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PtM/C Catalyst Prepared Using Reverse Micelle Method for Oxygen Reduction Reaction in PEM Fuel Cells

2008; American Chemical Society; Volume: 112; Issue: 4 Linguagem: Inglês

10.1021/jp074929i

1932-7455

Yangdong Qian, WEN WEN, Peter A. Adcock, Zheng Jiang, Nazih Hakim, Madhu Sudan Saha, Sanjeev Mukerjee,

Molecular Junctions and Nanostructures

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.