Metal-Salen metal organic framework supported single-metal site electrocatalysts for oxygen evolution reaction.

Metal-organic frameworks (MOFs) are emerging as versatile platforms for supporting isolated single-site catalysts due to their privileged structural designability and uniformity, have received special attention in electrocatalytic applications. Herein, a novel pyrazole-type nickel (Ni)-Salen based MOF has been constructed via an incompletely linked self-assembled form, as determined by the single-crystal X-ray diffraction. The ring-opening tetradentate metal nitrogen‑oxygen (MNO) structure in above MOF features strong chelating coordination and accessible open metal sites, strongly implying its enormous potential as single-metal site electrocatalysts.