Abstract：The effect of mixed catalyst CoB/ La2O3 on hydrolysis of NaBH4 was studied through drainage method. The results show that the rate of hydrogen release of samples doped with CoB/ La2O3 presents an obvious increase with the amount of CoB/La2O3 when the amount of CoB/ La2O3 is between 1%-4%. Among all samples, the hydrogen release rate of the sample doped with 4%(70% CoB and 30% La2O3 ) is the fast about 260 mL/min. However, the result from research of the amount of hydrogen release showed that the amount of the mixed catalyst Co2B/ La2O3 and ratio have an obvious influence on hydrogen release amount of NaBH4. In addition, the results showed that the sample doped with 4%(80% CoB and 20% La2O3 ) has the largest hydrogen amount and reaches at 575 mL, while the rate of hydrogen release presents a decrease trend.
[1] Bartels J R, Pate M B, Olson N K, An economic survey of hydrogen production from conventional and alternative energy sources[J], International Journal of Hydrogen Energy, 2010, 35(16): 8371-8384.[2] Santosd M F, Sequeira C A C, Sodium borohydride as a fuel for the future[J], Renewable and Sustainable Energy Reviews, 2011, 15(8) : 3980 - 4001. [3] Bai Y, Wu C, Wu F, et al. Thermal decomposition kinetics of light-weight composite NaNH2-NaBH4 hydrogen storage materials for fuel cells[J], International Journal of Hydrogen Energy, 2012, 37 (17) : 12973 - 12979.[4] Schlesinger H I, Brown H C, Finholt A E. J Am Chem Soc[J], 1953, 75: 205.[5] Schlesinger H I, Brown Herbert C, Finholt A E et al. J Am Chem Soc[J], 1953, 75: 215.[6] Kim I, Bong S, Woo S, et al. Highly active 40 wt.% PtRu/C anode electrocatalysts for PEMFCs prepared by an improved impregnation method. Int J Hydrogen Energy[J], 2011, 36: 1803-1812.[7] Zou YC, Huang YM, Li X, et al. A durable ruthenium catalyst for the NaBH4. Int J Hydrogen Energy[J], 2011, 36: 4315-4322.[8] Lanhua Yi, Benan Hu, Yunfeng Song. et al. Studies of electrochemical performance of carbon supported Pt–Cu nanoparticles as anode catalysts for direct borohydride–hydrogen peroxide fuel cell. Journal of Power Sources, 2011, 196: 9924–9930.[9] J Delmas, L Laversenne, I Rougeaux, et al. Improved hydrogen storage capacity through hydrolysis of solid NaBH4 catalyzed with cobalt boride. Int J Hydrogen Energy [J], 2011, 36: 2145-2153.[10] J. Zhao, H. Ma, J. Chen. Improved hydrogen generation from alkaline NaBH4 solution using carbon-supported Co-B as catalysts. Int J Hydrogen Energy[J], 2007, 32: 4711-4716.[11] R. Fernandes, N. Patel, A. Miotello. Hydrogen generation by hydrolysis of alkaline NaBH4 solution with Cr-promoted Co–B amorphous catalyst. Applied Catalysis B:Environmental [J], 2009, 92: 68-74.[ 2] D Y Xu, H Z Wang, Q J Guo, et al. Catalytic behavior of carbon supported Ni–B, Co–B and Co–Ni–B in hydrogen generation by hydrolysis of KBH4. Fuel Processing Technology [J], 2011, 92: 1606-1610.[13] Xu Dong yan, Wang Hai zhen, Guo Qing jie et al. Fuel Processing Technology[J], 2011, 92: 1606.[14] Fernandes R, Patel N, Miotello A et al. Int J Hydrogen Energy[J], 2011, 36: 13379.
2016, Vol. 23 
