Journal
JOURNAL OF POWER SOURCES
Volume 195, Issue 7, Pages 1946-1949Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2009.10.009
Keywords
Wormholelike mesoporous carbons; Pt nanoparticles; Pore diameter; Hydrogen electrooxidation
Funding
- Hi-Tech Research and Development Program of China [2009AA05Z110]
- NSFC [50632040, 50802116, 20903122]
- Specialized Research Fund for the Doctoral Program of Higher Education [20070558062, 20080551014]
- Natural Scientific Foundation of Guangdong Province [8451027501001421]
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Pt nanoparticles are successfully deposited on wormholelike mesoporous carbons (WMCs) using a pulse microwave-assisted polyol method. WMCs with two different pore diameters are used. The particle size of Pt on both supports is identical, about 3 nm. It has been found that Pt utilization efficiency is very low when the pore diameter of WMCs (D-p) is equal to the diameter of Pt nanoparticles (D-Pt). However, in the case that D-p is more than twice D-Pt, the electrochemical surface area and Pt utilization efficiency are dramatically enhanced, and in turn, hydrogen electrooxidation activity is greatly improved. (C) 2009 Elsevier B.V. All rights reserved.
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