Ordered mesoporous graphitized pyrolytic carbon materials: synthesis, graphitization, and electrochemical properties

被引:85
|
作者
Wu, Zhangxiong [1 ,2 ,3 ]
Li, Wei [1 ,2 ]
Xia, Yongyao [1 ,2 ]
Webley, Paul [3 ]
Zhao, Dongyuan [1 ,2 ,3 ]
机构
[1] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China
[2] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China
[3] Monash Univ, Fac Engn, Dept Chem Engn, Melbourne, Vic 3800, Australia
基金
澳大利亚研究理事会; 美国国家科学基金会;
关键词
CHEMICAL-VAPOR-DEPOSITION; OXYGEN-REDUCTION; PLATINUM NANOPARTICLES; TEMPLATE SYNTHESIS; NANOPOROUS CARBON; PORE WALLS; FUEL-CELLS; SILICA; STORAGE; ROUTE;
D O I
10.1039/c2jm30192j
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Ordered mesoporous graphitized pyrolytic carbons have been successfully synthesized via direct chemical vapor deposition from methane with mesoporous silicas as the hard templates. The synthesis procedure is quite simple without use of solvent, catalyst or carrying gas, but efficient for producing mesoporous carbon materials. The whole carbon deposition process is comprehensively studied and illustrated, and the mesostructure regularity, pore architecture, and porosity of the resultant carbon materials can be tuned by simply manipulating the deposition time. The morphological, structural, textural and framework properties of the obtained carbon materials are extensively studied, clearly demonstrating the special features including controllable mesostructures, variable mesopore arrangements, large pore volumes (up to 2.3 cm(3) g(-1)), high surface areas (up to 750 m(2) g(-1)) and highly graphitized pore walls with preferred (002) crystal plane orientation. Simple thermal treatment pathways for further promoting the graphitization degree are also proposed. These mesoporous graphitic carbon materials hold promising potential for electrochemical energy storage and conversion applications. They can serve as excellent supports for platinum nanoparticles for oxygen reduction, showing greatly enhanced Pt utilization, activity, methanol tolerance and long-term stability compared to an activated-carbon-supported Pt catalyst. They can be adopted as electrode materials for lithiumion batteries, showing a high reversible capacity up to similar to 340 mAh g(-1) and a good cyclic stability. They can also be utilized as electrode materials without the use of any conductive additives for supercapacitors under non-aqueous systems, showing a specific capacitance of similar to 40 F g(-1) with high Coulombic efficiency and excellent rate performance.
引用
收藏
页码:8835 / 8845
页数:11
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