Synergistic interaction and mechanistic evaluation of NO oxidation catalysis on Pt/Fe2O3 cubes

Supported platinum particles with the help of strong metal-support interaction (SMSI) could boost catalytic performance. Pt/Fe2O3 cubes were synthesized by in situ reductions precursors over Fe2O3 cubes, tested for oxidation NO, and further characterized different techniques. The tests showed that exhibited a dramatically enhanced activity NO comparison to Pt/SiO2, physical mixture suggesting synergistic between Pt cubes. not only triggered generation surface oxygen vacancy sites on but also increased amount chemically adsorbed O2 at sites. rigorous kinetic study described specific reaction pathway following Langmuir-Hinshelwood mechanism dissociation O2* O* assisted NO* was recognized as rate-determining step oxidation, which might be promoted spillover from supporting In diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirmed abundant nitrates formed suggested NO2 nitrate species.