US 12,083,503 B2
Supported oxide NH3-SCR catalysts with dual site surface species and synthesis processes
Phuc Hai Nguyen, Brussels (BE); Marc-Olivier Charlin, Sainte-Sigolene (FR); Cherif Larabi, Villeurbanne (FR); Kai Chung Szeto, Villeurbanne (FR); and Mostafa Taoufik, Villeurbanne (FR)
Assigned to TOYOTA MOTOR EUROPE, Brussels (BE); CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR); UNIVERSITE CLAUDE BERNARD LYON 1, Villeurbanne (FR); and ECOLE SUPERIEURE DE CHIMIE PHYSIQUE ELECTRONIQUE DE LYON, Villeurbanne (FR)
Appl. No. 17/616,824
Filed by TOYOTA MOTOR EUROPE, Brussels (BE); CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR); UNIVERSITE CLAUDE BERNARD LYON 1, Villeurbanne (FR); and ECOLE SUPERIEURE DE CHIMIE PHYSIQUE ELECTRONIQUE DE LYON, Villeurbanne (FR)
PCT Filed Jun. 4, 2019, PCT No. PCT/IB2019/000711
§ 371(c)(1), (2) Date Dec. 6, 2021,
PCT Pub. No. WO2020/245621, PCT Pub. Date Dec. 10, 2020.
Prior Publication US 2022/0305464 A1, Sep. 29, 2022
Int. Cl. B01J 23/10 (2006.01); B01D 53/94 (2006.01); B01J 23/30 (2006.01); B01J 37/02 (2006.01); B01J 37/08 (2006.01); C07F 11/00 (2006.01)
CPC B01J 23/30 (2013.01) [B01D 53/9418 (2013.01); B01J 23/10 (2013.01); B01J 37/0217 (2013.01); B01J 37/0219 (2013.01); B01J 37/0228 (2013.01); B01J 37/086 (2013.01); C07F 11/005 (2013.01); B01D 2255/20776 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A process for preparing a catalyst material, comprising the steps of:
(a) providing a support material having surface hydroxyl (OH) groups, wherein the support material is ceria (CeO2), zirconia (ZrO2) or a combination of thereof;
(b) reacting the support material having surface hydroxyl (OH) groups of step (a) with a precursor selected from the group consisting of [(tBuCH2)3W═O]2(μ-O); [tBuO3W═O]2(μ-O); (tBuO)3W≡W(tBuO)3;
(c) calcining the product obtained in step (b) in order to provide a catalyst material showing dual site surface species containing pairs of transition metal atoms derived from the precursor that are present in oxide form on the support material.