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Electrochemical reduction of oxygen on double-walled carbon nanotube modified glassy carbon electrodes in acid and alkaline solutions |
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| Authors: | Ivar Kruusenberg Leonard Matisen Hua Jiang Maija Huuppola Kyösti Kontturi Kaido Tammeveski |
| Affiliation: | 1. Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia;2. Institute of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia;3. Department of Applied Physics, Aalto University, P.O. Box 15100, FIN-00076 Aalto, Finland;4. Department of Chemistry, Aalto University, P.O. Box 16100, FIN-00076 Aalto, Finland |
| Abstract: | The oxygen reduction reaction has been investigated on double-walled carbon nanotube (DWCNT) modified glassy carbon (GC) electrodes in acid and alkaline media using the rotating disk electrode (RDE) method. The surface morphology and composition of DWCNT samples was examined by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Aqueous suspensions of DWCNTs were prepared using Nafion and non-ionic surfactant Triton X-100 as dispersing agents. The RDE results indicated that the DWCNT modified GC electrodes are active catalysts for oxygen reduction in alkaline solution. In acid media DWCNT/GC electrodes possess poor electrocatalytic properties for O2 reduction which indicates lack of metal catalyst impurities in the DWCNT material studied. The oxygen reduction behaviour of DWCNTs was similar to that of multi-walled carbon nanotubes (MWCNTs) observed in our previous studies. |
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