Multi-scaled oxygen storage material based on ceria-zirconia having high oxygen storage and releasing ability and a preparation method thereof

Patent metadata

Field	Value
Publication number	US-2017297000-A1
Application number	US-201615297760-A
Country	US
Kind code	A1
Filing date	Oct 19, 2016
Priority date	Apr 14, 2016
Publication date	Oct 19, 2017
Grant date	—

Abstract

A multi-scaled oxygen storage material wherein cobalt element is complexed with a size of an atom or hundreds of nanometers or smaller in a ceria-zirconia solid solution and a method for preparing the same are provided.
Specifically, The multi-scaled oxygen storage material contains a ceria-zirconia solid solution, a cobalt dopping contained in the solid solution in the form of an atom and a cobalt-based nanocluster dispersed in the solid solution as cobalt oxide and exhibits a microstructure distinguished from that of the existing ceria-zirconia (CZO)-based oxygen storage material as well as remarkably improved oxygen storage and release ability, and the method for preparing the same is provided.

First claim

1 . A multi-scaled oxygen storage material comprising:
a ceria-zirconia solid solution; and a cobalt dopping included in the solid solution in a form of an atom at or below a saturation concentration.

2 . The multi-scaled oxygen storage material according to claim 1 , wherein the cobalt dopping is included at a concentration of more than 0 to equal to or less than 5 mol %.

3 . The multi-scaled oxygen storage material according to claim 1 , comprising the cobalt dopping at a saturation concentration, and further comprising a cobalt-based nanocluster dispersed in the solid solution in a form of cobalt oxide.

4 . The multi-scaled oxygen storage material according to claim 3 , wherein the cobalt-based nanocluster is included at a concentration of more than 0 to equal to or less than 45 mol %.

5 . A method for preparing the multi-scaled oxygen storage material according to claim 1 , which comprises:
(a) stirring a mixture of cerium nitrate (Ce(NO 3 ) 3 .6H 2 O), zirconium nitrate (ZrO(NO 3 ) 2 ), cobalt nitrate (Co(NO 3 ) 2 .6H 2 O) and glycine, and then reacting the mixture; and (b) calcining the mixture.

6 . A method for preparing the multi-scaled oxygen storage material according to claim 2 , which comprises:
(a) stirring a mixture of cerium nitrate (Ce(NO 3 ) 3 .6H 2 O), zirconium nitrate (ZrO(NO 3 ) 2 ), cobalt nitrate (Co(NO 3 ) 2 .6H 2 O) and glycine, and then reacting the mixture; and (b) calcining the mixture.

7 . A method for preparing the multi-scaled oxygen storage material according to claim 3 , which comprises:
(a) stirring a mixture of cerium nitrate (Ce(N 3 O) 3 .6H 2 O), zirconium nitrate (ZrO(NO 3 ) 2 ), cobalt nitrate (Co(NO 3 ) 2 .6H 2 O) and glycine, and then reacting the mixture; and (b) calcining the mixture.

8 . A method for preparing the multi-scaled oxygen storage material according to claim 4 , which comprises:
(a) stirring a mixture of cerium nitrate (Ce(NO 3 ) 3 .6H 2 O), zirconium nitrate (ZrO(NO 3 ) 2 ), cobalt nitrate (Co(NO 3 ) 2 .6H 2 O) and glycine, and then reacting the mixture; and (b) calcining the mixture.

Assignees

• Korea Inst Sci & Tech

Inventors

• Kim Hyoung Chul
• Lee Hae Weon
• Kim Byung Kook
• Lee Jong Ho
• Son Ji Won
• Yoon Kyung Joong
• Hong Jong Sup
• Song Seung Hak

Classifications

• B01D53/94

  by catalytic processes · CPC title

• B01J20/06 Primary

  comprising oxides or hydroxides of metals not provided for in group B01J20/04 · CPC title

• B01D53/02

  by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} · CPC title

• B01J23/10

  of rare earths · CPC title

• B01D2256/12

  Oxygen · CPC title