Channels affect catalytic activity in several ways: - Accessibility: Channels provide a pathway for reactants to access the active sites. If the channels are too narrow or too long, the diffusion of reactants can be hindered, reducing the overall catalytic activity. - Diffusion: The diffusion of reactants and products through the channels is critical. Faster diffusion rates can lead to higher reaction rates. - Selectivity: Channels can be designed to preferentially allow certain molecules to pass through while excluding others. This ability can enhance the selectivity of catalytic reactions. - Stability: Properly designed channels can also contribute to the thermal and mechanical stability of the catalyst, prolonging its lifespan.
