Chrysanthemum-like spinel nanomaterials assembled with bundled nanowires as an efficient catalyst for the oxygen evolution reaction

Spinel oxides are mounted on nickel foam to form chrysanthemum-like crystal structures assembled from nanowires. The as-synthesized CuCo 2 O 4 –Co 3 O 4 /NF shows a high surface area, a large number of mesoporous structures and excellent charge transfer channels.