catalyst

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cat·a·lyst

 (kăt′l-ĭst)
n.
1. Chemistry A substance, usually used in small amounts relative to the reactants, that modifies and increases the rate of a reaction without being consumed in the process.
2. One that precipitates a process or event, especially without being involved in or changed by the consequences: "A free press ... has remained ... a vital catalyst to an informed and responsible electorate" (Robert O'Neal).

[From catalysis.]

catalyst

(ˈkætəlɪst)
n
1. (Chemistry) a substance that increases the rate of a chemical reaction without itself suffering any permanent chemical change. Compare inhibitor2
2. a person or thing that causes a change

cat•a•lyst

(ˈkæt l ɪst)

n.
1. a substance that causes or speeds a chemical reaction without itself being affected.
2. a person or thing that precipitates an event or change.
[1900–05; cataly (sis) + (-i) st]

cat·a·lyst

(kăt′l-ĭst)
A substance that starts or speeds up a chemical reaction while undergoing no permanent change itself. The enzymes in saliva, for example, are catalysts in digestion.

catalyze verb

catalyst

A substance which alters the rate of a chemical reaction. It takes part in the reaction but remains chemically unchanged by it.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.catalyst - (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affectedcatalyst - (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
activator - (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription
biocatalyst - a biochemical catalyst such as an enzyme
enzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
platinum black - a fine black powder of platinum; used as a catalyst in chemical reactions
anticatalyst - (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst
2.catalyst - something that causes an important event to happen; "the invasion acted as a catalyst to unite the country"
causal agency, causal agent, cause - any entity that produces an effect or is responsible for events or results

catalyst

noun
An agent that stimulates or precipitates a reaction, development, or change:
Translations
حَفّاز، مُحَفِّزمادَّةٌ حَفّازَه
katalyzátor
drivkraftigangsætterkatalysator
katalysaattorikatalyytti
hvatamaîur, hvatihvati
kas pagreitina permainaskatalizatoriuskatalizuojantis
katalizators
katalyzátor
katalizörnedensebep

catalyst

[ˈkætəlɪst] N (Chem, fig) → catalizador m

catalyst

[ˈkætəlɪst] n
(= person, event) → catalyseur m
to act as a catalyst → servir de catalyseur
(CHEMISTRY)catalyseur m

catalyst

n (lit, fig)Katalysator m

catalyst

[ˈkætəlɪst] n (all senses) → catalizzatore m

catalyst

(kӕtəlist) noun
1. a substance which causes or assists a chemical change in another substance without itself undergoing any permanent chemical change.
2. someone or something that helps bring about a change.
ˌcataˈlytic adjective

cat·a·lyst

a. catalítico-a, agente estimulante de una reacción química sin afectarla.
References in periodicals archive ?
However homogeneous catalyst systems are potentially disadvantageous in the regard that the homogeneous catalysts are associated with the problem of separation and reusability.
One novel preparation of the redox couple Co(III)/Co(II), had earlier been indicated as a potential homogeneous catalyst for a route from hydrocarbons (a narrow saturate cut of gas oil) to hydroperoxides that are important constituents for polymerization and oxidation processes [17, 19].
Besides that, the major part of biolubricant manufacturing from the fossil fuel using homogeneous catalyst which also polluted the environment, difficulty separation and high cost, thus this work aims is to overcome these issues by using Paphiaundulata shell waste and Trimetylolpropane (TMP) as chemical modification for Jatropha curcas oil conversion to biolubricant.
Its partner will help Novomer prove its technology and confirm that the lab-scale catalyst selectivity of 99+% is achievable on a large scale, as well as demonstrate that the homogeneous catalyst can be effectively recycled.
Among their topics are principles of atom economy and some examples, microwave-accelerated homogeneous catalysis in water, the immobilization and compartmentalization of homogeneous catalysts, hydrogenation for forming carbon-carbon bonds, organocatalysts, and homogeneous catalyst design for synthesizing aliphatic polycarbonates and polyesters.
Since Karstedt-type was a liquid, homogeneous catalyst and Pt/C was a heterogeneous one, the former exhibited a shorter inducing period and more effective action for obvious reasons.
In our study comparing the oxidation of xylose and arabinose by V (V) in the presence of Mn (II) chloride as homogeneous catalyst, the entropy of activation was negative; this suggests the reaction proceeds through a hydride transfer process for complex formation.
Summary: TEHRAN (FNA)- Chemists developed the most potent homogeneous catalyst known for water oxidation, considered a crucial component for generating clean hydrogen fuel using only water and sunlight.