Abstract
The Pt–Cu alloy/C (AC-PtCu-4/C) with uniform nanoparticles and high density of surface defects was synthesized by the microwave-polyol technique following acid-treatment. The AC-PtCu-4/C contained much higher density of surface defects than did the commercial Pt/C. Electrochemical characterization demonstrated that the AC-PtCu-4/C exhibited mass activity and surface activity 4.8 and 3.9 times higher than those of Pt/C for ethanol oxidation. Moreover, the AC-PtCu-4/C can enhance the C–C bond cleavage of ethanol to generate CO2 2.47 times more than that of Pt/C under the same conditions, as evidenced by in situ FTIR reflection spectroscopy.
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