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| con·tact cat·a·lyst (plural con·tact cat·a·lysts) |
noun |
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| Definition: |
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solid that adsorbs molecules: a solid that adsorbs molecules of gas or liquid onto its surface where the molecules react together. For example, the finely divided platinum in a catalytic converter acts as a contact catalyst for carbon monoxide and oxygen in exhaust fumes, which react to form carbon dioxide.
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