Back to results
US 9,539,542 B2Granted
Catalyst for purifying exhaust gas
AssigneeUmicore Shokubai Japan Co., Ltd.
InventorsKosuke Mikita, Masanori Ikeda, Shinji Sugihara, Hideki Goto, Takahiro Ikegami
Life of this patent
Estimating the term…
Abstract
Provided is a catalyst for purifying an exhaust gas, the catalyst excelling in catalytic performance and oxygen storage capacity. The catalyst for purifying an exhaust gas is a catalyst for purifying an exhaust gas which includes a ceria-zirconia composite oxide having a pyrochlore structure and a ceria-zirconia composite oxide having a cubic crystal structure, wherein at least a part of the ceria-zirconia composite oxide is composited with the ceria-zirconia composite oxide.
Claims13
A catalyst for purifying an exhaust gas comprising:
- an oxygen storing material which has a structure that a ceria-zirconia composite oxide (A) having a pyrochlore structure is partially or entirely coated with a ceria-zirconia composite oxide (B) having a fluorite type cubic crystal structure in a ratio of 50 to 100% relative to a surface area of the ceria-zirconia composite oxide (A).
Dependencies are inferred from the claim text.