Journal
ELECTROCHIMICA ACTA
Volume 132, Issue -, Pages 239-243Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.03.150
Keywords
Cyclic voltammogram; Electrocatalysis; MnO2 nanosheets; Oxygen reduction reaction; Rotating disk electrode
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Funding
- National Hi-Technology Development 863 Program of China [2011AA060907]
- Hefei Center for Physical Science and Technology [2012FXZY005]
- Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China
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In this study, a novel layered manganese oxide (MnO2) nanosheets was prepared by using a facile method with graphene oxide as the template, and its electrocatalytic performance was studied. The results of cyclic voltammograms (CV) and the rotating disk electrode (RDE) measurements show that the MnO2 nanosheets possess excellent electrocatalytic activity for oxygen reduction reaction (ORR) in alkaline medium. The electron transfer number of the nanosheets electrode was measured to be 3.4, which lied between the two-electron and four-electron processes, suggesting that the oxygen reduction on nanosheets might proceed by a coexisting pathway involving the two-electron and four-electron transfer. (C) 2014 Elsevier Ltd. All rights reserved.
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