Kinetics of redox dissolution of soft-centre particles

A model is developed which describes the kinetics of redox dissolution of a powder comprising soft-centre particles, i.e. particles with a comparatively inert, outer layer and a more reactive, inner core. The model is then used to interpret the non-simple cubic rate law kinetics exhibited in the oxidative dissolution of partially dehydrated samples of ruthenium dioxide hydrate by bromate ions under acidic conditions.