4.5 Article

Chemoselective hydrogenation of 3-nitrostyrene to 3-aminostyrene over Pt-Bi/TiO2 catalysts

Journal

MOLECULAR CATALYSIS
Volume 432, Issue -, Pages 23-30

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.mcat.2016.12.029

Keywords

Selective hydrogenation; 3-Nitrostyrene; 3-Aminostyrene; Pt-Bi/TiO2

Funding

  1. National Basic Research Program of China [2016YFA0602901]
  2. Natural Science Fund Council of China [NSFC 21202159]
  3. Youth Innovation Promotion Association CAS [2016206]
  4. Jilin province, China [20150301012GX, 201431]

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The selective hydrogenation of a molecule containing several unsaturated groups is a very important issue and has attracted much more attention in the chemical synthesis. Herein, a highly selective catalyst of Pt-Bi/TiO2 was first time developed for the hydrogenation of 3-nitrostyrene (NS) to 3-aminostyrene (AS), with it an excellent selectivity to AS of 96% was achieved at the complete conversion. The influence of Bi on the catalytic performance was well discussed by using X-ray diffraction (XRD), transmission electronic microscopy (TEM), CO pulse chemisorption, hydrogen temperature-programmed reduction (H-2-TPR), X-ray photoelectron spectroscopy (XPS), diffuse reflectance Fourier transform infrared (DRFTIR) spectroscopy of adsorbed CO, and thermo gravimetric analysis (TGA) and experiment data. With increasing Bi loading, Bi-rich surface was formed, and the terraces sites of Pt disappeared as it transferred to the low coordinated Pt gradually. Thus, high selectivity of AS was obtained over Pt-Bi/TiO2 for the hydrogenation of AS to 3-ethylaniline (EA) was lowered. (C) 2017 Elsevier B.V. All rights reserved.

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