Porosity control in nanoporous carbide-derived carbon by oxidation in air and carbon dioxide

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• 作者：S. Osswald ; C. Portet ; Y. Gogotsi ; G. Laudisio ; J.P. Singer ; J.E. Fischer ; V.V. Sokolov ; J.A. Kukushkina ; A.E. Kravchik
• 关键词：Oxidation ; Carbide-derived carbon ; Carbon dioxide ; Activation ; Porosity
• 刊名：Journal of Solid State Chemistry
• 出版年：2009
• 出版时间：July 2009
• 年：2009
• 卷：182
• 期：7
• 页码：1733-1741
• 全文大小：685 K

文摘

Carbide-derived carbons (CDC) allow a precise control over the pore size through the selection of the carbide precursor and varying of the synthesis conditions. However, their pore volume is limited by the carbide stoichiometry. While activation of carbons derived from various organic precursors has been widely studied, this process may similarly be able to increase the pore volume and specific surface area of CDC. Oxidation of carbide-derived carbon in air and CO₂ at different temperatures and times allows for significant increase in pore volume and specific surface area as well as control over average pore size with subnanometer accuracy. The effect of activation and associated changes in the pore volume and surface area on the hydrogen uptake are also discussed.