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Citation: CAI Fan, SHEN Xiao-Chen, DAI Min, GAO Ming, WANG Zhi-Bin, ZHAO Bin, DING Wei-Ping. Catalytic Performance of CoB/C for Hydrolysis of NaBH4 Aqueous Solution[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(4): 689-696. doi: 10.3969/j.issn.1001-4861.2013.00.143 shu

Catalytic Performance of CoB/C for Hydrolysis of NaBH4 Aqueous Solution

  • 1.

    1 Key laboratory of Mesoscopic Chemistry of MOE, School of Chemistry & Chemical Engineering, Nanjing University, Nanjing 210093, China;

  • Received Date: 13 November 2012
    Available Online: 16 January 2013

    Fund Project: 江苏省自然科学基金(No.BK2010387) (No.BK2010387)国家自然科学基金(No.41172239) (No.41172239)中央高校基础科研业务费专项基金(No.1118020513, 1106020513)资助项目。 (No.1118020513, 1106020513)

  • The activated carbon supported CoB catalysts were prepared by using impregnation-reduction method (denoted as CoB/C-Imp) and electroless deposition method (denoted as CoB/C-ED), respectively. The catalytic properties were studied on the hydrolysis of NaBH4 aqueous solution. The catalytic activity of CoB/C-ED, CoB/C-Imp and unsupported CoB was 2 022, 2 503 and 1 351 mL·min-1·g-1 (Co), respectively. After 5 cycles, the CoB/C-ED could retain 70% initial activity, but CoB/C-Imp and unsupported CoB could only retain 30% and 10% initial activity. The CoB/C-ED shows the best catalytic performance. Furthermore, no obvious decrease in the activity is observed for CoB/C-ED even after it is exposed to air for 30 days, this good anti-oxidation property is favorable for storage and use. Further physicochemical characterization of these catalysts reveals that the unsupported CoB is easily agglomerated and the size of the secondary particles is in the range of 400~800 nm. After CoB supported on carbon, the agglomeration is greatly restrained. The dispersion of CoB for the CoB/C catalysts is improved compared to the unsupported CoB. The support could also reduce the agglomeration of CoB particles during the catalytic reaction. The CoB particles combine much stronger with the activated carbon support for the CoB/C-ED catalyst, thus resulting in better dispersion and stability, and lesser leaching.
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