Citation: MEI Su-Juan, WU Jun-Jie, LU Shuang-Long, CAO Xue-Qin, GU Hong-Wei, TANG Ming-Hua. Facile Synthesis of Concave Dendritic PtCu Nanoparticles with Enhanced Methanol Electro-oxidation Activities[J]. Chinese Journal of Inorganic Chemistry, ;2015, (12): 2298-2304. doi: 10.11862/CJIC.2015.317
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Concave dendritic PtCu bimetallic nanocatalysts (PtCu NCDs) was prepared by one-step method in a Teflon-lined stainless steel autoclave with o-phenylenediamine as surface active agent. In the reaction system, o-phenylenediamine plays an important role in initiating, promoting and guiding replacement reaction. The PtCu NCDs exhibited exceptionally high activity and strong poisoning resistance in methanol oxidation reaction (MOR). The mass activity of PtCu NCDs (0.53 A·mg-1 Pt) was 2.04 times higher than that of the commercial Pt/C catalysts (0.26 A·mg-1 Pt) in MOR. The specific activity of PtCu NCDs (1.07 mA·cm-2) was 1.95 times higher than that of the commercial Pt/C catalysts (0.55 mA·cm-2). Moreover, PtCu NCDs (2.76) showed a higher ratio of If/Ib than the commercial Pt/C catalysts (1.02). The enhanced catalytic activity could be owed to the unique concave dendritic morphology of the bimetallic nanoparticles.
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