Enhanced oxygen evolution and reduction reactions of porous ternary NiCoFe foam electrodes prepared by dynamic hydrogen template deposition

► Electrodeposition of NiCoFe nanodendritic foam made at high current density. ► 3D morphology with cauliflower-like particles and open multiscale dendritic structures. ► The composition of the foam is in accordance with that of the electrolyte. ► The achieved NiCoFe foams have a significantly enhanced catalytic activity. ► The foam is promising as bifunctional catalyst in energy conversion and storage devices.