In this paper, we prove an efficient and facile synthesis method for preparing PtRu nanoparticles (NPs)/graphene nanosheets (GNS) catalysts for methanol electrooxidation. Our approach employed carboxylated-graphene nanosheets (C-GNS) as the support which prepared by the Friedel-Crafts reaction between succinic anhydride and GNS. The reaction conditions are mild without cumbersome pretreatment of GNS. The morphology and component of PtRu NPs/C-GNS catalysts were characterized by transmission electron microscopy (TEM) and inductively coupled plasma-atom emission spectroscopy (ICP-AES), respectively. The TEM observation reveals that PtRu NPs with an average diameter of ca. 4.0 ± 0.5 nm uniformly distributed on the edges and wrinkles of C-GNS. The further electrochemical characterizations including cyclic voltammograms (CV) and chronoamperometry (CA) methods show that PtRu NPs/C-GNS catalysts have significantly higher electrocatalytic activity and stability toward methanol electrooxidation compared to the PtRu catalysts supported on the unmodified GNS. This provides an easy approach to synthesize GNS-based electrode materials for high-performance energy conversion devices in the future.

中文翻译：

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羧基化石墨烯纳米片负载PtRu催化剂的简便合成及其对甲醇的电催化氧化

在本文中，我们证明了制备甲醇电氧化的PtRu纳米粒子（NPs）/石墨烯纳米片（GNS）催化剂的高效简便的合成方法。我们的方法采用羧化石墨烯纳米片（C-GNS）作为载体，该载体是通过琥珀酸酐和GNS之间的Friedel-Crafts反应制备的。反应条件温和，无需繁琐的GNS预处理。PtRu NPs / C-GNS催化剂的形貌和组成分别通过透射电子显微镜（TEM）和电感耦合等离子体原子发射光谱（ICP-AES）表征。TEM观察表明，PtRu NPs的平均直径约为。4.0±0.5 nm均匀分布在C-GNS的边缘和皱纹上。包括循环伏安法（CV）和计时电流法（CA）在内的其他电化学表征表明，与负载在未经修饰的GNS上的PtRu催化剂相比，PtRu NPs / C-GNS催化剂具有更高的电催化活性和对甲醇电氧化的稳定性。这为将来为高性能能量转换设备合成基于GNS的电极材料提供了一种简便的方法。