Citation: SUN Hong-Yan, ZHAO Lian-Hua, Yu Feng-Chun. Preparation and Characterization of Pt-Ir-SnO2/C Anode Catalyst for Direct Ethanol Fuel Cell[J]. Acta Physico-Chimica Sinica, ;2013, 29(05): 959-965. doi: 10.3866/PKU.WHXB201303042
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Pt/C, Pt-Ir/C, Pt-SnO2/C, and Pt-Ir-SnO2/C anode electrocatalysts were prepared by an improved Bo? nnemann method. The crystal structure, surface morphology, particle size, and surface electronic structure were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). XRD and TEM revealed that Pt nanoparticles had a face-centered cubic structure, and that dispersions were relatively homogeneous with particle sizes of 2-4 nm. Electrocatalytic activities were characterized using linear sweep voltammetry (LSV), cyclic voltammetry (CV), and amperometric (j-t) curve techniques. Catalytic performance improved with increasing temperature, and catalytic activity of Pt-Ir-SnO2/C was optimal under these conditions. Arrhenius formula calculations showed that the synergy between Ir and Sn reduced the activation energy of Pt-Ir-SnO2/C catalysts for the oxidation of ethanol.
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