How Does Molecular Size Affect Catalytic Activity?
Molecular size affects catalytic activity in several ways. Larger molecules may have restricted access to the active sites of a catalyst, particularly in heterogeneous catalysis where the active sites are often located in pores or on the surface of the catalyst. This can lead to lower reaction rates due to diffusion limitations. Conversely, smaller molecules can more easily access these active sites, potentially leading to higher catalytic activity.
