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-10287694-B2
Application number	US-201415037236-A
Country	US
Kind code	B2
Filing date	Nov 20, 2014
Priority date	Nov 20, 2013
Publication date	May 14, 2019
Grant date	May 14, 2019

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

We claim:

1. A method for manufacturing a porous amalgam electrode for electrochemical reduction of carbon dioxide, 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 porous substrate electrode to form the porous amalgam electrode, wherein the electroplating includes immerging the porous substrate electrode in a solution containing the mercury or the metal, and then electrochemically reducing the mercury or the metal.

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

3. The method for manufacturing a porous amalgam electrode for electrochemical reduction of carbon dioxide of claim 1 , including:
forming a mercury layer on the surface of the porous 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 to form the porous amalgam electrode,
wherein the above-described process is performed by one or more times.

4. The method for manufacturing a porous amalgam electrode for electrochemical reduction of carbon dioxide 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 porous 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 to form the porous amalgam electrode,
wherein the above-described process is performed by one or more times.

5. The method for manufacturing a porous amalgam electrode for electrochemical reduction of carbon dioxide of claim 1 ,
wherein two metals selected from the group consisting of Ag, Sn, Cu, Zn, Pb, Sb and combinations thereof, are electroplated on the surface of the porous substrate electrode.

6. The method for manufacturing a porous amalgam electrode for electrochemical reduction of carbon dioxide of claim 1 , wherein the electroplating comprises:
immerging the porous substrate electrode in a first solution comprising the mercury;
forming a mercury layer on the surface of the porous substrate electrode by the electroplating;
immerging the porous substrate electrode with the mercury layer in a second solution comprising two metals selected from the group consisting of Ag, Sn, Cu, Zn, Pb, Sb and combinations thereof;
forming a metal layer on the mercury layer by the electroplating; and,
amalgam-setting the mercury layer and the metal layer to form the porous amalgam electrode.

7. The method of claim 6 , wherein the porous substrate electrode comprises a material selected from the group consisting of copper, tin, nickel, carbon, glassy carbon, silver, gold, and combinations thereof.

8. The method for manufacturing a porous amalgam electrode for electrochemical reduction of carbon dioxide of claim 1 , wherein the electroplating comprises:
immerging the porous substrate electrode in a first solution comprising two metals selected from the group consisting of Ag, Sn, Cu, Zn, Pb, Sb and combinations thereof;
forming a metal layer on the surface of the porous substrate electrode by the electroplating;
immerging the porous substrate electrode with the metal layer in a second solution comprising the mercury;
forming a mercury layer on the metal layer by the electroplating; and,
amalgam-setting the mercury layer and the metal layer to form the porous amalgam electrode.

9. The method of claim 8 , wherein the porous substrate electrode comprises a material selected from the group consisting of copper, tin, nickel, carbon, glassy carbon, silver, gold, and combinations thereof.

Assignees

• Univ Sogang Res Foundation

Inventors

• Shin Woonsup
• Park Mijung

Classifications

• C25D3/64

  containing more than 50% by weight of silver · CPC title

• C25B11/035

  Chemistry & Metallurgy · mapped topic

• C25D3/60 Primary

  containing more than 50% by weight of tin · CPC title

• C25D5/10

  Electroplating with more than one layer of the same or of different metals (for bearings C25D7/10) · CPC title

• C25D3/46

  of silver · CPC title