Su Fabing, Zhao X S, Wang Yong, Zeng Jianhuang, Zhou Zuocheng, Lee Jim Yang
Department of Chemical and Biomolecular Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260.
J Phys Chem B. 2005 Nov 3;109(43):20200-6. doi: 10.1021/jp0541967.
In this study, ordered macroporous carbon with a three-dimensional (3D) interconnected pore structure and a graphitic pore wall was prepared by chemical vapor deposition (CVD) of benzene using inverse silica opal as the template. Field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectrometry, nitrogen adsorption, and thermogravimetric analysis techniques were used to characterize the carbon samples. The electrochemical properties of the carbon materials as a carbon-based anode for lithium-ion batteries and as a Pt catalyst support for room-temperature methanol electrochemical oxidation were examined. It was observed that the CVD method is a simple route to fabrication of desired carbon nanostructures, affording a carbon with graphitic pore walls and uniform pores. The graphitic nature of the carbon enhances the rate performance and cyclability in lithium-ion batteries. The specific capacity was found to be further improved when SnO(2) nanoparticles were supported on the carbon. The specific activity of Pt catalyst supported on the carbon materials for room-temperature methanol electrochemical oxidation was observed to be higher than that of a commercial Pt catalyst (E-TEK).
在本研究中，以反相二氧化硅蛋白石为模板，通过苯的化学气相沉积（CVD）制备了具有三维（3D）互连孔结构和石墨化孔壁的有序大孔碳。采用场发射扫描电子显微镜、透射电子显微镜、X射线衍射、拉曼光谱、氮气吸附和热重分析技术对碳样品进行了表征。研究了碳材料作为锂离子电池碳基负极以及作为室温甲醇电化学氧化的铂催化剂载体的电化学性能。结果表明，CVD法是制备所需碳纳米结构的一种简单方法，可得到具有石墨化孔壁和均匀孔的碳。碳的石墨化性质提高了锂离子电池的倍率性能和循环稳定性。当在碳上负载SnO₂纳米颗粒时，比容量进一步提高。观察到负载在碳材料上的铂催化剂对室温甲醇电化学氧化的比活性高于商业铂催化剂（E-TEK）。
