HPLC can provide insights into catalytic mechanisms by: 1. Monitoring Intermediates: By separating and identifying reaction intermediates, researchers can infer the pathways through which reactants are converted to products. 2. Kinetic Studies: HPLC allows for the measurement of reaction rates by quantifying the concentration of reactants and products over time. 3. Product Distribution: It helps in determining the selectivity of catalysts by analyzing the distribution of reaction products.