Enhancement of the hydrogen storage properties of Mg/C nanocomposites prepared by reactive milling with molybdenum |
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| Authors: | Zongying Han Shixue Zhou Haipeng Chen Haili Niu Naifei Wang |
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| Affiliation: | 1.College of Chemical and Environmental Engineering,Shandong University of Science and Technology,Qingdao,China;2.School of Chemical and Environmental Engineering,China University of Mining and Technology,Beijing,China |
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| Abstract: | The effect of Mo on the morphology, crystal structure and hydrogen sorption properties of Mg/C composites prepared by reactive milling was studied. Transmission electron microscopic (TEM) observation shows that Mg/C composites prepared with the addition of Mo are of nanoscale with particle size about 20-120 nm after 3 h of milling under 1 MPa H2. MgH2 of tetrahedral crystal structure predominates in the materials with the geometric shape of oblique hexagonal prism. From X-ray diffraction (XRD) and hydrogen content studies, Mo and crystallitic carbon have a synergistic effect on promoting the hydrogenation rate in the reactive milling process. From differential scanning calorimetric (DSC) studies, the dehydrogenation peak temperature of the Mg/C materials with Mo is lowered to 299-340 °C. |
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