Photocatalytic reduction of carbon dioxide to methanol or carbon monoxide using cuprous oxide

Patent metadata

Field	Value
Publication number	US-10696614-B2
Application number	US-201715858307-A
Country	US
Kind code	B2
Filing date	Dec 29, 2017
Priority date	Dec 29, 2017
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

Provided herein are methods of CO2 reduction to methanol or CO using a Cu2O catalyst.

First claim

What is claimed:

1. A method of converting CO 2 to methanol comprising irradiating CO 2 , water, and a catalyst consisting essentially of Cu 2 O nanoparticles having a (i i 0) facet to photocatalytically form methanol, wherein i is 1 to 12.

2. The method of claim 1 , wherein the irradiating comprises exposure to ultraviolet to visible light.

3. The method of claim 1 , wherein the irradiating comprises exposure to light having one or more wavelengths from 200 to 650 nm.

4. The method of claim 1 , wherein the water is present as a liquid.

5. The method of claim 1 , wherein the water is present as water vapor.

6. The method of claim 1 , wherein the (i i 0) facet is a (110) facet.

7. The method of claim 6 , wherein the Cu 2 O nanoparticles having a (110) facet are octahedral, truncated cubic, or a mixture thereof.

8. The method of claim 7 , wherein the irradiating comprises exposure to ultraviolet to visible light.

9. The method of claim 8 , wherein the irradiating comprises exposure to light having one or more wavelengths from 200 to 650 nm.

10. The method of claim 1 , where the method exhibits a quantum efficiency of at least 50%.

11. The method of claim 10 , wherein the quantum efficiency is at least 70%.

12. The method of claim 1 , wherein the CO 2 is continuously flowed through a suspension of the Cu 2 O nanoparticles in water during the irradiating.

13. The method of claim 1 , wherein the Cu 2 O nanoparticles having a (i i 0) facet are prepared by a method comprising admixing copper acetate, sodium hydroxide, glucose, and a surfactant and heating the admixture to 60° C. for 30-90 minutes to form the Cu 2 O nanoparticles having a (i i 0) facet.

14. The method of claim 13 , wherein the surfactant comprises sodium dodecyl sulfate.

15. A method of converting CO 2 to CO comprising
irradiating CO 2 , water, and a catalyst consisting essentially of MoS 2 adsorbed onto Cu 2 O nanoparticles to photocatalytically form CO,
wherein the Cu 2 O nanoparticles have a (i i 0) facet, and i is 1 to 12.

16. The method of claim 15 , wherein the irradiating comprises exposure to ultravisible to visible light.

17. The method of claim 15 , wherein the irradiating comprises exposure to light having one or more wavelengths from 200 to 650 nm.

18. The method of claim 15 , wherein the (i i 0) facet is a (110) facet.

19. The method of claim 15 , wherein the Cu 2 O nanoparticles having a (i i 0) facet are octahedral, truncated cubic, or a mixture thereof.

20. The method of claim 15 , wherein the Cu 2 O nanoparticles having a (i i 0) facet are prepared by a method comprising admixing copper acetate, sodium hydroxide, glucose, and a surfactant and heating the admixture to 60° C. for 30-90 minutes to form the Cu 2 O nanoparticles having a (i i 0) facet.

Assignees

• Uchicago Argonne Llc

Inventors

• Wu Yimin
• Rajh Tijana
• Mcnulty Ian
• Liu Yuzi

Classifications

• B01J2235/15

  X-ray diffraction · CPC title

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• B01J35/70

  characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00) · CPC title

• B01J2235/00

  Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title

• Y02P20/52

  using catalysts, e.g. selective catalysts · CPC title