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首页> 外文期刊>Electrocatalysis >PtAu Electrocatalyst for Glycerol Oxidation Reaction Using a ATR-FTIR/Single Direct Alkaline Glycerol/Air Cell In Situ Study
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PtAu Electrocatalyst for Glycerol Oxidation Reaction Using a ATR-FTIR/Single Direct Alkaline Glycerol/Air Cell In Situ Study

机译：使用ATR-FTIR /单直接碱性甘油/空气细胞原位研究的PtAu电催化剂用于甘油氧化反应

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摘要

Different ratios of PtAu/C electrocatalysts were synthesized and assessed for their capability by glycerol electrooxidation. Electrocatalysts were characterized by Xray diffraction (XRD), transmission electron microscopy (TEM), cyclic voltammetry (CV), chronoamperometry, and direct glycerol/air fuel cell coupled with a ATR-FTIR setup. XRD of PtAu/C electrocatalysts showed the presence of Pt (fcc), Au (fcc), and PtAu (fcc) phases, and TEM images for PtAu/C electrocatalysts showed particle size between 5.4 and 5.8 nm. PtAu/C (50: 50) presented the best result for glycerol electrooxidation by cyclic voltammetry and chronoamperommetry measurements in comparison with other electrocatalysts prepared. All PtAu/C showed better performance in comparison with Pt/C and Au/C. Moreover, the addition of gold to platinum favored glycerol by electronic effect and bifunctional mechanism. Through ATR-FTIR/direct alkaline glycerol/air cell in-situ study, it was possible to identify glycerate and tartronate as main products formed during the electrochemical glycerol oxidation.
机译：合成了不同比例的PtAu / C电催化剂，并通过甘油电氧化法评估了它们的能力。通过X射线衍射（XRD），透射电子显微镜（TEM），循环伏安法（CV），计时电流法和直接甘油/空气燃料电池与ATR-FTIR装置相结合来表征电催化剂。 PtAu / C电催化剂的XRD显示存在Pt（fcc），Au（fcc）和PtAu（fcc）相，PtAu / C电催化剂的TEM图像显示粒径在5.4至5.8 nm之间。与制备的其他电催化剂相比，通过循环伏安法和计时安培法测量，PtAu / C（50：50）表现出甘油电氧化的最佳结果。与Pt / C和Au / C相比，所有PtAu / C均表现出更好的性能。此外，通过电子效应和双功能机理，向铂中添加金有利于甘油。通过ATR-FTIR /直接碱性甘油/空气电池的原位研究，有可能鉴定出甘油酸和酒石酸酯是电化学甘油氧化过程中形成的主要产物。

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