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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/60398


    Title: Preparation of magnetic cobalt-based catalyst for hydrogen generation from alkaline NaBH4 solution
    Authors: Liu, Cheng-Hong;Chen, Bing-Hung;Hsueh, Chan-Li;Ku, Jie-Ren;Tsau, Fanghei;Hwang, Kuo-Jen
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: Hydrogen generation;Cobalt-based catalyst;Sodium borohydride;Wet-chemical reduction process;Fuel cell
    Date: 2009-09
    Issue Date: 2011-10-13 22:37:34 (UTC+8)
    Publisher: Amsterdam: Elsevier BV
    Abstract: A fast and simple fabrication process, viz. a wet-chemical reduction process, was utilized for preparation of a cobalt-based catalyst to be used for hydrogen generation from alkaline NaBH4 solution. Characteristics of this cobalt-based catalyst were carried out by using various instruments, such as SEM/EDS, XPS, ICP, VSM, BET and TGA. The surface chemistry of the obtained catalyst is mainly cobalt oxides, not cobalt borides. Ferromagnetic property of the cobalt-based catalyst makes it convenient for being recycled from spent NaBH4 solution. The rate of hydrogen generation from catalyzed hydrolysis of alkaline NaBH4 solution was determined as a function of temperature, NaBH4 concentration, and NaOH concentration in the presence of prepared catalysts. In general, stable generation rate of highly pure hydrogen near 200 mL min−1 g−1 was achieved in 100 mL of 5 wt% NaBH4 solution containing 5 wt% NaOH solution and 200 mg of Co/IR-120 catalyst, in which no temperature runoff was observed during the course of hydrogen production. The activation energy of NaBH4 hydrolysis reaction was found at 66.67 kJ mol−1, which was comparable with others reported in the open literatures.
    Relation: Applied Catalysis B-Environmental 91(1-2), pp.368-379
    DOI: 10.1016/j.apcatb.2009.06.003
    Appears in Collections:[化學工程與材料工程學系暨研究所] 期刊論文

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