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Chemistry · L4 · Homogeneous vs heterogeneous catalysis: how to tell them apart

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Decision flow for classifying a catalyst as homogeneous or heterogeneous based on its phase relative to the reactants, with esterification and catalytic-converter examples.

by @openstemUpdated Chemistry
Is the catalyst in thesame phase as the reactants?Homogeneous catalysis(e.g. H⁺(aq) in esterhydrolysis)Heterogeneous catalysis(e.g. Pt/Pd/Rh surface,Fe in the Haber process)Mixes freely at themolecular level — easy tostudy, harder to recoverfrom the product mixtureReaction happens at thecatalyst surface — easy tofilter out and reuse,limited by surface areaYes — e.g. dissolved in the same solutionNo — e.g. solid catalyst, gas or liquid reactants

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