The invention discloses a preparation method of a
spinel type
oxide catalyst. One or two transition metals of
cobalt, iron,
nickel,
manganese,
copper,
chromium and
zinc and aluminum are jointly heatedto a
molten state by adopting a
vacuum induction melting furnace, cooling is performed to obtain a rod-shaped
alloy ingot, a vacuum melt-
spinning device is employed for melting for blow
casting intoa corresponding
alloy strip, carrying out dealloying treatment on the
alloy strip in an alkaline solution to obtain a dealloyed product, and in order to improve the
crystallinity and stability of thematerial, the dealloyed product is placed in a tubular furnace for high-temperature annealing treatment in an
air atmosphere, thus obtaining the
spinel type
oxide catalyst. The invention also relatesto application of the
electrode material. The obtained catalyst has a multi-
metal mixed valence state, can significantly enhance the
conductivity of the material, shows good electrocatalytic activityto
oxygen evolution reaction (OER) and
oxygen reduction reaction (ORR) in an alkaline environment, has good stability, and can be used as a
cathode catalyst of a chargeable and dischargeable
metal-airbattery.