A Highly Dispersed Copper Nanoparticles Catalyst with a Large Number of Weak Acid Centers for Efficiently Synthesizing the High Value-Added 3-Methylindole by Aniline and Biomass-Derived Glycerin

2020 ◽  
Author(s):  
Pinghui Sun ◽  
Shuyi Lin ◽  
Huimei Guo ◽  
Jianhui Su ◽  
Lei Shi
Keyword(s):  
Copper Nanoparticles ◽  
Value Added ◽  
Weak Acid ◽  
Highly Dispersed ◽  
Acid Centers

Selective C–C coupling of terminal alkynes under an air atmosphere without base over Cu–NX–C catalysts

2020 ◽  
Vol 44 (48) ◽  
pp. 20993-20998
Author(s):  
Xinxin Xiao ◽  
Yin Xu ◽  
Sangepu Bhavanarushi ◽  
Bin Liu ◽  
Xiaomeng Lv
Keyword(s):  
Catalytic Activity ◽  
Copper Nanoparticles ◽  
Oxidative Coupling ◽  
Terminal Alkynes ◽  
Air Atmosphere ◽  
Highly Dispersed ◽  
Nitrogenated Carbon

Highly dispersed copper nanoparticles supported on mesoporous nitrogenated carbon were synthesized and exhibited superior catalytic activity towards aerobic oxidative coupling of terminal alkynes.

A novel supported Cu catalyst with highly dispersed copper nanoparticles and its remarkable catalytic performance in methanol decomposition

RSC Advances ◽  
2014 ◽  
Vol 4 (94) ◽  
pp. 52008-52011 ◽  
Author(s):  
Shaojun Qing ◽  
Xiaoning Hou ◽  
Yajie Liu ◽  
Hongjuan Xi ◽  
Xiang Wang ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Catalytic Performance ◽  
Methanol Decomposition ◽  
Impregnation Method ◽  
Highly Dispersed ◽  
Cu Catalyst

Modification of SiO2 by starch makes it possible to prepare an efficient Cu/SiO2 catalyst for methanol decomposition by the simple impregnation method.

An efficient route to prepare highly dispersed metallic copper nanoparticles on ordered mesoporous silica with outstanding activity for hydrogenation reactions

2015 ◽  
Vol 5 (7) ◽  
pp. 3735-3745 ◽  
Author(s):  
Constantin Rudolf ◽  
Fatima Abi-Ghaida ◽  
Brindusa Dragoi ◽  
Adrian Ungureanu ◽  
Ahmad Mehdi ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Copper Nanoparticles ◽  
Metallic Copper ◽  
Ordered Mesoporous Silica ◽  
Ordered Mesoporous ◽  
Highly Dispersed ◽  
Hydrogenation Reactions ◽  
Efficient Route

Highly dispersed copper nanoparticles synthesized on polyether-functionalized ordered mesoporous silica show outstanding activity for hydrogenation of cinnamaldehyde.

scholarly journals TiO2-supported copper nanoparticles prepared via ion exchange for photocatalytic hydrogen production

2014 ◽  
Vol 2 (18) ◽  
pp. 6432-6438 ◽  
Author(s):  
Hao Tian ◽  
Xiao Li Zhang ◽  
Jason Scott ◽  
Charlene Ng ◽  
Rose Amal
Keyword(s):  
Hydrogen Production ◽  
Ion Exchange ◽  
Copper Nanoparticles ◽  
Hydrogen Generation ◽  
Metallic Copper ◽  
Wet Impregnation ◽  
Highly Dispersed ◽  
Generation Capacity ◽  
The Difference ◽  
Reaction Cycles

Cu/TiO2 synthesized through ion exchange provides finer, more highly dispersed metallic copper deposits, displaying a ∼44% greater hydrogen generation capacity than WI Cu/TiO2 prepared using wet impregnation. The difference in activity was maintained over repeated reaction cycles.

Copper nanoparticles decorated polyaniline–zeolite nanocomposite for the nanomolar simultaneous detection of hydrazine and phenylhydrazine

2016 ◽  
Vol 6 (4) ◽  
pp. 1134-1145 ◽  
Author(s):  
Balwinder Kaur ◽  
Rajendra Srivastava ◽  
Biswarup Satpati
Keyword(s):  
Surface Area ◽  
Copper Nanoparticles ◽  
Electrocatalytic Activity ◽  
High Surface ◽  
High Surface Area ◽  
Simultaneous Detection ◽  
Pani Film ◽  
Highly Dispersed

The high electrocatalytic activity of the CuNPs–PANI–Nano-ZSM-5 nanocomposite can be attributed to the synergistic contribution provided by the highly dispersed copper nanoparticles and conductive PANI film on high surface area Nano-ZSM-5.

scholarly journals Hydrodeoxygenation of Residual Fatty Acids Fraction over Ni-Mo / Al2O3 Catalyst

2001 ◽  
Vol 71 (3) ◽  
pp. 377-386
Author(s):  
Dan Ion ◽  
Mihaela Bombos ◽  
Adrian Radu ◽  
Dorin Bombos ◽  
Paul Rosca
Keyword(s):  
Fatty Acids ◽  
Continuous System ◽  
Weak Acid ◽  
Residual Fraction ◽  
Total Acidity ◽  
Reaction Products ◽  
Medium Strength ◽  
Acid Centers ◽  
Al2o3 Catalyst

The hydrodeoxygenation of the residual fraction of fatty acids from sunflower oilwas performed on bimetallic Ni-Mo/-Al2O3. Experiments were carried out on a in a continuous system at temperatures below 340 �C and pressures less than 70 bar. The catalyst shows a total acidity of 1.192 meq / g, from which 0.714 meq / g represents the concentration of weak acid centers, 0.438 meq / g represents the concentration of medium strength acid centers, while the concentration of strong centers is very small, only 0.041 meq / g. The analysis of the reaction products mainly highlighted the presence of linear hydrocarbons.

Solvent-free ketalization of polyols over germanosilicate zeolites: the role of the nature and strength of acid sites

2020 ◽  
Vol 10 (24) ◽  
pp. 8254-8264
Author(s):  
Iunia Podolean ◽  
Jin Zhang ◽  
Mariya Shamzhy ◽  
Vasile I. Pârvulescu ◽  
Jiří Čejka
Keyword(s):  
Active Sites ◽  
Acid Sites ◽  
Weak Acid ◽  
Solvent Free ◽  
Acid Centers

Weak acid centers of germanosilicate zeolites can serve as active sites in ketalization reactions.

Highly Dispersed Copper Nanoparticles Supported on Activated Carbon as an Efficient Catalyst for Selective Reduction of Vanillin

Small ◽  
2018 ◽  
Vol 14 (36) ◽  
pp. 1801953 ◽  
Author(s):  
Ruoyu Fan ◽  
Chun Chen ◽  
Miaomiao Han ◽  
Wanbing Gong ◽  
Haimin Zhang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Copper Nanoparticles ◽  
Selective Reduction ◽  
Efficient Catalyst ◽  
Highly Dispersed
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