EXHAUST GAS CONTROL CATALYST
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United States of America Patent
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Oct 6, 2016
app pub date -
Nov 10, 2014
filing date -
Nov 10, 2014
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Provided is an exhaust gas control catalyst in which a catalyst layer containing at least one of Pd and Pt is formed on a substrate (1), the exhaust gas control catalyst including a first OSC material having a pyrochlore structure and an OSC material whose oxygen storage rate is faster than that of the first OSC material having a pyrochlore structure in a catalyst layer front stage (21) which is in a range from an exhaust gas upstream end of the catalyst layer to a length position which is 50% or lower of a total length of the catalyst layer.
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