Platinum catalyst deactivation during aqueous alcohol oxidation is discussed, using the selective oxidation of methyl a- -glucopyranoside as an example. The most important causes of platinum deactivation are catalyst over-oxidation and catalyst poisoning. Deactivation by over-oxidation can be reversed by applying a redox-cycle, i.e. cyclic exposure to oxidative and reductive circumstances. A kinetic model for methyl a- -glucopyranoside oxidation, platinum deactivation, and reactivation, based on electrochemistry is presented and implemented into a three-phase stirred slurry reactor model, showing the advantages of applying redox cycles.
Markusse, A. P., Kuster, B. F. M., & Schouten, J. C. (2001). Platinum catalysed aqueous methyl alpha-D-glucopyranoside oxidation in a multiphase redox-cycle reactor. Catalysis Today, 66(2-4), 191-197. https://doi.org/10.1016/S0920-5861(00)00648-9