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谭东兴, 李洪起, 王春晓, 赵健*
(青岛科技大学 橡塑材料与工程教育部重点实验室,山东 青岛 266042)
摘要: 以氧化石墨(GO)为原料,利用超临界CO2和甲醇混合流体的黏度低、密度可控、表面张力为零等优点,以二甲基铵硼烷(DMAB)为还原剂将GO还原为石墨烯(RGO),并将PtRuNi、PtRu、 Pt等金属纳米粒子成功地负载到石墨烯表面。通过X射线衍射(XRD)、透射电子显微镜(TEM)等方法分析了PtRuNi/RGO等复合物的结构特征,并用电化学的方法比较了PtRuNi/RGO,PtRu/RGO,Pt/RGO与PtRuNi/XC72 ,PtRu/XC72,Pt/XC72对乙醇氧化的电催化活性。结果显示,所制备的PtRuNi/RGO具有更高的乙醇电催化效能。
关键词: 石墨烯; 乙醇; 超临界流体; 铂钌镍合金; 电催化
中图分类号: O 643.36+1 文献标志码: A
Supercritical Fluid Assisted Synthesis of PtRuNi Nanoparticles Supported on Graphene Towards Ethanol Oxidation
TAN Dongxing, LI Hongqi, WANG Chunxiao, ZHAO Jian
(Key Laboratory of RubberPlastics,Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: In this experiment, graphite oxide (GO), as a raw material, was reduced to graphene (RGO) by the reducing agent dimethyl ammonium borane (DMAB), and PtRuNi, PtRu, Pt metal nanoparticles were successfully loaded onto the surface of the graphene. In this process, we used supercritical CO2 fluid because it has unique properties such as low viscosity, high diffusion and near zero surface tension etc. We analyzed structural characteristics of PtRuNi/RGO composites using Transmission Electron Microscopy (TEM) and X Ray Diffraction (XRD). The electrocatalytic performance of PtRuNi/RGO,PtRu/RGO, Pt/RGO and PtRuNi/XC72, PtRu/XC72, Pt/XC72 ethanol oxidation was evaluated. The results show that the PtRuNi/RGO has significantly improved electrocatalytic activity and stability to ethanol oxidation.
Key words: graphene; ethanol; supercritical fluid; platinumrutheniumnickel alloy; electrocatalysis
收稿日期: 20141107
基金项目: 国家自然科学基金项目(51373088,51073082);青岛市科技计划基础研究项目(12143(7)JCH,12143(25)JCH).
作者简介: 谭东兴(1990—),男,硕士研究生. *通信联系人.
文章编号: 16726987(2016)02015105; DOI: 10.16351/j.16726987.2016.02.007