Thermal stability and properties of Pd/CeAlO3 catalyst prepared by combustion synthesis

Synthesis and properties of cerium aluminate catalyst were investigated. The catalyst was prepared via combustion synthesis involving aluminum and cerium nitrates and glycine in the presence of palladium chloride. The obtained material was investigated using X-ray diffraction, Fourier transformed infra-red spectroscopy, differential thermal and thermo-gravimetric analysis, N-2 adsorption, Raman spectroscopy, scanning electron microscopy, energy dispersion X-ray spectroscopy and X-ray photoelectron spectroscopy. Catalytic activity was tested for the toluene oxidation process. The direct product of combustion synthesis was CeAlO3 which remained stable even after thermal treatment at 400 degrees C for 2 h in static air, while temperature treatment at 800 degrees C for 2 h resulted in the decomposition of CeAlO3 into CeO2 and gamma-Al2O3. Both thermal treatment products had sponge-like microstructure, but relatively small specific surface areas. Nevertheless, CeO2 prepared at 800 degrees C was nanocrystalline. Palladium was present as oxide homogeneously dispersed throughout the catalyst. The prepared catalyst proved to be highly active for the toluene oxidation process.

Automated summary

This study investigates the synthesis and properties of cerium aluminate catalyst. The catalyst is prepared through combustion synthesis involving aluminum and cerium nitrates and glycine in the presence of palladium chloride. The obtained material is characterized using various techniques, and it is found to exhibit high catalytic activity for the toluene oxidation process.