The catalytic activity of semiconducting transition metal oxides varies with the addition of dopants. To deconvolute the chemical and electronic effects of dopants and to control the electronic effects with precision, models are needed that relate the Fermi level position to reaction rate. The present work develops such a model for oxides of transition metals in groups IV, V, and VI of the periodic table whose cations have a d0 configuration. The model employs a series of semiempirical relations that connect the surface Fermi level of the solid to its activity through the point of zero charge and overall Hammett acidity. The effects of successful p-doping on reaction rate are predicted to be quite large, especially for reactions exhibiting strong ionicity.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films