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-12480218-B2
Application number	US-202016869600-A
Country	US
Kind code	B2
Filing date	May 8, 2020
Priority date	Jun 12, 2019
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

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 . An electrode for carbon dioxide reduction and ethylene production, the electrode comprising a basic electrocatalyst comprising:
catalyst particles including copper hydroxide (Cu(OH) 2 ); and basic particles including a basic compound, wherein the basic particles have a nanoparticle form of 10 nm or less, a secondary particle form in which the nanoparticles of 10 nm or less form an aggregate, or a mixed form thereof; wherein the catalyst particles and the basic particles are supported on a microporous substrate, wherein the catalyst particles include little or no elemental copper as observed in an X-ray diffraction pattern of the catalyst particles, and wherein the basic compound includes at least one of KOH, NaOH, LiOH, RbOH, CsOH, FrOH, Be(OH) 2 , Ca(OH) 2 , Mg(OH) 2 , Sr(OH) 2 , Ba(OH) 2 , or Ra(OH) 2 .

2 . The electrode of claim 1 , wherein the microporous substrate is a carbon-based support.

3 . The electrode of claim 2 , wherein the carbon-based support includes at least one of carbon black, carbon nanotubes, graphene, carbon nanofibers, or graphitized carbon black.

4 . The electrode of claim 1 , further comprising a gas diffusion layer on the basic electrocatalyst catalyst.

5 . The electrode of claim 1 , wherein the catalyst particles further comprises copper(II)oxide, and a surface of the catalyst particles are coated or doped with at least one element of K, Na, Li, Rb, Cs, Fr, Be, Ca, Mg, Sr, Ba, or Ra, or the hydroxide of each element thereof.

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

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

8 . The electrode 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.

9 . A carbon dioxide reduction and ethylene production apparatus comprising: the basic electrocatalyst electrode of claim 1 .

10 . A method of manufacturing the basic electrocatalyst electrode of claim 1 for carbon dioxide reduction and ethylene production, the method comprising:
applying a mixed solution including the basic compound and the catalyst particles including copper hydroxide onto the microporous substrate; and
heat-treating the microporous substrate coated with the mixed solution to form a 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

• B01J23/04

  Alkali metals · CPC title

• 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