• the promotional effect of ni on bimetallic ptni/c catalysts for glycerol electrooxidation

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1059
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the electrocatalytic oxidation of glycerol was studied using carbon-supported 20 wt.% ptni (ptni/c) catalysts, which were prepared with different pt:ni atomic ratios from 3:1 to 1:1 using a colloidal method combined with a freeze-drying procedure. the bimetallic ptni/c catalysts were characterized by various physicochemical analyses, including x-ray diffraction (xrd), transmission electron microscopy (tem), energy dispersive x-ray spectroscopy (eds), inductively coupled plasma-atomic emission spectroscopy (icp-aes), and x-ray photoelectron spectroscopy (xps). cyclic voltammetry (cv) measurements indicated that the addition of ni with a pt catalyst significantly improved the electrocatalytic activity for glycerol electrooxidation. among the tested catalysts, the pt2ni1/c catalyst had approximately 61% higher mass activity than the pt/c catalyst. structural modification via lattice parameter change and electronic modification in the unfilled d band states for pt atoms may kinetically facilitate the electrooxidation of glycerol with an increased exchange current density over the ptni/c catalysts.

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