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    A PROCESS FOR PRODUCING MIXED METAL OXIDES AND HYDROXIDES
    81.
    发明公开
    A PROCESS FOR PRODUCING MIXED METAL OXIDES AND HYDROXIDES 审中-公开

    公开(公告)号：EP3792376A1

    公开(公告)日：2021-03-17

    申请号：EP19020520.3

    申请日：2019-09-10

    Applicant: VITO NV ,  Katholieke Universiteit Leuven, K.U.Leuven R&D

    Inventor： Patro, Modestino Rafael Alberto ,  Dominguez-Benetton, Xochitl ,  Elisabet, Andres Garcia ,  Fransaer, Jan

    IPC: C25B1/21

    Abstract: An electrochemical process for producing crystalline nanoparticles of a mixed metal oxide, mixed metal hydroxide or mixed metal oxide hydroxide reaction product containing at least a first and a second metal ion which are different from each other, the method comprising the steps of
    (1) supplying to a cathode compartment of an electrochemical cell equipped with a gas diffusion cathode, a liquid feed electrolyte solution containing a first precursor salt of the first metal ion in a first concentration and a second precursor salt of the second metal ion in a second concentration to obtain a reaction mixture;
    (2) supplying an O 2 containing oxidant gas to the cathode,
    (3) subjecting the cathode to an electrochemical potential which is below the thermodynamic limit of O 2 reduction at the pH of the reaction mixture,
    (4) applying a potential to the electrode to cause reduction of the O 2 contained in the oxidant gas to one or more of the corresponding peroxide, OH - , ionic and/or radical reactive O containing species,
    (5) wherein a ratio R Q of charge Q applied to the cathode relative to the sum of the individual concentrations of the at least one first and second metal ion ([M 1 ] + [M2]) ranges between 100 and 1500 C/mmol, wherein [M 1 ] is the concentration of the first metal ion in the reaction mixture and [M2] is the concentration of the second metal ion in the reaction mixture, and isolating nanoparticles of the reaction product.

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