Amalgam electrode, method for manufacturing the same, and method for electrochemical reduction of carbon dioxide using the same

Patent metadata

Field	Value
Publication number	US-2016298247-A1
Application number	US-201415037236-A
Country	US
Kind code	A1
Filing date	Nov 20, 2014
Priority date	Nov 20, 2013
Publication date	Oct 13, 2016
Grant date	—

Abstract

The present invention relates to a method for manufacturing an amalgam electrode, an amalgam electrode manufactured by the method, and a method for electrochemical reduction of carbon dioxide using the amalgam electrode.

First claim

1 . A method for manufacturing an amalgam electrode, comprising:
electroplating mercury (Hg) and a metal selected from the group consisting of Ag, Sn, Cu, Zn, Pb, Sb, and combinations thereof on a surface of a substrate electrode.

2 . The method for manufacturing an amalgam electrode of claim 1 ,
wherein the substrate electrode includes a porous substrate, a plate-shaped substrate, or a rod-shaped substrate.

3 . The method for manufacturing an amalgam electrode of claim 1 ,
wherein the substrate electrode contains a material selected from the group consisting of copper, tin, nickel, carbon, glassy carbon, silver, gold, and combinations thereof.

4 . The method for manufacturing an amalgam electrode of claim 1 ,
wherein the electroplating includes immerging the substrate electrode in a solution containing the mercury or the metal, and then electrochemically reducing the mercury or the metal.

5 . The method for manufacturing an amalgam electrode of claim 1 , including:
forming a mercury layer on the surface of the substrate electrode by the electroplating; forming a metal layer containing the metal selected from the group consisting of Ag, Sn, Cu, Zn, Pb, Sb, and combinations thereof on the mercury layer by the electroplating; and amalgam-setting the mercury layer and the metal layer, wherein the above-described process is performed by one or more times.

6 . The method for manufacturing an amalgam electrode of claim 1 , including:
forming a metal layer containing the metal selected from the group consisting of Ag, Sn, Cu, Zn, Pb, Sb, and combinations thereof on the surface of the substrate electrode by the electroplating; forming a mercury layer on the metal layer by the electroplating; and amalgam-setting the metal layer and the mercury layer, wherein the above-described process is performed by one or more times.

7 . An amalgam electrode manufactured by the method of claim 1 .

8 . A method for electrochemical reduction of carbon dioxide using gam electrode of claim 7 .

9 . The method for electrochemical reduction of carbon dioxide of claim 8 , comprising:
supplying a solution containing carbon dioxide to a reduction electrode unit in an electrochemical reactor; and reducing the carbon dioxide by applying a current to a working electrode including the amalgam electrode and a counter electrode.

10 . The method for electrochemical reduction of carbon dioxide of claim 9 ,
wherein the solution contains an electrolyte selected from the group consisting of KHCO 3 , NaHCO 3 , K 2 SO 4 , NaCl, KCl, and combinations thereof.

11 . The method for electrochemical reduction of carbon dioxide of claim 9 ,
wherein the current is from 1 mA/cm 2 to 200 mA/cm 2 .

Assignees

• Univ Sogang Res Foundation

Inventors

• Shin Woonsup
• Park Mijung

Classifications

• C25D3/54

  of metals not provided for in groups C25D3/04 - C25D3/50 · CPC title

• C25B11/035

  Chemistry & Metallurgy · mapped topic

• C25B11/02

  characterised by shape or form · CPC title

• C25D3/30

  of tin · CPC title

• C25D3/46

  of silver · CPC title