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


Vol. 34,  No. 12, pp. 3635-3640, Dec.  2013
10.5012/bkcs.2013.34.12.3635


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  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 °C) < Ni-TiO2@SiO2 (90 °C) < Ni-TiO2@SiO2 (450 °C) in the first CO oxidation run, and greatly improved activity in the same order in the second run. The T10% (the temperature at 10% CO conversion) corresponds to the CO oxidation rate of 2.8 × 10−5 molCO gcat −1 s−1. For Ni-TiO2@SiO2 (450 °C), the T10% was observed at 365 °C in the first run and at 335 °C in the second run. For the Pd-TiO2@SiO2 (450 °C), the T10% was observed at a much lower temperature of 263 °C in the first CO oxidation run, and at 247 °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.

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  Cite this article

[IEEE Style]

Y. Do, I. Cho, Y. Park, D. Pradhan, Y. Sohn, "CO Oxidation Activities of Ni and Pd-TiO2@SiO2 Core-Shell Nanostructures," Bulletin of the Korean Chemical Society, vol. 34, no. 12, pp. 3635-3640, 2013. DOI: 10.5012/bkcs.2013.34.12.3635.

[ACM Style]

Yeji Do, Insu Cho, Yohan Park, Debabrata Pradhan, and Youngku Sohn. 2013. CO Oxidation Activities of Ni and Pd-TiO2@SiO2 Core-Shell Nanostructures. Bulletin of the Korean Chemical Society, 34, 12, (2013), 3635-3640. DOI: 10.5012/bkcs.2013.34.12.3635.

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ISSN(Print) 0253-2964
ISSN(Online) 1229-5949