Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 12, Issue 9, Pages 1210-1213Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2010.06.021
Keywords
Electrocatalysis; PtRu catalysts; Methanol electrocatalytic oxidation; Stability
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Funding
- Fundamental Research Funds for the Central Universities [2009ZZ0032]
- Guangdong Provincial Natural Science Foundation of China [9251064101020]
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Manganese dioxide was coated on multiwall carbon nanotubes-supported PtRu particles to prepare the MnO2/PtRu/CNT catalyst by a facile oxidation-reduction method. The prepared catalyst showed a high stability for electrocatalytic oxidation of methanol. After 2000 potential cycles, 55% activity still remained for MnO2/PtRu/CNT catalyst, while only 30% activity remained for PtRu/CNT, which indicated that the electrochemical stability of MnO2/PtRu/CNTs was improved significantly. MnO2 in MnO2/PtRu/CNTs prevented the dissolution of PtRu particles as well as the corrosion of the CNT supports, resulting in the improvement of the stability and activity. (C) 2010 Elsevier B.V. All rights reserved.
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