Highly Dispersed PdNPs/α-Al2O3 Catalyst for the Selective Hydrogenation of Acetylene Prepared with Monodispersed Pd Nanoparticles

作者：Zhang, Huoli; Wang, Youchao; Wang, Yan; Cao, Jianliang; Kang, Peng; Tang, Qingjie; Ma, Mingjie

来源：Catalysts, 2017, 7(5): 128.

DOI：10.3390/catal7050128

• monodispersed Pd nanoparticles
• acetylene conversion
• selective hydrogenation
• alpha-Al2O3 support
• heterogeneous catalysis

Pd nanoparticles (PdNPs) stabilized by methyl cellulose (MC) were synthesized in an aqueous solution, which are monodispersed nanoparticles. PdNPs/alpha-Al2O3 catalyst was prepared with monodispersed PdNPs and showed better catalytic performance than Pd/alpha-Al2O3 catalyst prepared by the incipient wetness impregnation method using Pd(NO3)(2) as a precursor. The catalysts were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD) and inductively coupled plasma mass spectrometry (ICP-MS). It was found that monodispersed PdNPs were spherical or elliptical nanoparticles with exposed (111) and (100) facets, and the PdNPs/alpha-Al2O3 catalyst showed a more concentrated distribution of Pd particles on the surface of alpha-Al2O3 support than the Pd/alpha-Al2O3 catalyst. The preparation method achieved the highly dispersed PdNPs/alpha-Al2O3 catalyst with smaller Pd particle size and decreased the aggregation of Pd active sites, which was responsible for higher acetylene conversion and ethylene selectivity.

• 出版日期2017-5
• 单位河南理工大学