Parkkima, Outi, Silvestre Albero, Ana, Silvestre-Albero, Joaquín, Karppinen, Maarit
Oxygen-Nonstoichiometric YBaCo4O7+δ as a Catalyst in H2O2 Oxidation of Cyclohexene
Catalysis Letters. 2015, 145(2): 576-582. doi:10.1007/s10562-014-1408-0
URI: http://hdl.handle.net/10045/57824
DOI: 10.1007/s10562-014-1408-0
ISSN: 1011-372X (Print)
Abstract: 
Here we present oxygen-nonstoichiometric transition metal oxides as highly prominent candidates to catalyze the industrially important oxidation reactions of hydrocarbons when hydrogen peroxide is employed as an environmentally benign oxidant. The proof-of-concept data are revealed for the complex cobalt oxide, YBaCo4O7+δ (0 < δ < 1.5), in the oxidation process of cyclohexene. In the 2-h reaction experiments YBaCo4O7+δ was found to be significantly more active (>60 % conversion) than the commercial TiO2 catalyst (<20 %) even though its surface area was less than one tenth of that of TiO2. In the 7-h experiments with YBaCo4O7+δ, 100 % conversion of cyclohexene was achieved. Immersion calorimetry measurements showed that the high catalytic activity may be ascribed to the exceptional ability of YBaCo4O7+δ to dissociate H2O2 and release active oxygen to the oxidation reaction.
Keywords:Nonstoichiometric oxide, Catalyst, Hydrocarbon oxidation, H2O2 oxidant
Springer Science+Business Media New York
info:eu-repo/semantics/article