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Convenient immobilization of Pt-Sn bimetallic catalysts on nitrogen-doped carbon nanotubes for direct alcohol electrocatalytic oxidation.
- Source :
- Nanotechnology; Sep2011, Vol. 22 Issue 39, p395401-395401, 1p
- Publication Year :
- 2011
-
Abstract
- Pt-Sn alloy nanoparticles were conveniently immobilized on nitrogen-doped carbon nanotubes (NCNTs) through microwave-assisted ethylene glycol reduction. The nanoparticles have a narrow particle size distribution with the average particle size around 3 nm as measured by transmission electron microscopy and x-ray diffraction. The binding energy of metallic Sn passively shifts due to the charge transfer from Sn to Pt, as revealed by x-ray photoelectron spectroscopy. In comparison with the commercial Pt/C catalyst, Pt/NCNT presents a clear increase in activity for alcohol electro-oxidation due to the improved support, while the bimetallic Pt-Sn/NCNT has even higher activity owing to the alloying of Pt with Sn. Both Pt-Sn/NCNT and Pt/NCNT catalysts exhibit competitive long-term stability to Pt/C catalyst. The low cost, simple preparation and superior electrocatalytic performance indicate the great potential of Pt-Sn/NCNT in direct alcohol fuel cells. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09574484
- Volume :
- 22
- Issue :
- 39
- Database :
- Complementary Index
- Journal :
- Nanotechnology
- Publication Type :
- Academic Journal
- Accession number :
- 65259504
- Full Text :
- https://doi.org/10.1088/0957-4484/22/39/395401