Web Release Date: January 8,
PtM/C Catalyst Prepared Using Reverse Micelle Method for Oxygen Reduction Reaction in PEM Fuel Cells
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Department of Chemistry, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, Inorganic Chemistry Laboratory, Wolfson Catalysis Center, University of Oxford, OX1, 3QR, U.K., and Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973
Received: June 25, 2007
In Final Form: October 8, 2007
Abstract:
Synthesis of carbon-supported PtM/C catalysts (M = Co, Cr, or Fe) using a new preparation technique, a reverse micelle method, is reported. The catalysts were characterized by different surface techniques: X-ray diffraction, scanning electron microscope, transmission electron microscope, and energy dispersive X-ray microanalysis. Surface characterization showed that Pt/M nanoparticles on catalysts were synthesized using the reverse micelle method. Pt/M nanoparticles were observed to be uniform spherical objects. The performance of the PtM/C catalysts was tested by the rotating disk electrode technique. A trend of catalytic activity for oxygen reduction reaction (ORR) was obtained: PtCo/C(T, 500) ~ PtCo/C(S) > PtCr/C(S) > PtFe/C(S) ~ Pt/C > PtFe/C(T, 500) ~ PtCr/C(T, 500), showing that PtCo/C-type catalysts had a higher catalytic activity for ORR.
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