The effect of TTNT nanotubes on hydrogen sorption using MgH2

Materials Research

Mariana Coutinho Brum¹  Paula Mendes Jardim¹  Monique Osorio Talarico Da Conceição¹  Dilson Silva Dos Santos¹ 

[1] ,Universidade Federal do Rio de Janeiro Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia Programa de Engenharia Metalúrgica e de MateriaisRio de Janeiro RJ ,Brasil

关键词: hydrogen storage materials;    magnesium hydride;    mechanical milling;    nanotubes;   

DOI  :  10.1590/S1516-14392013005000035

来源: SciELO

【 摘 要 】

Nanotubes are promising materials to be used with magnesium hydride, as catalysts, in order to enhance hydrogen sorption. A study was performed on the hydrogen absorption/desorption properties of MgH2 with the addition of TTNT (TiTanate NanoTubes). The MgH2-TTNT composite was prepared by ball milling and the influence of the TTNT amount (1.0 and 5.0 wt. (%)) on the hydrogen capacity was evaluated. The milling of pure MgH2 was performed for 24 hours and afterwards the MgH2-TTNT composite was milled for 20 minutes. Transmission Electronic Microscopy (TEM) and Scanning Electron Microscopy (SEM) were used to evaluate the nanotube synthesis and show the particle morphology of the MgH2-TTNT composite, respectively. The Differential Scanning Calorimetry (DSC) examination provided some evidence with the shifting of the peaks obtained when the amount of TTNT is increased. The hydrogen absorption/desorption kinetics tests showed that the TTNT nanotubes can enhance hydrogen sorption effectively and the total hydrogen capacity obtained was 6.5 wt. (%).

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