We report graphene nanoplatelets (GNP), which exhibit the advantages of both single-layer graphene and highly graphitic carbon, as a durable alternative support material for Pt nanoparticles for oxygen reduction in fuel cells. Pt nanoparticles are deposited on poly(diallyldimethylammonium chloride)(PDDA)-coated GNP, and characterized with transmission electron microscopy, X-ray diffraction, Raman spectra, and electrochemical tests. Pt/GNP exhibits greatly enhanced electrochemical durability (2-3 times that of Pt/CNT and commercial Etek Pt/C). These are attributed to the intrinsic high graphitization degree of GNP and the enhanced Pt-carbon interaction in Pt/GNP. If considering that GNP can be easily mass produced from graphite, GNP is a promising, low-cost, and durable electrocatalyst support for oxygen reduction in fuel cells.
Revised: July 2, 2010 |
Published: June 1, 2010
Citation
Shao Y., S. Zhang, C.M. Wang, Z. Nie, J. Liu, Y. Wang, and Y. Lin. 2010.Highly durable graphene nanoplatelets supported Pt nanocatalysts for oxygen reduction.Journal of Power Sources 195, no. 15:4600-4605.PNNL-SA-69731.