掺氮石墨烯-Pt纳米复合材料的合成及其对甲醇的电催化氧化

摘要: 石墨烯是一种性能优异的新型二维碳材料，被广泛应用于电子、催化、能源等领域。石墨烯-贵金属纳米粒子复合材料兼具石墨烯和贵金属纳米粒子的优异性能，在催化、生物传感器以及燃料电池等领域具有广阔的应用前景。本论文以氧化石墨为原料，采用溶剂热法制备氮掺杂石墨烯-Pt纳米粒子复合材料，考察温度、时间以及PH值等反应条件对复合材料结构和微观形貌的影响，探寻可控制备掺氮石墨烯-Pt纳米复合材料的可行方法。通过XRD、SEM、XPS等一系列技术手段对掺氮石墨烯-Pt纳米复合材料的组成和微观结构进行了表征，结果显示，通过控制pH值可以精确调控Pt纳米颗粒的尺寸，纳米颗粒最小直径约为5nm。电化学实验表明，掺氮石墨烯-Pt纳米复合物对甲醇氧化具有良好的催化作用、稳定性，有望用于燃料电池体系，为燃料电池的实际应用提供理论依据。72593

毕业论文关键词：石墨烯-Pt纳米复合材料，溶剂热法，电催化，

Abstract：Graphene is a new two-dimensional carbon material with excellent performance, which is widely used in many fields such as electronics, catalysis, energy and so on。 Graphene noble metal nanoparticles composites have excellent properties, such as graphene and noble metal nanoparticles, and have good application prospects in the fields of catalysis, biosensors and combustion batteries。 In this paper, using graphite oxide as raw material by nitrogen doped graphene Pt nanoparticles composite materials prepared by solvothermal method, to observe the effects of different temperature and different time and different pH, reaction conditions of composite structure and morphology, to explore the feasible method of nitrogen doped graphene Pt nano composite material to control the synthesis of。 By means of a series of technical means, the composition and microstructure of -Pt nano composite doped with nitrogen doped graphene were characterized and its application in electrocatalytic oxidation of methanol was investigated。 The results showed that the addition of nitrogen doped graphene -Pt nanocomposites could be prepared by the method of solvent thermal method, which could be used to lay the foundation for the application of nitrogen doped graphene -Pt nanocomposites。

Keywords: Graphene -Pt nanocomposites, solvent thermal method, Electro catalysis

1 前言 3

1。1石墨烯 3

1。2 铂 6

1。3电催化 6

2 实验部分 6

2。1 实验器材 6

2。2 实验试剂 7

2。3 氧化石墨的制备 7

2。4 合成掺氮石墨烯-Pt复合材料 7

2。5 电催化实验 9

3 结果与讨论 9

3。1 石墨烯的制备方法 9

3。2掺氮石墨烯-Pt纳米复合材料的合成 9

3。3掺氮石墨烯-Pt纳米复合材料的XRD表征 10

3。4掺氮石墨烯-Pt纳米符合材料的SEM表征 10

3。5掺氮石墨烯-Pt纳米符合材料的XPS表征 11

3。6掺氮石墨烯-Pt纳米复合材料对甲醇的电催化 12

结论 14

参考文献 15

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