Abstract

Correlations between reaction rates and selectivities vs. Egap (eV) of the semiconducting oxides Co3O4, CuO, NiO, Cr2O3, α-Fe2O3, TiO2 and MoO3 were obtained for the catalytic air oxidation of methanol at 573 K. Higher and lower selectivities to formaldehyde for Egap>2 n-type, and Egap >2 p-type semiconducting oxides, are observed, respectively.

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