diffusion in catalysis

Diffusion in catalysis refers to the movement of molecules—reactants, intermediates, or products—within the catalyst’s structure or between the catalyst and its surroundings. It allows reactant molecules to reach active sites where the chemical reactions occur and enables products to leave. Effective diffusion is essential because it influences the rate at which reactions happen. If diffusion is slow, it can bottleneck the process, reducing efficiency. Conversely, good diffusion ensures reactants and products move smoothly, optimizing the catalytic process and improving overall reaction speed and performance.