EXHAUST GAS PURIFICATION CATALYST, METHOD OF PRODUCING THE SAME, AND EXHAUST GAS PURIFICATION METHOD USING THE SAME

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EP 2 952 246 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A1)

(48)	Corrigendum issued on:
	17.02.2016 Bulletin 2016/07

(43)	Date of publication:
	09.12.2015 Bulletin 2015/50

(21)	Application number: 15170097.8

(22)	Date of filing: 01.06.2015

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International Patent Classification (IPC):

B01D 53/94^(2006.01)
B01J 37/08^(2006.01)
B01J 23/42^(2006.01)
B01J 35/02^(2006.01)

B01J 37/02^(2006.01)
B01J 21/12^(2006.01)
B01J 23/44^(2006.01)
F01N 3/10^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME
	Designated Validation States:
	MA

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Priority:

02.06.2014 JP 2014114235

(71)	Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
	Toyota-shi, Aichi-ken, 471-8571 (JP)

(72)	Inventors:
	HIROSE, Takuto Nagakute-shi, Aichi-ken, 480-1192 (JP) YAMAZAKI, Kiyoshi Nagakute-shi, Aichi-ken, 480-1192 (JP) SOBUE, Yuichi Aichi-ken, 471-8571 (JP) SHINMYO, Yusuke Aichi-ken, 471-8571 (JP)

(74)	Representative: Kuhnen & Wacker
	Patent- und Rechtsanwaltsbüro Prinz-Ludwig-Straße 40A 85354 Freising 85354 Freising (DE)

(54)	EXHAUST GAS PURIFICATION CATALYST, METHOD OF PRODUCING THE SAME, AND EXHAUST GAS PURIFICATION METHOD USING THE SAME

(57) An exhaust gas purification catalyst includes an alumina support, a silica layer, and active metal particles. The silica layer is formed on a surface of the alumina support. The active metal particles are formed of platinum and palladium, the platinum and the palladium being supported on the silica layer. A ratio of fine particles having a particle size of 2.0 nm or less to all the active metal particles is 50% or higher in terms of the number of particles, the fine particles being included in the active metal particles. A ratio of fine alloy particles having a palladium content ratio of 10 at% to 90 at% to all the fine particles is 50% or higher in terms of the number of particles, the fine alloy particles being included in the fine particles.