Free‐Base Octaethylporphyrin on Au(111) as Heterogeneous Organic Molecular Electrocatalyst for Oxygen Reduction Reaction in Acid Media: An Electrochemical Scanning Tunneling Microscopy and Rotating Ring‐Disc Electrode Analyses. - Cazzadori, Francesco; Facchin, Alessandro; Reginato, Silvio; Forrer, Daniel; Durante, Christian (Small Science, 2025)