scholarly journals Selective Hydrogenation Properties of Ni-Based Bimetallic Catalysts

Eng ◽  
2022 ◽  
Vol 3 (1) ◽  
pp. 60-77
Author(s):  
Nobutaka Yamanaka ◽  
Shogo Shimazu
Keyword(s):  
High Activity ◽  
Selective Hydrogenation ◽  
Electronic Structures ◽  
Bimetallic Catalysts ◽  
Bimetallic Nanoparticles ◽  
Ni Catalyst ◽  
Electronic Effects ◽  
Catalytic Systems ◽  
Chemoselective Hydrogenation ◽  
Hydrogenation Reactions

Metallic Ni shows high activity for a variety of hydrogenation reactions due to its intrinsically high capability for H2 activation, but it suffers from low chemoselectivity for target products when two or more reactive functional groups are present on one molecule. Modification by other metals changes the geometric and electronic structures of the monometallic Ni catalyst, providing an opportunity to design Ni-based bimetallic catalysts with improved activity, chemoselectivity, and durability. In this review, the hydrogenation properties of these catalysts are described starting from the typical methods of preparing Ni-based bimetallic nanoparticles. In most cases, the reasons for the enhanced catalysis are discussed based on the geometric and electronic effects. This review provides new insights into the development of more efficient and well-structured non-noble metal-based bimetallic catalytic systems for chemoselective hydrogenation reactions.

On the Promoting Role of Ag in Selective Hydrogenation Reactions over Pd−Ag Bimetallic Catalysts:  A Theoretical Study

2007 ◽  
Vol 111 (18) ◽  
pp. 6852-6856 ◽  
Author(s):  
Silvia González ◽  
Konstantin M. Neyman ◽  
Shamil Shaikhutdinov ◽  
Hans-Joachim Freund ◽  
Francesc Illas
Keyword(s):  
Selective Hydrogenation ◽  
Bimetallic Catalysts ◽  
Theoretical Study ◽  
Hydrogenation Reactions

Effect of ultra-low amount of gold in oxide-supported bimetallic Au-Fe and Au-Cu catalysts on liquid-phase aerobic glycerol oxidation in water

2021 ◽  
Author(s):  
Elena Redina ◽  
Gennady Kapustin ◽  
Olga Petrovna Tkachenko ◽  
Alexander Avraamovich Greish ◽  
Leonid Kustov
Keyword(s):  
Liquid Phase ◽  
High Activity ◽  
Bimetallic Catalysts ◽  
Glycerol Oxidation ◽  
Catalytic Systems ◽  
Cu Catalysts

Low-loaded Au-Fe and Au-Cu bimetallic catalysts with an Au content of 0.025-0.5% wt supported on TiO2 and CeO2 were prepared. The obtained catalytic systems revealed a unique high activity in...

Au-Rh and Au-Pd Nanoalloys supported on well-defined Rutile Titania Nanorods for Aromatics Hydrogenation Applications

2014 ◽  
Vol 1641 ◽  
Author(s):  
Zere Konuspayeva ◽  
Gilles Berhault ◽  
Pavel Afanasiev ◽  
Thanh-Son Nguyen ◽  
Ali Auyezov ◽  
...  
Keyword(s):  
Bimetallic Catalysts ◽  
Bimetallic Nanoparticles ◽  
Alloy Structure ◽  
Catalytic Systems ◽  
Impregnation Technique ◽  
Vis Spectroscopy ◽  
Metal Support ◽  
Rutile Titania ◽  
Acidic Conditions ◽  
Metal Support Interactions

ABSTRACTTiO2-supported bimetallic Au-Rh and Au-Pd nanocrystals were synthesized using both impregnation and colloidal approaches employing HAuCl4 and RhCl3 as precursors. The as-obtained bimetallic catalysts were then supported onto TiO2 rutile nanorods in order to provide catalytic systems with well-defined metal-support interactions for HRTEM characterization. The results revealed the superiority of the colloidal approach over the impregnation technique to obtain bimetallic nanoparticles (4 nm in size) with tunable composition. However, for Au-Rh/TiO2, optimization of the procedure of the sol immobilization onto the TiO2 support was required to avoid possible Rh re-dissolution. Preparation of Au-Pd/TiO2 followed the same procedure but with more acidic conditions necessary to perform immobilization on the support. UV-vis spectroscopy and XRD results suggest formation of a Rh-rich shell over an Au core center for Au-Rh NPs, while Au-Pd NPs present a pure alloy structure. Au-Rh/TiO2 was used for performing the high-pressure hydroconversion of tetralin in the presence or not of H2S. The results indicate a strong thioresistance induced by the addition of Au to Rh.

Mild and selective hydrogenation of nitriles into primary amines over a supported Ni catalyst

2020 ◽  
Vol 44 (2) ◽  
pp. 549-555 ◽  
Author(s):  
Jianjian Wang ◽  
Qingjie Tang ◽  
Shiwei Jin ◽  
Yanxin Wang ◽  
Ziliang Yuan ◽  
...  
Keyword(s):  
High Activity ◽  
Selective Hydrogenation ◽  
Primary Amines ◽  
Ni Catalyst ◽  
Mild Conditions ◽  
Supported Ni Catalyst ◽  
Supported Ni ◽  
Hydrogenation Of Nitriles

The mesoporous Al2O3 supported Ni catalyst demonstrated a high activity and selectivity for the hydrogenation of nitriles into primary amines under the mild conditions (60–80 °C and 2.5 bar H2) with ammonia as the additive.

Chemoselective Hydrogenation of Cinnamaldehyde over Tailored Oxygen Vacancy Rich Pd@ZrO2 Catalyst

2021 ◽  
Author(s):  
Komal N. Patil ◽  
Divya Prasad ◽  
Jayesh T. Bhanushali ◽  
Bhalchandra Kakade ◽  
Arvind H. Jadhav ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Selective Hydrogenation ◽  
Oxygen Vacancies ◽  
Synthesis Method ◽  
Chemoselective Hydrogenation ◽  
Zro2 Catalyst ◽  
Industrial Relevance

Selective hydrogenation of cinnamaldehyde to hydrocinnamaldehyde is captivating due to its industrial relevance. Herein, two-step synthesis method was adopted to develop oxygen vacancies in Pd@ZrO2 catalysts. The oxygen vacancies were...

Ceria-Based Catalysts for Selective Hydrogenation Reactions: A Critical Review

2021 ◽  
Author(s):  
Kourosh Razmgar ◽  
Mohammednoor Altarawneh ◽  
Ibukun Oluwoye ◽  
Gamini Senanayake
Keyword(s):  
Selective Hydrogenation ◽  
Critical Review ◽  
Hydrogenation Reactions

scholarly journals The synthesis and application of novel Ni(ii) N-alkyl dipyridylaldiminato complexes as selective ethylene oligomerisation catalysts

2014 ◽  
Vol 43 (26) ◽  
pp. 9892-9900 ◽  
Author(s):  
Andrew J. Swarts ◽  
Selwyn F. Mapolie
Keyword(s):  
High Activity ◽  
Catalyst Activity ◽  
Electronic Effects ◽  
Activation Pathways

A series of dinuclear Cl-bridged Ni(ii) complexes, 1a–1e, ligated by N-alkyl 2,2′-dipyridylamine ligands displayed high activity in ethylene oligomerisation, when activated with alkyl aluminium reagents. Steric and electronic effects as well as activation pathways were found to have a significant impact on catalyst activity and selectivity.

scholarly journals High-Active Metallic-Activated Carbon Catalysts for Selective Hydrogenation

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Nicolás Carrara ◽  
Carolina Betti ◽  
Fernando Coloma-Pascual ◽  
María Cristina Almansa ◽  
Laura Gutierrez ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Selective Hydrogenation ◽  
Nickel Catalysts ◽  
Metallic Phase ◽  
Hydrogen Chemisorption ◽  
Electronic Effects ◽  
X Ray ◽  
Mild Conditions ◽  
Temperature Programmed ◽  
Carbon Catalysts

A series of low-loaded metallic-activated carbon catalysts were evaluated during the selective hydrogenation of a medium-chain alkyne under mild conditions. The catalysts and support were characterized by ICP, hydrogen chemisorption, Raman spectroscopy, temperature-programmed desorption (TPD), temperature-programmed reduction (TPR), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR micro-ATR), transmission electronic microscopy (TEM), and X-ray photoelectronic spectroscopy (XPS). When studying the effect of the metallic phase, the catalysts were active and selective to the alkene synthesis. NiCl/C was the most active and selective catalytic system. Besides, when the precursor salt was evaluated, PdN/C was more active and selective than PdCl/C. Meanwhile, alkyne is present in the reaction media, and geometrical and electronic effects favor alkene desorption and so avoid their overhydrogenation to the alkane. Under mild conditions, nickel catalysts are considerably more active and selective than the Lindlar catalyst.

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