scholarly journals Bimetallic nickel-lutetium complexes: tuning the properties and catalytic hydrogenation activity of the Ni site by varying the Lu coordination environment

2019 ◽  
Vol 10 (11) ◽  
pp. 3375-3384 ◽  
Author(s):  
Bianca L. Ramirez ◽  
Prachi Sharma ◽  
Reed J. Eisenhart ◽  
Laura Gagliardi ◽  
Connie C. Lu
Keyword(s):  
Catalytic Activity ◽  
Catalytic Hydrogenation ◽  
Coordination Environment ◽  
Hydrogenation Activity ◽  
Styrene Hydrogenation

Varying the Lu coordination environment tunes the Ni–Lu interaction and the catalytic activity of the Ni site in styrene hydrogenation.

Effects of Promoters on Properties of Cu-Zn-Al Catalyst for Selective Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol

2011 ◽  
Vol 393-395 ◽  
pp. 1185-1188
Author(s):  
Chang You Li ◽  
Xiao Yan Li ◽  
Yi Fei Guo
Keyword(s):  
Catalytic Activity ◽  
Reaction Time ◽  
Catalytic Hydrogenation ◽  
Selective Hydrogenation ◽  
Reaction Rate ◽  
Steric Effect ◽  
Cinnamyl Alcohol ◽  
Active Centers ◽  
Hydrogenation Activity

Cu-Zn-Al catalyst was modified by the additives such as Ni and Mn, and the prepared catalyst was employed in the selective catalytic hydrogenation of cinnamaldehyde. The results showed that the addition of Ni could improve catalytic activity significantly, moreover, the improving effect was highest when Zn was replaced by Ni, simultaneously leading to excessive hydrogenation. The Cu-(5%)Mn-Zn-Al catalyst exhibited a higher selectivity of 93.6% for C = O bond to cinnamyl alcohol and hydrogenation activity of 33.0% conversion at 130°C under 1.0 MPa of H2 pressure with the reaction time of 1 h. TPR and XRD characterization showed that Mn promoter was favorable for the growth of Cu0 fine grains on the surface of catalyst, which not only led to steric effect which improved the selectivity for cinnamyl alcohol, but also reduced the numbers of active centers, consequently decreased the reaction rate.

Ru–Ni/Al2O3 bimetallic catalysts with high catalytic activity for N-propylcarbazole hydrogenation

2020 ◽  
Vol 10 (7) ◽  
pp. 2268-2276 ◽  
Author(s):  
Chenguang Li ◽  
Ming Yang ◽  
Zhenjie Liu ◽  
Zhenlin Zhang ◽  
Ting Zhu ◽  
...  
Keyword(s):  
Activation Energy ◽  
Catalytic Activity ◽  
Catalytic Hydrogenation ◽  
Bimetallic Catalysts ◽  
High Catalytic Activity ◽  
Hydrogenation Activity

The as-prepared 5 wt% Ru2.5Ni2.5/Al2O3 catalyst shows the best catalytic hydrogenation activity for NPCZ and the lowest hydrogenation activation energy.

Liquid-Phase Hydrogenation to 2, 4-Tolylenediamine over Supported HY Catalysts

2012 ◽  
Vol 512-515 ◽  
pp. 2381-2385
Author(s):  
Xue Mei Zhang ◽  
Feng Xing Niu
Keyword(s):  
Catalytic Activity ◽  
Liquid Phase ◽  
Catalytic Hydrogenation ◽  
Active Component ◽  
Experimental Results ◽  
Mass Ratio ◽  
Liquid Phase Hydrogenation ◽  
Catalytic Test

We have successfully prepared a novel passivation Ni/HY catalyst by the technologies of macerate-precipitatio.The catalysts are comprised of two contents: HY as carrier, Ni as active component，and we put it into the process of preparating aromatic amines.The nature of the catalysts was discussed based on the characterization results of BET , IR , SEM , XRD , TEM ,TPD , XPS and TPR . The catalytic hydrogenation technology for 2,4-dinitrobenzene in liquid phase can be an attractive and elegant routine for production of 2,4-tolylenediamine. The catalytic activity is evaluated at 2.2 MPa, 90 °C, 750r/min, solvent with reaction materials mass ratio of 60, catalyst with reaction materials mass ratio of 0.1. In the catalytic test, The experimental results over the catalyst showed that 2,4-dinitrobenzene and 2,4-tolylenediamine conversion and selective of 99.88% and 99.16% were obtained respectively.It is found that the catalyst is highly dispersion, stable, and reusable. No obvious deactivation of the catalyst was observed after repeated using twelve times.

scholarly journals Rhodium nanoparticles stabilized by ferrocenyl-phosphine ligands: synthesis and catalytic styrene hydrogenation

2019 ◽  
Vol 48 (20) ◽  
pp. 6777-6786 ◽  
Author(s):  
M. Ibrahim ◽  
M. M. Wei ◽  
E. Deydier ◽  
E. Manoury ◽  
R. Poli ◽  
...  
Keyword(s):  
Catalytic Hydrogenation ◽  
Phosphine Ligands ◽  
Rhodium Nanoparticles ◽  
Styrene Hydrogenation

A series of ferrocenyl-phosphine ligands has been used to stabilize small rhodium nanoparticles that are active in the catalytic hydrogenation of styrene.

Nickel(ii) and nickel(0) complexes as precursors of nickel nanoparticles for the catalytic hydrogenation of benzonitrile

2020 ◽  
Vol 44 (3) ◽  
pp. 1082-1089
Author(s):  
Alejandro A. Rodríguez ◽  
Jorge A. Garduño ◽  
Juventino J. García
Keyword(s):  
Catalytic Activity ◽  
Catalytic Hydrogenation ◽  
Nickel Nanoparticles

The use of nickel(ii) and nickel(0) complexes as precursors of nickel nanoparticles with catalytic activity in the hydrogenation of benzonitrile is reported.

High performance multifunctional green Co3O4 spinel nanoparticles: photodegradation of textile dye effluents, catalytic hydrogenation of nitro-aromatics and antibacterial potential

2017 ◽  
Vol 16 (5) ◽  
pp. 766-778 ◽  
Author(s):  
S. K. Jesudoss ◽  
J. Judith Vijaya ◽  
P. Iyyappa Rajan ◽  
K. Kaviyarasu ◽  
M. Sivachidambaram ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Hydrogenation ◽  
High Performance ◽  
Punica Granatum ◽  
Seed Extract ◽  
Textile Dye ◽  
Nitro Aromatics ◽  
Pomegranate Seed ◽  
Antibacterial Potential ◽  
Spinel Nanoparticles

The multifunctional catalytic activity of Co3O4 spinel nanoparticles, synthesized using Punica granatum (pomegranate) seed extract was evaluated for its multiple applications.

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