Kinetics of oxygen reduction by nanocomposite silver-ion exchanger
Abstract
It was experimentally determined that the rate of reduction of molecular oxygen from water by the nanocomposite silver-ion exchanger KU-23 is substantially lower than by copper-containing composite and takes place with substantial kinetic inhibition. The kinetic parameters of the process were determined by solving the reverse kinetic problem; it was found that this was due to a reduction in the rate constant of the reaction of silver with oxygen at virtually constant internal diffusion coefficient of molecular oxygen. The transition from kinetic to diffusion control was determined to depend on the silver particle size.
- Publication:
-
Russian Journal of Physical Chemistry A
- Pub Date:
- July 2011
- DOI:
- 10.1134/S0036024411070181
- Bibcode:
- 2011RJPCA..85.1196K
- Keywords:
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- nanocomposite;
- ion exchanger KU-23;
- macrokinetics of reduction;
- molecular oxygen