OXIDATIVE DISSOLUTION OF RUTHENIUM DIOXIDE HYDRATE BY PERIODATE IONS
Data(s) |
1992
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Resumo |
The results of a kinetic study of the oxidative dissolution of ruthenium dioxide hydrate to ruthenium tetroxide by periodate ions, IO4-, in acidic solution are described. The kinetics of dissolution give a good fit to a 'soft-centre' model in which the particles of RuO2.xH2O are assumed to be monodispersed, spherical but inhomogeneous in composition, comprising a difficult-to-corrode outer shell and a more easy-to-corrode inner core. In this work metaperiodate appears to act as a two-electron oxidant. The observed kinetics fit a reaction scheme in which the rate-determining step is the reaction between a surface site and an adsorbed IO4 ion and there is competitive adsorption by any IO3- present. In the absence and presence of an excess of IO3- ions, the overall activation energy for the corrosion reaction was determined to be 38 +/- 2 and 54 +/- 4 kJ mol-1, respectively. |
Identificador | |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Mills , A & Sawunyama , P 1992 , ' OXIDATIVE DISSOLUTION OF RUTHENIUM DIOXIDE HYDRATE BY PERIODATE IONS ' JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS , vol 88 , pp. 2487-2491 . |
Tipo |
article |