期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 17, 期 12, 页码 3390-3397出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201002419
关键词
carbon; carbon nitrides; conducting materials; electrocatalysis; mesoporous materials
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics, MEXT, Japa
- International Joint Graduate School (IJGS) Fellowship
We present a rational and simple methodology to fabricate highly conductive nitrogen-doped ordered mesoporous carbon with a graphitic wall structure by the simple adjustment of the carbonization temperature of mesoporous carbon nitride without the addition of any external nitrogen sources. By simply controlling the heat-treatment temperature, the structural order and intrinsic properties such as surface area, conductivity, and pore volume, and the nitrogen content of ordered graphitic mesoporous carbon can be controlled. Among the materials studied, the sample heat-treated at 1000 degrees C shows the highest conductivity, which is 32 times higher than that for the samples treated at 800 degrees C and retains the well-ordered mesoporous structure of the parent mesoporous carbon nitride and a reasonable amount of nitrogen in the graphitic framework. Since these materials exhibit high conductivity with the nitrogen atoms in the graphitic framework, we further demonstrate their use as a support for nanoparticle fabrication without the addition of any external stabilizing or size-controlling agent, as well as the anode electrode catalysts. Highly dispersed platinum nanoparticles with a size similar to that of the pore diameter of the support can be fabricated since the nitrogen atoms and the well-ordered porous structure in the mesoporous graphitic carbon framework act as a stabilizing and size-controlling agent, respectively. Furthermore the Pt-loaded, nitrogen-doped mesoporous graphitic carbon sample with a high conductivity shows much higher anodic electrocatalytic activity than the other materials used in the study.
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