铜银合金石墨烯纳米复合材料电催化性能研究.doc

铜银合金/石墨烯纳米复合材料的制备及电催化性能研究 摘 要：本实验我们使用Hummer法制备氧化石墨。采用电化学沉积法制备铜银合金/石墨烯纳米复合材料。采用扫描电子显微镜对复合材料微观形貌进行表征。用电化学工作站对复合材料的电催化性质进行了表征。本论文研究了亚硝酸根、水合肼在复合材料电极上的电化学行为。我们采用循环伏安法对两种物质电化学催化反应的电极材料、扫描圈数、电解质溶液的PH、扫速和催化性能进行了筛选。采用线性扫描伏安法确定了它们检出限和线性范围。亚硝酸钠的线性范围是8×10~9mol/L~8×10~7mol/L和8×10~7mol/L~2×10~6mol/L，检出限为8×10~9mol/L。水合肼的线性范围是6×10~9mol/L~8×10~7mol/L和8×10~7mol/L~8×10~6mol/L，检出限为6×10~9mol/L。通过条件筛选的过程，我们发现，石墨烯修饰电极对水合肼、亚硝酸钠有着良好的催化作用。 关键词：石墨烯；纳米复合材料；电催化 Praparation and Study On Electrocatalytic Performance of Cu~Ag Alloy/GrapHene Nanometer Material Abstract: We prepared oxidized grapHite by Hummer method in this experiment. The electrochemical deposition method was used to poreparate Cu~Ag alloy / grapHene nanocomposites . The microstructure of the composite was characterized by SEM.The electrocatalytic properties of the composite were characterized by electrochemical workstation.In this paper, the electrochemical behavior of nitrite and hydrazine hydrate in the composite electrode is studied on modified electrode.We use cyclic voltammetry to screen the electrode material, the number of scan cycles, the PH, scan rate and catalytic performance of two kinds of electrochemical catalytic reactions.Linear sweep voltammetry was used to determine the detection limit and linear range.The linear range of sodium nitrite was 8×10~9mol/L~8×10~7mol/L and 8×10~7mol/L~2×10~6mol/L.The detection limit was 8×10~9mol/L.The linear range of hydrazine hydrate was 6×10~9mol/L~8×10~7mol/L and 8×10~7mol/L~8×10~6mol/L.The detection limit was 6×10~9mol/L.Through the process of conditional selection, we found that the modified electrode had a good catalytic effect for hydrazine hydrate and sodium nitrite. Key word: GrapHene；Nanometer Material；Electrocatalytic  目 录 1 绪论 1 1.1 选题背景 1 1.2 石墨烯纳米复合材料的概述 2 1.2.1 石墨烯的概述 2 1.2.2 铜银合金的概述 3 1.2.2 石墨烯复合纳米材料的概述 4 1.3 纳米复合材料的应用 4 1.3.1 石墨烯复合纳米材料在电化学传感器中的应用 4 1.3.2 石墨烯复合材料在电化学存储中的应用[22] 5 1.3.3 石墨烯纳米复合材料在电化学催化中的应用 6 1.3.4 化学修饰电极的概述 7 1.4 本课题的选题意义和研究内容 7 1.4.1