Hydrogen Uptake Enhancement by the Use of a Magnesium Hydride and Carbon Nanotubes Mixture

AUTOR(ES)

Campos, Rodrigo Bezerra Vasconcelos, Camargo Junior, Sergio Alvaro de Souza, Brum, Mariana Coutinho, Santos, Dilson Silva dos

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

27/11/2017

RESUMO

Studies show that the carbon nanotubes (CNTs) serve as hydrogen diffusion channels, when used with magnesium hydride. The hydrogen sorption study, of a MgH2 and 5wt% of multiwalled carbon nanotubes mixture, was the main purpose of this work. The samples were analyzed by means of X-ray diffraction (XRD) and also studied in a differential scanning calorimeter (DSC). The carbon nanotubes, that were ball milled during 20 min to the MgH2, were observed in the scanning electron microscopy (SEM) images. The mixture of MgH2-CNT turned out to enhance the hydrogen sorption when compared to pure MgH2 and in 5 min it desorbed around 5 wt% of hydrogen, at 350oC and 0.1 bar.

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