Mixed ferrite nanoparticles and uses thereof

Abstract

There are provided nanoparticles useful as Oxygen Evolution Reaction (OER) catalysts. These are nanoparticles of a ferrite of formula MnxCoyNi2Fe3−(x+y+z)O4, wherein each of x, y and z is ≥0 and ≤1, and wherein 0<(x+y+z)<1.5, wherein the ferrite has a spinel crystalline structure, wherein the nanoparticles have a truncated octahedron shape exposing facets, wherein said facets comprise 6 square facets and 8 hexagonal facets, wherein the square facets correspond to the {100} crystal plane and the hexagonal facets correspond to the {111} crystal plane, and wherein the nanoparticles are up to about 500 nm in size. We also provide a catalyst comprising these and the use of these nanoparticles as a catalyst. Are further provided a composition for an electrode and an electrode comprising these nanoparticles. Finally, there is provided an electrolytic cell comprising an electrode comprising the nanoparticles.

Dependencies are inferred from the claim text.