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Catalyst (Noun)

(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected.

Nouns denoting substances.

The platinum foil served as a catalyst in the laboratory experiment, speeding up the hydrogenation reaction without being altered.
In chemical plants, nickel is often used as a catalyst to facilitate the conversion of nitrogen into ammonia.
The addition of the enzyme catalyst significantly accelerated the breakdown of proteins in the digestive system.
V2O5 is commonly employed as a catalyst in the production of sulfuric acid through the contact process.
The chemist discovered a new compound that acted as a potent catalyst, enabling the creation of a valuable new polymer.

Something that causes an important event to happen; "the invasion acted as a catalyst to unite the country".

Nouns denoting people.

The discovery of oil in the region acted as a catalyst for economic growth and development.
A major scandal served as a catalyst for the passage of stricter government regulations.
The popular protest movement was the catalyst that brought about significant changes in the government.
The loss of her mother was a catalyst for her decision to pursue a career in healthcare.
The new invention was the catalyst that transformed the manufacturing industry in the early 20th century.