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A Stepwise Loading Method to Magnetically Responsive Pt-Fe3O 4/MCNT Catalysts for Selective Hydrogenation of 3-methylcrotonaldehyde

A Stepwise Loading Method to Magnetically Responsive Pt-Fe3O 4/MCNT Catalysts for Selective Hydrogenation of 3-methylcrotonaldehyde

Shaofei Song, Jianyan Yu, Qiang Xiao, Xiangrong Ye, Yijun Zhong, Weidong Zhu

Nanoscale Res Lett. 2014 Dec;9(1):2498.

PMID: 26089005

Abstract:

Pt-loaded multi-walled carbon nanotubes (Pt/MCNTs) and magnetically responsive Pt-Fe3O4/MCNT catalysts were prepared by a stepwise loading of preformed Pt and Fe3O4 nanoparticles onto multi-walled carbon nanotubes (MCNTs). The structure, composition, and magnetism of the catalysts were characterized by X-ray diffraction (XRD), TEM, H2-O2 titration, inductively coupling plasma-atomic emission spectroscopy (ICP-AES), and superconducting quantum interference device (SQUID) techniques. Ascribed to the well-controlled particle size in the preformed Pt colloids, Pt particles in the consequent Pt/MCNT and Pt-Fe3O4/MCNT catalysts are of high uniformity and dispersion. The prepared Pt catalysts show an excellent catalytic performance in the liquid phase hydrogenation of 3-methylcrotonaldehyde, one of typical α,β-unsaturated aldehydes. A very high selectivity to 3-methylcrotonalcohol of 98% at a conversion of about 80% was available on the magnetic Pt-Fe3O4/MCNT catalyst. The magnetic catalyst, with good superparamagnetism, can be easily recovered from the liquid phase system under the external magnetic field. Moreover, both the Pt/MCNT and magnetic Pt-Fe3O4/MCNT catalysts show a good recyclability, confirmed by five cycles of reusage.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP107868	3-Methylcrotonaldehyde		107-86-8	Price

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