IR evidence shows that the oxidation of propene and toluene with dioxygen on 5% CoO-MgOsolid solution basically follows the same course as on MgO, although at much higher rate. Reaction products are acetates and formates, and benzoates respectively. EPR studies indicate that surface Co ions are able to coordinate dioxygen in a fashion close to oxygen natural carriers. Active species are superoxo radicals formed on Co ions but spilled over Mg cations. A detailed reaction scheme is proposed.
Oxidation of Propene and Toluene on CoO-MgO Solid Solutions: A Spectroscopic Study
GIAMELLO, Elio;COLUCCIA, Salvatore;SPOTO, Giuseppe;ZECCHINA, Adriano
1990-01-01
Abstract
IR evidence shows that the oxidation of propene and toluene with dioxygen on 5% CoO-MgOsolid solution basically follows the same course as on MgO, although at much higher rate. Reaction products are acetates and formates, and benzoates respectively. EPR studies indicate that surface Co ions are able to coordinate dioxygen in a fashion close to oxygen natural carriers. Active species are superoxo radicals formed on Co ions but spilled over Mg cations. A detailed reaction scheme is proposed.
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