Patent ID: 11951465
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 7:
8. A catalyst system comprising:
a platinum group metal catalyst selected from the group consisting of: palladium, platinum, and combinations thereof bound to a metal oxide support comprising aluminum oxide (Al2O3) and defined by a plurality of particles having an average diameter greater than or equal to about 0.8 micrometers to less than or equal to about 5 micrometers, and a surface area of the metal oxide support being greater than or equal to about 50 m2/g to less than or equal to about 150 m2/g; and
a crystalline coating of metal oxide nanoparticles the comprise aluminum oxide (Al2O3) distributed around the platinum group metal catalyst on the metal oxide, wherein the crystalline coating has a porosity of greater than about 20% to less than about 70% and covers greater than or equal to about 1.5% to less than or equal to about 80% of an exposed surface area of the metal oxide support.