Study of Electrocatalytic Properties of Metal-Organic Framework PCN-223 for the Oxygen Reduction Reaction

A highly robust metal-organic framework (MOF) constructed from Zr₆ oxo clusters and Fe(III) porphyrin linkers, PCN-223-Fe was investigated as a heterogeneous catalyst for oxygen reduction reaction (ORR). Films of the framework were grown on a conductive FTO substrate and showed a high catalytic current upon application of cathodic potentials and achieved high H₂O/H₂O₂ selectivity. In addition, the effect of the proton source on the catalytic performance was also investigated.