NiCoFe spinel-type oxide nanosheet arrays derived from layered double hydroxides as structured catalysts

RSC Advances ◽  
2014 ◽  
Vol 4 (101) ◽  
pp. 57804-57809 ◽  
Author(s):  
Ge Meng ◽  
Qiu Yang ◽  
Yixi Wang ◽  
Xiaoming Sun ◽  
Junfeng Liu
Keyword(s):  
Catalytic Activity ◽  
Layered Double Hydroxides ◽  
Spinel Type ◽  
Structured Catalysts ◽  
Structured Catalyst ◽  
Nanosheet Arrays ◽  
Double Hydroxides

NiCoFe spinel-type oxide nanosheet arrays derived from layered double hydroxides (LDH) were used as structured catalyst, which exhibited excellent catalytic activity towards the oxidation of styrene.

scholarly journals Formation of a Pd/MgO Structured Catalyst for the Aqueous Oxidation of Silane to Silanol

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 834 ◽  
Author(s):  
Zhou ◽  
Cao ◽  
Wang ◽  
Li
Keyword(s):  
Catalytic Activity ◽  
Pd Nanoparticles ◽  
Structured Catalysts ◽  
Long Term Stability ◽  
Plasma Electrolyte ◽  
Structured Catalyst ◽  
Aqueous Oxidation ◽  
Plasma Electrolyte Oxidation ◽  
Fabrication Parameters

The catalytic oxidation of silanes to produce silanols using water as an oxidant at mild temperatures is a major challenge in Si-H activation. Highly efficient and easy-to-recycle catalysts based on Pd nanoparticles are in high demand. In this study, Pd nanoparticles embedded in an MgO porous overlayer on an Mg plate as a structured catalyst was prepared by the plasma electrolyte oxidation (PEO) technique. The Pd/MgO catalyst is strongly anchored to the MgO plate, building a structured catalyst. Fabrication parameters such as the temperature of the electrolyte and applied voltage significantly influenced the structure of the obtained Pd/MgO catalyst and in turn its catalytic activity. The catalytic activities of Pd/MgO were evaluated by activation of a Si-H bond for catalyzing the aqueous oxidation of silanes to silanol at mild temperatures. The catalytic activity of Pd nanoparticles is favored by their electro-deficient state due to influence from the MgO substrate. The Pd/MgO catalyst exhibits good performance stability during recycling. This work paves the way for fabricating structured catalysts with long-term stability and enhanced metal–oxide interaction.

scholarly journals Catalytic Combustion of Low Concentration Methane over Catalysts Prepared from Co/Mg-Mn Layered Double Hydroxides

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Hongfeng Liu ◽  
Xingrui Fu ◽  
Xiaole Weng ◽  
Yue Liu ◽  
Haiqiang Wang ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Catalytic Activity ◽  
Layered Double Hydroxides ◽  
Catalytic Combustion ◽  
Mixed Oxides ◽  
Oxygen Mobility ◽  
Catalytic Combustion Of Methane ◽  
Redox Ability ◽  
Double Hydroxides ◽  
Mn Oxides

A series of Co/Mg-Mn mixed oxides were synthesized through thermal decomposition of layered double hydroxides (LDHs) precursors. The resulted catalysts were then subjected for catalytic combustion of methane. Experimental results revealed that the Co4.5Mg1.5Mn2LDO catalyst possessed the best performance with theT90=485°C. After being analyzed via XRD, BET-BJH, SEM, H2-TPR, and XPS techniques, it was observed that the addition of cobalt had significantly improved the redox ability of the catalysts whilst certain amount of magnesium was essential to guarantee the catalytic activity. The presence of Mg was helpful to enhance the oxygen mobility and, meanwhile, improved the dispersion of Co and Mn oxides, preventing the surface area loss after calcination.

ChemInform Abstract: Catalytic Activity of Layered Double Hydroxides or Hydrotalcite-Type Anionic Clays

ChemInform ◽  
2013 ◽  
Vol 44 (12) ◽  
pp. no-no ◽  
Author(s):  
Angelo Vaccari ◽  
Francesco Basile ◽  
Giuseppe Fornasari
Keyword(s):  
Catalytic Activity ◽  
Layered Double Hydroxides ◽  
Anionic Clays ◽  
Double Hydroxides

Immobilization of anionic iron(III) porphyrins into ordered macroporous layered double hydroxides and investigation of catalytic activity in oxidation reactions

2009 ◽  
Vol 310 (1-2) ◽  
pp. 42-50 ◽  
Author(s):  
Matilte Halma ◽  
Kelly Aparecida Dias de Freitas Castro ◽  
Vanessa Prévot ◽  
Claude Forano ◽  
Fernando Wypych ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Layered Double Hydroxides ◽  
Oxidation Reactions ◽  
Ordered Macroporous ◽  
Double Hydroxides

Efficient thermal- and photocatalysts made of Au nanoparticles on MgAl-layered double hydroxides for energy and environmental applications

2019 ◽  
Vol 21 (39) ◽  
pp. 21798-21805 ◽  
Author(s):  
Hao Zhou ◽  
Yanhui Zhang
Keyword(s):  
Catalytic Activity ◽  
Layered Double Hydroxides ◽  
Au Nanoparticles ◽  
Environmental Applications ◽  
Double Hydroxides

We compared the effect of the surfactant PVP on the catalyst and found that Au/MgAl-LDHs had better catalytic activity than (PVP@Au)/MgAl-LDHs.

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