【作者】 吴福祥； 张东堂； 于志辉； 汪夏燕；

【Author】 Fuxiang Wu;Dongtang Zhang;Zhihui Yu;Xiayan Wang;College of Environmental and Energy Engineering, Beijing University of Technology;

【机构】 北京工业大学环境与能源工程学院；

【摘要】 微流控合成是近年来发展起来的一种微区反应技术,由于其具有高度可控、传质传热速度快、混合时间短、可连续反应以及安全性高等优点,微流控技术逐渐成为化学合成领域中的研究热点。本文以H2PtCl6·6H2O和Bi(NO3)3·5H2O为前驱体、PVP为保护剂、H3NBH3为还原剂,在乙二醇体系下利用微流控技术合成石墨烯负载的铂铋双金属电催化剂(PtBi/rGO),并将其用于直接甲醇燃料电池的阴极催化剂。从TEM图可以观察到所制备出的PtBi催化剂为纳米线网状结构,该产物形貌单一、粒径分布窄,纳米线的平均直径为4.0±0.5 nm,而且在石墨烯上负载良好,分散均匀。电化学性能的测试显示,与商业Pt/C电极相比,所制备出的PtBi/rGO在0.1 HClO4+0.5 mol/L的CH3OH甲醇中表现出良好的催化活性和抗甲醇性。更多还原

【Abstract】 One-step and ultrafast synthesis of graphene supported PtBi nanowires(PtBi/rGO) in microfluidic reactors was reported. H2PtCl6·6H2O and Bi(NO3)3·5H2O were used as the precursors and PVP was employed as capping agent. The resulting product PtBi nanowires was well-loaded on the graphene sheet with uniform dispersion. The electrochemical tests showed that the catalyst had good properties of methanol-tolerance and oxygen reduction.更多还原