TY - JOUR
T1 - Highly crystalline and conductive nitrogen-doped mesoporous carbon with graphitic walls and its electrochemical performance
AU - Datta, Kasibhatta K R
AU - Balasubramanian, Veerappan V.
AU - Ariga, Katsuhiko
AU - Mori, Toshiyuki
AU - Vinu, Ajayan
PY - 2011/3/14
Y1 - 2011/3/14
N2 - 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°C shows the highest conductivity, which is 32 times higher than that for the samples treated at 800°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. Just apply heat: The preparation of highly conductive nitrogen-doped mesoporous carbon with well-ordered hexagonal-type pores as well as a graphitic wall structure (see graphic) by simply heat-treating the mesoporous carbon nitride at different carbonization temperatures is demonstrated.
AB - 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°C shows the highest conductivity, which is 32 times higher than that for the samples treated at 800°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. Just apply heat: The preparation of highly conductive nitrogen-doped mesoporous carbon with well-ordered hexagonal-type pores as well as a graphitic wall structure (see graphic) by simply heat-treating the mesoporous carbon nitride at different carbonization temperatures is demonstrated.
KW - carbon
KW - carbon nitrides
KW - conducting materials
KW - electrocatalysis
KW - mesoporous materials
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U2 - 10.1002/chem.201002419
DO - 10.1002/chem.201002419
M3 - Article
C2 - 21337434
AN - SCOPUS:79952392853
SN - 0947-6539
VL - 17
SP - 3390
EP - 3397
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 12
ER -