Multi-wall carbon nanotubes as support of copper-cerium composite for preferential oxidation of carbon monoxide

被引：33
作者：
Zeng, Shanghong [1 ]
Zhang, Lu [1 ]
Jiang, Nan [1 ]
Gao, Meiyi [1 ]
Zhao, Xiaozhou [1 ]
Yin, Yueling [1 ]
Su, Haiquan [1 ]
机构：
[1] Inner Mongolia Univ, Sch Chem & Chem Engn, Inner Mongolia Key Lab Chem & Phys Rare Earth Mat, Hohhot 010021, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2015年 / 293卷
基金：
中国国家自然科学基金;
关键词：
Multi-wall carbon nanotubes; Copper cerium composite; Hydrogen; Preferential oxidation of carbon monoxide; CATALYTIC-ACTIVITY; CUO-CEO2; CATALYSTS; CO OXIDATION; CUO/CEO2; NANOPARTICLES; PERFORMANCE; CEO2/CUO; NITROGEN; GROWTH; OXIDES;
D O I：
10.1016/j.jpowsour.2015.04.115
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：
The CuxO/MWCNTs, CeO2/MWCNTs and CuxO-CeO2/MWCNTs catalysts were synthesized by a simple impregnation method, and characterized via X-ray diffraction, N-2 adsorption-desorption, Fourier transformed infrared spectroscopy, transmission electron microscopy, H-2 temperature-programmed reduction and X-ray photoelectron spectra. The catalytic performance for preferential CO oxidation was carried out in the hydrogen-rich gasses. It is found that the hydrophilic functional groups of hydroxyl and carboxyl in the samples are favorable for the incorporation of CuxO and CeO2 into the tubes of the MWCNTs. Most of CuxO particles and CeO2 nanowires are filled in the tubes of MWCNTs, and a small amount of nanoparticles are deposited on the surface of MWCNTs. The MWCNTs have high BET surface area, which is helpful for the dispersion of CuxO and CeO2 to expose more active surface for CO-PROX reaction over the CuxO-CeO2/MWCNTs catalysts. The CuxO-CeO2/MWCNTs-C catalyst shows good catalytic activity and the temperature window of CO total conversion is from 135 degrees C to 175 degrees C. MWCNTs with high BET surface area weaken poisoning effect of H2O and CO2 after 135 degrees C. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：1016 / 1023
页数：8
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