Ethylene-selective electrode with a mixed valence cu4o3 catalyst

Patent metadata

Field	Value
Publication number	US-2020385877-A1
Application number	US-201816763157-A
Country	US
Kind code	A1
Filing date	Oct 19, 2018
Priority date	Nov 16, 2017
Publication date	Dec 10, 2020
Grant date	—

Abstract

An electrode including Cu4O3, in particular an ethylene-selective electrode with a mixed valence Cu4O3 catalyst. A method for producing an electrode of this type, an electrolytic cell having an electrode of this type, and a method for electrochemically converting carbon dioxide using such an electrode including Cu4O3.

First claim

1 . An electrode, comprising:
Cu 4 O 3 .

2 . The electrode as claimed in claim 1 ,
wherein the Cu 4 O 3 is present in an amount of 0.1-100% by weight based on the electrode.

3 . The electrode as claimed in claim 1 ,
wherein the Cu 4 O 3 has been applied to a support.

4 . The electrode as claimed in claim 3 ,
wherein the Cu 4 O 3 has been applied with a mass coverage of at least 0.5 mg/cm 2 .

5 . The electrode as claimed in claim 1 ,
wherein the electrode is a gas diffusion electrode.

6 . An electrolysis cell, comprising:
an electrode as claimed in claim 1 .

7 . A process for producing an electrode comprising Cu 4 O 3 on a substrate, the process comprising:
preparing a mixture comprising Cu 4 O 3 and optionally at least one binder, or providing a powder consisting of Cu 4 O 3 , applying the mixture comprising Cu 4 O 3 or the powder consisting of Cu 4 O 3 to a support, preferably in the form of a sheetlike structure, and dry rolling the mixture comprising Cu 4 O 3 or the powder consisting of Cu 4 O 3 onto the support.

8 . The process as claimed in claim 7 ,
wherein the preparing of the mixture comprises mixing for 60-200 s.

9 . The process as claimed in claim 7 ,
wherein the rolling application is effected at a temperature of 25-100° C.

10 . A process for producing an electrode comprising Cu 4 O 3 on a substrate, the process comprising:
providing a support, applying a suspension comprising Cu 4 O 3 and optionally at least one binder to the support, and drying the suspension; or providing a support, and applying Cu 4 O 3 or a mixture comprising Cu 4 O 3 from the gas phase.

11 . The process as claimed in claim 10 ,
wherein the support is a gas diffusion electrode or gas diffusion layer.

12 . The process as claimed in claim 7 ,
wherein the at least one binder is present in the mixture.

13 . The process as claimed in claim 12 ,
wherein the at least one binder is present in the mixture in an amount of >0 to 30% by weight, based on the total weight of Cu 4 O 3 and the at least one binder.

14 . A process for producing the electrode of claim 1 , the process comprising:
producing a powder comprising Cu 4 O 3 ; and rolling the powder out to give an electrode.

15 . A process for electrochemical conversion of carbon dioxide and/or carbon monoxide, the process comprising:
introducing carbon dioxide and/or carbon monoxide at the cathode into an electrolysis cell comprising an electrode as claimed in claim 1 as cathode and reduced.

16 . A process for reduction of CO 2 and/or CO, comprising:
using the electrode of claim 1 .

17 . A process for the electrolysis of CO 2 and/or CO, comprising:
using the electrode of claim 1 .

18 . The electrode as claimed in claim 2 ,
wherein the Cu 4 O 3 is present in an amount of 40-100% by weight based on the electrode.

19 . The electrode as claimed in claim 2 ,
wherein the Cu 4 O 3 is present in an amount of 70-100% by weight based on the electrode.

20 . The process as claimed in claim 9 ,
wherein the rolling application is effected at a temperature of 60-80° C.

Assignees

• Siemens Ag

Inventors

• Martic Nemanja
• Reller Christian
• Schmid Günter
• Schmid Bernhard
• Reinisch David

Classifications

• C25B11/093

  at least one noble metal or noble metal oxide and at least one non-noble metal oxide · CPC title

• C25B13/00

  Diaphragms; Spacing elements · CPC title

• C25B11/065

  Carbon · CPC title

• C25B11/054

  Electrodes comprising electrocatalysts supported on a carrier · CPC title

• C25B11/032

  Gas diffusion electrodes · CPC title