Electrode catalyst for water electrolysis cell, water electrolysis cell and water electrolyzer

Patent metadata

Field	Value
Publication number	US-2023220571-A1
Application number	US-202318183210-A
Country	US
Kind code	A1
Filing date	Mar 14, 2023
Priority date	Oct 2, 2020
Publication date	Jul 13, 2023
Grant date	—

Abstract

An electrode catalyst for a water electrolysis cell includes a catalyst, and a polymer of intrinsic microporosity having a Tröger's base skeleton containing a quaternary ammonium group. A water electrolysis cell includes an anode, a cathode, and an electrolyte membrane. The electrolyte membrane is disposed between the anode and the cathode. At least one selected from the group consisting of the anode and the cathode includes the electrode catalyst.

First claim

What is claimed is:

1 . An electrode catalyst for a water electrolysis cell, the electrode catalyst including:
a catalyst; and a polymer of intrinsic microporosity having a Tröger's base skeleton containing a quaternary ammonium group.

2 . The electrode catalyst for the water electrolysis cell according to claim 1 , wherein
the catalyst includes a layered double hydroxide.

3 . The electrode catalyst for the water electrolysis cell according to claim 1 , the electrode catalyst further including:
a carrier supporting the catalyst, wherein the carrier includes at least one selected from the group consisting of a transition metal and carbon.

4 . The electrode catalyst for the water electrolysis cell according to claim 1 , wherein
the catalyst includes iridium oxide.

5 . The electrode catalyst for the water electrolysis cell according to claim 1 , wherein
the polymer of intrinsic microporosity is composed of a single kind of a monomer.

6 . The electrode catalyst for the water electrolysis cell according to claim 1 , wherein
the polymer of intrinsic microporosity includes a group of atoms linking a plurality of nitrogen-containing heterocyclic rings to one another, and the group of atoms includes an aromatic ring.

7 . The electrode catalyst for the water electrolysis cell according to claim 6 , wherein
the group of atoms does not include a crown ether.

8 . A water electrolysis cell comprising:
an anode; a cathode; and an electrolyte membrane disposed between the anode and the cathode, wherein at least one selected from the group consisting of the anode and the cathode includes the electrode catalyst according to claim 1 .

9 . The water electrolysis cell according to claim 8 , wherein
the electrolyte membrane includes an anion exchange membrane.

10 . A water electrolysis cell comprising:
a diaphragm separating a first space and a second space from each other; an anode disposed in the first space; and a cathode disposed in the second space, wherein at least one selected from the group consisting of the anode and the cathode includes the electrode catalyst according to claim 1 .

11 . A water electrolyzer comprising:
the water electrolysis cell according to claim 8 ; and a voltage applicator connected to the anode and the cathode and capable of applying a voltage between the anode and the cathode.

12 . A water electrolyzer comprising:
the water electrolysis cell according to claim 10 ; and a voltage applicator connected to the anode and the cathode and capable of applying a voltage between the anode and the cathode.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Shirataki Hiroshi
• Murase Hideaki
• Hayashi Takao
• Suzuka Michio

Classifications

• C25B11/075

  consisting of a single catalytic element or catalytic compound · CPC title

• C25B11/057 Primary

  consisting of a single element or compound · CPC title

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title

• C25B11/054

  Electrodes comprising electrocatalysts supported on a carrier · CPC title

• C25B9/23

  comprising ion-exchange membranes in or on which electrode material is embedded · CPC title