Fig. 3: Electrochemical activation (EA) of CoN@CNTs.
From: Direct insights into the role of epoxy groups on cobalt sites for acidic H2O2 production
XPS O 1s spectra of a aged CoN@CNTs, b EO-CoN@CNTs and c EA-CoN@CNTs. d Background-corrected FTIR spectra of CoN@CNTs before and after ETs. e RRDE voltammograms of CoN@CNTs after EA (including EO and then ER) at 1600 rpm in an O2-saturated 0.1 M HClO4 electrolyte with disc current and ring current. f Calculated H2O2 selectivity on CoN@CNTs, aged CoN@CNTs and EA-CoN@CNTs based on the RRDE measurements. g H2O2 production amount (determined via the potassium permanganate titration) as a function of time on the EA-CoN@CNTs. Current (red curve) and concentration (blue ○) behavior with time for the electrochemical H2O2 production is shown.
