Fig. 2: Oxygen reduction performance of CoN@CNTs.
From: Direct insights into the role of epoxy groups on cobalt sites for acidic H2O2 production

a RRDE voltammograms of CoN@CNTs and NG at 1600 rpm in an O2-saturated 0.1 M HClO4 electrolyte with disc current and ring current. b RRDE voltammograms of fresh and aged CoN@CNTs at 1600 rpm in an O2-saturated 0.1 M HClO4 electrolyte with disc current and ring current. All potentials are recorded without iR correction. c XPS elemental survey of CoN@CNTs and aged CoN@CNTs. d XPS O 1s spectra of CoN@CNTs and aged CoN@CNTs.