功能化石墨烯负载的铂纳米颗粒对甲醇氧化和氧还原的电催化活性增强。
Enhanced electrocatalytic activity of Pt nanoparticles supported on functionalized graphene for methanol oxidation and oxygen reduction.
作者信息
Ma Junhong, Wang Li, Mu Xue, Cao Yali
机构信息
Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, People's Republic of China; College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, People's Republic of China.
Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, People's Republic of China.
出版信息
J Colloid Interface Sci. 2015 Nov 1;457:102-7. doi: 10.1016/j.jcis.2015.06.031. Epub 2015 Jun 23.
Reduced graphene oxide (RGO) is modified with 1,1'-dimethyl-4,4'-bipyridinium dichloride (methyl viologen, i.e. MV) by a π-π interaction, and further used as support for immobilization of Pt nanoparticles to prepare a Pt/MV-RGO catalyst for direct methanol fuel cells. Transmission electron microscopy, X-ray powder diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy are used to characterize the morphology and microstructure of the prepared catalyst. Electrocatalytic performance of the as-prepared Pt/MV-RGO hybrid is investigated by cyclic voltammetry, linear scan voltammetry, COads stripping voltammetry and electrochemical impedance spectroscopy. The Pt/MV-RGO hybrid exhibits much higher catalytic activities than Pt/RGO toward both methanol oxidation and oxygen reduction, suggesting that Pt/MV-RGO hybrid could be a promising electrocatalyst for high-performance direct methanol fuel cells applications.
还原氧化石墨烯（RGO）通过π-π相互作用用1,1'-二甲基-4,4'-联吡啶二氯化物（甲基紫精，即MV）进行修饰，并进一步用作固定Pt纳米颗粒的载体，以制备用于直接甲醇燃料电池的Pt/MV-RGO催化剂。使用透射电子显微镜、X射线粉末衍射、拉曼光谱和X射线光电子能谱对制备的催化剂的形貌和微观结构进行表征。通过循环伏安法、线性扫描伏安法、CO吸附脱附伏安法和电化学阻抗谱研究了所制备的Pt/MV-RGO杂化物的电催化性能。Pt/MV-RGO杂化物在甲醇氧化和氧还原方面均表现出比Pt/RGO更高的催化活性，这表明Pt/MV-RGO杂化物可能是用于高性能直接甲醇燃料电池应用的有前景的电催化剂。
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