Abstract In this paper, we report the preparation of graphene supported nano-palladium-silver on carbon cloth (G-PdAg/CC) electrode for electrocatalytic oxidation of methanol in alkaline medium and its performance is compared with graphene supported nano-palladium and silver on CC (G-Pd/CC and G-Ag/CC respectively) electrodes. The G-PdAg composite is prepared for the first time via a completely electrochemical, fast, green and one-step procedure leading to the formation of both dendritic and spherical graphene supported PdAg bimetallic catalysts on a commercially applicable CC electrode. Field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and atomic absorption spectrometry (AAS) are used for physical and elemental characterization of the modified electrodes. Electrochemical characterizations are performed using cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy (EIS). The results are indicative of outstanding properties in terms of catalytic activity, stability and resistance toward poisoning reaction intermediates for electrooxidation of methanol in alkaline medium. All results reveal that this electrode is a favorable candidate for alkaline direct methanol fuel cell.

中文翻译：

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石墨烯负载的树枝状和球形纳米钯-银双金属催化剂在碳布上的一步共电沉积在碱性介质中用于甲醇的电氧化

摘要 在本文中，我们报道了石墨烯负载的纳米钯银碳布（G-PdAg/CC）电极的制备，用于碱性介质中甲醇的电催化氧化，并将其性能与石墨烯负载的纳米钯银电极进行比较。 CC（分别为 G-Pd/CC 和 G-Ag/CC）电极。G-PdAg 复合材料是首次通过完全电化学、快速、绿色和一步法制备，导致在商用 CC 电极上形成树枝状和球形石墨烯负载的 PdAg 双金属催化剂。场发射扫描电子显微镜 (FESEM)、透射电子显微镜 (TEM)、能量色散 X 射线光谱 (EDS)、X 射线衍射 (XRD) 和原子吸收光谱 (AAS) 用于对改性电极进行物理和元素表征。使用循环伏安法、计时电流法和电化学阻抗谱 (EIS) 进行电化学表征。结果表明，在碱性介质中甲醇电氧化的催化活性、稳定性和抗中毒反应中间体方面具有出色的性能。所有结果表明，该电极是碱性直接甲醇燃料电池的理想选择。甲醇在碱性介质中电氧化的稳定性和抗中毒反应中间体。所有结果表明，该电极是碱性直接甲醇燃料电池的理想选择。甲醇在碱性介质中电氧化的稳定性和抗中毒反应中间体。所有结果表明，该电极是碱性直接甲醇燃料电池的理想选择。