Polyoxometalate derivatized metal oxide electrodes

Patent metadata

Field	Value
Publication number	US-11725293-B2
Application number	US-201916599555-A
Country	US
Kind code	B2
Filing date	Oct 11, 2019
Priority date	Oct 11, 2019
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

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 (TiO2). In an embodiment, the POM is [SiW12O40]4−; [α-P2W18O62]6−; or [α2-P2W17O61]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

I claim:

1. An electrocatalytic device, comprising:
a porous transparent electrode disposed in a solution,
the 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 porous transparent electrode being derivatized with a photosensitizer to form a layered structure,
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,
the plurality of POMs being electrocatalysts for forming a high-valence metal ion,
the high-valence metal ion being Am(V), Am(VI), Bk(IV), Cf(IV), Cm(IV), or Tb(IV), and
the solution further comprising reactants for forming the high-valence metal ion.

2. The electrocatalytic device according to claim 1 , wherein the semiconducting nanoparticles comprise tin-doped indium oxide (ITO), fluorine-doped tin oxide (FTO), or titanium dioxide (TiO 2 ).

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

4. The electrocatalytic device according to claim 1 , wherein each POM of the plurality of POMs is in a protonated form.

5. The electrocatalytic device according to claim 1 , wherein each POM of the plurality of POMs is ion paired with an alkali metal cation or a tetraalkylammonium cation.

6. The electrocatalytic device according to claim 1 , the high-valence metal ion being Am(V) or Am(VI).

7. The electrocatalytic device according to claim 1 , the photosensitizer being RuP 2+ .

Assignees

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

Inventors

• Dares Christopher J

Classifications

• 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

• C25B1/55 Primary

  Photoelectrolysis · CPC title

• C25C1/22

  of metals not provided for in groups C25C1/02 - C25C1/20 · CPC title

• C25C7/02

  Electrodes (consumable anodes for the refining the metals C25C1/00 - C25C5/00); Connections thereof · CPC title

• G01N27/305

  optically transparent or photoresponsive electrodes · CPC title