Photoelectrode including catalyst retaining layer, method of preparing the same, and photoelectrochemical cell including photoelectrode

Patent metadata

Field	Value
Publication number	US-2019062929-A1
Application number	US-201815923065-A
Country	US
Kind code	A1
Filing date	Mar 16, 2018
Priority date	Aug 24, 2017
Publication date	Feb 28, 2019
Grant date	—

Abstract

The present disclosure relates to a photoelectrode including a catalyst retaining layer, a method of preparing the same, and a photoelectrochemical cell including the photoelectrode.

First claim

We claim:

1 . A photoelectrode for cathode, comprising:
an electrode formed on a substrate; a photoactive layer formed on the electrode and configured to receive light and generate an electron; a catalyst retaining layer formed on the photoactive layer and configured to improve the mobility of the electron; and a catalyst layer formed on the catalyst retaining layer and containing a metal catalyst, wherein the catalyst retaining layer binds the metal catalyst contained in the catalyst layer to reduce desorption of the metal catalyst from the catalyst layer.

2 . The photoelectrode for cathode of claim 1 , further comprising:
a buffer layer between the photoactive layer and the catalyst retaining layer or between the electrode and the photoactive layer.

3 . The photoelectrode for cathode of claim 1 ,
wherein the catalyst retaining layer contains a carbonaceous material.

4 . The photoelectrode for cathode of claim 3 ,
wherein the carbonaceous material includes reduced graphene oxide (rGO) or graphene oxide (GO).

5 . The photoelectrode for cathode of claim 1 ,
wherein the catalyst retaining layer has a thickness of from 0.3 nm to 3 nm.

6 . The photoelectrode for cathode of claim 1 ,
wherein the catalyst layer includes an element selected from the group consisting of Pt, Co, Rh, Ir, Ru, Re, Au, Ag, Cu, Ni, Mo, Fe, Sn, Bi, Zn, Ga, Pb, Sn, Ti, In, Cd, W, Ta, Nb, and combinations thereof.

7 . The photoelectrode for cathode of claim 1 ,
wherein the catalyst layer is in the form of nanoparticles, thin film, or 3 D nanostructure.

8 . A photoelectrochemical cell comprising:
a photoelectrode for cathode of claim 1 ; a counter electrode electrically connected with the photoelectrode for cathode; and an electrolyte.

9 . The photoelectrochemical cell of claim 8 ,
wherein the photoelectrochemical cell generates hydrogen by splitting water.

10 . The photoelectrochemical cell of claim 8 ,
wherein the photoelectrochemical cell reduces carbon dioxide.

11 . A method of preparing a photoelectrode for cathode, comprising:
forming an electrode on a substrate; forming a photoactive layer configured to receive light and generate an electron on the electrode; forming a catalyst retaining layer configured to improve the mobility of the electron on the photoactive layer; and forming a catalyst layer containing a metal catalyst on the catalyst retaining layer, wherein the catalyst retaining layer binds the metal catalyst contained in the catalyst layer to reduce desorption of the metal catalyst from the catalyst layer.

12 . The method of preparing a photoelectrode for cathode of claim 11 ,
wherein the forming of a catalyst retaining layer is performed by a spray coating method.

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Shin Byungha
• Koo Bonhyeong
• Byun Segi

Classifications

• B05D1/005

  Spin coating · CPC title

• B01J37/348

  Electrochemical processes, e.g. electrochemical deposition or anodisation · CPC title

• C25B1/04

  by electrolysis of water · CPC title

• B01J21/18

  Carbon · CPC title

• H01L31/1828

  Electricity · mapped topic