Formation and catalytic performance of supported ni nanoparticles via self-reduction of hybrid NiAl-LDH/C composites

AIChE Journal ◽  
2010 ◽  
Vol 56 (11) ◽  
pp. 2934-2945 ◽  
Author(s):  
Xu Xiang ◽  
Lu Bai ◽  
Feng Li
Keyword(s):  
Catalytic Performance ◽  
Ni Nanoparticles ◽  
Supported Ni

scholarly journals The Role of Active Sites Location in Partial Oxidation of Methane to Syngas for MCM-41 Supported Ni Nanoparticles

Catalysts ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 606 ◽  
Author(s):  
Chuanmin Ding ◽  
Junwen Wang ◽  
Yufeng Li ◽  
Qian Ma ◽  
Lichao Ma ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Active Sites ◽  
Catalytic Performance ◽  
Partial Oxidation Of Methane ◽  
Pore Channel ◽  
Impregnation Method ◽  
Ni Nanoparticles ◽  
Oxidation Of Methane ◽  
Supported Ni ◽  
Mcm 41

The supporting modes of active metal over mesoporous materials play an important role in catalytic performance. The location of Ni nanoparticles inside or outside the mesoporous channel of MCM-41 has a significant influence on the reactivity in partial oxidation of methane to syngas reaction. The characterization data using different techniques (Transmission Electron Microscope (TEM), X-Ray Diffraction (XRD), N2 adsorption-desorption, H2 Temperature-Programmed Reduction (H2-TPR), and Inductively Coupled Plasma (ICP)) indicated that nickel was located outside the mesoporous channels for the impregnation method (Ni/MCM-41), while nickel was encapsulated within MCM-41 via the one-step hydrothermal crystallization method (Ni-MCM-41). The nickel atoms were mainly dispersed predominantly inside the skeleton of zeolite. When the load amount of Ni increased, both of Ni species inside the skeleton or pore channel of zeolite increased, and the ordered structure of MCM-41 was destroyed gradually. Contributed by the strong interaction with MCM-41, the Ni particles of Ni-MCM-41 were highly dispersed with smaller particle size compared with supported Ni/MCM-41 catalyst. The Ni-MCM-41 displayed higher catalytic performance than Ni/MCM-41, especially 10% Ni-MCM-41 due to high dispersity of Ni. The confinement effect of MCM-41 zeolite also afforded high resistance of sintering and coking for 10% Ni-MCM-41 catalyst. Especially, 10% Ni-MCM-41 catalyst showed outstanding catalytic stability.

Chelating agent effects in the synthesis of supported Ni nanoparticles as catalysts for hydrogen production

2021 ◽  
pp. 118219
Author(s):  
Alejandra C. Villagran˗Olivares ◽  
Mariana N. Barroso ◽  
Carlos A. López ◽  
Jordi Llorca ◽  
María C. Abello
Keyword(s):  
Hydrogen Production ◽  
Chelating Agent ◽  
Ni Nanoparticles ◽  
Supported Ni

scholarly journals Surface Oxidation of Supported Ni Particles and Its Impact on the Catalytic Performance during Dynamically Operated Methanation of CO2

Catalysts ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 279 ◽  
Author(s):  
Benjamin Mutz ◽  
Andreas Gänzler ◽  
Maarten Nachtegaal ◽  
Oliver Müller ◽  
Ronald Frahm ◽  
...  
Keyword(s):  
Surface Oxidation ◽  
Catalytic Performance ◽  
Supported Ni

The Effect of Ni Precursor Salts on Diatomite Supported Ni-Mg Catalysts in Methanation of CO2

2021 ◽  
Vol 1016 ◽  
pp. 1417-1422
Author(s):  
Chao Sun ◽  
Jugoslav Krstic ◽  
Vojkan Radonjic ◽  
Miroslav Stankovic ◽  
Patrick da Costa
Keyword(s):  
Catalytic Activity ◽  
Atmospheric Pressure ◽  
Textural Properties ◽  
Catalytic Performance ◽  
Nickel Salt ◽  
Nitrate Salt ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
The Difference ◽  
Supported Ni

This study is aimed to investigate the effect of Ni precursor salts on the properties (textural, phase-structural, reducibility, and basicity), and catalytic performance of diatomite supported Ni-Mg catalyst in methanation of CO2. The NiMg/D-X catalysts derived from various nickel salts (X = S-sulfamate, N-nitrate or A-acetate) were synthesized by the precipitation-deposition (PD) method. The catalysts were characterized by N2-physisorption, XRD, TPR-H2, and TPD-CO2 techniques. The different catalytic activity (conversion) and selectivity, observed in CO2 methanation carried out under relatively mild conditions (atmospheric pressure; temperatures: 250-450 °C) are related and explained by the difference in textural properties, metallic Ni-crystallite size, reducibility, and basicity of studied catalysts. The results showed that catalyst derived from Ni-nitrate salt (NiMg/D-N) is more suitable for the preparation of efficient catalyst for CO2 methanation than its counterparts derived from sulfamate (NiMg/D-S) or acetate (NiMg/D-A) nickel salt. The NiMg/D-N catalyst showed the highest specific surface area and total basicity, and the best catalytic performance with CO2 conversion of 63.3 % and CH4 selectivity of 80.9 % at 450 °C.

Supported Ni nanoparticles with a phosphine ligand as an efficient heterogeneous non-noble metal catalytic system for regioselective hydrosilylation of alkynes

2020 ◽  
Vol 18 (38) ◽  
pp. 7554-7558
Author(s):  
Hongli Wang ◽  
Yongji Huang ◽  
Xinzhi Wang ◽  
Xinjiang Cui ◽  
Feng Shi
Keyword(s):  
Noble Metal ◽  
Catalytic System ◽  
Phosphine Ligand ◽  
Ni Nanoparticles ◽  
Supported Ni

A convenient and effective heterogeneous non-noble metal catalytic system for regioselective hydrosilylation of alkynes was successfully developed by the combination of Ni/Al2O3 with a xantphos ligand.

Preparation of biomass-derived porous carbon supported Ni nanoparticles for CO2 reforming of CH4

2020 ◽  
Vol 44 (29) ◽  
pp. 12503-12513
Author(s):  
Penggang Lv ◽  
Dawei Liu ◽  
Bin Tian ◽  
Xiaoxun Ma ◽  
Maohong Fan ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Schematic Diagram ◽  
Ni Nanoparticles ◽  
Co2 Reforming ◽  
Co2 Reforming Of Ch4 ◽  
Supported Ni

A schematic diagram for the reaction of CH4 and CO2 over a Ni/bio-char catalyst.

Self-supported Ni nanoparticles embedded on nitrogen-doped carbon derived from nickel polyphthalocyanine for high-performance non-enzymatic glucose detection

2018 ◽  
Vol 6 (42) ◽  
pp. 6781-6787 ◽  
Author(s):  
Wenbin Gao ◽  
Qin Li ◽  
Meiling Dou ◽  
Zhengping Zhang ◽  
Feng Wang
Keyword(s):  
High Performance ◽  
High Sensitivity ◽  
Glucose Detection ◽  
Ni Nanoparticles ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
Supported Ni

Ni nanoparticles self-supported on N-doped carbon derived from nickel-polyphthalocyanine exhibit a high sensitivity and long-term reusability for glucose detection.

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