EP 3674445 C0 20240417 - AN ELECTROCHEMICAL PROCESS FOR PRODUCING NANOPARTICLESOF CUPRATE HYDROXYCHLORIDES
Title (en)
AN ELECTROCHEMICAL PROCESS FOR PRODUCING NANOPARTICLESOF CUPRATE HYDROXYCHLORIDES
Title (de)
ELEKTROCHEMISCHES VERFAHREN ZUR HERSTELLUNG VON NANOPARTIKELN VON CUPRAT-HYDROXYCHLORIDEN
Title (fr)
PROCÉDÉ ÉLECTROCHIMIQUE DE PRODUCTION DE NANOPARTICULES D'HYDROXYCHLORURES DE CUPRATE
Publication
Application
Priority
EP 18248090 A 20181227
Abstract (en)
[origin: EP3674445A1] The present invention relates to an electrochemical process for producing nanoparticles of mixed copper hydroxide-chloride compounds responding to the chemical formula M<sub>x</sub>Cu<sub>4-x</sub>(OH)<sub>y</sub>Cl<sub>z</sub>wherein M is one or more metal cations from the group comprising a divalent earth alkali metal cation, a divalent transition metal cation or a trivalent transition metal cation, and wherein 0 ≤ x ≤ 1, 5.5 ≤ y ≤ 6.5 and 1.5 ≤ z ≤ 3, the method comprising the steps of(1) supplying to a cathode compartment of an electrochemical cell, wherein the cathode compartment comprises a catholyte and is equipped with a cathode comprising a gas diffusion electrode with a porous electrochemically active material, a liquid water based mixture containing dissolved therein Cl<sup>-</sup>ions, at least one precursor salt containing the one or more metal cations M, and at least one Cu<sup>2+</sup>precursor salt, wherein the ratio of the concentration of Cu<sup>2+</sup>to M is smaller than 10:1,(2) adjusting the pH of the reaction mixture to a value between 2.0 and 6.0,(3) supplying an O<sub>2</sub>containing oxidant gas to the gas diffusion electrode,(4) subjecting the cathode to an electrochemical potential which is below the thermodynamic limit of O<sub>2</sub>reduction at the pH of the reaction mixture,(5) applying a potential to the gas diffusion electrode to cause reduction of the O<sub>2</sub>contained in the oxidant gas to one or more of the corresponding peroxide, OH<sup>-</sup>, ionic and/or radical reactive O containing species,and isolating nanoparticles of M<sub>x</sub>Cu<sub>4-x</sub>(OH)<sub>y</sub>Cl<sub>z</sub>.
IPC 8 full level
C25B 1/30 (2006.01); C25B 1/01 (2021.01); C25B 9/19 (2021.01); C25B 13/08 (2006.01)
CPC (source: EP)
C25B 1/01 (2021.01); C25B 1/30 (2013.01); C25B 9/19 (2021.01); C25B 11/032 (2021.01); C25B 13/07 (2021.01); C25B 13/08 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Participating member state (EPC – UP)
AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI
DOCDB simple family (publication)
EP 3674445 A1 20200701; EP 3674445 B1 20240417; EP 3674445 C0 20240417
DOCDB simple family (application)
EP 18248090 A 20181227