Optimization of the pore structure of nickel/graphite hybrid materials for hydrogen storage |
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Authors: | Byung-Joo KimSoo-Jin Park |
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Affiliation: | a Nano Material Research Dept., Jeonju Institute of Machinery and Carbon Composites, Palbokdong 2ga, 817, Jeonju 561-844, South Korea b Dept. of Chemistry, Inha Univ., 253, Nam-gu, Incheon 402-751, South Korea |
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Abstract: | Nickel/graphite hybrid materials were prepared by mixed acid treatment of graphite flakes, following metal nanoparticle deposition. The textural properties were studied by BET surface area measurement and t-plot methods with N2/77 K adsorption isotherms. The hydrogen storage characteristics of the nickel/graphite at 298 K and 10 MPa were studied using a pressure-composition-temperature apparatus. The pore structure of the materials was studied as a function of processing conditions. In the optimum material, the hydrogen storage capacity was as high as 4.48 wt.%. The total amount of storage was not proportional to the specific surface area or metal content of the adsorbate. A dipole-induced model on nickel/carbon surfaces is proposed for the hydrogen storage mechanism. |
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Keywords: | Nickel/graphite hybrid materials Hydrogen storage Dipole-induced model |
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