高校化学工程学报2017，Vol.31Issue(6)：1349-1355,7.DOI:10.3969/j.issn.1003-9015.2017.06.013
磷酸根表面修饰对钨锆复合氧化物载铂催化剂的影响
Effects of PO43- Surface Modification on Platinum Catalysts Supported with Tungsten-Zirconium Mixed Oxides
摘要
Abstract
PO43- modified Pt/PO43--WO3-ZrO2 catalysts were prepared via impregnation. The physico-chemical properties of the catalysts were characterized by NH3-temperature programmed desorption (NH3-TPD), infrared spectroscopy (FT-IR), X-ray diffraction (XRD), N2-physical adsorption-desorption (BET), H2 temperature programmed reduction (H2-TPR), H2-pulse adsorption and X-ray photoelectron spectroscopy(XPS). Moreover, the hydrothermal stability of tungsten and zirconium mixed oxides was investigated with autoclave. The prepared catalyst was applied in glycerol hydrogenation to produce 1,3-propanediol in a fixed-bed continuous-flow reactor. The results show that certain PO43- contents can prevent the change of monoclinic zirconia to tetragonal zirconia under hydrothermal treatment, which can also increase hydrothermal stability of tungsten and zirconium mixed oxides. The surface area of 0.72 PO43--WO3-ZrO2 is 83 m2.g-1 before hydrothermal treatment, which becomes 86 m2.g-1 after hydrothermal treatment. The platinum metallicity on the catalyst is enhanced and the catalyst H2-adsorption is improved. The activity of Pt/PO43--WO3-ZrO2 is more stable than that of Pt/WO3-ZrO2.关键词
磷酸根/钨锆复合氧化物/水热稳定性/甘油/氢解/1,3-丙二醇Key words
phosphate/tungsten and zirconium mixed oxides/hydrothermal stability/glycerol分类
生物科学引用本文复制引用
杨笑,陈长林..磷酸根表面修饰对钨锆复合氧化物载铂催化剂的影响[J].高校化学工程学报,2017,31(6):1349-1355,7.基金项目
江苏省产学研前瞻性研究项目(BY2015005-08). （BY2015005-08）
