Method for Preparing Large-area Catalyst Electrode

Patent metadata

Field	Value
Publication number	US-2021123152-A1
Application number	US-202017076815-A
Country	US
Kind code	A1
Filing date	Oct 22, 2020
Priority date	Oct 23, 2019
Publication date	Apr 29, 2021
Grant date	—

Abstract

A method for preparing a large-area catalyst electrode includes the following steps: (A) providing an iron compound, a cobalt compound and a nickel compound, and dissolving these metal compounds in a solvent to form a mixed metal compound solution, and (B) providing a cathode and an anode, and performing a cathodic electrochemical deposition to the cathode, the anode and the mixed metal compound solution in a condition of constant voltage or constant current through a two-electrode method, followed by obtaining a catalyst electrode from the cathode. In the method for preparing the large-area catalyst electrode of the present invention, the large-area catalyst electrode having good dual-function water electrolysis catalytic property can be prepared by the steps of preparing the electrolyte, the electrochemical deposition, and the like. The process is simple and energy-saving.

First claim

What is claimed is:

1 . A method for preparing a large-area catalyst electrode, comprising following steps:
(A) providing an iron compound, a cobalt compound and a nickel compound, and dissolving the iron compound, the cobalt compound and the nickel compound in a solvent to form a mixed metal compound solution, and (B) providing a cathode and an anode, and performing a cathodic electrochemical deposition to the cathode, the anode and the mixed metal compound solution through a two-electrode method in a condition of constant voltage or constant current, followed by obtaining a catalyst electrode from the cathode.

2 . The method for preparing the large-area catalyst electrode of claim 1 , wherein the iron compound is ammonium iron sulfate, iron chloride, iron nitrate, iron sulfate or iron-containing coordination compound.

3 . The method for preparing the large-area catalyst electrode of claim 1 , wherein the cobalt compound is cobalt chloride, cobalt nitrate, cobalt sulfate or cobalt-containing coordination compound.

4 . The method for preparing the large-area catalyst electrode of claim 1 , wherein the nickel compound is nickel chloride, nickel nitrate, nickel sulfate or nickel-containing coordination compound.

5 . The method for preparing the large-area catalyst electrode of claim 1 , wherein the solvent is selected from water, methanol, ethanol, isopropanol, 1-butanol, acetone solution or combinations thereof.

6 . The method for preparing the large-area catalyst electrode of claim 1 , wherein a material of the cathode or the anode is selected from graphite, nickel, copper or stainless steel, and an area of the anode is greater than or equal to an area of the cathode.

7 . The method for preparing the large-area catalyst electrode of claim 1 , wherein a structure of the cathode or the anode is foam, plate or mesh.

8 . The method for preparing the large-area catalyst electrode of claim 1 , wherein a concentration of the iron compound, the cobalt compound or the nickel compound ranges from 0.01M to 0.5M.

9 . The method for preparing the large-area catalyst electrode of claim 1 , wherein the constant current ranges from 0.1 A to 1 A, and an electrochemical deposition time ranges from 1 min to 20 min in the step (B).

10 . The method for preparing the large-area catalyst electrode of claim 1 , wherein the constant voltage ranges from 0.1V to 1V and an electrochemical deposition time ranges from 1 min to 20 min in the step (B).

Assignees

• Nat Chung Shan Inst Science & Tech

Inventors

• Lai Kuan-Ting
• Lu Chung-Yen
• Hao Chia-Kan

Classifications

• C25B11/04

  characterised by the material · CPC title

• C25D13/12

  characterised by the article coated · CPC title

• C25D13/02 Primary

  with inorganic material · CPC title

• C25B11/051

  Electrodes formed of electrocatalysts on a substrate or carrier · CPC title

• C25D3/562

  containing more than 50% by weight of iron or nickel or cobalt · CPC title