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

Claim 0:
1. A catalyst system comprising:
a platinum group metal catalyst bound to a metal oxide support, the metal oxide support defined by a plurality of particles having an average particle diameter greater than or equal to about 0.8 micrometers to less than or equal to about 5 micrometers, 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, the metal oxide support comprising aluminum oxide (Al2O3); and
a crystalline coating of metal oxide nanoparticles that comprise aluminum oxide (Al2O3) disposed on the metal oxide support around the platinum group metal catalyst, 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.