Au/LaPO4 nanowires: Synthesis, characterization, and catalytic CO oxidation

作者：Liu Huan; Lin Yi; Ma Zhen^*

来源：Journal of the Taiwan Institute of Chemical Engineers, 2016, 62: 275-282.

DOI：10.1016/j.jtice.2016.01.016

• Gold catalysts
• CO oxidation
• Metal phosphates
• LaPO4 nanowires

Au/M-P-O (M=Mg, Al, Ca, Fe, Co, Zn, La) catalysts were prepared by loading ca. 1 wt.% gold onto commercial metal phosphate supports by deposition-precipitation with urea (DPU), and tested in CO oxidation. Au/La-P-O showed the highest activity, achieving complete CO conversion at 70 C. Au/Ca-P-O was the second most active, achieving complete CO conversion at 155 degrees C. The remaining catalysts were not active below 200 C. In view of the results, we additionally prepared Au/LaPO4 nanowires by loading ca. 1 wt.% gold onto LaPO4 nanowires via DPU. The Au/LaPO4 nanowires catalyst was even more active, achieving complete CO conversion at 15 degrees C. The catalysts were characterized by N-2 adsorption-desorption, inductively coupled plasma optical emission spectroscopy (ICP-OES), X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and temperature-programmed desorption of O-2 or CO2 (O-2-TPD, CO2-TPD). Reasons for the higher activity of Au/LaPO4 nanowires were discussed.

• 出版日期2016-5
• 单位复旦大学