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以氧化石墨烯为前驱体,通过氧化还原法制备了具有三维大孔稳定结构的Pt-Cu@3D石墨烯催化剂。作为载体,三维石墨烯的宏观大孔结构具有大比表面积,可以更好地促进催化反应中的传质过程。以对硝基苯酚的还原为模型反应,通过实验确定Pt与Cu的最佳质量比为3:5,利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、X射线衍射(XRD)和能量色散X射线光谱(EDX)等方法对最优催化剂的结构进行了表征。催化测试表明复合催化剂在对硝基苯酚还原反应中具有高效稳定、低成本、可循环的良好性能。
A Pt-Cu @ 3D graphene catalyst with a three-dimensional macroporous structure was prepared by a redox method using graphene oxide as a precursor. As a carrier, the macroscopic macropore structure of 3D graphene has a large specific surface area, which can better promote the mass transfer process in the catalytic reaction. The best mass ratio of Pt to Cu was 3: 5 by the reduction of p-nitrophenol as a model reaction. The optimum mass ratio of Pt to Cu was determined by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy , X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX) were used to characterize the structure of the optimized catalyst. Catalytic tests show that the composite catalyst has high efficiency, stability, low cost and recyclability in p-nitrophenol reduction.