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Effects of Mechanical Ball Milling with Active Gases on Hydrogen Adsorption Behaviors of Graphite Flakes

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This study examined the effects of the mechanical milling conditions on the hydrogen adsorption behaviors of graphite flakes under different gas streams. A ball mill technique with various gas streams during treatments was used to introduce oxygen-containing functional groups on the graphite surfaces. The structural properties of graphite were evaluated by XRD, and the surface properties and textural properties were observed SEM, FT-IR, XPS and N2/77 K adsorption isotherms. The hydrogen adsorption behavior of the graphite flakes were evaluated using a volumetric method at room temperature and 100 atm. The mechanically-milled graphite flakes under an oxygen stream showed a higher concentration of oxygen functional groups and greater hydrogen adsorption capacity than that of graphite flakes under an argon stream. This suggests that oxygen functional groups have good chemical affinity with hydrogen molecules in this system.
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Document Type: Research Article

Publication date: 2012-07-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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