Ultrathin Fan-like Multimetallic Oxide as A Superior Oxygen Evolution Electrocatalyst in Alkaline Water and Seawater

(https://doi.org/10.1016/j.ijhydene.2023.03.337)

Atomically thin quinary CNWFVO_x (CoNiWFeVO_x) amorphous ultrathin fan-like nanobelts were successfully synthesized by a simple colloidal chemistry strategy for electrocatalytic OER in alkaline water and seawater. The catalyst required only low overpotentials of 245 mV and 272 mV to achieve a current density of 10 mA cm^-2 under alkaline conditions and simulated seawater, respectively, even better than commercial RuO₂, and the electrode activity remained almost constant after more than 80 h of stability testing. The superior catalytic performance may be attributed to the unique amorphous ultrathin structure conferring a larger active surface area and the modulation of the electronic environment by the synergistic interaction between multiple components.