Back to results
US 11,439,983 B2Granted
Active perovskite-type catalysts stable to high temperature aging for gasoline exhaust gas applications
AssigneeJohnson Matthey Public Limited Company
InventorsShuhei Nagaoka, Kerry Simmance, Andrea Eva Pascui, Emily Price
Life of this patent
Estimating the term…
Abstract
Compositions, articles, and methods related to a three-way-catalyst composition comprising a perovskite-type compound of formula (I): LazB1-qB′qO3±δ or formula (II):[BOx]y:[LazBO3±δ]1-y and a non-redox active component; wherein B or B′ is Fe, Mn, Co, Ni, Cu, Ti, or Zr; q is in a range from about 0 to about 0.5; x is from about 1 to about 2.5; y is from about 1 to about 30 wt %; z is about 0.6 to about 1.1; δ is in a range from about 0 to about 0.6.
Claims19
A three-way catalyst composition comprising a perovskite-type compound of formula (I):
- LazB1-qB′qO3±δ or formula (II):
- [BOx]y:[LazBO3±δ]1-y and a non-redox active component;
- wherein
- B or B′ is Fe, Mn, Co, Ni, Cu, Ti, or Zr;
- q is in a range from 0 to 0.5;
- δ is in a range from 0 to 0.6;
- x is from 1 to 2.5;
- y is from 1 to 30 wt %;
- z is 0.6 to 1.1;
- and
- wherein the perovskite-type compound has high surface area of at least 40 m2/g.
8 more elements
Dependencies are inferred from the claim text.