Ernst, SvenSvenErnstLEIGH ALDOUSCompton, Richard G.Richard G.Compton2024-09-182024-09-182011https://www.scopus.com/record/display.uri?eid=2-s2.0-81755185474&origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/721074The reduction of oxygen on boron-doped diamond (BDD) and glassy carbon (GC) electrodes was studied in the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C2mim][NTf2]. O 2 reduction at both electrodes was found to involve the 1e - reduction of oxygen to superoxide. The formation of superoxide was verified by repeating the oxygen reduction on BDD in the presence of benzoic acid, resulting in a shift from the 1e- reduction observed in the absence of benzoic acid to a 2e- reduction yielding the hydroperoxyl anion. The reduction of O2 was found to be quasi-reversible on GC and irreversible on BDD. The significantly slower kinetics observed on the BDD electrode are likely due to the lower electronic density of states in BDD. © 2011 Elsevier B.V. All rights reserved.Boron-doped diamondCyclic voltammetryGlassy carbonIonic liquidsOxygen reductionSuperoxidejournal article10.1016/j.jelechem.2011.10.0042-s2.0-81755185474