Catalyst

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Catalyst Meaning and Definition in Dictionary

Definitions from Wordnet 2.0


  • something that causes an important event to happen; "the invasion acted as a catalyst to unite the country"
  • (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected

Definitions from Wiktionary


  • (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected ,
  • something that causes an important event to happen; "the invasion acted as a catalyst to unite the country"

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Catalyst Meaning and Definition in Wikipedia


Catalysis is the change in speed (rate) of a chemical reaction due to the help of a catalyst. Unlike other chemicals which take part in the reaction, a catalyst is not consumed by the reaction itself. A catalyst may participate in many chemical reactions. Catalysts that speed the reaction are called positive catalysts. Catalysts that slow the reaction are called negative catalysts, or inhibitors. Substances that increase the activity of catalysts are called promoters, and substances that deactivate catalysts are called catalytic poisons.

A catalyst is something which changes the rate of a chemical reaction. An example is when manganese oxide (MnO2) is added to hydrogen peroxide (H2O2), and the hydrogen peroxide starts to break up into water and oxygen. Catalysts are either of natural or synthetic origin. Catalysts are useful because they leave no residue in the solution they have speeded up. A catalyst can also be used in a reaction again and again as it is not used up. There are many catalysts in our body which play an important part in many biochemical reactions. These are called enzymes. Most catalysts work by lowering the 'activation energy' of a reaction. This allows less energy to be used, thus speeding up the reaction. The opposite of a catalyst is an inhibitor. Inhibitors slow down reactions. Some of them are found in snake venom and are dangerous for our nervous system or heart.


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Catalyst Sample Sentences in News


  • Catalyst Copper Announces Closing of Non-Brokered Private Placement and Appointment of Officers
    Catalyst Copper Announces Closing of Non-Brokered Private Placement and Appointment of Officers Read more on this news related to 'Catalyst'
  • CCG Catalyst Hires Gren Blackall as Practice Director and Senior Consultant
    CCG Catalyst, a bank consulting firm providing strategic direction for banks, has named Gren Blackall as practice director and senior consultant. Read more on this news related to 'Catalyst'
  • ChannelAdvisor Announces Catalyst Europe 2015
    ChannelAdvisor Corporation , a leading provider of cloud-based e-commerce solutions that enable retailers and manufacturers to increase global sales, today announced that its Catalyst Europe 2015 conference will take place on 23 April 2015 at the Hilton London Metropole Hotel. Read more on this news related to 'Catalyst'

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