KINETICS OF REDUCTIVE DISSOLUTION OF SODIUM BISMUTHATE BY CE-III AND MN-II IONS

Andrew Mills, X.J. Li

Research output: Contribution to journalArticlepeer-review

Abstract

The kinetics of reductive dissolution of NaBiO3, by Mn-II and Ce-III ions are studied as a function of [Mn-II] or [Ce-III], [Bi-III], [H+] and temperature. They fit a simple inverse-cubic rate law and can be readily interpreted using a mechanism in which the rate-determining step is the reaction between an adsorbed reducing species (i.e. a Mn-II or Ce-III ion) and its associated surface site; protonation of the surface site promotes the rate of reaction. The rate of dissolution decreases with increasing initial concentration of Bi-III ions owing to competitive inhibition by the latter species. A kinetic model, based on this mechanism, is applied and provides a quantitative description of the observed kinetics.
Original languageEnglish
Pages (from-to)2939-2944
Number of pages6
JournalJOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS
Volume90
Publication statusPublished - 1994

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