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Hydrogen generation from Al/NaBH4 hydrolysis promoted by Co nanoparticles and NaAlO2 solution

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  • Fan, Mei-qiang
  • Wang, Yu
  • Tang, Rui
  • Chen, Da
  • Liu, Wei
  • Tian, Guang Lei
  • Lv, Chun Ju
  • Shu, Kang-ying

Abstract

This study evaluated hydrogen generation through the hydrolysis of an Al/NaBH4/Co/NaAlO2 system. Hydrogen generation performance can be altered by changing the Al/NaBH4 mass ratios, Co amount and NaAlO2 concentration. The optimized composite can achieve a hydrogen yield of more than 90% within 30 min. Thus, a high hydrogen generation amount and a stable solution pH were achieved. The kinetic analysis results of the Al/NaBH4/Co/NaAlO2 system show that the hydrolysis kinetic is affected by composition design. An activation energy of 53.3 kJ/mol was obtained from 0.2 g Al/0.2 g NaBH4/0.06 g Co nanoparticles/4 mL 0.4 M NaAlO2 solution, which confirms the control exerted by the chemical step. The improved hydrogen generation performance is attributed to the interaction of Al/NaBH4 hydrolysis and the synergistic catalytic effect of Co nanoparticles and NaAlO2. Thus, the mechanism that unifies the behavior of Al/NaBH4 hydrolysis, which is activated by Co nanoparticles and NaAlO2, is presented. As a potential hydrogen source, the Al/NaBH4/Co/NaAlO2 system can be applied for portable fuel cells with high hydrogen generation density and low cost compared with a conventional NaBH4 alkaline solution.

Suggested Citation

  • Fan, Mei-qiang & Wang, Yu & Tang, Rui & Chen, Da & Liu, Wei & Tian, Guang Lei & Lv, Chun Ju & Shu, Kang-ying, 2013. "Hydrogen generation from Al/NaBH4 hydrolysis promoted by Co nanoparticles and NaAlO2 solution," Renewable Energy, Elsevier, vol. 60(C), pages 637-642.
    • Handle: RePEc:eee:renene:v:60:y:2013:i:c:p:637-642
    DOI: 10.1016/j.renene.2013.06.003
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    References listed on IDEAS

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    1. Fan, Mei-Qiang & Liu, Shu & Sun, Wen Qiang & Fei, Yong & Pan, Hua & Shu, Kang-Ying, 2012. "Controllable hydrogen generation and hydrolysis mechanism of AlLi/NaBH4 system activated by CoCl2 solution," Renewable Energy, Elsevier, vol. 46(C), pages 203-209.
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    Cited by:

    1. Wang, Yan & Shen, Yan & Qi, Kezhen & Cao, Zhongqiu & Zhang, Ke & Wu, Shiwei, 2016. "Nanostructured cobalt–phosphorous catalysts for hydrogen generation from hydrolysis of sodium borohydride solution," Renewable Energy, Elsevier, vol. 89(C), pages 285-294.
    2. Awad, A.S. & El-Asmar, E. & Tayeh, T. & Mauvy, F. & Nakhl, M. & Zakhour, M. & Bobet, J.-L., 2016. "Effect of carbons (G and CFs), TM (Ni, Fe and Al) and oxides (Nb2O5 and V2O5) on hydrogen generation from ball milled Mg-based hydrolysis reaction for fuel cell," Energy, Elsevier, vol. 95(C), pages 175-186.
    3. Liu, Yongan & Wang, Xinhua & Liu, Haizhen & Dong, Zhaohui & Li, Shouquan & Ge, Hongwei & Yan, Mi, 2014. "Improved hydrogen generation from the hydrolysis of aluminum ball milled with hydride," Energy, Elsevier, vol. 72(C), pages 421-426.

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