溶液中等离子法制备Pt纳米颗粒负载TiO_2增强甲醇电催化性能  

Solution plasma synthesis of Pt nanoparticles supported on TiO_2 nanoparticles for promoted methanol electro-catalysis

作　　者：张剑波[1,2,3] 袁乐凡 杨晖 胡秀兰[1,2,3] ZHANG Jianbo;YUAN Lefan;YANG Hui;HU Xiulan(College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China;The Synergetic Innovation Center for Advanced Materials,Nanjing 210009,China;Jiangsu Collaborative Innovation Center for Advanced Inorganic Punction Composites,Nanjing 210009,China)

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]江苏先进生物与化学制造协同创新中心,江苏南京210009 [3]江苏先进无机功能复合材料协同创新中心,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2018年第4期1-6,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金(51372113);江苏高校优势学科建设工程;江苏高校品牌专业建设工程

摘　　要：通过溶液中等离子法快速制备Pt纳米颗粒,选用TiO_2(P25)提升Pt纳米颗粒的电催化性能,并以石墨烯纳米片(GNs)为载体材料,通过简单的超声混合制备Pt/GNs/TiO_2催化剂。采用X线衍射仪(XRD)、透射电子显微镜(TEM)、X线光电子能谱仪(XPS)及循环伏安曲线(CV)测试等表征手段分析样品的组成、形貌、表面电子特性及对甲醇的电催化性能。结果表明:制备得到了在GNs表面分布均匀、结晶性良好并且直径为2~5 nm的Pt纳米颗粒,同时TiO_2也成功分散在GNs表面。加入TiO_2极大地提高了Pt纳米颗粒对甲醇的电催化活性,Pt/GNs/TiO_2的电流密度约为2 480 m A/mg,是未加入TiO_2的Pt/GNs(747 m A/mg)的3.3倍,同时其循环性能和抗中毒性能也得到了提升。Pt nanoparticles were synthesized by solution plasma technique. The TiO2 nanoparticles（ P25）were used to enhance the electro-catalysis properties of Pt nanoparticles with graphene nanosheets（ GNs）as the support material. The Pt/GNs/TiO2 catalyst was obtained by ultrasonic mixing. The structure,morphology,component,methanol oxidation performance and cycling stability of the as-obtained catalyst were characterized by X-ray diffraction（ XRD）,transmission electron microscope（ TEM）,energy dispersive X-ray（ EDX） and cyclic voltammogram measurement,respectively. Results showed that well crystallized Pt nanoparticles in the size range of 2-5 nm were produced,and Pt and TiO2 nanoparticles were well dispersed on the surface of graphene nanosheets. The Pt/GNs/TiO2 exhibited excellent electro-catalytic activity with 3. 3 times higher compared with that of Pt/GNs,stability and poisoning resistance towards methanol electro-oxidation.

关 键 词：溶液中等离子法 Pt纳米颗粒 TIO2纳米颗粒 甲醇电催化 

分 类 号：TM911[电气工程—电力电子与电力传动]