Catalyst

Mechanism of Enzyme Catalysis The substance on which the enzyme acts is called the substrate. The enzyme molecule is a protein chain that acquires a…

Characteristic Properties of Enzyme Catalysis Enzymes have a number of characteristic properties that make them efficient and specific catalysts for many biological reactions. Enzyme catalysis…

Enzyme Catalysis Many chemical reactions associated with living organisms are accelerated by a group of closely related substances called enzymes. Enzymes play a dominant role…

Mechanism of Acid-Base Catalysis The addition of proton or its removal must be associated with acid-base catalysis; this is because for most cases an acid…

Acid-Base Catalysis Many organic reactions in solution are known to be catalyzed by acids or bases or both. These reactions form an important class of…

Catalytic Hydrogenation of Ethylene The five steps are illustrated in figure for the catalytic hydrogenation of ethylene to form ethane using finely divided nickel catalyst.…

Experiment Explanation by Catalytic Adsorption Theory The adsorption theory satisfactorily explains the following: (i) The specific nature of the catalyst and the change in the…

The role of promoters in Catalyst Adsorption A small quantity of promoter is sufficient to increase the activity of the catalyst to a large extent.…

Intermediate compound theory: This theory was proposed by Clement and Desormes in 1806. The essential feature of the theory is that the catalyst chemically combines…

Adsorption theory: This theory can be applied to heterogeneous catalysis only. As the name suggests the reactant is adsorbed on the surface of the catalyst…