Journal
CHINESE JOURNAL OF CATALYSIS
Volume 37, Issue 6, Pages 923-933Publisher
SCIENCE PRESS
DOI: 10.1016/S1872-2067(15)61094-4
Keywords
Three-dimensionally ordered macroporous material; Gold nanoparticle; Ceria; Soot combustion; Synergistic effect
Funding
- National Natural Science Foundation of China [21477146, 21303263]
- National High Technology Research and Development Program of China (863 Program) [2015AA034603]
- Beijing Nova Program [Z141109001814072]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20130007120011]
- Science Foundation of China University of Petroleum-Beijing [YJRC-2013-13, 2462013BJRC003]
Ask authors/readers for more resources
Au/3DOM (three-dimensionally ordered macroporous) Al2O3 and Au/CeO2/3DOM Al2O3 were prepared using a reduction-deposition method and characterized using scanning electron microscopy, N-2 adsorption-desorption, X-ray diffraction, transmission electron microscopy, ultraviolet-visible spectroscopy, temperature-programmed hydrogen reduction, and X-ray photoelectron spectroscopy. Au nanoparticles of similar sizes were well dispersed and supported on the inner walls of uniform macropores. The norminal Au loading is 2%. Al-Ce-O solid solution in CeO2/3DOM Al2O3 catalysts can be formed due to the incorporation of Al3+ ions into the ceria lattice, which causes the creation of extrinsic oxygen vacancies. The extrinsic oxygen vacancies improved the oxygen-transport properties. The strong metal-support interactions between Au and CeO2 increased the amount of active oxygen on the Au nanoparticle surfaces, and this promoted soot oxidation. The activities of the Au-based catalysts were higher than those of the supports (Al2O3 or CeO2/3DOM Al2O3) at low temperature. Au/CeO2/3DOM Al2O3 had the highest catalytic activity for soot combustion, with T-10, T-50, and T-90 values of 273, 364, and 412 degrees C, respectively. (C) 2016, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available