Affiliation:
1. Materials Research and Technology Department, Luxembourg Luxembourg Institute of Science and Technology 28 Avenue des Hauts-Fourneaux Esch-sur-Alzette 4362 Luxembourg
2. Doctoral School in Science and Engineering University of Luxembourg 2 Avenue de l'Université Esch-sur-Alzette 4362 Luxembourg
Abstract
AbstractThe development of highly conjugated metalloporphyrin assemblies is a crucial step to improve their catalytic activity for optimal energy conversion processes. Herein, di‐thienyl substituted nickel(II) porphyrin is used to form a highly conjugated porphyrin structure. The resulting porphyrin‐based conjugated polymer catalyst exhibited exceptional oxygen evolution reaction “OER” performances, featuring a low onset overpotential of 266 mV and high reaction kinetics (Tafel slope of 69.9 mV/dec) under alkaline pH conditions, achieving a current density of 4.5 mA/cm2. The remarkable OER catalytic activity of porphyrin‐based conjugated polymer catalyst is attributed to the enhancement of the conjugation, which occurs through a unique process involving direct fusion of the porphyrins followed by thienyl bridging of the fused porphyrin tapes, ultimately leading to the establishment of a highly cross‐linked porphyrinic network.