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Coadsorption of gold with chlorine on CeO2 (111) surfaces: A first principles study |
Lu Zhan-Sheng (路战胜)a, He Bing-Ling (赫丙玲)b, Ma Dong-Wei (马东伟)c, Yang Zong-Xian (杨宗献)a |
a College of Physics and Electronic Engineering, Henan Normal University, Xinxiang 453007, China; b Department of Physics and Electronic Engineering, Xinxiang University, Xinxiang 453003, China; c School of Physics, Anyang Normal University, Anyang 455000, China |
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Abstract To investigate the effects of chlorine on the Au/ceria catalysts, the adsorption of gold or chlorine and their coadsorpiton on the stoichiometric and partially reduced CeO2 (111) surfaces are studied from the first principles. It is found that the adsorption of Au is significantly enhanced by the chlorine preadsorption on the stoichiometric CeO2 (111) surface; while on the partially reduced CeO2 (111) surface, the preadsorbed chlorine inhabits the oxygen vacancy (which is the preferred adsorption site for gold), leading to a CeOCl phase and the dramatical weakening of the Au adsorption. Therefore, chlorine on the CeO2 (111) surface can affect the Au adsorption thus the activity of the Au/CeO2 catalyst.
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Received: 14 April 2014
Revised: 23 August 2014
Accepted manuscript online:
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PACS:
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68.35.-p
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(Solid surfaces and solid-solid interfaces: structure and energetics)
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71.15.Mb
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(Density functional theory, local density approximation, gradient and other corrections)
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71.15.Nc
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(Total energy and cohesive energy calculations)
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71.20.-b
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(Electron density of states and band structure of crystalline solids)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11174070, 51401078, and 11147006), the China Postdoctoral Science Foundation (Grant No. 2012M521399), the Postdoctoral Research Sponsorship in Henan Province, China (Grant No. 2011038), and the Foundation for the Key Young Teachers of Henan Normal University and Start-up Foundation for Doctors of Henan Normal University, China. |
Corresponding Authors:
Yang Zong-Xian
E-mail: yzx@henannu.edu.cn
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Cite this article:
Lu Zhan-Sheng (路战胜), He Bing-Ling (赫丙玲), Ma Dong-Wei (马东伟), Yang Zong-Xian (杨宗献) Coadsorption of gold with chlorine on CeO2 (111) surfaces: A first principles study 2015 Chin. Phys. B 24 026801
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