[header] How to study the use of catalysts in chemistry [title] Define the process. [step] Catalysis of chemical reactions refers to a process in which an external chemical agent is used in order to speed up a chemical process which is typically a chemical transformation or a chemical reaction. Catalysts that are known in the chemical literature are of several types. 
All of them have the same role and purpose which is the acceleration of chemical processes. Chemical catalysts usually enhance the rate of chemical reactions by lowering its energy barrier or activation energy of the chemical reaction.