Surface treatment effects on CO oxidation reactions over Co, Cu, and Ni-doped and codoped CeO2 catalysts

Title
Surface treatment effects on CO oxidation reactions over Co, Cu, and Ni-doped and codoped CeO2 catalysts
Author(s)
손영구박요한김석규Pradhan[Pradhan]
Keywords
TRANSITION-METAL OXIDES; OXYGEN VACANCIES; AG/CEO2 CATALYSTS; DIMENSIONAL CEO2; AU/TIO2 CATALYST; CARBON-MONOXIDE; CERIA; NANOPARTICLES; PERFORMANCE; NANOCUBES
Issue Date
201408
Publisher
ELSEVIER SCIENCE SA
Citation
CHEMICAL ENGINEERING JOURNAL, v.250, pp.25 - 34
Abstract
We doped (M) and codoped (MM') Co, Cu, and Ni into CeO2 support, and tested their gas-phase CO oxidation performance by temperature-programmed reaction mass spectrometry for the as-prepared, thermal H-2- and N-2-treated samples. Additionally, fundamental characteristics of doped CeO2 were revealed by transmission electron microscopy, optical microscopy, X-ray diffraction crystallography, UV-visible absorption, Brunauer-Emmett-Teller (BET) surface area measurements, and temperature-programmed reduction experiments. The CO oxidation performance was greatly improved upon metal-doping and thermal pre-treatment in H-2 and N-2 condition. It was found that Cu-contained samples showed higher CO performance while Ni, Co and CoNi-doped samples showed poor performances. The T-10% (the temperature at 10% CO conversion) was lowered by 140 degrees C upon Cu-doping. Upon N-2 (or H-2-thermal treatment), the T-10% was lowered by 80 and 110 degrees C for Cu-doped and undoped CeO2 catalyst, respectively. Overall, this study provides deeper information of surface treatment effects useful to development of efficient catalysts. (C) 2014 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/31215http://dx.doi.org/10.1016/j.cej.2014.03.070
ISSN
1385-8947
Appears in Collections:
이과대학 > 화학생화학부 > Articles
문과대학 > 중국언어문화학과 > Articles
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