Selective liquid phase benzyl alcohol oxidation over Cu-loaded LaFeO3 perovskite
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Copper loaded LaMO3 (M = Mn, Fe and Co) perovskites have been synthesized by a single-step solution combustion method. These materials have been investigated for liquid phase oxidation of benzyl alcohol using tertiary butyl hydrogen peroxide (TBHP) as oxidant in air at 80 degrees C under ambient pressure. Among these, the 10 at% Cu-loaded LaFeO3 has shown the best activity i.e., similar to 99% conversion with complete benzaldehyde selectivity. The formation of perovskite phase was confirmed from XRD and the presence of Cu2+ was confirmed by XPS analysis. The higher activity of the combustion synthesized catalyst has been ascribed to the presence of a poorly defined surface structure containing an amorphous CuO phase wrapping the LaFeO3 particle, as evidenced from the HRTEM analysis. The catalyst recycling tests have shown a negligible loss of activity in the consecutive cycles.
CitacióMistri, R., Das, D., Llorca, J., Dominguez, M., Mandal, T., Mohanty, P., Ray, B.C., Gayen, A. Selective liquid phase benzyl alcohol oxidation over Cu-loaded LaFeO3 perovskite. "RSC advances", 2016, vol. 6, núm. 6, p. 4469-4477.