Methods of preparing metal / metal oxide materials from nanostructured substrates and uses thereof

Patent metadata

Field	Value
Publication number	US-2016361707-A1
Application number	US-201515121598-A
Country	US
Kind code	A1
Filing date	Feb 25, 2015
Priority date	Feb 26, 2014
Publication date	Dec 15, 2016
Grant date	—

Abstract

A method of preparing a metal/metal oxide material can make use of a nanostructure that includes a first metal to form the metal oxide, and a reaction surface with a reducing agent on the reaction surface. A second metal is deposited onto the reaction surface to form a bimetallic product. The bimetallic product is calcined to form the metal/metal oxide material.

First claim

1 . A method of preparing a metal/metal oxide material, the method comprising:
providing a nanostructure, wherein the nanostructure comprises a first metal to form the metal oxide, and a reaction surface with a reducing agent on the reaction surface; depositing a second metal onto the reaction surface to form a bimetallic product; and calcining the bimetallic product to form the metal/metal oxide material.

2 . The method according to claim 1 wherein the reducing agent is an organic reducing agent.

3 . The method according to claim 1 wherein the reducing agent is formate.

4 . The method according to claim 1 wherein the nanostructure is aluminum formate, tin formate, mixed metal formate, cerium formate, doped cerium formate or cerium formate nanospheres.

5 . (canceled)

6 . The method according to claim 1 wherein the reducing agent is bound to the reaction surface.

7 . The method according to claim 6 wherein the reducing agent forms a surface layer on the reaction surface of the nanostructure.

8 . The method according to claim 6 wherein the nanostructure is cerium hydroxycarbonate or cerium hydroxycarbonate nanorods.

9 . (canceled)

10 . The method according to claim 1 wherein the second metal forms a layer on a surface of the bimetallic product.

11 . The method according to claim 10 wherein depositing the second metal onto the reaction surface comprises reacting a metal salt of the second metal with the nanostructure, wherein the metal salt comprises the second metal in oxidized form.

12 . The method according to claim 11 wherein the metal salt is in aqueous solution.

13 . The method according to claim 11 wherein reacting the metal salt with the nanostructure comprises reducing the second metal in oxidized form and oxidizing the reducing agent to form the bimetallic product.

14 . The method according to claim 13 wherein oxidative by-products of the reducing agent are on the surface of the bimetallic product.

15 . The method according to claim 14 wherein the oxidative by-products of the reducing agent comprise carbonate.

16 . The method according to claim 1 wherein the metal/metal oxide material is a methane oxidation catalyst.

17 . (canceled)

18 . The method according to claim 16 wherein T 50 of the methane oxidation catalyst is about 300° C. or less.

19 . (canceled)

20 . (canceled)

21 . The method according to claim 1 wherein the second metal deposited onto the reaction surface is palladium, gold, silver, platinum, copper, iron, lead, tin, nickel or cobalt.

22 . The method according to claim 1 wherein providing the nanostructure comprises reacting a cerium-containing starting material with a solvent at a reaction temperature.

23 . (canceled)

24 . The method according to claim 22 wherein the solvent is ethylene glycol.

25 . The method according to claim 22 wherein the cerium-containing starting material is a cerium (III) starting material.

26 . The method according to claim 1 wherein the metal oxide of the metal/metal oxide material is cerium oxide.

27 - 64 . (canceled)

Assignees

• Univ British Columbia

Inventors

• Maclachlan Mark
• Wolf Michael
• Anandhanatarajan Gomathi

Classifications

• B01D2257/7025

  Methane · CPC title

• B01J37/0209

  involving a reaction between the support and a fluid · CPC title

• C01B13/18

  by thermal decomposition of compounds, e.g. of salts or hydroxides · CPC title

• B01D2255/40

  Mixed oxides · CPC title

• B01J37/0201

  Impregnation · CPC title