Catalyst
A substance that increases reaction rate without being consumed in the process.
Definition
A catalyst is a substance that increases the rate of a chemical reaction by providing an alternative reaction pathway with a lower activation energy, while itself remaining unchanged at the end of the reaction. Catalysts do not alter the thermodynamics of the reaction or the position of equilibrium. They are essential in industrial chemistry, biological systems (enzymes), and environmental applications such as catalytic converters.
Example
“The catalytic converter in a car's exhaust system uses platinum and palladium catalysts to convert toxic carbon monoxide and nitrogen oxides into harmless carbon dioxide and nitrogen gas.”
Usage Examples
- 1
“The team applied catalyst best practices to improve their chemistry outcomes significantly.”
- 2
“Understanding catalyst is essential for anyone building a career in STEM.”
When & How to Use
Use 'Catalyst' when working in Chemistry contexts where a catalyst is a substance that increases the rate of a chemical reaction by providing an alternative reaction pathway with a lower activation energy, while itself remaining unchanged at the end of the reaction.
- ▸Applying catalyst principles during a chemistry project or initiative
- ▸Explaining catalyst to a junior team member or stakeholder unfamiliar with STEM
- ▸Evaluating options or proposals using catalyst as a decision-making criterion
Etymology & Origin
The term 'Catalyst' derives from professional usage and entered STEM professional usage as the field formalised in the 20th century.
History & Evolution
The concept of catalyst has evolved alongside STEM. Early practitioners relied on informal methods; structured approaches emerged with the professionalisation of chemistry in the mid-20th century. Today, catalyst is a standard part of STEM practice globally.
Synonyms
- reaction accelerator
- catalytic agent
- enzymatic catalyst
Antonyms / Opposites
- inhibitor
- reaction inhibitor
Images
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Related Terms
- Activation Energy
- Enzyme
- Reaction Rate
- Chemical Equilibrium