Thin‐film β‐MoO3 Supported on α‐Fe2O3 as a Shell–Core Catalyst for the Selective Oxidation of Methanol to Formaldehyde

β‐MoO3/α‐Fe2O3 catalysts synthesized by chemical vapor deposition exhibit a uniform shell–core structure. The structure of the metastable β‐MoO3 film is retained even after calcination in air at 873 K, owing to strong Mo_O_Fe links at the interface. The shell–core β‐MoO3/α‐Fe2O3 catalysts are much more active than, and comparably selective to, the reference α‐MoO3 catalyst in the selective oxidation of methanol to formaldehyde.Fil: Shir, Guojun. Ruhr University Bochum; AlemaniaFil: Franzke, Thomas. Ruhr University Bochum; AlemaniaFil: Sanchez, Miguel Dario. Universidad Nacional del Sur. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina. Ruhr University Bochum; AlemaniaFil: Xia, Wei. Ruhr University Bochum; AlemaniaFil: Weis, Frederik. Karlsruhe Institute Of Technology; AlemaniaFil: Seipenbusch, Martin. Karlsruhe Institute Of Technology; AlemaniaFil: Kasper, Gerhard. Karlsruhe Institute Of Technology; Alemania. Ruhr University Bochum; AlemaniaFil: Muhler, Martin. Ruhr University Bochum; Alemani