Thin-film rotating disk electrode (TF-RDE) setup -While the ADTs have been performed in the HT-DE setup, oxygen reduction reaction (ORR) polarization curves and COelectrooxidation cyclovoltammograms (CVs) both before as well as after the ADT have been measured in a typical TF-RDE setup also in accordance to our previous work. Electrochemical measurements have been conducted with a SP-200 Potentiostat (Biologic) in a two-compartment electrochemical cell in a 0.1 M HClO4 electrolyte with a conventional three-electrode system. Similarly, a reversible hydrogen electrode (HydroFlex®) has been used