Mg-Co-B Catalyst Assisted Hydrogen Generation from Thermal Decomposition of NaNH2-NaBH4 Composite

BAI Ying; WU Feng; YANG Jianhu; WANG Huali; BAO Liying; WU Chuan

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Mg-Co-B Catalyst Assisted Hydrogen Generation from Thermal Decomposition of NaNH2-NaBH4 Composite

BAI Ying,WU Feng,YANG Jianhu,WANG Huali,BAO Liying,WU Chuan * #

Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China

*Correspondence author

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Funding: Program for New Century Excellent Talents in University（No.NCET-13-0033）, National Natural Science Foundation of China （No.21476027）, Research Fund for the Doctoral Program of Higher Education of China（No.20121101110042）

Opened online:22 February 2016

Accepted by: none

Citation: BAI Ying,WU Feng,YANG Jianhu.Mg-Co-B Catalyst Assisted Hydrogen Generation from Thermal Decomposition of NaNH2-NaBH4 Composite[OL]. [22 February 2016] http://en.paper.edu.cn/en_releasepaper/content/4678259

On-site hydrogen supply is a key issue for the commercialization of fuel cells, which is one of the important ways for realizing a Hydrogen-economy society. Composite NaNH2-NaBH4 is regarded as a promising high-capacity hydrogen storage material. Here the composite NaNH2-NaBH4 (2/1) is synthesized via a solid-state ball milling method. In order to improve the hydrogen generation kinetics, a multiplex metal boride Mg-Co-B is selected as the catalysts. X-ray diffraction (XRD) finds that Na3BN2 and metal Na are by-products in the thermal decomposed sample. Thermogravimetry and differential thermal analysis (TG-DTA) indicates that the main decomposition stages of the catalyst promoted NaNH2-NaBH4 material are split into three stages. The activation energy of the Mg-Co-B promoted NaNH2-NaBH4 (2/1) material below 300℃ is 76.4KJ/mol, which is only 47.9% of that of the pristine NaNH2-NaBH4 (2/1), and implying much better hydrogen generation kinetics.

Keywords:Fuel cells; hydrogen storage material; thermal decomposition; kinetics; catalyst; metal boride

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