Tuning the Catalytic Performance of Cobalt Nanoparticles by Tungsten Doping for Efficient and Selective Hydrogenation of Quinolines under Mild Conditions

ACS Catalysis ◽  
2021 ◽  
pp. 8197-8210
Author(s):  
Marta Puche ◽  
Lichen Liu ◽  
Patricia Concepción ◽  
Iván Sorribes ◽  
Avelino Corma
Keyword(s):  
Selective Hydrogenation ◽  
Catalytic Performance ◽  
Cobalt Nanoparticles ◽  
Mild Conditions ◽  
Tungsten Doping

Effects of impregnation solvent and reduction temperature on the catalytic performance of Pd/Al2O3 in the selective hydrogenation of 1,3-butadiene

2011 ◽  
Vol 103 (2) ◽  
pp. 405-417 ◽  
Author(s):  
Kanda Pattamakomsan ◽  
Francisco Jose Cadete Santos Aires ◽  
Kongkiate Suriye ◽  
Joongjai Panpranot
Keyword(s):  
Selective Hydrogenation ◽  
Catalytic Performance ◽  
Reduction Temperature

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.

scholarly journals Ultra-Small Pd(0) Nanoparticles into a Designed Semisynthetic Lipase: An Efficient and Recyclable Heterogeneous Biohybrid Catalyst for the Heck Reaction under Mild Conditions

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2358 ◽  
Author(s):  
David Lopez-Tejedor ◽  
Blanca de las Rivas ◽  
Jose M. Palomo
Keyword(s):  
Catalytic Activity ◽  
Protein Structure ◽  
Heck Reaction ◽  
Catalytic Performance ◽  
Reducing Agent ◽  
Chemically Modified ◽  
Mild Conditions ◽  
In Situ Formation ◽  
Geobacillus Thermocatenulatus

A novel heterogeneous enzyme-palladium (Pd) (0) nanoparticles (PdNPs) bionanohybrid has been synthesized by an efficient, green, and straightforward methodology. A designed Geobacillus thermocatenulatus lipase (GTL) variant genetically and then chemically modified by the introduction of a tailor-made cysteine-containing complementary peptide- was used as the stabilizing and reducing agent for the in situ formation of ultra-small PdNPs nanoparticles embedded on the protein structure. This bionanohybrid was an excellent catalyst in the synthesis of trans-ethyl cinnamate by Heck reaction at 65 °C. It showed the best catalytic performance in dimethylformamide (DMF) containing 10–25% of water as a solvent but was also able to catalyze the reaction in pure DMF or with a higher amount of water as co-solvent. The recyclability and stability were excellent, maintaining more than 90% of catalytic activity after five cycles of use.

scholarly journals The selective hydrogenation of furfural over supported palladium nanoparticle catalysts prepared by sol-immobilisation: effect of catalyst support and reaction conditions

2018 ◽  
Vol 8 (1) ◽  
pp. 252-267 ◽  
Author(s):  
Reem Albilali ◽  
Mark Douthwaite ◽  
Qian He ◽  
Stuart H. Taylor
Keyword(s):  
Selective Hydrogenation ◽  
Catalyst Support ◽  
Palladium Nanoparticle ◽  
Reaction Conditions ◽  
Nanoparticle Catalysts ◽  
Mild Conditions ◽  
Supported Palladium

Pd-TiO2 nanoparticles prepared by sol-immobilisation are very active for selective hydrogenation of furfural under mild conditions, and addition of Pt enhances performance to achieve a 95% yield of tetrahydrofurfuryl alcohol.

scholarly journals Pd–Ni Bimetallic Nanoparticles Supported on Zro2 as an Efficient Catalyst for Suzuki–Miyaura Reactions

2018 ◽  
Vol 42 (8) ◽  
pp. 419-423
Author(s):  
Li-Jie Zhang ◽  
Xian Yao ◽  
Ying-xin Sun ◽  
Jia-wei Zhang ◽  
Chun Cai
Keyword(s):  
Reduction Method ◽  
Bimetallic Nanoparticles ◽  
Bimetallic Catalyst ◽  
Cross Coupling ◽  
Catalytic Performance ◽  
Coupling Reactions ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Cross Coupling Reactions ◽  
Excellent Catalytic Performance

Pd–Ni bimetallic nanoparticles (BMNPs) supported on ZrO2 were prepared by an impregnation–reduction method. The BMNPs showed excellent catalytic performance in Suzuki carbon–carbon cross-coupling reactions and almost quantitative conversion of the substrates was obtained under mild conditions in the absence of ligand. The excellent catalytic performance of the bimetallic catalyst could be a result of the synergistic effect between the two metal components. The catalyst showed outstanding recyclability during the reaction process; no obvious decrease in catalytic performance was observed after five cycles.

The Effect of Ni Precursor Salts on Diatomite Supported Ni-Mg Catalysts in Methanation of CO2

2021 ◽  
Vol 1016 ◽  
pp. 1417-1422
Author(s):  
Chao Sun ◽  
Jugoslav Krstic ◽  
Vojkan Radonjic ◽  
Miroslav Stankovic ◽  
Patrick da Costa
Keyword(s):  
Catalytic Activity ◽  
Atmospheric Pressure ◽  
Textural Properties ◽  
Catalytic Performance ◽  
Nickel Salt ◽  
Nitrate Salt ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
The Difference ◽  
Supported Ni

This study is aimed to investigate the effect of Ni precursor salts on the properties (textural, phase-structural, reducibility, and basicity), and catalytic performance of diatomite supported Ni-Mg catalyst in methanation of CO2. The NiMg/D-X catalysts derived from various nickel salts (X = S-sulfamate, N-nitrate or A-acetate) were synthesized by the precipitation-deposition (PD) method. The catalysts were characterized by N2-physisorption, XRD, TPR-H2, and TPD-CO2 techniques. The different catalytic activity (conversion) and selectivity, observed in CO2 methanation carried out under relatively mild conditions (atmospheric pressure; temperatures: 250-450 °C) are related and explained by the difference in textural properties, metallic Ni-crystallite size, reducibility, and basicity of studied catalysts. The results showed that catalyst derived from Ni-nitrate salt (NiMg/D-N) is more suitable for the preparation of efficient catalyst for CO2 methanation than its counterparts derived from sulfamate (NiMg/D-S) or acetate (NiMg/D-A) nickel salt. The NiMg/D-N catalyst showed the highest specific surface area and total basicity, and the best catalytic performance with CO2 conversion of 63.3 % and CH4 selectivity of 80.9 % at 450 °C.

Selective hydrogenation of nitroarenes under mild conditions by the optimization of active sites in a well defined Co@NC catalyst

2020 ◽  
Vol 22 (17) ◽  
pp. 5730-5741
Author(s):  
Shuo Chen ◽  
Li-Li Ling ◽  
Shun-Feng Jiang ◽  
Hong Jiang
Keyword(s):  
Particle Size ◽  
Catalytic Hydrogenation ◽  
Selective Hydrogenation ◽  
Active Sites ◽  
Metal Organic Framework ◽  
Nitro Compounds ◽  
Active Species ◽  
Mild Conditions ◽  
Metal Organic ◽  
Aromatic Nitro

The defined catalyst (Co@NC) is prepared through the pyrolysis of the Co-centered metal–organic framework (MOF), in which Co active species (Co–Nx, surface Co NPs) and particle size play important roles in the catalytic hydrogenation of aromatic nitro compounds.

Cobalt–graphene nanomaterial as an efficient catalyst for selective hydrogenation of 5-hydroxymethylfurfural into 2,5-dimethylfuran

2019 ◽  
Vol 9 (6) ◽  
pp. 1329-1333 ◽  
Author(s):  
Fan Yang ◽  
Jingbo Mao ◽  
Shenmin Li ◽  
Jingmei Yin ◽  
Jinxia Zhou ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Selective Hydrogenation ◽  
Catalytic Performance ◽  
Efficient Catalyst ◽  
Reduced Graphene

The synergy of single Co atoms/Co clusters and CoOx nanoparticles, as well as reduced graphene oxide, leads to superior catalytic performance.

Biomolecule-derived supported cobalt nanoparticles for hydrogenation of industrial olefins, natural oils and more in water

2019 ◽  
Vol 21 (18) ◽  
pp. 5104-5112 ◽  
Author(s):  
Anahit Pews-Davtyan ◽  
Florian Korbinian Scharnagl ◽  
Maximilian Franz Hertrich ◽  
Carsten Kreyenschulte ◽  
Stephan Bartling ◽  
...  
Keyword(s):  
Cobalt Nanoparticles ◽  
Mild Conditions ◽  
Natural Oils

Biomolecule modified supported cobalt nanoparticles efficiently hydrogenate diverse natural, industrial and functionalized olefins in water under mild conditions.

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