scholarly journals Highly thermally stable heterogeneous catalysts: study of 0D and 3D porphyrinic MOFs

CrystEngComm ◽  
2017 ◽  
Vol 19 (48) ◽  
pp. 7244-7252 ◽  
Author(s):  
E. Amayuelas ◽  
A. Fidalgo-Marijuán ◽  
B. Bazán ◽  
M. K. Urtiaga ◽  
G. Barandika ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysts ◽  
High Catalytic Activity ◽  
Thermally Stable ◽  
Alkene Oxidation

Porphyrin-based MOFs as heterogeneous catalysts show high catalytic activity, recyclability and selectivity towards alkene oxidation.

Robust high-connected rare-earth MOFs as efficient heterogeneous catalysts for CO2conversion

2017 ◽  
Vol 53 (22) ◽  
pp. 3224-3227 ◽  
Author(s):  
Na Wei ◽  
Rong-Xia Zuo ◽  
Yu-Yang Zhang ◽  
Zheng-Bo Han ◽  
Xue-Jun Gu
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Heterogeneous Catalysts ◽  
High Catalytic Activity ◽  
Thermally Stable ◽  
Mild Conditions

Two series of chemically and thermally stable rare-earth MOFs with a 12-connected hcp topology exhibit high catalytic activity towards the cycloaddition of CO2and epoxides under mild conditions.

Towards highly active heterogeneous catalysts via a sequential noncovalent bonding strategy

2021 ◽  
Author(s):  
Ruixue Wang ◽  
Ying Yue ◽  
Huiying Wei ◽  
Jinxin Guo ◽  
Yanzhao Yang
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysts ◽  
High Catalytic Activity ◽  
Synthetic Route ◽  
Surface Ligands ◽  
Highly Active ◽  
Noncovalent Bonding ◽  
Excellent Stability

Here, a novel synthetic route of ceria-based nanocatalysts with high catalytic activity and excellent stability was constructed by utilizing function groups from surface ligands. The surface of ceria nanorods were...

scholarly journals Biodiesel Production over Niobium-Containing Catalysts: A Review

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5506
Author(s):  
Daniel Carreira Batalha ◽  
Márcio José da Silva
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Heterogeneous Catalysts ◽  
Raw Materials ◽  
Catalytic Performance ◽  
High Specific Surface Area ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Main Reaction ◽  
High Catalytic Activity

Nowadays, the synthesis of biofuels from renewable raw materials is very popular. Among the various challenges involved in improving these processes, environmentally benign catalysts compatible with an inexpensive feedstock have become more important. Herein, we report the recent advances achieved in the development of Niobium-containing heterogeneous catalysts as well as their use in routes to produce biodiesel. The efficiency of different Niobium catalysts in esterification and transesterification reactions of lipids and oleaginous raw materials was evaluated, considering the effect of main reaction parameters such as temperature, time, catalyst load, and oil:alcohol molar ratio on the biodiesel yield. The catalytic performance of Niobium compounds was discussed considering the characterization data obtained by different techniques, including NH3-TPD, BET, and Pyr-FT-IR analysis. The high catalytic activity is attributed to its inherent properties, such as the active sites distribution over a high specific surface area, strength of acidity, nature, amount of acidic sites, and inherent mesoporosity. On top of this, recycling experiments have proven that most Niobium catalysts are stable and can be repeatedly used with consistent catalytic activity.

Thermally stable sandwich-type catalysts of Pt nanoparticles encapsulated in CeO2 nanorod/CeO2 nanoparticle core/shell supports for methane oxidation at high temperatures

RSC Advances ◽  
2016 ◽  
Vol 6 (46) ◽  
pp. 40323-40329 ◽  
Author(s):  
Zhiyun Zhang ◽  
Jing Li ◽  
Wei Gao ◽  
Zhaoming Xia ◽  
Yuanbin Qin ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Methane Oxidation ◽  
High Temperatures ◽  
Pt Nanoparticles ◽  
Core Shell ◽  
High Catalytic Activity ◽  
Thermally Stable ◽  
Sandwich Type ◽  
Nanoparticle Core

A sandwich-type Pt nanocatalyst encapsulated ceria-based core–shell catalyst (CNR@Pt@CNP) was designed and synthesized, which exhibited high catalytic activity and remarkably thermal-stability at high temperatures up to 700 °C.

Self-solidification ionic liquids as heterogeneous catalysts for biodiesel production

2019 ◽  
Vol 21 (11) ◽  
pp. 3182-3189 ◽  
Author(s):  
Xiaocheng Lin ◽  
Xiaomei Ling ◽  
Jinyi Chen ◽  
Meichen Li ◽  
Tongwen Xu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Heterogeneous Catalysts ◽  
Biodiesel Production ◽  
High Catalytic Activity ◽  
Excellent Stability

A simple and mild method has been developed to fabricate solid ionic liquids with high catalytic activity and excellent stability for efficient biodiesel production.

Synthesis of mesoporous iridium nanosponge: a highly active, thermally stable and efficient olefin hydrogenation catalyst

2017 ◽  
Vol 46 (34) ◽  
pp. 11431-11439 ◽  
Author(s):  
Sourav Ghosh ◽  
Balaji R. Jagirdar
Keyword(s):  
Catalytic Activity ◽  
Hydrogenation Catalyst ◽  
High Catalytic Activity ◽  
Capping Agent ◽  
Thermally Stable ◽  
Olefin Hydrogenation ◽  
Highly Active

Capping agent dissolution of Ir@BNHx nanocomposite affords mesoporous iridium nanosponge which exhibits high catalytic activity towards olefin hydrogenation of a variety of substrates.

scholarly journals Hybrid Catalysts for CO2 Conversion into Cyclic Carbonates

Catalysts ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 325 ◽  
Author(s):  
Carla Calabrese ◽  
Francesco Giacalone ◽  
Carmela Aprile
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Activity ◽  
Scientific Community ◽  
Heterogeneous Catalysts ◽  
Metal Organic Framework ◽  
High Catalytic Activity ◽  
Co2 Conversion ◽  
Cyclic Carbonates ◽  
Hybrid Catalysts ◽  
Metal Organic

The conversion of carbon dioxide into valuable chemicals such as cyclic carbonates is an appealing topic for the scientific community due to the possibility of valorizing waste into an inexpensive, available, nontoxic, and renewable carbon feedstock. In this regard, last-generation heterogeneous catalysts are of great interest owing to their high catalytic activity, robustness, and easy recovery and recycling. In the present review, recent advances on CO2 cycloaddition to epoxide mediated by hybrid catalysts through organometallic or organo-catalytic species supported onto silica-, nanocarbon-, and metal–organic framework (MOF)-based heterogeneous materials, are highlighted and discussed.

Thermally Stable Pt/CeO2Hetero-Nanocomposites with High Catalytic Activity

2010 ◽  
Vol 132 (14) ◽  
pp. 4998-4999 ◽  
Author(s):  
Huan-Ping Zhou ◽  
Hao-Shuai Wu ◽  
Jie Shen ◽  
An-Xiang Yin ◽  
Ling-Dong Sun ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Catalytic Activity ◽  
Thermally Stable

Effects of Diameters on the Catalytic Activity of Spherical V-MCM-41 in the Selective Oxidation of Styrene

2012 ◽  
Vol 549 ◽  
pp. 137-140
Author(s):  
Yu Chen ◽  
Hua Qin ◽  
Xiao Bo Shi ◽  
Yan Kong
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Method ◽  
Selective Oxidation ◽  
Heterogeneous Catalysts ◽  
Molar Ratio ◽  
High Catalytic Activity ◽  
Precise Control ◽  
Mcm 41

Spherical V-MCM-41s with different diameter are synthesized by direct hydrothermal method through the precise control over the molar ratio of NaOH/TEOS. Vanadium supported on spherical MCM-41s is also prepared by impregnation methods. They are used as heterogeneous catalysts for the oxidation of styrene with H2O2 as oxidant. The results suggest that all catalysts have high catalytic activity, which increases with their diameter decreasing.

Porous organic cage stabilised palladium nanoparticles: efficient heterogeneous catalysts for carbonylation reaction of aryl halides

2018 ◽  
Vol 54 (22) ◽  
pp. 2796-2799 ◽  
Author(s):  
Yong Zhang ◽  
Yu Xiong ◽  
Jin Ge ◽  
Rui Lin ◽  
Chen Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
Heterogeneous Catalysts ◽  
Aryl Halides ◽  
High Catalytic Activity ◽  
Mild Conditions ◽  
Carbonylation Reaction

Porous organic cage stabilised palladium nanoparticles were prepared using methanol as a mild reductant and displayed high catalytic activity for the carbonylation reaction of aryl halides under mild conditions.

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