scholarly journals Selective Hydrogenation of p-Chloronitrobenzene on Nanosized PdNiB Catalysts

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Yu-Wen Chen ◽  
Der-Shing Lee
Keyword(s):  
Particle Size ◽  
High Activity ◽  
Selective Hydrogenation ◽  
Electronic Effect ◽  
Ensemble Effect

A series of PdNiB bimetallic nanoalloy catalysts with various Pd contents was prepared. Pd was well dispersed in NiB. Even adding a small amount of Pd in NiB had a significant effect on activity and selectivity in hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline (p-CAN). High activity and selectivity on PdNiB could be attributed to both ensemble effect and electronic effect. The particle size in PdNiB decreased with an increase in Pd content. Electron-enriched Ni could activate the polar-NO2 groups of p-CNB and depress the dehalogenation of p-CAN.

Particle size effects in the selective hydrogenation of cinnamaldehyde over supported palladium catalysts

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75541-75551 ◽  
Author(s):  
Feng Jiang ◽  
Jian Cai ◽  
Bing Liu ◽  
Yuebing Xu ◽  
Xiaohao Liu
Keyword(s):  
Particle Size ◽  
Size Effect ◽  
Selective Hydrogenation ◽  
Size Effects ◽  
Palladium Catalysts ◽  
Particle Size Effect ◽  
Particle Size Effects ◽  
Supported Palladium Catalysts ◽  
Supported Palladium ◽  
Palladium Particles

Palladium particles of different sizes obtained directly and indirectly by various methods were studied to clarify the particle size effect in the selective hydrogenation of cinnamaldehyde (CAL).

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.

scholarly journals Bimetallic Au–Pd alloy nanoparticles supported on MIL-101(Cr) as highly efficient catalysts for selective hydrogenation of 1,3-butadiene

RSC Advances ◽  
2020 ◽  
Vol 10 (55) ◽  
pp. 33417-33427
Author(s):  
Lili Liu ◽  
Xiaojing Zhou ◽  
Luxia Guo ◽  
Shijuan Yan ◽  
Yingjie Li ◽  
...  
Keyword(s):  
High Activity ◽  
Selective Hydrogenation ◽  
Hydrogenation Reaction ◽  
Alloy Nanoparticles ◽  
Highly Efficient ◽  
Alloy Particles ◽  
Pd Alloy ◽  
Butadiene Hydrogenation

Bimetallic Au–Pd alloy particles stabilized by MIL-101(Cr) showed high activity and butene selectivity for 1,3-butadiene hydrogenation reaction.

Reduction of SSI by Hydrogen and its Microscopic Morphology

2012 ◽  
Vol 487 ◽  
pp. 672-676
Author(s):  
Jun Guo Li ◽  
Wei Tian ◽  
Shou Zhang Li
Keyword(s):  
Particle Size ◽  
Compressive Strength ◽  
Wastewater Treatment ◽  
High Activity ◽  
Iron Content ◽  
Sponge Iron ◽  
Reduction Temperature ◽  
Microscopic Morphology ◽  
Uniform Particle Size

Spherical sponge iron (SSI) with high activity and intension possesses potential characteristics to be utilized as wastewater treatment material, such as higher iron content, uniform particle size, higher compressive strength, etc. Observation on apparent morphology of exterior and microscopic morphology of SSI reduced by hydrogen under different temperature was carried on with SEM. When the reductive temperature was relatively lower than T4, the quantities of iron grain in exterior and interior of SSI increased with the increasing of temperature. When the temperature was elevated to T5, the particle size of iron grain was increased, and lots of macro-holes formed, especially in the interior section of SSI. When the temperature was T4, the SSI possesses more favorable ability to remove pollutant from wastewater. Moreover, the iron content in SSI was mostly reach to the summit under this temperature. In summarization, the reduction temperature should be controlled under T4 temperature if the sponge iron was utilized in wastewater treatment.

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