CoNiP/NC polyhedrons derived from cobalt-based zeolitic imidazolate frameworks as an active electrocatalyst for oxygen evolution

Schematic diagram to illustrate the OER catalytic principles on CoNiP/NC polyhedrons. Step I: transformation of ZIF-67 into CoNi/NC by a facile etching and deposition process and carbonization; Step II: formation of CoNiP/NC by phosphatizing CoNi/NC.