Basic electrocatalyst for carbon dioxide reduction and ethylene production, electrode and apparatus each including the same, and method of manufacturing the electrode

Patent metadata

Field	Value
Publication number	US-2020392632-A1
Application number	US-202016869600-A
Country	US
Kind code	A1
Filing date	May 8, 2020
Priority date	Jun 12, 2019
Publication date	Dec 17, 2020
Grant date	—

Abstract

Provided are a basic electrocatalyst applied to a carbon dioxide reduction and ethylene production system, a basic electrocatalyst electrode and an apparatus each including the same, and a method of manufacturing the basic electrocatalyst electrode. The basic electrocatalyst electrode for for carbon dioxide reduction and ethylene production includes: catalyst particles each including copper hydroxide (Cu(OH)2); and a basic compound. Since the basic electrocatalyst electrode has high carbon dioxide reduction performance and high ethylene selectivity, the basic electrocatalyst electrode may be applied to a reduction electrode of a carbon dioxide reduction and ethylene production apparatus and may exhibit high current density and high ethylene selectivity. The basic electrocatalyst electrode may be manufactured by a simple method, and may be applied to a large-area electrode.

First claim

What is claimed is:

1 . A basic electrocatalyst for carbon dioxide reduction and ethylene production, the basic electrocatalyst comprising:
catalyst particles each including copper hydroxide (Cu(OH) 2 ); and basic particles each including a basic compound.

2 . The basic electrocatalyst of claim 1 , wherein the basic compound includes at least one selected from KOH, NaOH, LiOH, RbOH, CsOH, FrOH, Be(OH) 2 , Ca(OH) 2 , Mg(OH) 2 , Sr(OH) 2 , Ba(OH) 2 , and Ra(OH) 2 .

3 . The basic electrocatalyst of claim 1 , wherein each of the catalyst particles further includes copper(II) oxide.

4 . The basic electrocatalyst of claim 1 , wherein each of the catalyst particles has a form in which nanoscale primary particles are aggregated.

5 . The basic electrocatalyst of claim 1 , wherein the basic particles have a nanoparticle form of 10 nm or less, a secondary particle form in which the nanoparticles are aggregated, a single particle form having an average particle size of about 0.01 μm to about 2 μm, or a mixed form thereof.

6 . The basic electrocatalyst of claim 1 , wherein an amount of the basic particles is about 10 parts by weight to about 1000 parts by weight based on 100 parts by weight of the catalyst particles.

7 . The basic electrocatalyst of claim 1 , wherein each of the catalyst particles further includes, coated or doped on a surface thereof, at least one element selected from, K, Na, Li, Rb, Cs, Fr, Be, Ca, Mg, Sr, Ba, and Ra.

8 . The basic electrocatalyst of claim 7 , wherein the at least one element coated or doped on the surface of each of the catalyst particles has a hydroxide form.

9 . The basic electrocatalyst of claim 1 , wherein the basic electrocatalyst has a nanoporous structure.

10 . A basic electrocatalyst electrode for carbon dioxide reduction and ethylene production, the basic electrocatalyst electrode comprising: the basic electrocatalyst of claim 1 .

11 . A carbon dioxide reduction and ethylene production apparatus comprising: the basic electrocatalyst electrode of claim 10 .

12 . A method of manufacturing the basic electrocatalyst electrode of claim 10 for carbon dioxide reduction and ethylene production, the method comprising:
applying a mixed solution including a basic compound and copper particles onto a substrate; and
heat-treating the substrate coated with the mixed solution to form a catalyst layer.

13 . The method of claim 12 , wherein the basic compound includes at least one selected from KOH, NaOH, LiOH, RbOH, CsOH, FrOH, Be(OH) 2 , Ca(OH) 2 , Mg(OH) 2 , Sr(OH) 2 , Ba(OH) 2 , and Ra(OH) 2 .

14 . The method of claim 12 , wherein the mixed solution further includes a halogen material.

15 . The method of claim 14 , wherein the halogen material includes at least one selected from KI, KCI, NaCI, Nal, NaBr, and KBr.

16 . The method of claim 12 , wherein the copper particles are supported on a carbon-based support.

17 . The method of claim 16 , wherein the carbon-based support includes at least one selected from carbon black, carbon nanotubes, graphene, carbon nanofibers, and graphitized carbon black.

18 . The method of claim 12 , wherein each of the copper particles includes at least one selected from Cu, Cu 2 O, CuO, and Cu(OH) 2.

19 . The method of claim 12 , wherein the copper particles have an average particle diameter of about 1 nm to about 100 μm.

20 . The method of claim 12 , wherein the substrate is an anion exchange membrane.

21 . The method of claim 12 , further comprising forming a gas diffusion layer on the catalyst layer.

Assignees

• Korea Inst Sci & Tech

Inventors

• Oh Hyung-Suk
• Min Byoung Koun
• Hwang Yun Jeong
• Lee Ung
• Lee Dong Ki
• Won Dahye
• Lee Woong Hee

Classifications

• C25B11/065

  Carbon · CPC title

• C25B3/26

  of carbon dioxide · CPC title

• C25B1/34

  Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis · CPC title

• C25B1/20

  Hydroxides · CPC title

• C25B1/16

  Hydroxides (by simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine C25B1/34) · CPC title