Synthesis of porous NiFe2O4 microparticles and its catalytic properties for methane combustion |
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Authors: | Shaojie Feng Wu YangZhongbing Wang |
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Affiliation: | a School of Materials Science and Chemical Engineering, Anhui University of Architecture, Hefei, Anhui 230022, China b School of Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, China |
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Abstract: | In this paper, we report the obtention of agglomerate porous NiFe2O4 microparticles type-spinel with uniform size of 1-2 μm by the oxalic acid co-precipitation method. The structure, morphology and surface of microparticles as-synthesized were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy (XPS), respectively. Fixed bed reactor test confirmed that the NiFe2O4 microparticles exhibit a good catalytic activity for methane combustion with the methane light-off temperature below 350 °C. XPS spectrum revealed that the excellent catalytic activity may be attributed to the surface oxygen vacancies arising from the peculiar inverse spinel structure with octahedral (Oh) site occupied by Fe2+ and Ni2+ cations. |
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Keywords: | NiFe2O4 Inverse spinel Methane Combustion |
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