Polyoxometalate derivatized metal oxide electrodes

Patent metadata

Field	Value
Publication number	US-2021108319-A1
Application number	US-201916599555-A
Country	US
Kind code	A1
Filing date	Oct 11, 2019
Priority date	Oct 11, 2019
Publication date	Apr 15, 2021
Grant date	—

Abstract

A porous transparent electrode is formed where a film comprising of semiconducting nanoparticles is decorated with polyoxometalates (POMs) bonded to their surfaces. The semiconducting nanoparticles are transparent metal oxide. The semiconducting nanoparticles include tin-doped indium oxide (ITO), fluorine-doped tin oxide (FTO), or titanium dioxide (TiO 2 ). In an embodiment, the POM is [SiW 12 O 40 ] 4− ; [α-P 2 W 18 O 62 ] 6− ; or [α 2 -P 2 W 17 O 61 ] 10− . The semiconducting nanoparticles bond to the POM through a combination of electrostatic interactions and hydrogen bonds. The porous transparent electrode can be placed in a protonated form or ion-paired with alkali metal cations or tetraalkylammonium cations.

First claim

1 . A porous transparent electrode, comprising a film comprising a plurality of semiconducting nanoparticles and a plurality of polyoxometalates (POMs) bonded to a surface of the semiconducting nanoparticles,
the plurality of POMs being bonded to the semiconductor nanoparticles with metal-oxygen-metal bonds via electrostatic interactions and hydrogen bonding between the semiconductor nanoparticles and the plurality of POMs.

2 . The porous transparent electrode according to claim 1 , wherein the semiconducting nanoparticles comprise tin-doped indium oxide (ITO), fluorine-doped tin oxide (FTO), or titanium dioxide (TiO2).

3 . The porous transparent electrode according to claim 1 , wherein each POM of the plurality of POMs comprises [SiW 12 O 40 ] 4 , [α-P 2 W 18 O 62 ] 6− , or [α 2 -P 2 W 17 O 61 ] 10− .

4 . (canceled)

5 . The porous transparent electrode according to claim 1 , wherein each POM of the plurality of POMs is in a protonated form.

6 . The porous transparent electrode according to claim 1 , wherein each POM of the plurality of POMs is ion paired with an alkali metal cation or a tetraalkylammonium cation.

7 . A method of preparing the porous transparent electrode according to claim 1 , comprising:
providing a substrate comprising a film of semiconducting nanoparticles; contacting film of semiconducting nanoparticles with a solution of the POM to form a porous transparent electrode with a POM bonded surface; and washing residual solution from the porous transparent electrode.

8 . The method according to claim 7 , wherein the semiconducting nanoparticles is ITO, FTO, or TiO 2 .

9 . The method according to claim 7 , wherein the POM comprises [SiW 12 O 40 ] 4− , [α-P 2 W 18 O 62 ] 6− , or [α 2 -P 2 W 17 O 61 ] 10− .

10 . The method according to claim 7 , wherein the solution is an aqueous acid solution or an organic solvent solution.

11 . The method according to claim 10 , wherein the acid of the aqueous acid solution is a perchloric acid.

12 . The method according to claim 10 , wherein the organic solvent of the organic solvent solution is methanol or acetonitrile.

13 . An electrocatalytic device, comprising a porous transparent electrode according to claim 1 , wherein the device performs an electrocatalytic process.

14 . The electrocatalytic device according to claim 13 , wherein the device is a sensor.

15 . The electrocatalytic device according to claim 13 , wherein the electrocatalytic process is the reduction of nitrous acid.

16 . The electrocatalytic device according to claim 13 , wherein the electrocatalytic process is preparation of a high-valence metal ion.

17 . The electrocatalytic device according to claim 13 , wherein the electrocatalytic process is preparation of a high-valence lanthanide or actinide.

18 . The electrocatalytic device according to claim 16 , wherein the high-valence metal ion is Am(IV), Am(V), Am(VI), Ce(IV), Bk(IV), Cf(IV) Cm(IV) or Tb(IV).

19 . The electrocatalytic device according to claim 13 , wherein the device is a photosensitized device.

20 . The electrocatalytic device according to claim 19 , wherein the photosensitized device is a smog abatement device.

Assignees

• Dares Christopher J
• The Florida International Univ Board Of Trustees

Inventors

• Dares Christopher J

Classifications

• C25B9/50

  Cells or assemblies of cells comprising photoelectrodes; Assemblies of constructional parts thereof · CPC title

• C25B1/55 Primary

  Photoelectrolysis · CPC title

• Y02P20/133

  Renewable energy sources, e.g. sunlight · CPC title

• G01N27/305

  optically transparent or photoresponsive electrodes · CPC title

• C25B11/091 Primary

  consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds · CPC title