کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1529129 | 995738 | 2011 | 4 صفحه PDF | دانلود رایگان |
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.
► Microporous NiFe2O4 spinel particles with uniform size of 1–2 μm was prepared by oxalic acid co-precipitation method.
► The NiFe2O4 exhibits a good catalytic activity for methane combustion with the methane light-off temperature below 350 °C.
► The excellent catalytic activity may be attributed to the surface oxygen vacancies arising from the peculiar inverse spinel structure with Oh site occupied by Fe2+ and Ni2+.
Journal: Materials Science and Engineering: B - Volume 176, Issue 18, 15 November 2011, Pages 1509–1512