, XRD and XPS. The results indicated that the CoB on SiO(2) possessed amorphous structure. B and Co existed both in elemental and oxidized states. SiO(2) not only affected the surface compositions of CoB, but also affected the electronic states of Co and B. B could donate partial electron to Co. The structure effect caused by the SiO(2) support helped to prevent CoB nanocluster from aggregation and therefore the activity increased significantly on hydrolysis of alkaline NaBH(4) solution. The CoB/SiO(2) catalyst showed much higher activity than the unsupported CoB catalyst. At 298 K, the hydrogen generation rate on CoB/SiO(2) catalyst was 4 times more than that on the unsupported CoB catalyst. The hydrogen generation rate was as high as 10,586 mL min(-1) g(-1) catalyst at 298 K. CoB/SiO(2) is a very promising catalyst for this reaction. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
關聯:	INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
显示于类别:	[化學工程與材料工程學系 ] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	404	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....