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 language | English |
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| Pages (from-to) | 2939-2944 |
| Number of pages | 6 |
| Journal | JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS |
| Volume | 90 |
| Publication status | Published - 1994 |