Journal
ELECTROCHEMICAL AND SOLID STATE LETTERS
Volume 10, Issue 5, Pages F18-F21Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.2713657
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The electrocatalytic reduction of oxygen has been studied on multiwalled carbon nanotube (MWCNT) modified glassy carbon (GC) electrodes in 0.5 M H2SO4 solution using the rotating disk electrode technique. The oxygen reduction behavior of oxidatively pretreated and untreated MWCNT modified GC electrodes was compared. The results obtained indicate that the electrocatalytic properties of untreated MWCNTs toward O-2 reduction in acid media are noticeably better than that of pretreated MWCNTs. This effect is caused by catalyst impurities which remain in the nanotubes prepared by chemical vapor deposition and can be largely removed by treatment in acids. (c) 2007 The Electrochemical Society.
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