What are some examples of catalysts in everyday life? There are many catalysts that have important biological, commercial, and industrial applications. Enzymes are biological catalysts involved in a variety of vital processes in living organisms, including digestion. Other examples include the use of nickel to hydrogenate vegetable oils into margarine; the use of platinum in catalytic converters to covert carbon monoxide into carbon dioxide in cars. What is a catalyst and how does it work? A catalyst is a substance that can speed up a reaction, without being consumed in the process. They work by lowering the activation energy required for a reaction, by forming temporary, weak bonds with the reactant molecules. By the end of the reaction, however, these bonds are lost and the catalyst returns to its original state, which is why no net change occurs to the catalyst.
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