Activity changes of glassy carbon electrodes caused by their exposure to OH• radicals

GC electrodes were exposed to Fenton solutions. The surface changes produced by the OH• radicals of these solution were inspected using SEM, XPS, Raman spectroscopy and electrochemistry. The OH• radicals caused erosion and roughening of the surface, selective oxidation and dissolution of sp2 carbon, and reduction of the number of nucleation sites for silver deposition.