Synthesis of Zn0.3Co2.7O4 porous willow-leaf like structure for enhanced electrocatalytic oxygen evolution reaction

Abstract A porous Zn 0.3 Co 2.7 O 4 willow-leaf like structure was obtained with an annealing treatment with the acetate hydrate precursor. The morphology and structure of precursor and porous Zn 0.3 Co 2.7 O 4 material was well characterized. The as-prepared Zn 0.3 Co 2.7 O 4 exhibited good electrocatalytic oxygen evolution reaction (OER) performance with an overpotential of 389 mV at the benchmark of a current density of 10 mA/cm 2 , a low Tafel slope of 61.57 mV/dec and a negligible increase of the overpotential during the stability test of 7200 s.