Abstract
We report the first synthesis of doped exfoliated graphite through the electrochemical oxidation of natural graphite in aqueous nickel nitrate and cobalt nitrate solutions, followed by heat treatment. The solutions are found to differ in electrochemical behavior during the anodic oxidation of graphite. The thermal properties of the oxidized graphite prepared by this procedure and utilized as a precursor to exfoliated graphite are described. The exfoliated graphite obtained under optimal conditions contains 2–60 wt % metal oxide and has a specific surface of 60–160 m2/g and loose density of 1.5–5 g/l.
Similar content being viewed by others
References
Wang, S.G., Zhang, Q., and Yoon, S.F., Synthesis and Characterisation of MWNTs with Narrow Diameter over Nickel Catalysts by MPCVD, Scr. Mater., 2003, vol. 48, pp. 409–413.
Abrel Rahim, M.A. and Aldel Hamed, R.M., Nickel As a Catalyst for the Electrooxidation of Methanol in Alkaline Medium, J. Power Sources, 2004, vol. 134, pp. 160–169.
Zhang, J. and Smith, K.S., CH4 Decomposition on Co Catalysts: Effect of Temperature, Dispersion, and Presence of H2 or CO in the Feed, Catal. Today, 2002, vol. 77, pp. 257–268.
Manzdi, M. and Boccuzzi, F., Characterization of Co-Based Electrocatalytic Materials for O2 Reduction in Fuel Cells, J. Power Sources, 2005, vol. 145, pp. 161–168.
Zhang, L., Cheu, X., and Zeng, Ch., Preparation and Gas Separation of Nano-sized Nickel Particle-Filled Carbon Membranes, J. Membr. Sci., 2006, vol. 281, nos. 1–2, pp. 429–434.
Sorokina, N.E., Redchitz, A.V., Ionov, S.G., and Avdeev, V.V., Different Exfoliated Graphite As a Base of Sealing Materials, J. Phys. Chem. Solids, 2006, vol. 67, pp. 1202–1204.
Sorokina, N.E., Maksimova, N.V., and Avdeev, V.V., Anodic Oxidation of Graphite in 10 to 98% HNO3, Neorg. Mater., 2001, vol. 37, no. 4, pp. 441–447 [Inorg. Mater. (Engl. Transl.), vol. 37, no. 4, pp. 360–365].
Khimicheskaya entsiklopediya (Chemical Encyclopedia), Knunyants, I.A. et al., Eds., Moscow: Sov. Entsiklopediya, 1988, vol. 3, p. 246.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © O.N. Shornikova, N.E. Sorokina, V.V. Avdeev, 2007, published in Neorganicheskie Materialy, 2007, Vol. 43, No. 9, pp. 1049–1055.
Rights and permissions
About this article
Cite this article
Shornikova, O.N., Sorokina, N.E. & Avdeev, V.V. Preparation and properties of exfoliated graphite doped with nickel and cobalt oxides. Inorg Mater 43, 938–944 (2007). https://doi.org/10.1134/S0020168507090051
Received:
Issue Date:
DOI: https://doi.org/10.1134/S0020168507090051