Complete benzene oxidation over mono and bimetallic Au–Pd catalysts supported on Fe-modified ceria

• Fe-doped ceria, prepared by two different methods was used as support.
• Complete benzene oxidation over Au, Pd and Pd–Au catalysts was studied.
• Strong effect of preparation method on activity of Au-based catalysts was observed.
• Fe-doped ceria prepared by impregnation is a beneficial support for Pd–Au catalyst.

Mono-(Au, Pd) and bimetallic Au–Pd catalysts supported on Fe-modified ceria were synthesized and characterized by XRD, TEM, XPS, and TPR techniques. The effect of support preparation (impregnation or mechanochemical mixing) on the structural, electronic, reductive and catalytic properties of the catalysts for complete benzene oxidation was investigated. The best catalytic performance and the positive role of Pd deposition on already deposited gold was observed over bimetallic catalyst supported on prepared by impregnation Fe–Ce support. Complete conversion of benzene was achieved over the most active bimetallic catalyst at 200 °C. During the 24 h stability test at 200 °C the activity remained constant.

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