Water oxidation catalyst including cobalt molybdenum

Patent metadata

Field	Value
Publication number	US-10619252-B2
Application number	US-201715720609-A
Country	US
Kind code	B2
Filing date	Sep 29, 2017
Priority date	Aug 28, 2014
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

A process for oxidizing water using hydrated cobalt molybdenum is disclosed. A plurality of hydrated cobalt molybdenum nanoparticles are supported on an electrode and are able to catalytically interact with water molecules generating oxygen. The catalyst can be used as part of an electrochemical or photo-electrochemical cell for the generation of electrical energy.

First claim

Having described our invention, we claim:

1. A cell for oxidizing water, said cell comprising:
water and hydrated cobalt molybdenum in contact with said water;
said hydrated cobalt molybdenum catalyzing the oxidation of water; and
further including a photo-sensitizer in said water and an electromagnetic radiation source operatively arrange to expose said water with said photo-sensitizer to electromagnetic radiation, said photo-sensitizer providing an electrical potential between said hydrated cobalt molybdenum and said water.

2. The cell of claim 1 , wherein said hydrated cobalt molybdenum is a plurality of hydrated cobalt molybdenum nanoparticles.

3. The cell of claim 1 , further including said electrical potential applied between said hydrated cobalt molybdenum and said water.

4. The cell of claim 3 , further including an electrode, said hydrated cobalt molybdenum attached to said electrode.

5. The cell of claim 1 , wherein said photo-sensitizer is a ruthenium-tris(2,2′-bipyridyl) compound.

6. The cell of claim 1 , wherein the hydrated cobalt molybdenum has a CoMoO 4 :H 2 O ratio of from 1:1 to 1:4.

7. A water oxidation catalyst for splitting water into oxygen and hydrogen ions comprising hydrated cobalt molybdenum, conductive particles, and a binder combined with nanoparticles of hydrated cobalt molybdenum.

8. The water oxidation catalyst of claim 7 wherein the hydrated cobalt molybdenum has the formula: CoMoO 4 .

9. The water oxidation catalyst of claim 7 wherein the hydrated cobalt molybdenum includes a plurality of nanoparticles having a size of less than one micrometer.

10. The water oxidation catalyst of claim 7 wherein the hydrated cobalt molybdenum has a CoMoO 4 :H 2 O ratio of from 1:1 to 1:4.

11. An electrode for electrochemical water oxidation splitting water into oxygen and hydrogen ions comprising:
a substrate;
an active material in contact with the substrate, the active material including hydrated cobalt molybdenum; and
conductive particles and a binder combined with nanoparticles of hydrated cobalt molybdenum;
wherein water is split into oxygen and hydrogen ions.

12. The electrode of claim 11 wherein the hydrated cobalt molybdenum has a CoMoO 4 :H2O ratio of from 1:1 to 1:4.

Assignees

• Toyota Eng & Mfg North America

Inventors

• Mcdonald Kenneth James
• Jia Hongfei

Classifications

• C01G51/40

  Complex oxides containing cobalt and at least one other metal element · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01B3/042 Primary

  Decomposition of water (by electrolysis of water C25B1/04) · CPC title

• C01P2004/64

  Nanometer sized, i.e. from 1-100 nanometer · CPC title

• C01P2006/40

  Electric properties · CPC title