FePt nanoparticles with the chemically ordered fct crystal structure have been widely studied because of the unique magnetic properties and the electrocatalytic activity for Oxygen Reduction Reactions (ORR). In this study, reduced graphene oxide (r-GO) supported FePt nanoparticles are successfully synthesized by a facile and completely green chemical approach. The structural, morphological, physicochemical and magnetic properties of the synthesized materials are systematically investigated by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM) measurements. It is shown that the FePt nanoparticles with the fct crystal structure uniformly growth on the surface of the r-GO and remain isolated even after high temperature thermal treatment. Furthermore, the nanocomposite materials reveal strong ferromagnetic behavior at room temperature.

中文翻译：

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fct FePt纳米粒子通过绿色简便方法在还原GO表面均匀生长。具有高矫顽力和高表面积的铁磁r-GO纳米复合材料

具有独特的磁性和对氧还原反应（ORR）的电催化活性，已对具有化学有序fct晶体结构的FePt纳米粒子进行了广泛的研究。在这项研究中，通过一种简便且完全绿色的化学方法成功合成了还原氧化石墨烯（r-GO）负载的FePt纳米颗粒。通过X射线衍射（XRD），拉曼光谱，X射线光电子能谱（XPS），透射电子显微镜（TEM）和振动样品磁强计（VSM）对合成材料的结构，形态，物理化学和磁性进行了系统研究测量。结果表明，具有fct晶体结构的FePt纳米颗粒在r-GO表面均匀生长，即使经过高温热处理也保持隔离状态。