scholarly journals Highly-Dispersed Ni-NiO Nanoparticles Anchored on an SiO2 Support for an Enhanced CO Methanation Performance

Catalysts ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 506 ◽  
Author(s):  
Jiangwei Li ◽  
Panpan Li ◽  
Jiangbing Li ◽  
Zhiqun Tian ◽  
Feng Yu
Keyword(s):  
Heterogeneous Catalysts ◽  
Pore Diameter ◽  
Large Specific Surface Area ◽  
Nio Nanoparticles ◽  
One Pot ◽  
Co Methanation ◽  
Ni Content ◽  
Co Conversion ◽  
Highly Dispersed ◽  
Sio2 Support

Highly-dispersed Ni-NiO nanoparticles was successfully anchored on an SiO2 support via a one-pot synthesis and used as heterogeneous catalysts for CO methanation. The as-obtained Ni-NiO/SiO2 catalyst possessed a high Ni content of 87.8 wt.% and exhibited a large specific surface area of 71 m2g−1 with a main pore diameter of 16.7 nm. Compared with an H2-reduced Ni-NiO/SiO2 (i.e., Ni/SiO2) catalyst, the Ni-NiO/SiO2 displayed a superior CO methanation performance. At the temperature of 350 °C, the Ni-NiO/SiO2 showed a CO conversion of 97.1% and CH4 selectivity of 81.9%, which are much better values than those of Ni/SiO2. After a 50-h stability test, the Ni-NiO/SiO2 catalyst still had an overwhelming stability retention of 97.2%, which was superior to the 72.8% value of the Ni/SiO2 catalyst.

scholarly journals Facile Synthesis of COF-Supported Reduced Pd-Based Catalyst for One-Pot Reductive Amination of Aldehydes

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 287
Author(s):  
Jianguo Liu ◽  
Mingyue Zhang ◽  
Longlong Ma
Keyword(s):  
Heterogeneous Catalysts ◽  
Reductive Amination ◽  
Secondary Amines ◽  
Metallic State ◽  
One Pot ◽  
Effective Synthesis ◽  
Pharmaceutical Industries ◽  
The One ◽  
Heterocyclic Aldehydes ◽  
Supported Pd

Dibenzylamine motifs are an important class of crucial organic compounds and are widely used in fine chemical and pharmaceutical industries. The development of the efficient, economical, and environmentally friendly synthesis of amines using transition metal-based heterogeneous catalysts remains both desirable and challenging. Herein, we prepared the covalent organic framework (COF)-supported heterogeneous reduced COF-supported Pd-based catalyst and used it for the one-pot reductive amination of aldehydes. There are both Pd metallic state and oxidated Pdσ+ in the catalysts. Furthermore, in the presence of the reduced COF-supported Pd-based catalyst, many aromatic, aliphatic, and heterocyclic aldehydes with various functional groups substituted were converted to their corresponding amines products in good to excellent selectivity (up to 91%) under mild reaction conditions (70 °C, 2 h, NH3, 20 bar H2). This work expands the covalent organic frameworks for the material family and its support catalyst, opening up new catalytic applications in the economical, practical, and effective synthesis of secondary amines.

One-pot synthesis of naturanol from α-pinene oxide on bifunctional Pt-Sn/SiO2 heterogeneous catalysts

2007 ◽  
Vol 325 (1) ◽  
pp. 15-24 ◽  
Author(s):  
G. Neri ◽  
G. Rizzo ◽  
A.S. Arico’ ◽  
C. Crisafulli ◽  
L. De Luca ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
One Pot ◽  
One Pot Synthesis

scholarly journals NiO nanoparticles: A highly efficient catalyst for the one-pot three-component synthesis of pyrano [2, 3-d] pyrimidine derivatives in green media.

2021 ◽  
Vol 18 ◽  
Author(s):  
Ellahe Sabbaghnasab ◽  
Enayatollah Sheikhhosseini
Keyword(s):  
Barbituric Acid ◽  
Nio Nanoparticles ◽  
Pyrimidine Derivatives ◽  
One Pot ◽  
Efficient Catalyst ◽  
Environmental Friendliness ◽  
Short Reaction Time ◽  
Pyrimidine Synthesis ◽  
Simple Processing ◽  
The One

: NiO nanoparticles are utilized to effectively strengthen annulated pyrano [2, 3- d] pyrimidine synthesis through primary Knoevenagel, following Micheal and ultimate heterocyclization reactions of aldehyde, malononitrile, and barbituric acid. The characteristics of NiO nanoparticles are identified using advanced techniques, such as IR, UV, EDX, XRD, SEM, and TEM. The nano-NiO particles are mostly below < 100 nm in size with uniform spherical shapes. The adopted approach is advantages thanks to its simple processing, relatively short reaction time, often good to high average yields, convenient workability, and environmental friendliness.

Alginate–copper microspheres as efficient and reusable heterogeneous catalysts for the one-pot synthesis of 4-organylselanyl-1H-pyrazoles

2020 ◽  
Vol 10 (12) ◽  
pp. 3918-3930 ◽  
Author(s):  
Jaqueline F. Souza ◽  
Thalita F. B. de Aquino ◽  
José E. R. Nascimento ◽  
Raquel G. Jacob ◽  
André R. Fajardo
Keyword(s):  
Heterogeneous Catalysts ◽  
One Pot ◽  
New Class ◽  
One Pot Synthesis ◽  
Facile Preparation ◽  
The One ◽  
Substituted Pyrazoles

This study demonstrates the facile preparation and use of alginate–Cu2+ microspheres in the catalysis of a new class of organoselenium substituted pyrazoles through one-pot reactions.

Low-temperature catalytic oxidation of aniline to azoxybenzene over an Ag/Fe2O3 nanoparticle catalyst using H2O2 as an oxidant

2019 ◽  
Vol 43 (23) ◽  
pp. 8911-8918 ◽  
Author(s):  
Bappi Paul ◽  
Sachin K. Sharma ◽  
Shubhadeep Adak ◽  
Rubina Khatun ◽  
Gurmeet Singh ◽  
...  
Keyword(s):  
Low Temperature ◽  
Catalytic Oxidation ◽  
One Pot ◽  
Efficient Catalyst ◽  
Highly Dispersed ◽  
Fe2o3 Nanoparticle ◽  
Nanoparticle Catalyst

Highly dispersed Ag-supported α-Fe2O3 is found to be a recyclable and efficient catalyst for one-pot conversion of aniline to azoxybenzene.

Rational design of a mesoporous silica-based cathode for efficient trapping of polysulfides in Li–S batteries

2020 ◽  
Vol 56 (5) ◽  
pp. 786-789 ◽  
Author(s):  
Chao Chen ◽  
Huifang Xu ◽  
Bingkai Zhang ◽  
Qingbin Jiang ◽  
Yaping Zhang ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Rational Design ◽  
Conductive Polymer ◽  
Nio Nanoparticles ◽  
Highly Dispersed

We develop a mesoporous silica-based cathode for efficient trapping of lithium polysulfides. This cathode consists of a mesoporous silica (HMS), highly dispersed NiO nanoparticles embedded in the silica structure and a conductive polymer prepared by in situ polymerization.

scholarly journals Highly dispersed Ni nanoparticles on 3D-mesoporous KIT-6 for CO methanation: Effect of promoter species on catalytic performance

2017 ◽  
Vol 38 (7) ◽  
pp. 1127-1137 ◽  
Author(s):  
Hong-Xia Cao ◽  
Jun Zhang ◽  
Cheng-Long Guo ◽  
Jingguang G. Chen ◽  
Xiang-Kun Ren
Keyword(s):  
Catalytic Performance ◽  
Ni Nanoparticles ◽  
Co Methanation ◽  
Highly Dispersed
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