Quantum chemistry is revolutionizing the field of catalysis by providing a deeper understanding of the molecular-level interactions that drive catalytic reactions. This computational approach allows researchers to simulate the electronic structure and properties of catalysts with high precision, helping to explain how catalysts lower the activation energy of chemical reactions and select specific reaction pathways. One of the key applications of quantum chemistry in catalysis is the study of reaction mechanisms, where it provides insights into the formation and transformation of reaction intermediates, the nature of transition states, and the energetics of chemical processes. By applying methods such as density functional theory (DFT), scientists can predict the stability and reactivity of different catalyst structures, guiding the design of more efficient catalytic materials. For instance, in the case of catalytic reactions involving metal-organic frameworks (MOFs) or single-atom catalysts, quantum chemistry can help to predict how the electronic properties of these materials will influence their reactivity and selectivity.