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Assembly of graphitized carbon nanowalls containing crystallites with the ideal interlayer distance was formed as a Voronoi cell structure of close-packed template nanoparticles. The assembly showed faster Li-ion intercalation and deintercalation than conventional graphite, a superhydrophobicity, which was retained even after thermal oxidation, and a high stability under electrochemical oxidative...
Carbon materials containing Fe coordinated by N atoms (Fe–Nx moiety) embedded in the surface have been attracting much attention as noble-metal-free oxygen reduction catalysts for polymer electrolyte fuel cells. A carbonaceous thin film containing N-coordinated Fe and Co was formed from Fe and Co phthalocyanines on the basal plane of highly-oriented pyrolytic graphite to fundamentally investigate...
Saw-dust of Japanese cypress, which was often used as a raw material of activated carbon, impregnated with an aqueous solution of halide or organic acid salt was carbonized and the porosities of the carbonized samples were measured. When saw-dust impregnated with potassium or sodium iodide or bromide was carbonized at 800°C, chemical activation occurred and the carbonized sample had a larger specific...
Graphene layers with silica pillars which widen the interlayer distance and functionalize the space as micropores have been prepared as one of the new porous carbon materials. In this study, the silica-pillared graphene with Fe–N units as a catalytic active site for cathodic oxygen reduction was formed as a new type of carbonaceous noble-metal-free oxygen reduction catalysts with the ordered pore...
In contrast to conventional solid materials used as precursors for carbon materials, which are typically organic polymers and macromolecules, a solid of relatively small organic molecules mixed with metal salts was directly used to form a functional carbon material. Heat treatment of a mixture of 1,4-diamino-2,3-dicyano-9,10-anthraquinone, Fe gluconate, and Mg acetate produced a highly porous carbon...
Carbon materials are often used as catalyst supports, and for catalysts in electrodes of a polymer electrolyte fuel cell, carbon black has been used. Recently, it was found, however, that activated carbon could replace carbon black and besides, significantly improve the activity of the electrode catalyst layer for oxygen reduction. In the present study, to optimize the pore structure of activated...
Microporous carbons for use as adsorbents in removing chloroform from drinking water were prepared by activating charcoals made from the following natural raw materials: evergreen oak (Q. phillyraeoides), bamboo (P. pubescens), coconut shell (C. nucifera), and Japanese cedar (C. japonica), and from dehydrochlorinated vinylidene film. Chloroform adsorption was found to be enhanced by increase in the...
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