Molybdenum carbide nanoparticles within carbon nanotubes as superior catalysts for γ-valerolactone production via levulinic acid hydrogenation

2014 ◽  
Vol 16 (9) ◽  
pp. 4092-4097 ◽  
Author(s):  
Estevão F. Mai ◽  
Marta A. Machado ◽  
Thomas E. Davies ◽  
Jose A. Lopez-Sanchez ◽  
Victor Teixeira da Silva
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Phase ◽  
Levulinic Acid ◽  
Molybdenum Carbide ◽  
Efficient Catalyst ◽  
Supported Molybdenum Carbide ◽  
First Time

We report here for the first time that supported molybdenum carbide is an efficient catalyst to selectively convert levulinic acid into γ-valerolactone in the aqueous phase.

TiO2-supported molybdenum carbide: An active catalyst for the aqueous phase hydrogenation of succinic acid

2019 ◽  
Vol 571 ◽  
pp. 71-81 ◽  
Author(s):  
Marwa Abou Hamdan ◽  
Stéphane Loridant ◽  
Mohamad Jahjah ◽  
Catherine Pinel ◽  
Noémie Perret
Keyword(s):  
Succinic Acid ◽  
Aqueous Phase ◽  
Molybdenum Carbide ◽  
Active Catalyst ◽  
Supported Molybdenum Carbide

Improvement of the catalytic stability of molybdenum carbide via encapsulation within carbon nanotubes in dry methane reforming

2018 ◽  
Vol 8 (3) ◽  
pp. 697-701 ◽  
Author(s):  
Haifeng Gao ◽  
Zhiwei Yao ◽  
Yan Shi ◽  
Siqi Wang
Keyword(s):  
Carbon Nanotubes ◽  
Oxidation Resistance ◽  
Molybdenum Carbide ◽  
Methane Reforming ◽  
Catalytic Stability ◽  
First Time

We reported for the first time the enhancement of the oxidation resistance of Mo2C nanoparticles by encapsulation within carbon nanotubes (CNTs).

Molybdenum carbide as an efficient catalyst for low-temperature hydrogenation of dimethyl oxalate

2016 ◽  
Vol 52 (28) ◽  
pp. 5030-5032 ◽  
Author(s):  
Yanting Liu ◽  
Jian Ding ◽  
Jiaqiang Sun ◽  
Juan Zhang ◽  
Jicheng Bi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Low Temperatures ◽  
Molybdenum Carbide ◽  
Efficient Catalyst ◽  
Dimethyl Oxalate ◽  
Highly Active ◽  
Stable Catalyst ◽  
Supported Molybdenum Carbide

Silica-supported molybdenum carbide (Mo2C/SiO2) is found to be a highly active, selective and stable catalyst for the hydrogenation of dimethyl oxalate to ethanol at low temperatures (473 K).

scholarly journals Supported gold–nickel nano-alloy as a highly efficient catalyst in levulinic acid hydrogenation with formic acid as an internal hydrogen source

2018 ◽  
Vol 8 (17) ◽  
pp. 4318-4331 ◽  
Author(s):  
Agnieszka M. Ruppert ◽  
Marcin Jędrzejczyk ◽  
Natalia Potrzebowska ◽  
Kamila Kaźmierczak ◽  
Magdalena Brzezińska ◽  
...  
Keyword(s):  
Formic Acid ◽  
Levulinic Acid ◽  
Efficient Catalyst ◽  
Highly Efficient ◽  
Internal Hydrogen ◽  
Supported Gold ◽  
First Time

The surface Au–Ni nano-alloy was very efficiently used for the first time for the hydrogenation of levulinic acid with formic acid as an internal hydrogen source.

Incorporation of Multi Wall Carbon Nanotubes into Glass-Surfaces via Laser-Treatment

2003 ◽  
Vol 772 ◽  
Author(s):  
T. Seeger ◽  
G. de la Fuente ◽  
W.K. Maser ◽  
A.M. Benito ◽  
A. Righi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Continuous Wave ◽  
Silica Surface ◽  
Multi Wall Carbon Nanotubes ◽  
Composite Formation ◽  
Multi Walled Carbon Nanotubes ◽  
Glass Surfaces ◽  
Walled Carbon Nanotubes ◽  
First Time ◽  
Scanning Electron

AbstractCarbon nanotubes (CNT) are interesting candidates for the reinforcement in robust composites and for conducting fillers in polymers due to their fascinating electronic and mechanical properties. For the first time, we report the incorporation of multi walled carbon nanotubes (MWNTs) into silica-glass surfaces by means of partial surface-melting caused by a continuous wave Nd:YAG laser. MWNTs were detected being well incorporated in the silica-surface. The composites are characterized using scanning electron microscopy (SEM) and Raman-spectroscopy. A model for the composite-formation is proposed based on heatabsorption by MWNTs and a partial melting of the silica-surface.

Direct synthesis of jet fuel range dicycloalkane by the aqueous phase hydrodeoxygenation of polycarbonate

2021 ◽  
Author(s):  
Lulin Wang ◽  
Guangyi Li ◽  
Cong Yu ◽  
Ai-Qin Wang ◽  
Xiaodong Wang ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Direct Synthesis ◽  
Jet Fuel ◽  
Catalyst Systems ◽  
First Time

For the first time, propane-2,2-diyldicyclohexane, a jet fuel range C15 dicycloalkane was directly produced by the aqueous-phase hydrodeoxygenation (APHDO) of polycarbonate (PC). Among the investigated catalyst systems, a mixture of...

scholarly journals Immobilization of an Iridium(I)-NHC-Phosphine Catalyst for Hydrogenation Reactions under Batch and Flow Conditions

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 656
Author(s):  
Henrietta Kovács ◽  
Krisztina Orosz ◽  
Gábor Papp ◽  
Ferenc Joó ◽  
Henrietta Horváth
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Heterogeneous Catalyst ◽  
Aqueous Phase ◽  
Levulinic Acid ◽  
Flow Reactor ◽  
High Catalytic Activity ◽  
Flow Conditions ◽  
Hydrogenation Reactions ◽  
Excellent Selectivity

Na2[Ir(cod)(emim)(mtppts)] (1) with high catalytic activity in various organic- and aqueous-phase hydrogenation reactions was immobilized on several types of commercially available ion-exchange supports. The resulting heterogeneous catalyst was investigated in batch reactions and in an H-Cube flow reactor in the hydrogenation of phenylacetylene, diphenylacetylene, 1-hexyne, and benzylideneacetone. Under proper conditions, the catalyst was highly selective in the hydrogenation of alkynes to alkenes, and demonstrated excellent selectivity in C=C over C=O hydrogenation; furthermore, it displayed remarkable stability. Activity of 1 in hydrogenation of levulinic acid to γ-valerolactone was also assessed.

scholarly journals Supramolecular structures of terbium(iii) porphyrin double-decker complexes on a single-walled carbon nanotube surface

RSC Advances ◽  
2019 ◽  
Vol 9 (48) ◽  
pp. 28135-28145
Author(s):  
Ahmed I. A. Abd El-Mageed ◽  
Takuji Ogawa
Keyword(s):  
Carbon Nanotubes ◽  
Scanning Probe Microscopy ◽  
Single Walled Carbon Nanotubes ◽  
Supramolecular Structures ◽  
Scanning Probe ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Double Decker ◽  
Walled Carbon Nanotubes ◽  
First Time

For the first time, using scanning probe microscopy, the supramolecular structures of terbium porphyrin double-decker complexes were observed on single-walled carbon nanotubes surfaces, where the molecules formed a well-ordered self-assembled array.

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