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首页> 外文期刊>RSC Advances >Carbon supported Pt-Sn/SnO2 anode catalyst for direct ethanol fuel cells
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Carbon supported Pt-Sn/SnO2 anode catalyst for direct ethanol fuel cells

机译：用于直接乙醇燃料电池的碳载Pt-Sn / SnO2阳极催化剂

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摘要

Binary Pt-Sn/SnO2-C electro-catalysts comprising Pt and Sn in varying weight ratio, namely 31 : 9, 33 : 7 and 35 : 5, were synthesized by an alcohol-reduction process using ethylene glycol as solvent and reducing agent. The electro-catalysts were characterized by XRD, XPS, TEM, SEM-EDAX, ICP-OES, Cyclic Voltammetry (CV), chronoamperometry and CO stripping techniques. XRD spectra reveal shifting of Pt diffraction peaks to lower angles with the addition of Sn compared with Pt-C and also the presence of SnO2. XPS results also confirm the presence of Sn in the form of PtSn alloy and in the form of SnO2 phase in the catalyst. The effect of composition towards electro-oxidation of ethanol has been studied by the CV technique. The direct ethanol fuel cells (DEFCs) with Pt-Sn/SnO2-C anode catalyst with reduced Pt loading exhibits an enhanced peak power density of 27.0 mW cm(-2) while a peak power-density of only 2.2 mW cm(-2) is obtained for the DEFC employing Pt-C at 90 degrees C.
机译：通过使用乙二醇作为溶剂和还原剂的醇还原法合成了重量比分别为31：9、33：7和35：5的Pt和Sn的二元Pt-Sn / SnO2-C电催化剂。通过XRD，XPS，TEM，SEM-EDAX，ICP-OES，循环伏安法（CV），计时安培法和CO汽提技术对电催化剂进行了表征。 XRD光谱显示，与Pt-C相比，与Sn相比，添加Sn时Pt衍射峰向较低角度移动。 XPS结果还证实了催化剂中以PtSn合金形式和SnO2相形式存在Sn。已经通过CV技术研究了组合物对乙醇的电氧化的影响。具有减少的Pt负载的Pt-Sn / SnO2-C阳极催化剂的直接乙醇燃料电池（DEFC）表现出增强的27.0 mW cm（-2）的峰值功率密度，而峰值功率密度仅为2.2 mW cm（-2）对于在90摄氏度下采用Pt-C的DEFC获得）。

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