【摘要】 制备并比较了Pt/C和Pt-WO3/C催化剂对乙醇的电化学氧化活性.发现无论是在酸性溶液中还是中性溶液中,Pt-WO3/C电极对乙醇氧化的电催化活性都比在Pt/C电极上高.这是由于WO3能提供乙醇在Pt上氧化所需的含氧物种,此外WO3能在较低电位下使乙醇氧化的中间产物CO氧化除去,从而提高了催化剂对乙醇氧化的催化活性.更多还原

【Abstract】 Electrooxidation behavior of ethanol at the Pt-WO₃/C and Pt/C electrodes was investigated by LSV techniques.It was found that the electrocatalytic activity of the Pt-WO₃/C electrode for electrooxidation of ethanol is higher than that of the Pt/C electrode either in acidic and neutral solutions.The good behavior at the Pt-WO₃/C electrode for ethanol electrooxidation is due to that WO₃ could supply the oxygen-containing species necessary for the electrooxidation of ethanol.The experimental results also show that Pt-WO₃/C electrode can promote the CO_ad electrooxidation.CO_ad is believed to be the intermediate of ethanol oxidation and the main poison of Pt catalyst.CO_adcan be electrooxidated at lower potential at Pt-WO₃/C than at Pt/C electrode and can be removed from the surface of(Pt-WO₃/C) electrode more easily.更多还原