摘要
Fe-doped ZrO2 compounds were prepared by a co-precipitation method.The compounds were characterized by X-ray diffraction,N2 adsorption-desorption,ultraviolet diffuse reflectance infrared Fourier transform spectroscopy,scanning electron microscopy-energy-dispersive X-ray spectroscopy,transmission electron microscopy,NH3 temperature-programmed desorption,X-ray photoelectron spectroscopy,and in situ Fourier transform infrared spectroscopy.The incorporation of Fe into ZrO2 lattice favored and effectively stabilized the formation of purely ZrO2 tetragonal phase.Subsequently,the catalytic activity of the Fe-doped ZrO2 compounds was evaluated toward vapor phase methylation of phenol.The catalytic activity was governed by Fe content and related to the Lewis acidity of the prepared catalyst.
采用共沉淀法制备了Fe掺杂的ZrO_2样品,并采用X射线衍射、N_2吸附-脱附、紫外漫反射光谱、扫描电镜-电子能谱、氨程序升温脱附、X射线光电子能谱和原位红外光谱进行了表征.结果表明,Fe进入ZrO_2晶格中有效稳定了其晶相结构为单一的四方相.这些样品可很好地催化苯酚气相甲基化反应,其催化活性取决于Fe含量,并与样品中L酸有关.
