promoter 

in catalysis
https://doi.org/10.1351/goldbook.P04876
A relatively small quantity of one or more substances, which when added to a @C00876@ improves the activity, the @S05563@, or the useful @L03515@ of the @C00876@. In general, a promoter may either augment a desired reaction or suppress an undesired one.
Source:
PAC, 1976, 46, 71. (Manual of Symbols and Terminology for Physicochemical Quantities and Units - Appendix II. Definitions, Terminology and Symbols in Colloid and Surface Chemistry. Part II: Heterogeneous Catalysis) on page 79 [Terms] [Paper]
Citation: 'promoter' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.P04876 RIS BibTex EndNote
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Last revised: February 24, 2014