High Structure Sensitivity of Vapor-Phase Furfural Decarbonylation/Hydrogenation Reaction Network as a Function of Size and Shape of Pt Nanoparticles

Nano Letters ◽  
2012 ◽  
Vol 12 (10) ◽  
pp. 5196-5201 ◽  
Author(s):  
Vladimir V. Pushkarev ◽  
Nathan Musselwhite ◽  
Kwangjin An ◽  
Selim Alayoglu ◽  
Gabor A. Somorjai
Keyword(s):  
Vapor Phase ◽  
Reaction Network ◽  
Pt Nanoparticles ◽  
Hydrogenation Reaction ◽  
Structure Sensitivity ◽  
Size And Shape ◽  
High Structure

scholarly journals Nano CoO-Cu-MgO catalyst for vapor phase simultaneous synthesis of ortho-chloroaniline and γ-butyrolactone from ortho-cholonitrobenzne and 1,4-butanediol

2019 ◽  
Vol 2 (3) ◽  
Author(s):  
Hari Prasad Reddy Kannapu 1,2,3 ◽  
Young-Woong Suh2,3 ◽  
Veeralakshmi Vaddeboina 1 ◽  
Anand Narani 1 ◽  
David Raju Burri 1 ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Vapor Phase ◽  
Hydrogenation Reaction ◽  
High Yield ◽  
Hydrogen Economy ◽  
Coupling Process ◽  
Hydrogen Consumption ◽  
Simultaneous Synthesis ◽  
Co Precipitation

Aiming at developing an efficient catalysts for simultanoius hydrogenation of o-chloronitrobenzene to o-chloroaniline and 1,4-butanediol dehydrogenation to  γ-butyrolactone. A series of CoO-Cu-MgO catalysts, composed of 10 wt% of copper, various amount of cobalt loadings (1, 5 and 10 wt%) and remaining of MgO were developed by co-precipitation followed by thermal treatment. o-Chloroaniline and γ-butyrolactone were the main products with high yield of 85% and 90%, respectively. The advantage of the coupling process is that the hydrogenation reaction was conducted without external hydrogen, indicating minimise the hydrogen consumption which is also known as hydrogen economy route. From N2O characterization results, the high activtiy of 5CoO-10Cu-MgO was found to have high amount of Cu species (Cu0/Cu+1) species and govern the stable activity and selectivity on time on stream study in presence of cobalt in Cu-MgO.

Fabrication of Platinum Nanoparticles through Ionic Liquid Method and its Catalytic Properties in Hydrogenation Reaction

2013 ◽  
Vol 745-746 ◽  
pp. 84-89
Author(s):  
Liu Liu Ding ◽  
Guo Jian Jiang ◽  
Wen Jun Li ◽  
Yun Ying Liu ◽  
Jia Yue Xu
Keyword(s):  
Ionic Liquid ◽  
Hydrogen Pressure ◽  
Room Temperature ◽  
Catalytic Properties ◽  
Pt Nanoparticles ◽  
Hydrogenation Reaction ◽  
Room Temperature Ionic Liquid ◽  
Structure And Morphology ◽  
Mean Diameter ◽  
The Mean

Room temperature ionic liquid [1-butyl-3-methylimidazoliuBF4 was prepared under microwave irradiation. Platinum (Pt) nanoparticles were synthesized in the ionic liquid with ethanol as reductant. The structure and morphology of the Pt nanoparticles were characterized by SEM, FTIR and TG-DTA. The results show that the mean diameter of the nanoparticles was about 10nm and the surface was modified with the room temperature ionic liquid. The catalytic property was evaluated by hydrogenation of benzaldehyde in ethanol and the conversion reached up to 80% under hydrogen pressure.

scholarly journals Preparation of Highly Dispersed Pt Nanoparticles Supported on Zeolite-templated Carbon and Catalytic Application in Hydrogenation Reaction

2014 ◽  
Vol 43 (11) ◽  
pp. 1794-1796 ◽  
Author(s):  
Chuanxia Jiang ◽  
Kenji Hara ◽  
Kotaro Namba ◽  
Hirokazu Kobayashi ◽  
Somlak Ittisanronnachai ◽  
...  
Keyword(s):  
Pt Nanoparticles ◽  
Hydrogenation Reaction ◽  
Catalytic Application ◽  
Highly Dispersed ◽  
Templated Carbon

scholarly journals Crystal size and shape analysis of Pt nanoparticles in two and three dimensions

2006 ◽  
Vol 26 ◽  
pp. 367-370 ◽  
Author(s):  
L Cervera Gontard ◽  
R E Dunin-Borkowski ◽  
D Ozkaya ◽  
T Hyde ◽  
P A Midgley ◽  
...  
Keyword(s):  
Shape Analysis ◽  
Crystal Size ◽  
Pt Nanoparticles ◽  
Three Dimensions ◽  
Size And Shape

scholarly journals Formation of COMs through CO hydrogenation on interstellar grains

2020 ◽  
Vol 634 ◽  
pp. A52 ◽  
Author(s):  
M. A. J. Simons ◽  
T. Lamberts ◽  
H. M. Cuppen
Keyword(s):  
Ethylene Glycol ◽  
Gas Phase ◽  
Low Temperatures ◽  
Interstellar Dust ◽  
Co Hydrogenation ◽  
Methyl Formate ◽  
Kinetic Monte Carlo ◽  
Reaction Network ◽  
Positional Information ◽  
Hydrogenation Reaction

Context. Glycoaldehyde, ethylene glycol, and methyl formate are complex organic molecules that have been observed in dark molecular clouds. Because there is no efficient gas-phase route to produce these species, it is expected that a low-temperature surface route existst that does not require energetic processing. CO hydrogenation experiments at low temperatures showed that this is indeed the case. Glyoxal can form through recombination of two HCO radicals and is then further hydrogenated. Aims. Here we aim to constrain the methyl formate, glycolaldehyde, and ethylene glycol formation on the surface of interstellar dust grains through this cold and dark formation route. We also probe the dependence of the grain mantle composition on the initial gas-phase composition and the dust temperature. Methods. A full CO hydrogenation reaction network was built based on quantum chemical calculations for the rate constants and branching ratios. This network was used in combination with a microscopic kinetic Monte Carlo simulation to simulate ice chemistry, taking into account all positional information. After benchmarking the model against CO-hydrogenation experiments, simulations under molecular cloud conditions were performed. Results. Glycoaldehyde, ethylene glycol, and methyl formate are formed in all interstellar conditions we studied, even at temperatures as low as 8 K. This is because the HCO + HCO reaction can occur when HCO radicals are formed close to each other and do not require to diffuse. Relatively low abundances of methyl formate are formed. The final COM abundances depend more on the H-to-CO ratio and less on temperature. Only above 16 K, where CO build-up is less efficient, does temperature start to play a role. Molecular hydrogen is predominantly formed through abstraction reactions on the surface. The most important reaction leading to methanol is H2CO + CH3O → HCO + CH3OH. Our simulations are in agreement with observed COM ratios for mantles that have been formed at low temperatures.

scholarly journals Selective Vapor-Phase Doping of Pt Nanoparticles into Phase-Controlled Nanoalloys

2022 ◽  
Author(s):  
Nithin Poonkottil ◽  
Ranjith K. Ramachandran ◽  
Eduardo Solano ◽  
Nadadur Veeraraghavan Srinath ◽  
Ji-Yu Feng ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Pt Nanoparticles

Vapor Phase Synthesis of Pt Nanoparticles on Carbon Nanotube-Active Carbon Hierarchical Composites

2019 ◽  
Vol 25 (8) ◽  
pp. 763-770 ◽  
Author(s):  
Chen Jin ◽  
Marie Holz ◽  
Wei Xia ◽  
Bastian Mei ◽  
Shankhamala Kundu ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Vapor Phase ◽  
Active Carbon ◽  
Pt Nanoparticles ◽  
Phase Synthesis ◽  
Hierarchical Composites ◽  
Vapor Phase Synthesis
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