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Catalysts 2017, 7(5), 128; doi:10.3390/catal7050128

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

1
School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China
2
State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454000, China
3
Sinopec Beijing Research Institute of Chemical Industry, Beijing 100013, China
*
Author to whom correspondence should be addressed.
Academic Editors: Tian-Yi Ma, Jian-Rong (Jeff) Li and Cláudia Gomes Silva
Received: 28 March 2017 / Revised: 24 April 2017 / Accepted: 25 April 2017 / Published: 28 April 2017
(This article belongs to the Special Issue Nanostructured Materials for Applications in Heterogeneous Catalysis)
View Full-Text   |   Download PDF [17154 KB, uploaded 28 April 2017]   |  

Abstract

Pd nanoparticles (PdNPs) stabilized by methyl cellulose (MC) were synthesized in an aqueous solution, which are monodispersed nanoparticles. PdNPs/α-Al2O3 catalyst was prepared with monodispersed PdNPs and showed better catalytic performance than Pd/α-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/α-Al2O3 catalyst showed a more concentrated distribution of Pd particles on the surface of α-Al2O3 support than the Pd/α-Al2O3 catalyst. The preparation method achieved the highly dispersed PdNPs/α-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. View Full-Text
Keywords: monodispersed Pd nanoparticles; acetylene conversion; selective hydrogenation; α-Al2O3 support; heterogeneous catalysis monodispersed Pd nanoparticles; acetylene conversion; selective hydrogenation; α-Al2O3 support; heterogeneous catalysis
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Zhang, H.; Wang, Y.; Wang, Y.; Cao, J.; Kang, P.; Tang, Q.; Ma, M. Highly Dispersed PdNPs/α-Al2O3 Catalyst for the Selective Hydrogenation of Acetylene Prepared with Monodispersed Pd Nanoparticles. Catalysts 2017, 7, 128.

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