Dye-sensitized TiO2 hybrid system with rhenium and cobalt catalysts for producing hydrogen/carbon monoxide syngas

Patent metadata

Field	Value
Publication number	US-10072215-B2
Application number	US-201715730068-A
Country	US
Kind code	B2
Filing date	Oct 11, 2017
Priority date	Dec 16, 2016
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

Disclosed is a hybrid catalyst system for the production of hydrogen/carbon monoxide syngas. The hybrid catalyst system includes a dye, a rhenium (Re) catalyst, and a cobalt (Co) catalyst grafted on a semiconductor metal oxide. The hybrid catalyst system can produce syngas without the aid of external energy and enables control over the ratio of hydrogen/carbon monoxide formed. Therefore, the hybrid catalyst system can find application in various industrial fields, including chemical fuel production.

First claim

What is claimed is:

1. A hybrid catalyst system comprising a hybrid catalyst comprising a semiconductor metal oxide, a dye, a rhenium (Re) catalyst, and a cobalt (Co) catalyst,
wherein the dye, the rhenium (Re) catalyst, and the cobalt (Co) catalyst are grafted on the semiconductor metal oxide,
wherein the rhenium (Re) catalyst is fac-[Re(4,4′-bis(diethoxyphosphoryl methyl)-2,2′-bipyridine)(CO) 3 Cl],
wherein the cobalt (Co) catalyst is Co lll Cl(dimethylglyoximato) 2 (pyridyl-4-phosphonic acid),
wherein the molar ratio of rhenium (Re) catalyst/cobalt (Co) catalyst is from 9:1 to 1:9.

2. The hybrid catalyst system according to claim 1 , wherein the semiconductor metal oxide is TiO 2 .

3. The hybrid catalyst system according to claim 1 , further comprising a sacrificial reagent as an electron donor.

4. The hybrid catalyst system according to claim 1 , further comprising a DMF/water mixture solvent.

5. The hybrid catalyst system according to claim 4 , wherein the water content is 20% by volume or less.

6. The hybrid catalyst system according to claim 1 , wherein the hybrid catalyst system produces hydrogen/carbon monoxide syngas.

7. The hybrid catalyst system according to claim 6 , wherein the hybrid catalyst system enables control over the ratio of hydrogen/carbon monoxide.

8. The hybrid catalyst system according to claim 7 , wherein the molar ratio of hydrogen/carbon monoxide is from 1:2 to 15:1.

9. The hybrid catalyst system according to claim 6 , wherein the hydrogen/carbon monoxide syngas is produced under visible light irradiation.

Assignees

• Univ Korea Res & Business Foundation Sejong Campus

Inventors

• Son Ho-Jin
• Kang Sang Ook
• Lee Jong-Su

Classifications

• B01J23/8896

  Rhenium · CPC title

• C01B3/00

  Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen (production of water-gas or synthesis gas from solid carbonaceous material C10J) · CPC title

• C07C1/10

  from carbon monoxide with water vapour · CPC title

• C07C2523/75

  Cobalt · CPC title

• C01G23/04

  Oxides; Hydroxides · CPC title