Single atom metal doped ceria for CO oxidation and HC hydrogenation/oxidation

Patent metadata

Field	Value
Publication number	US-11745169-B1
Application number	US-202015929719-A
Country	US
Kind code	B1
Filing date	May 18, 2020
Priority date	May 17, 2019
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

Novel doped oxide and mixed-oxide materials having a metal homogenously dispersed in the form of isolated metal ions throughout the oxide lattice and methods for making the same.

First claim

What is claimed is:

1. A metal-doped oxide material having a surface area greater than 120 m 2 /g, wherein the material comprises a metal and a cerium oxide lattice, wherein the metal is homogeneously dispersed in the form of isolated metal ions uniformly distributed throughout the cerium oxide lattice.

2. The metal-doped oxide material of claim 1 wherein, the metal is a transition metal, post-transition metal, alkaline-earth metal, or lanthanide metal.

3. The metal-doped oxide material of claim 1 , wherein the material is doped with more than one metal.

4. The metal-doped oxide material of claim 1 , wherein the metal is selected from the group consisting of nickel, platinum, copper, iron, manganese, aluminum, zirconium and combinations or alloys thereof.

5. The metal-doped oxide of claim 1 is formed by:
dissolving a polymer in a solvent to produce a polymer solution;
adding a metal nitrate and cerium nitrate to the polymer solution to produce a metal-cerium solution;
allowing the metal-cerium solution to form a hard gel;
forming a powder from the gel; and
calcining the powder.

6. The metal of claim 5 , wherein the polymer is selected from the group consisting of polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), and hydroxypropyl cellulose (HPC).

7. The metal of claim 5 , wherein the polymer is polyvinylpyrrolidone (PVP).

8. The metal of claim 5 , wherein the metal is selected from the group consisting of nickel, platinum, copper, iron, manganese, aluminum, zirconium and combinations or alloys thereof.

9. The metal-doped oxide material of claim 1 , wherein the metal is atomically dispersed within the cerium oxide lattice and does not form any separate crystalline phase.

10. A catalytic converter comprising the metal-doped oxide material of claim 1 .

11. A hydrogenation catalyst comprising the metal-doped oxide material of claim 1 .

12. An oxygen transfer catalyst comprising the metal-doped oxide material of claim 1 .

13. A catalyst comprising the metal-doped oxide material of claim 1 .

14. The catalyst of claim 13 , wherein the catalytic material is platinum.

Assignees

• Delariva Andrew
• Datye Abhaya Krishna
• Riley Christopher Ryan
• Unm Rainforest Innovations

Inventors

• Delariva Andrew
• Datye Abhaya Krishna
• Riley Christopher Ryan

Classifications

• B01J35/45

  Nanoparticles · CPC title

• B01J23/894 Primary

  with rare earths or actinides · CPC title

• B01J23/63

  with rare earths or actinides · CPC title

• B01J23/892

  Nickel and noble metals · CPC title

• B01J37/036

  to form a gel or a cogel · CPC title