ELECTROCHEMICAL PRODUCTION OF NANOSCALE METAL (MIXED) OXIDES

WIPO Patent Application WO2002061183

A3

The invention relates to a method for producing amorphous and/or crystalline metal (mixed) oxides, especially metals of the third to fifth main group or subgroups of the periodic table, the mean particle diameters of the (mixed) oxides being between 1 and 500 nm, especially between 1 and 100 nm. The ions of the metal(s) from which the (mixed) oxide is to be produced and which are dissolved in an organic electrolyte are electrochemically reduced on a cathode in an electrolysis device fitted with a cathode and an anode, in the presence of an oxidation agent. The cathode space (cathode half-cell) and anode space (anode half-cell) are separated by a porous separating wall or barrier (diaphragm) which enables the passage of a flow, i.e. which is permeable to cations and anions, but renders difficult, especially prevents, the passage of elementary halogens from the anode space to the cathode space.

NATTER HARALD (DE)
DIERSTEIN ANDREA (DE)
HEMPELMANN ROLF (DE)
STEPHAN HANS-OSCAR (DE)
KROPF CHRISTIAN (DE)

PCT/EP2002/000826

December 27, 2002

January 26, 2002

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HENKEL KGAA (DE)
NATTER HARALD (DE)
DIERSTEIN ANDREA (DE)
HEMPELMANN ROLF (DE)
STEPHAN HANS-OSCAR (DE)
KROPF CHRISTIAN (DE)

C25B1/00; (IPC1-7): C25B1/00

DE19840842A1	2000-03-09
US5286354A	1994-02-15
US5116468A	1992-05-26
US4067788A	1978-01-10

DATABASE COMPENDEX [online] ENGINEERING INFORMATION, INC., NEW YORK, NY, US; ZOTTI GIANNI ET AL: "Anodic dissolution of titanium in acetonitrile to Ti(IV) perchlorate and subsequent reductive electrodeposition of amorphous TiO2 films", XP002206852, Database accession no. EIX99224611552

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