Abstract
The object of this work was investigate of electrochemical kinetics of hydrogen oxidation on the nanodispersed diamond in solutions of sulphuric acid, sodium chloride and sodium hydroxide in the temperature range 20–60°C.
The initial nanodispersed diamond powders of ASUDCh have been selected as subject of investigations. It has been ascertained that values of exchange current density of hydrogen oxidation reach maximum on heat-treated diamond in sulfuric solutions, whereas these values reach minimum in solutions of sodium chloride. Value i0 depends on concentration of solution. It has been shown that optimal concentration is 1.0 N. It has been ascertained that carrying out of two-stage thermal treating results in decreasing of activation energy nearly by two times.
The water quantity, which desorbed by diamond after heat-treated presipication in hydrogen, increases in three times. The increase of quantity waters confirms about significant increase adsorbing activity of a diamond surface. It has been shown that heat-treated presipication in hydrogen forms on diamond surface the amorphous-like carbon phase promotional to chemical dissociation of molecular hydrogen.
The special heat-treated processing in hydrogen allowed us create effective catalysts for hydrogen electrodes.
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Bogatyreva, G.P., Marinich, M.A., Bazaliy, G.A. (2008). Studies of Electrochemical Kinetics of Hydrogen Oxidation on the Nanodispersed Diamond. In: Baranowski, B., Zaginaichenko, S.Y., Schur, D.V., Skorokhod, V.V., Veziroglu, A. (eds) Carbon Nanomaterials in Clean Energy Hydrogen Systems. NATO Science for Peace and Security Series C: Environmental Security. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-8898-8_40
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DOI: https://doi.org/10.1007/978-1-4020-8898-8_40
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