Increased Surface Area: Physical activation techniques like thermal treatment and mechanical milling significantly increase the surface area of the catalyst, providing more active sites for reactions. Enhanced Porosity: Methods like thermal activation create a more porous structure, allowing better diffusion of reactants and products. Improved Stability: Physically activated catalysts often exhibit greater thermal and mechanical stability, making them suitable for harsh reaction conditions. Environmentally Friendly: Physical activation processes typically involve fewer chemicals, making them more environmentally friendly compared to chemical activation methods.