Creating coordinatively unsaturated metal sites in metal-organic-frameworks as efficient electrocatalysts for the oxygen evolution reaction: Insights into the active centers

Coordinatively Unsaturated Metal Sites (CUMSs) in ZIF-67 were formed through dielectric barrier discharge (DBD) plasma etching. The CUMSs act as excellent catalytic centers for OER with a promising electrocatalytic activity. Interestingly, the OER activity of the CUMSs is reversible by supplementing the missing ligands. Our density-functional theory calculations also demonstrated the contribution of the unsaturated metal sites to the high catalytic activity for OER.214