物理化学学报2017，Vol.33Issue(3)：602-610,9.DOI:10.3866/PKU.WHXB201611251
锐钛矿型TiO2担载的Pd催化剂用于乙炔选择加氢的催化性能及其表征
Catalytic Performance and Characterization of Anatase TiO2 Supported Pd Catalysts for the Selective Hydrogenation of Acetylene
摘要
Abstract
Anatase TiO2 nanospindles containing 89％ exposed {101} facets (TiO2-101) and nanosheets with 77％ exposed {001} facets (TiO2-001) were hydrothermally synthesized and used as supports for Pd catalysts.The effects of the TiO2 materials on the catalytic performance of Pd/TiO2-101 and Pd/TiO2-001 catalysts were investigated in the selective hydrogenation of acetylene to polymer-grade ethylene.The Pd/riO2-101 catalyst exhibited enhanced performance in terms of acetylene conversion and ethylene yield.To understand these effects,the catalysts were characterized by H2 temperature-programmed desorption (H2-TPD),H2 temperatureprogrammed reduction (H2-TPR),transmission electron microscopy (TEM),pulse CO chemisorption,X-ray photoelectron spectroscopy (XPS),and thermogravimetric analysis (TGA).The TEM and CO chemisorption results confirmed that Pd nanoparticles (NPs) on the TiO2-101 support had a smaller average particle size (1.53 nm) and a higher dispersion (15.95％) than those on the TiO2-001 support (average particle size of 4.36 nm and dispersion of 9.06％).The smaller particle size and higher dispersion of Pd on the Pd/TiO2-101 catalyst provided more reaction active sites,which contributed to the improved catalytic activity of this supported catalyst.关键词
Pd/TiO2催化剂/乙炔选择加氢/锐钛矿型TiO2/{101}晶面/结构表征Key words
Pd/TiO2 catalyst/Acetylene selective hydrogenation/Anatase TiO2/{101} plane/Structure characterization分类
化学化工引用本文复制引用
高晓平,郭章龙,周亚男,敬方梨,储伟..锐钛矿型TiO2担载的Pd催化剂用于乙炔选择加氢的催化性能及其表征[J].物理化学学报,2017,33(3):602-610,9.基金项目
The project was supported by the National Natural Science Foundation of China (21476145).国家自然科学基金(21476145)资助项目 （21476145）
