Three-dimensional Ni foam supported NiCoO2@Co3O4 nanowire-on-nanosheet arrays with rich oxygen vacancies as superior bifunctional catalytic electrodes for overall water splitting

Three-dimensional NiCoO 2 @Co 3 O 4 nanowire-on-nanosheet arrays with rich oxygen vacancies were synthesized and adopted as bifunctional electrodes, showing excellent water splitting performance.