Synthesis and characterization of Co/SiO2 as catalyst catalyze hydrogen generation |
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| Authors: | Chia-Chi Su Yu-Jen Shih Yao-Hui Huang Ming-Chun Lu |
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| Affiliation: | 1. Korea Institute for Skin and Clinical Sciences and Molecular-Targeted Drug Research Center, Konkuk University, Seoul, Korea;2. Department of Dermatology, Konkuk University School of Medicine, Seoul, Korea;3. Department of Pharmacology and Biomedical Science Project (BK21PLUS), Seoul National University College of Medicine, Seoul, Korea;1. University of Ioannina, Department of Chemistry, Sector of Inorganic and Analytical Chemistry, 45110 Ioannina, Greece;2. University of Ioannina, Medical School, Medical Physics Laboratory, 45110 Ioannina, Greece;3. National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, Vas. Constantinou 48, 11635 Athens, Greece |
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| Abstract: | Novel composites of porous SiO2-LP and SiO2-HP supports are synthesized by the silica–polyethylene glycol monooleyl ether surfactant self-assembly method to obtain a large surface area. Cobalt is immobilized in the supports by incipient wetness impregnation. A stable and active Co/SiO2 catalyst is examined using FE-SEM, BET and XRD. Further, the catalyst is tested for catalytic hydrolysis of alkaline sodium borohydride (NaBH4) solution: the rate of hydrogen generation is found to increase with increasing cobalt loading of the Co/SiO2 catalyst. The hydrogen generation rates increase dramatically when the temperature is increased from 17 to 40 °C. The highest hydrogen generation rates of Co/SiO2 catalyst are obtained at 2513 mL min? 1 g? 1 in 20 mL of 5 wt.% NaBH4 solution containing 5 wt.% NaOH at 40 °C. |
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