Title of article :
Investigation of single-walled carbon nanotubes-titanium metal composite as a possible hydrogen storage medium
Author/Authors :
Silambarasan، نويسنده , , D. S. Surya Narayana، نويسنده , , V.J. and Vasu، نويسنده , , V. and Iyakutti، نويسنده , , K.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Abstract :
The present experimental work deals with the investigation of hydrogen uptake study of single-walled carbon nanotubes (SWCNTs-Ti)-titanium metal composite. The mixture containing SWCNTs and Ti powder is made into tablet by cold pressing. The composite has been prepared and hydrogenated by evaporating the tablet in hydrogen ambient on glass substrates using electron beam (EB) evaporation technique. Efficient hydrogen uptake of 4.74 wt.% is achieved with the composite and the adsorbed hydrogen posses the average hydrogen binding energy of 0.4 eV. The obtained hydrogen uptake is due to the cumulative adsorption of hydrogen by CNTs and Ti nanostructured materials. The physical properties are characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction study (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and Raman analysis. Hydrogenation and dehydrogenation behavior of the composite are studied using CHN-elemental analysis and thermo gravimetric/thermal desorption spectroscopy (TG/TDS) studies, respectively. The stored hydrogen is found to be 100% reversible in the temperature range of 160–310 °C.
Keywords :
Desorption temperature , Hydrogen storage , Electron beam evaporation , Binding energy , SWCNTs-Ti Composite
Journal title :
International Journal of Hydrogen Energy
Journal title :
International Journal of Hydrogen Energy