Exhaust gas purification catalyst
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United States of America Patent
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Jun 2, 2020
Grant Date -
Oct 19, 2017
app pub date -
Oct 2, 2015
filing date -
Oct 2, 2014
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Abstract
An exhaust gas purification catalyst is provided for which a purification performance is excellent and particle growth of a catalyst metal is suppressed. The exhaust gas purification catalyst is provided with a substrate and a catalyst layer formed on the substrate. The catalyst layer contains a catalyst metal that functions as an oxidation and/or reduction catalyst and contains a support that supports the catalyst metal. The support is constituted of a porous ceramic that, in its volumetric pore diameter distribution measured based on a nitrogen gas adsorption method, has a pore diameter P10 corresponding to a cumulative 10% from a small pore side and a pore diameter P90 corresponding to a cumulative 90% from the small pore side that are both in a range from 5 to 50 nm.
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