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Wormholelike mesoporous carbons as the support for Pt2Sn1 towards ethanol electrooxidation: Effect of pore diameter
- Source :
-
International Journal of Hydrogen Energy . Feb2011, Vol. 36 Issue 3, p2250-2257. 8p. - Publication Year :
- 2011
-
Abstract
- Abstract: Pt2Sn1 nanoparticles supported on wormholelike mesoporous carbons (WMCs) with three different pore diameters, namely WMC-F7, WMC-F30, and WMC-F0 have been synthesized by adopting a modified pulse microwave-assisted polyol method. The pore diameters (Dp) of WMC-F7, WMC-F30, and WMC-F0 are 8.5 nm, 4.4 nm, and 3.1 nm respectively, while the particle size of Pt2Sn1 (DPt) on each support is identical (∼3 nm). Based on the experimental results, it has been found that the pore diameter plays an important role in the electrochemical activity of Pt2Sn1 catalysts towards ethanol electrooxidation reaction (EOR). Pt2Sn1/WMC-F7 catalyst exhibits the highest electrochemical surface area (ESA) and activity towards EOR. Moreover, Pt2Sn1/WMC-F7 gives the comparable activity to the Pt2Sn1 supported on the commercial XC-72 carbon. However, in the cases of WMC-F30 (DPt < Dp < 2 DPt) and WMC-F0 (Dp = DPt) as the supports, the corresponding catalysts obtain much lower ESA and EOR activity with respect to WMC-F7 (Dp > 2 DPt). This could be attributed to the easy accessibility of Pt2Sn1 nanoparticles in the case of WMC-F7 with Dp > 2 DPt for the easy fuel transportation, and consequently the EOR activity has been greatly improved. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 36
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 57953725
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2010.11.086