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首页> 外文期刊>International Journal of Electrochemical Science >Carbon Supported Mono- and Bi-Metallic Dispersed Thin Film Catalysts for Oxygen Electro-Reduction Reaction in Acid Medium
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Carbon Supported Mono- and Bi-Metallic Dispersed Thin Film Catalysts for Oxygen Electro-Reduction Reaction in Acid Medium

机译：碳载单金属和双金属分散的薄膜催化剂在酸性介质中进行氧电还原反应

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摘要

The present study reports the use of mono- and binary-metal thin film deposits of Pt, Cu, Ru and Pd dispersed over carbon electrode as electro-catalysts for oxygen reduction. The metals are sequentially electrodeposited on the carbon electrode from their aqueous solutions using the potentiostatic technique. The electrode surface characterization was carried out by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersed X-ray (EDX). The micrographs of SEM analyses showed that the thin films of the various deposits are located at the electrode surface in the nano-scale range. Linear sweep voltammetry was used to investigate the electrode performance towards oxygen reduction in H2SO4 solution in the absence and presence of H2O2. The results indicated that metal deposits and platinum-metal modified carbon electrodes have shown superior electro-catalytic activity toward oxygen reduction reaction (ORR) as shown by the relative increase in the peak current density values of oxygen reduction.
机译：本研究报告了分散在碳电极上的Pt，Cu，Ru和Pd的单金属和二元金属薄膜沉积物用作还原氧的电催化剂。使用恒电位技术将金属从其水溶液中依次电沉积在碳电极上。通过扫描电子显微镜（SEM），X射线衍射（XRD）和能量分散X射线（EDX）进行电极表面表征。 SEM分析的显微照片显示，各种沉积物的薄膜位于纳米级范围内的电极表面。使用线性扫描伏安法研究在不存在和存在H2O2的情况下电极在H2SO4溶液中对氧还原的性能。结果表明，金属沉积物和铂金属修饰的碳电极对氧还原反应（ORR）表现出优异的电催化活性，这是由氧还原的峰值电流密度值的相对增加所显示的。

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