Highly dispersed platinum supported on nitrogen-containing ordered mesoporous carbon for methanol electrochemical oxidation

被引：102

作者：

Lei, Zhibin ^{[1
]}

An, Lizhen ^{[1
]}

Dang, Liqin ^{[1
]}

Zhao, Mingyi ^{[1
]}

Shi, Jingying ^{[2
]}

Bai, Shiying ^{[1
]}

Cao, Yindi ^{[1
]}

机构：

[1] Liaoning Normal Univ, Fac Chem & Chem Engn, Inst Chem Functionalized Mat, Dalian 116029, Liaoning, Peoples R China

[2] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2009年 / 119卷 / 1-3期

关键词：

Mesoporous carbon; Nitrogen group; Dispersion of platinum; Methanol oxidation; CHEMICAL-VAPOR-DEPOSITION; GRAPHITIC PORE WALLS; FUEL-CELL; CATALYST SUPPORT; ELECTRONIC-STRUCTURE; TEMPLATING SYNTHESIS; NANOPOROUS CARBONS; PTRU NANOPARTICLES; SILICA PARTICLES; METAL-CLUSTERS;

D O I：

10.1016/j.micromeso.2008.09.033

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Nitrogen-containing ordered mesoporous carbons (NOMCs) characteristic of CMK-3 were nanocasted from mesoporous silica SBA-15 using aniline as carbon precursor. The influence of synthesis condition on the structural parameters of NOMCs were systematically investigated using N-2 adsorption, powder X-ray diffraction (XRD), transmission electron microscopy, X-ray photoelectron spectroscopy (XPS), elemental analysis and thermogravimetric analysis (TGA). The 2D hexagonally ordered nitrogen-containing mesoporous carbon could be synthesized in a wide temperature range (600-950 degrees C), with Brunauer-Emmett-Teller (BET) surface area varying from 988 to 1166 m(2)/g and pore size tunable from 2.7 to 3.3 nm. The N/C molar ratio in the framework of mesoporous carbon was found to be highly dependent on the synthesis condition and reduced from 9.5% to 4.8% as the synthesis temperature increased from 600 to 950 degrees C. XPS showed that nitrogen atoms were incorporated in graphitic sheets as quaternary nitrogen and pyridine-like nitrogen. The ca. 0.6 eV lower binding energy of Pt nanoparticles in contrast to that of bulk Pt indicated a strong interaction between nitrogen atoms and Pt nanoparticles, which was critical to the uniform dispersion of Pt nanoparticles on the nitrogen-containing mesoporous carbon. The CO stripping peak potentials depended on both the N/C ratio as well as Pt particles size. The activities of methanol oxidation on Pt/NOMCs were investigated by cyclic voltammograms and electrochemical impedance spectroscopy (EIS). The Pt/NOMCs showed generally high CO tolerance and comparable activity to Pt/XC-72 under the identical condition. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：30 / 38

页数：9

共 56 条

[1] Spherical carbon capsules with hollow macroporous core and mesoporous shell structures as a highly efficient catalyst support in the direct methanol fuel cell [J].