PROCESS FOR PRODUCING A CARBON-SUPPORTED NICKEL-COBALT-OXIDE CATALYST AND ITS USE IN RECHARGEABLE ELECTROCHEMICAL METAL-OXYGEN CELLS

摘要

The present invention relates to a process for producing carbon-supported nickel-cobalt-oxide catalysts, to carbon-supported nickel-cobalt-oxide catalysts obtainable or obtained by the process according to the invention, to gas diffusion electrodes comprising said carbon-supported nickel-cobalt-oxide catalysts and to electrochemical cells comprising said gas diffusion electrodes.

主权项

1. A process for producing a carbon-supported nickel-cobalt-oxide catalyst comprising
(A) carbon in an electrically conductive polymorph, and (B) a nickel-cobalt-oxide of formula (I):
NixCo3-xO4   (I), wherein x is in the range from 0.5 to 2.0.the process comprising:
evaporating solvents contained in (a) preparation of an aqueous suspension comprising
(A) carbon in an electrically conductive polymorph,(B1) a at 1 st one Ni(II) salt,(B2) a at 1 st one Co(II) salt and(C) a at least one chelating ligand, to obtain a solid (S) comprising the components (A), (B1), (B2) and (C); and calcinating the solid (S) in the presence of oxygen in a temperature range from 250° C. to 350° C., to form a carbon-supporting nickel-cobalt-oxide catalyst.