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.

A copper nitride catalyst for the efficient hydroxylation of aryl halides under ligand-free conditions

2021 ◽  
Author(s):  
Hang Xu ◽  
Sho Yamaguchi ◽  
Takato Mitsudome ◽  
Tomoo Mizugaki
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalyst ◽  
Aryl Halides ◽  
High Catalytic Activity ◽  
Copper Nitride ◽  
Ligand Free

Copper nitride (Cu3N) was used as a heterogeneous catalyst for the hydroxylation of aryl halides under ligand-free conditions. The cubic Cu3N nanoparticles showed high catalytic activity, comparable to those of...

Insights into the catalytic activity of Ru/NaY catalysts for efficient H2 production through aqueous phase reforming

2020 ◽  
Vol 4 (2) ◽  
pp. 678-690 ◽  
Author(s):  
Pranjal Gogoi ◽  
Atul S. Nagpure ◽  
Prabu Kandasamy ◽  
C. V. V. Satyanarayana ◽  
Thirumalaiswamy Raja
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Aqueous Phase ◽  
H2 Production ◽  
Zeolite Catalysts ◽  
Nay Zeolite ◽  
Ruthenium Nanoparticles ◽  
Exchange Method ◽  
Aqueous Phase Reforming ◽  
Ion Exchange Method

Ruthenium nanoparticles supported on NaY zeolite catalysts were synthesized by a simple ion exchange method.

Nanoporous gold film: fabrication and role as a catalytic reactor

2015 ◽  
Vol 44 (26) ◽  
pp. 11929-11934 ◽  
Author(s):  
Youyi Xia ◽  
Xiang Deng ◽  
Shuxin Yan ◽  
Chang Gao ◽  
Cong Ma ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Gold Film ◽  
Nanoporous Gold ◽  
High Catalytic Activity ◽  
Catalytic Reactor ◽  
Hydrogenation Reactions ◽  
Film Fabrication ◽  
Seed Mediated

A thin NPG film with a thickness of 90 nm can be prepared on various substrates to form a catalytic reactor conveniently by using seed-mediated growth. Because of the nanoporous characterization, the film exhibits high catalytic activity both for oxidative and hydrogenation reactions.

Towards rational design of core–shell catalytic nanoreactor with high performance catalytic hydrogenation of levulinic acid

2016 ◽  
Vol 6 (13) ◽  
pp. 5102-5115 ◽  
Author(s):  
Biplab Banerjee ◽  
Ramana Singuru ◽  
Sudipta K. Kundu ◽  
Karnekanti Dhanalaxmi ◽  
Linyi Bai ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Hydrogenation ◽  
Levulinic Acid ◽  
High Performance ◽  
Rational Design ◽  
Core Shell ◽  
High Catalytic Activity

Core–shell catalytic nanoreactor was designed, exhibiting high catalytic activity for levulinic acid hydrogenation.

SO3H-functionalized metal organic frameworks: an efficient heterogeneous catalyst for the synthesis of quinoxaline and derivatives

RSC Advances ◽  
2016 ◽  
Vol 6 (41) ◽  
pp. 35135-35143 ◽  
Author(s):  
Radoelizo S. Andriamitantsoa ◽  
Jingjing Wang ◽  
Wenjun Dong ◽  
Hongyi Gao ◽  
Ge Wang
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalyst ◽  
Metal Organic Frameworks ◽  
Good Stability ◽  
High Catalytic Activity ◽  
General Applicability ◽  
Metal Organic ◽  
Efficient Heterogeneous Catalyst

The high dispersed –SO3H groups in the framework of MIL-101-Cr–NH–RSO3H ensure high catalytic activity for the condensation of 1,2-diamines with benzil. The catalyst exhibits good stability, general applicability and excellent recycling performance.

A facile synthesis of Pt@Ir zigzag bimetallic nanocomplexes for hydrogenation reactions

2015 ◽  
Vol 51 (44) ◽  
pp. 9216-9219 ◽  
Author(s):  
Jiaqing Wang ◽  
Danhua Ge ◽  
Xueqin Cao ◽  
Minghua Tang ◽  
Yue Pan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Catalytic Activity ◽  
Facile Synthesis ◽  
Hydrogenation Reactions

A facile approach for the synthesis of Pt@Ir zigzag bimetallic nanocomplexes with high catalytic activity.

scholarly journals Palladium nanoparticles supported on nitrogen doped porous carbon material derived from cyclodextrin, glucose and melamine based polymer: promising catalysts for hydrogenation reactions

2020 ◽  
Vol 92 (6) ◽  
pp. 827-837 ◽  
Author(s):  
Samahe Sadjadi ◽  
Masoumeh Malmir ◽  
Bastien Léger ◽  
Eric Monflier ◽  
Majid M. Heravi
Keyword(s):  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
Aqueous Media ◽  
Hydrogenation Reaction ◽  
Molar Ratio ◽  
Porous Carbon Material ◽  
High Catalytic Activity ◽  
Hydrothermal Conditions ◽  
Nitrogen Doped ◽  
Hydrogenation Reactions

AbstractMelamine based polymer (MT) was prepared and then reacted with a mixture of glucose (Glu) and β-cyclodextrin (CD) under hydrothermal conditions to afford, MT/Glu-CD. Then, the adsorption of Pd salt was realized on MT/Glu-CD. The resulting compound was subsequently carbonized to furnish Pd/MT/C that exhibited high catalytic activity for the hydrogenation of nitroarenes in aqueous media. To elucidate the roles of CD, Glu, the molar ratio of Glu:CD and the carbonization in the catalytic activity, several control catalysts have been prepared and their performances for a model hydrogenation reaction were compared with that of Pd/MT/C. The results confirmed the importance of the carbonization as well as the presence of CD for achieving high catalytic activity. Moreover, it was found that the molar ratio of Glu:CD could affect the catalytic activity of the final catalyst and the optimum molar ratio of Glu:CD was 30:70. The recycling test as well as measurement of Pd leaching demonstrated high recyclability and low Pd leaching of Pd/MT/C.

scholarly journals Improving the hydrothermal stability of zeolite Y by La3+ cation exchange as a catalyst for the aqueous-phase hydrogenation of levulinic acid

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5568-5579
Author(s):  
Hue-Tong Vu ◽  
Michael Goepel ◽  
Roger Gläser
Keyword(s):  
Catalytic Activity ◽  
Formic Acid ◽  
Cation Exchange ◽  
Aqueous Phase ◽  
Levulinic Acid ◽  
Zeolite Y ◽  
Hydrothermal Stability

La3+ cation exchange is shown to improve the hydrothermal stability and catalytic activity of bifunctional zeolite Pt/Y catalysts in the aqueous-phase hydrogenation of levulinic acid (LA) with formic acid (FA) as hydrogen source.

scholarly journals A base-free Chan–Lam reaction catalyzed by an easily assembled Cu(II)-carboxylate metal-organic framework

2021 ◽  
pp. 174751982110265
Author(s):  
Xinhai Zhang ◽  
Jianhua Qin ◽  
Ruixuan Ma ◽  
Lei Shi
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalyst ◽  
Metal Organic Framework ◽  
Coupling Reaction ◽  
High Catalytic Activity ◽  
Arylboronic Acids ◽  
Metal Organic ◽  
Organic Framework

A new copper(II) metal-organic framework is constructed as a sustainable copper heterogeneous catalyst. Cu-DPTCA, with high catalytic activity, can effectively promote the Chan–Lam coupling reaction of arylboronic acids and amines without adding any base or additive.

A highly stable polyoxovanadate-based Cu(i)–MOF for the carboxylative cyclization of CO2 with propargylic alcohols at room temperature

2020 ◽  
Vol 22 (21) ◽  
pp. 7513-7520
Author(s):  
Hong-Rui Tian ◽  
Zhong Zhang ◽  
Shu-Mei Liu ◽  
Tian-Yi Dang ◽  
Zhuo Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalyst ◽  
Room Temperature ◽  
Value Added ◽  
High Catalytic Activity ◽  
Cyclic Carbonates ◽  
Propargylic Alcohols

A POVs-based Cu(i)–MOF was synthesized and utilized as a heterogeneous catalyst for the cyclization of CO2 with propargylic alcohols to obtain value-added α-alkylidene cyclic carbonates, exhibiting high catalytic activity and sustainability.

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