Citation: Baofang Jin, Yuechang Wei, Zhen Zhao, Jian Liu, Guiyuan Jiang, Aijun Duan. Effects of Au-Ce strong interactions on catalytic activity of Au/CeO₂/3DOM Al₂O₃ catalyst for soot combustion under loose contact conditions[J]. Chinese Journal of Catalysis, ;2016, 37(6): 923-933. doi: 10.1016/S1872-2067(15)61094-4 shu

Effects of Au-Ce strong interactions on catalytic activity of Au/CeO₂/3DOM Al₂O₃ catalyst for soot combustion under loose contact conditions

State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China

Received Date: 24 January 2016
Revised Date: 12 March 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21477146, 21303263), the National High Technology Research and Development Program of China (863 Program, 2015AA034603), Beijing Nova Program (Z141109001814072), the Specialized Research Fund for the Doctoral Program of Higher Education of China (20130007120011), and the Science Foundation of China University of Petroleum-Beijing (YJRC-2013-13, 2462013BJRC003).

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, N₂ 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 T₁₀, T₅₀, and T₉₀ values of 273, 364, and 412 ℃, respectively.
- Three-dimensionally ordered macroporous material,
- Gold nanoparticle,
- Ceria,
- Soot combustion ,
- Synergistic effect
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南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

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通讯作者: 陈斌, bchen63@163.com

Effects of Au-Ce strong interactions on catalytic activity of Au/CeO₂/3DOM Al₂O₃ catalyst for soot combustion under loose contact conditions