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Feng Y.-S.,Hefei University of Technology | Feng Y.-S.,Hefei University | Feng Y.-S.,Anhui Provincial Laboratory of Heterocyclic Chemistry | Hao J.,Hefei University of Technology | And 4 more authors.
Chinese Chemical Letters | Year: 2015

Several γ-Al2O3 supported Pd-Ni bimetallic nanocatalysts (Pd-Ni (x:y)/Al2O3; where x and y represent the mass ratio of Pd and Ni, respectively) were prepared by the impregnation method and used for selective hydrogenation of cyclopentadiene to cyclopentene. The Pd-Ni/Al2O3 samples were confirmed to generate Pd-Ni bimetallic nanoparticles by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The catalytic activity was assessed in view of the effects of different mass ratios of Pd and Ni, temperature, pressure, etc. Among all the samples, the Pd-Ni (1:1)/Al2O3 (PN-1:1) catalyst showed extremely high catalytic ability. The conversion of cyclopentadiene and selectivity for cyclopentene can be simultaneously more than 90%. © 2015 Hua-Jian Xu.


Feng Y.-S.,Hefei University of Technology | Feng Y.-S.,Hefei University | Feng Y.-S.,Anhui Provincial Laboratory of Heterocyclic Chemistry | Hao J.,Hefei University of Technology | And 4 more authors.
Chinese Chemical Letters | Year: 2015

Several γ-Al2O3 supported Pd-Ni bimetallic nanocatalysts (Pd-Ni (x:y)/Al2O3; where x and y represent the mass ratio of Pd and Ni, respectively) were prepared by the impregnation method and used for selective hydrogenation of cyclopentadiene to cyclopentene. The Pd-Ni/Al2O3 samples were confirmed to generate Pd-Ni bimetallic nanoparticles by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The catalytic activity was assessed in view of the effects of different mass ratios of Pd and Ni, temperature, pressure, etc. Among all the samples, the Pd-Ni (1:1)/Al2O3 (PN-1:1) catalyst showed extremely high catalytic ability. The conversion of cyclopentadiene and selectivity for cyclopentene can be simultaneously more than 90%. © 2015 Hua-Jian Xu.


Wang P.,Hefei University of Technology | Wang P.,Hefei University | Wang P.,Anhui Provincial Laboratory of Heterocyclic Chemistry | Wang G.-Y.,Hefei University of Technology | And 8 more authors.
Catalysis Letters | Year: 2016

Abstract: In this study, palladium (0) nanoparticle supported on mesoporous carbon (Pd/MPC) is prepared by impregnation and H2 reduction. Characterization by XRD, XPS and TEM reveals the mesoporous structure and a high dispersion of palladium nanoparticles (about 4.8 nm) in the mesopores. The catalyst has excellent catalytic activity and stability for Sonogashira reactions of aryl halide (–I, –Br) in aqueous solution. It is noteworthy that Sonogashira reactions of aryl halide (–Cl) can occur by using the novel Pd/MPC catalyst. Meanwhile, the catalyst can be recovered and reused without loss of efficiency until the fifth cycle in water. The fresh catalyst would be of major significance for industrial applications. Graphical Abstract: [Figure not available: see fulltext.] © 2016 Springer Science+Business Media New York


Cheng Z.-F.,Hefei University of Technology | Feng Y.-S.,Hefei University of Technology | Feng Y.-S.,Hefei University | Feng Y.-S.,Anhui Provincial Laboratory of Heterocyclic Chemistry | And 8 more authors.
Green Chemistry | Year: 2016

A general and efficient method for the direct alkynylation of unactivated C(sp3)-H bonds under metal-free conditions is described. The reaction performs smoothly under mild conditions and shows excellent functional-group tolerance. Initial mechanistic investigation indicates that the reaction may involve a radical pathway. © The Royal Society of Chemistry 2016.


Kang Y.,Hefei University of Technology | Kang Y.,Hefei University | Kang Y.,Anhui Provincial Laboratory of Heterocyclic Chemistry | Bu X.,Hefei University of Technology | And 12 more authors.
Catalysis Letters | Year: 2016

Abstract: A series of bimetallic Cu samples (Cu–Pt/SiO2, Cu–Pd/SiO2, Cu–Ag/SiO2, Cu–Ni/SiO2) were prepared by wetness impregnation method, then investigated for hydrogenolysis of glycerol to 1,2-propanediol (1,2-PDO). We furthered the study and found that Cu–Pt/SiO2 got the smallest particle size and greatest dispersion. Besides, it was found that Pt promoted reduction of Cu2+. Compared with other Cu–Pt molar ratio, Cu–Pt/SiO2 (1:0.2) was the preferable catalyst for hydrogenolysis of glycerol to 1,2-PDO. It is worth noting that Cu–Pt/SiO2 presented the highest activity with a 96 % selectivity to 1,2-PDO and a nearly 100 % conversion of glycerol at 473 K, 40 bar initial H2 pressure, 12 h, which is much higher activity than monometallic Cu/SiO2, Pt/SiO2 and other bimetallic Cu samples. Meanwhile, the used Cu–Pt/SiO2 catalyst still preformed high activity. Furthermore, it was found that the presence of Pt decreased the aggregation of particles during the hydrogenolysis of glycerol. Graphical Abstract: [Figure not available: see fulltext.] © 2016 Springer Science+Business Media New York


Feng Y.-S.,Hefei University of Technology | Feng Y.-S.,Anhui Provincial Laboratory of Heterocyclic Chemistry | Feng Y.-S.,Hefei University | Liu C.,Hefei University of Technology | And 16 more authors.
Chemical Engineering Journal | Year: 2015

Biomass glycerol is an important raw material for many available chemicals, such as 1,2-propanediol (1,2-PDO). Hydrogenolysis of glycerol to 1,2-PDO is considered as a sustainable process with renewable potential application. In this paper, a series of bimetallic PdCu-KF/γ-Al2O3 were prepared and the structures of catalysts were characterized by XRD, XPS, TEM and CO2-TPD. By measuring the activity of the catalyst, we found that PdCu-KF/γ-Al2O3 (Pd:Cu:KF=0.05:1:0.5) can be used as an efficient catalyst for hydrogenolysis of glycerol to 1,2-PDO, with 98.3% selectivity and nearly 100% conversion (200°C, 2.5MPa initial H2 pressure, 20h). © 2015 Elsevier B.V.


Feng Y.-S.,Hefei University of Technology | Feng Y.-S.,Hefei University | Feng Y.-S.,Anhui Provincial Laboratory of Heterocyclic Chemistry | Mao L.,Hefei University of Technology | And 3 more authors.
Tetrahedron | Year: 2015

Taking advantage of Pd(OAc)2-catalyzed dinitration reactions with Bi(NO3)3·5H2O in trifluoroethanol (TFE) and trifluoroacetic acid (TFA), we have developed an efficient and practical method for the synthesis of secondary dinitro-aromatic amines. The products could be applied to the preparation of 5-amine-N-methyl-benzimidazolone, the azo-dyes, economic advantages. The method has also been expanded to the dinitration reaction of some tertiary aromatic amines. © 2015 Elsevier Ltd. All rights reserved.


Liu W.-W.,Hefei University of Technology | Feng Y.-S.,Hefei University of Technology | Feng Y.-S.,Hefei University | Feng Y.-S.,Anhui Provincial Laboratory of Heterocyclic Chemistry | And 3 more authors.
Chinese Chemical Letters | Year: 2016

In this work, Pd-Cu/γ-Al2O3 is prepared by the impregnation method and investigated for selective oxygenization of cyclopentene to cyclopentanone. A series of bimetallic Pd-Cu/γ-Al2O3 nanocatalysts were prepared and the structures characterized by XRD, XPS and TEM. We determined that the obtained Pd-Cu/γ-Al2O3 (molar ratio Pd:Cu=5:1) was an efficient catalyst for the oxygenization of cyclopentene to cyclopentanone with >95% selectivity and >85% conversion (100°C, 1MPa initial O2 pressure, 7h). © 2016 Yi-Si Feng.


Wang P.-F.,Hefei University of Technology | Wang X.-Q.,Hefei University of Technology | Dai J.-J.,Hefei University of Technology | Feng Y.-S.,Hefei University of Technology | And 3 more authors.
Organic Letters | Year: 2014

A silver-mediated decarboxylative C-S cross-coupling reaction of aliphatic carboxylic acid is described. This reaction occurs smoothly under mild conditions and shows good tolerance of functional groups. It provides an alternative approach for the synthesis of alkyl aryl sulfides. © 2014 American Chemical Society.

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