Electrochemical oxygen evolution reaction of controllable self-assembled CuCo2O4

CuCo 2 O 4 is ascribed to the effective OER catalysts due to its different oxidation states and high active sites. In this paper, CuCo 2 O 4 catalysts with different micromorphologies are synthesized by using urea and ammonium fluoride, which can affect the nucleation ability of compounds. The OER catalytic performance of CuCo 2 O 4 /NF catalyst has been greatly improved with the synergistic effect of urea and ammonium fluoride. The CCNO-3 sample owns a small overpotential of 198 mV at 10 mA cm −2 and that of 309 mV at 20 mA cm −2 . After 14 h of long cycle, the CuCo 2 O 4 /NF catalyst also presents stability under the synergistic effect of urea and ammonium fluoride.