Ultrafine Ni2P Nanoparticle-Decorated r-GO: A Novel Liquid-Phase Approach and Dibenzothiophene Hydro-desulfurization

Vasileios Tzitzios, Vishnu Pillai, Christina Gioti, Marios Katsiotis, Thomas Karagiannis, Dimitrios Gournis, Michael A. Karakassides, Saeed Alhassan

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Nanostructured transition metal phosphides, in the last few years, have attracted increased scientific interest, due to their unique physicochemical properties. Nickel phosphide nanoparticles, with controllable crystal structures, from metal-rich tetragonal Ni12P5 to phosphorous-rich hexagonal Ni2P, and hexagonal close-packed (hcp) Ni2P-decorated reduced graphene oxide (r-GO) nanohybrid materials have been synthesized via a novel one-step liquid-phase approach in primary-tertiary aliphatic amine mixtures. The nanoparticles are monodispersed, have a spherical shape and a controllable size in the sub-10 nm regime, and uniformly decorate the surface of r-GO, leading to the formation of Ni2P/r-GO hybrid materials. The materials were characterized using powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and Raman spectroscopy and catalytically evaluated for the dibenzothiophene hydro-desulfurization (HDS) reaction. The results clearly demonstrated that the role of the tertiary amine is crucial for the phosphidation process. In addition, r-GO has been proven to be ideal alternative support to the traditional inorganic ones for the immobilization of the catalytically active component, preventing significant sintering effects.

Original languageBritish English
Pages (from-to)4300-4309
Number of pages10
JournalIndustrial and Engineering Chemistry Research
Volume60
Issue number11
DOIs
StatePublished - 24 Mar 2021

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