CO Oxidation Activities of Ni and Pd-TiO2@SiO2 Core-Shell Nanostructures

Title
CO Oxidation Activities of Ni and Pd-TiO2@SiO2 Core-Shell Nanostructures
Author(s)
손영구도예지조인수박요한D. Pradhan[D. Pradhan]
Keywords
GOLD NANOPARTICLES; CATALYSTS; SILICA; NANORODS; GAS
Issue Date
201312
Publisher
KOREAN CHEMICAL SOC
Citation
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.34, no.12, pp.3635 - 3640
Abstract
We prepared Ni and Pd-modified TiO2@SiO2 core-shell nanostructures and then analyzed them by scanning electron microscopy, optical microscopy, X-ray diffraction crystallography, FT-IR. and UV-Visible absorption spectroscopy. In addition, their CO oxidation performance was tested by temperature-programmed mass spectrometry. The CO oxidation activity showed an order of Ni-TiO2@SiO2 (900 degrees C) <Ni-TiO2@SiO2(90 degrees C) <Ni-TiO2@SiO2 (450 degrees C) in the first CO oxidation run, and greatly improved activity in the same order in the second run. The T-10% (the temperature at 10% CO conversion) corresponds to the CO oxidation rate of 2.8 x 10(-5) molco g(cat)(-1) s(-1). For Ni-TiO2@SiO2 (450 degrees C), the T-10% was observed at 365 degrees C in the first run and at 335 degrees C in the second run. For the Pd-TiO2@SiO2 (450 degrees C), the T-10% was observed at a much lower temperature of 263 degrees C in the first CO oxidation run, and at 247 degrees C in the second run. The CO oxidation activities of transition metal modified TiO2@SiO2 core-shell nanostructures presented herein provide new insights that will be useful in developing catalysts for various environments.
URI
http://hdl.handle.net/YU.REPOSITORY/28307http://dx.doi.org/10.5012/bkcs.2013.34.12.3635
ISSN
0253-2964
Appears in Collections:
이과대학 > 화학생화학부 > Articles
문과대학 > 중국언어문화학과 > Articles
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