US 12,227,428 B2
Nanocrystal-sized cerium-zirconium-aluminum oxide material and method of making the same
Anatoly Bortun, Ypsilanti, MI (US); Jin Cho, Utsunomiya (JP); Yunkui Li, Ann Arbor, MI (US); David Shepard, Canton, MI (US); and Mila Bortun, Ypsilanti, MI (US)
Assigned to Pacific Industrial Development Corporation, Ann Arbor, MI (US)
Appl. No. 17/422,770
Filed by Pacific Industrial Development Corporation, Ann Arbor, MI (US)
PCT Filed Dec. 19, 2019, PCT No. PCT/US2019/067315
§ 371(c)(1), (2) Date Jul. 14, 2021,
PCT Pub. No. WO2020/159641, PCT Pub. Date Aug. 6, 2020.
Claims priority of provisional application 62/798,062, filed on Jan. 29, 2019.
Prior Publication US 2022/0064017 A1, Mar. 3, 2022
Int. Cl. C01G 25/00 (2006.01); B01D 53/94 (2006.01); F01N 3/022 (2006.01); F01N 3/10 (2006.01); F01N 3/28 (2006.01)
CPC C01G 25/006 (2013.01) [B01D 53/945 (2013.01); F01N 3/022 (2013.01); F01N 3/101 (2013.01); F01N 3/2803 (2013.01); B01D 2255/2061 (2013.01); B01D 2255/2063 (2013.01); B01D 2255/2065 (2013.01); B01D 2255/2066 (2013.01); B01D 2255/20715 (2013.01); B01D 2255/2092 (2013.01); B01D 2255/407 (2013.01); B01D 2255/908 (2013.01); B01D 2255/9202 (2013.01); B01D 2255/9205 (2013.01); B01D 2255/9207 (2013.01); C01P 2004/51 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2006/12 (2013.01); F01N 2370/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A nanocrystal-sized cerium-zirconium-aluminum mixed oxide material comprising between 25% to 55% by mass zirconium oxide;
between 15% to 40% by mass cerium oxide;
between 10% to 45% by mass aluminum oxide; and
a total of 3% to 10% by mass of at least one oxide of a rare earth metal selected from the group of lanthanum, neodymium, praseodymium, or yttrium;
wherein the nanocrystal-sized cerium-zirconium-aluminum mixed oxide material exhibits hierarchically ordered aggregates having a d50 particle size less than 750 nm after milling formed of nano-sized oxide particles consisting of oxide crystallite having a size ranging from 5 nm to 30 nm;
wherein the nanocrystal-sized cerium-zirconium-aluminum mixed oxide material exhibits a specific surface area (SSA) of at least 40 m2/g after aging at 1,000° C. for 6 hours; and
wherein the SSA and pore volume (PV) is 75% or more of the SSA and PV of the nanocrystal-sized cerium-zirconium-aluminum mixed oxide material prior to milling step.