超临界混合流体辅助PtRuNi纳米粒子负载于低缺陷石墨烯的乙醇电催化氧化性能

PDF全文下载：2017010070

王希玮，殷耀禹,李洪起,赵健*

 （青岛科技大学高分子科学与工程学院，山东青岛266042）

摘要：通过较低浓度酸在冷凝回流的条件下处理石墨烯片层，使得石墨烯片层上具有充足但不过量的含氧基团。这些含氧基团既可以调节石墨烯在溶剂中的溶解性，又可以作为金属纳米粒子沉积时的成核点。再以制备好的低缺陷石墨烯（LDG）为原料，利用超临界CO2和甲醇混合流体的黏度低、密度可控和表面张力为零等优点，将PtRuNi、PtRu、Pt等金属纳米粒子成功负载到石墨烯表面。通过X-射线衍射仪（XRD）、透射电子显微镜（TEM）、能量色谱仪（EDS）、X-射线光电子能谱（XPS）、拉曼（Raman）等方法分析了PtRuNi/LDG复合物的结构特征。并用电化学的方法比较了PtRuNi/LDG，PtRu/LDG，Pt/LDG与PtRuNi/XC-72，PtRu/XC-72，Pt/XC-72对乙醇氧化的电催化活性，结果显示，所制备的PtRuNi/LDG具有更高的乙醇电催化效能。

 关键词：  低缺陷石墨烯;乙醇;超临界流体;电催化;铂

 中图分类号： O 063文献标志码：A

引用格式：王希玮，殷耀禹,李洪起,等.超临界混合流体辅助PtRuNi纳米粒子负载于低缺陷石墨烯的乙醇电催化氧化性能［J］.青岛科技大学学报(自然科学版), 2017, 38(1): 7075.

WANG Xiwei, YIN Yaoyu, LI Hongqi, et al.Supercritical fluid-assisted synthesis of PtRuNi nanoparticles supported on low defect graphene towards ethanol oxidation［J］.Journal of Qingdao University of Science and Technology（Natural Science Edition), 2017, 38(1): 7075.

Supercritical Fluidassisted Synthesis of PtRuNi Nanoparticles Supported on Low Defect Graphene Towards Ethanol Oxidation

WANG Xiwei, YIN Yaoyu, LI Hongqi, ZHAO Jian

 (College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

 Abstract: In this experiment, through the low concentration of acid to treat the graphite layers under the condition of reflux condensation, the graphite layers embrace sufficient but not excessive oxygen containing groups. These oxygen containing groups not only can modulate the solubility of graphene in solvents, but also can serve as nucleation sites for deposition of metal nanoparticles. Low defect graphene with prepared (LDG), as a raw material, and Pt, PtRu, PtRuNi metal nanoparticles were successfully loaded onto the surface of the graphene. In this process, we used supercritical CO2 fluid because it has some unique properties such as low viscosity, high diffusion and near zero surface tension etc.We analyzed structural characteristics of PtRuNi/LDG composites using transmission electron microscopy (TEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The electrocatalytic performance of PtRuNi/LDG,PtRu/LDG,Pt/LDG and PtRuNi/XC-72, PtRu/XC-72, Pt/XC-72 towards ethanol oxidation was evaluated. The results show that the PtRuNi/LDG has significantly improved electrocatalytic activity and stability towards ethanol oxidation.

 Key words: low defect graphene; ethanol; supercritical fluid; electro-catalytic; platinum

 收稿日期：   20150327

基金项目：国家自然科学基金项目（51373088）.

 作者简介：王希玮（1991—），女，硕士研究生. *通信联系人.

文章编号：16726987（2017）01007006；DOI：10.16351/j.16726987.2017.07.012