Catalyst | Examples, Definition, & Facts | Britannica
2024年8月26日 · Catalyst, in chemistry, any substance that increases the rate of a reaction without itself being consumed. Enzymes are naturally occurring catalysts responsible for many essential biochemical reactions. In general, catalytic action is a chemical reaction between the catalyst and a reactant.
What Is a Catalyst? Understand Catalysis - Science Notes and ...
2022年9月21日 · In chemistry and biology, a catalyst is a substance the increases the rate of a chemical reaction without being consumed by it. Catalysis is the process of speeding up a reaction using a catalyst. The word “catalyst” comes from the Greek word kataluein, which means to loosen or untie.
Catalyst Definition & Meaning - Merriam-Webster
The meaning of CATALYST is a substance that enables a chemical reaction to proceed at a usually faster rate or under different conditions (as at a lower temperature) than otherwise possible. How to use catalyst in a sentence.
Explainer: What is a catalyst? - Science News Explores
2017年2月27日 · A catalyst is some material that speeds up chemical reactions. With a helping hand from a catalyst, molecules that might take years to interact can now do so in seconds. Factories rely on catalysts to make everything from plastic to drugs. Catalysts help process petroleum and coal into liquid fuels.
Science Made Simple: What Are Catalysts? - SciTechDaily
2021年5月18日 · A catalyst is a substance that speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction. Catalysis is the process of adding a catalyst to facilitate a reaction.
14.7: Catalysis - Chemistry LibreTexts
Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. A catalyst, therefore, does not appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction.
CATALYST | definition in the Cambridge English Dictionary
catalyst. noun [ C ] us / ˈkæt̬· ə l·ɪst /. Add to word list. a condition, event, or person that is the cause of an important change. biology, chemistry. A catalyst is also a substance that …