polyfunctional heterogeneous catalysis

Polyfunctional heterogeneous catalysis involves catalysts with multiple active sites on their surface, enabling them to facilitate complex chemical reactions. These catalysts are crucial in processes like hydrocarbon interconversions, where both metal and acidic sites work in tandem. For instance, a platinum or nickel catalyst on a silica-alumina base can catalyze reactions involving saturated and unsaturated hydrocarbons, as well as branched and straight-chain isomers.1

Heterogeneous reactions occur when reactants are in different phases, such as a solid catalyst interacting with gas or liquid reactants. This is distinct from homogeneous catalysis, where the catalyst and reactants are in the same phase. Polyfunctional catalysts are essential for efficiently driving reactions that require multiple steps or different types of chemical activation.231