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Title: A facile approach for the preparation of biomorphic CuO-ZrO 2 catalyst for catalytic combustion of methane
Authors: Luo, J.
Xu, H.
Liu, Y.
Chu, W.
Jiang, C.
Zhao, X. 
Keywords: Bio-template method
Biomorphic CuO-ZrO 2 catalyst
Methane catalytic combustion
Issue Date: 7-May-2012
Citation: Luo, J., Xu, H., Liu, Y., Chu, W., Jiang, C., Zhao, X. (2012-05-07). A facile approach for the preparation of biomorphic CuO-ZrO 2 catalyst for catalytic combustion of methane. Applied Catalysis A: General 423-424 : 121-129. ScholarBank@NUS Repository.
Abstract: A series of novel biomorphic CuO-ZrO 2 catalysts were prepared using a cotton bio-template and compared with conventional CuO-ZrO 2 catalysts. The physical and chemical properties of the as-obtained catalysts were characterized by techniques including X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), H 2-temperature programmed reduction (H 2-TPR), and O 2-temperature programmed desorption (O 2-TPD). The catalytic combustion of methane was chosen as the probe reaction. The results suggested that the bio-template method prepared porous biomorphic CuO-ZrO 2 catalysts consist of hollow microtubes. Comparing with conventional CuO-ZrO 2 catalysts, biomorphic CuO-ZrO 2 catalysts displayed better reducibility and oxygen mobility, stronger metal-oxides synergistic effect, appropriate particle size distribution, and lower activation energy. The crystalline state of zirconia transformed from a single crystallite phase of t-ZrO 2 into a complex of m-ZrO 2 and t-ZrO 2 after introducing the bio-template. With proper CuO content (20 mol%), the biomorphic CuO-ZrO 2 catalyst displayed preponderant properties. The compensation of surface lattice oxygen from bulk lattice oxygen was more available at high reaction temperatures. © 2011 Elsevier Ltd. All rights reserved.
Source Title: Applied Catalysis A: General
ISSN: 0926860X
DOI: 10.1016/j.apcata.2012.02.025
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