Effect of template on catalytic performance of La0.7Ce0.3Ni0.7Fe0.3O3 for ethanol steam reforming reaction
来源期刊：JOURNAL OF RARE EARTHS2019年第6期
论文作者：Ping Yang Ning Li Junjiang Teng Jian Wu Hao Ma
文章页码：594 - 601
摘 要：Perovskite-type oxides La0.7Ce0.3Ni0.7Fe0.3O3（LCNF） were synthesized by polystyrene colloidal crystal templating（LCNF-CCT） and polystyrene polymer templating（LCNF-PS） through co-precipitation. The structure and physicochemical properties of the obtained oxides were investigated by scanning electron microscopy, X-ray diffraction, N2 adsorption-desorption, Fourier transform infrared spectrometry, H2 temperature-programmed reduction and H2 temperature-programmed desorption, as well as X-ray photoelectron spectroscopy. The results show that the as-synthesized LCNF-CCT perovskite possesses large specific surface area and regular pore size distribution. In addition, the formation of additional oxygen vacancies on the surface favors the migration of lattice oxygen from the bulk phase to the surface and production of more metallic sites, thus improving the activity and resistance to carbon deposition of catalysts in ethanol steam reforming reaction.
Ping Yang1,2，Ning Li1，Junjiang Teng1，Jian Wu2，Hao Ma1
1. College of Chemical Engineering,Guangdong University of Petrochemical Technology2. College of Chemical Engineering,Xiangtan University
摘 要：Perovskite-type oxides La0.7Ce0.3Ni0.7Fe0.3O3（LCNF） were synthesized by polystyrene colloidal crystal templating（LCNF-CCT） and polystyrene polymer templating（LCNF-PS） through co-precipitation. The structure and physicochemical properties of the obtained oxides were investigated by scanning electron microscopy, X-ray diffraction, N2 adsorption-desorption, Fourier transform infrared spectrometry, H2 temperature-programmed reduction and H2 temperature-programmed desorption, as well as X-ray photoelectron spectroscopy. The results show that the as-synthesized LCNF-CCT perovskite possesses large specific surface area and regular pore size distribution. In addition, the formation of additional oxygen vacancies on the surface favors the migration of lattice oxygen from the bulk phase to the surface and production of more metallic sites, thus improving the activity and resistance to carbon deposition of catalysts in ethanol steam reforming reaction.
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