How Does Thermal Annealing Affect Catalyst Properties?
The impact of thermal annealing on catalyst properties can be multifaceted:
Particle Size: Thermal annealing can cause sintering of nanoparticles, leading to an increase in particle size. While larger particles might reduce the active surface area, they can also improve stability. Surface Composition: Through annealing, it is possible to redistribute elements on the catalyst surface, which can enhance active site availability and catalytic performance. Phase Transformation: Certain catalysts undergo phase changes at elevated temperatures, which can either be beneficial or detrimental depending on the desired catalytic properties. Defect Healing: Annealing can help in healing defects in the crystal lattice, thereby improving the structural integrity and performance of the catalyst.
