Facile hydrogen generation using colloidal carbon supported cobalt to catalyze hydrolysis of sodium borohydride

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• 作者：Jie Zhu ; Rong Li ; Weiling Niu ; Yanjun Wu ; Xinglong Gou ; ^{gouxlr@126.com}
• 关键词：Sodium borohydride ; Hydrolysis ; Hydrogen generation ; Cobalt catalysts ; Colloidal carbon spheres
• 刊名：Journal of Power Sources
• 出版年：2012
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：1 August, 2012
• 卷：211
• 期：Complete
• 页码：33-39
• 文件大小：1177 K

摘要

Colloidal carbon spheres (CCS) obtained from hydrothermal treatment of glucose are employed for the first time as a support for cobalt catalysts (CCS/Co) prepared by impregnation-chemical reduction method. Ultra-fine, almost amorphous cobalt metals bind tightly to the CCS surface and are distributed uniformly, creating highly-dispersed active sites which lead to facile catalysis of the hydrolysis of sodium borohydride in aqueous alkaline solution and rapid generation of hydrogen. An average hydrogen generation rate of 7.5, 8.4 and 10.4聽L聽min^鈭?路g_met^鈭? is achieved at 20聽掳C for the CCS/Co catalysts with a Co loading content of 14.00, 15.45 and 18.38聽wt%, respectively. The activation energy and enthalpy of the CCS/Co catalyzed NaBH₄ hydrolysis are found to be 24.04 and 21.51聽kJ聽mol^鈭?, respectively. The low activation energy and rapid hydrogen generation rate suggest that the CCS-support Co materials are excellent catalysts for hydrogen production from borohydride hydrolysis.