Basic Properties of Mg2+1-xAl3+x Layered Double Hydroxides Intercalated by Carbonate, Hydroxide, Chloride, and Sulfate Anions

1995 ◽  
Vol 34 (4) ◽  
pp. 883-892 ◽  
Author(s):  
Vera R. L. Constantino ◽  
Thomas J. Pinnavaia
Keyword(s):  
Layered Double Hydroxides ◽  
Basic Properties ◽  
Carbonate Hydroxide ◽  
Double Hydroxides

Construction of orderly hierarchical FeOOH/NiFe layered double hydroxides supported on cobaltous carbonate hydroxide nanowire arrays for a highly efficient oxygen evolution reaction

2018 ◽  
Vol 6 (8) ◽  
pp. 3397-3401 ◽  
Author(s):  
Jun Chi ◽  
Hongmei Yu ◽  
Guang Jiang ◽  
Jia Jia ◽  
Bowen Qin ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Nanowire Arrays ◽  
Highly Efficient ◽  
Carbonate Hydroxide ◽  
Great Performance ◽  
Double Hydroxides

An orderly hierarchical OER electrode used in an APEWE shows great performance.

Hydrotalcites as Catalysts and Catalysts Precursors for the Synthesis of Biodiesel

2013 ◽  
Vol 571 ◽  
pp. 1-26 ◽  
Author(s):  
Inés Reyero ◽  
Gurutze Arzamendi ◽  
Luis M. Gandía
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Vegetable Oils ◽  
Chemical Stability ◽  
Layered Double Hydroxides ◽  
Reaction Conditions ◽  
Basic Properties ◽  
Transesterification Catalysts ◽  
Double Hydroxides

This chapter aims at providing an overview of the potential of layered double hydroxides (LDHs) or hydrotalcite-like compounds (HTs) for contributing to the catalysis of the synthesis of biodiesel through the transesterification of triglycerides. First, the main methods of preparation of HTs and the most relevantfeatures of these materials are presented, with emphasis on their basic properties. Afterwards, the literature on the use of HTs as catalysts, catalysts precursors, and supports of transesterification catalysts is reviewed. HTs are promising materials for the synthesis of biodiesel from refined and waste vegetable oils, showing reasonable resistance to water and free fatty acids but an improvement of the chemical stability under the desired reaction conditions is still necessary.

scholarly journals Correlations of acidity-basicity of solvent treated layered double hydroxides/oxides and their CO2 capture performance

2020 ◽  
Vol 49 (27) ◽  
pp. 9306-9311 ◽  
Author(s):  
D. W. Justin Leung ◽  
Chunping Chen ◽  
Jean-Charles Buffet ◽  
Dermot O'Hare
Keyword(s):  
Surface Area ◽  
Co2 Capture ◽  
Layered Double Hydroxides ◽  
Acid Base ◽  
Basic Properties ◽  
Double Hydroxides

Acid/basic properties of LDHs can be fine-tuned by using (AMO or AIM) solvent treatments. Furthermore, the CO2 adsorption per surface area increases with increasing acid/base ratio.

scholarly journals High pseudocapacitive cobalt carbonate hydroxide films derived from CoAl layered double hydroxides

Nanoscale ◽  
2012 ◽  
Vol 4 (12) ◽  
pp. 3640 ◽  
Author(s):  
Zhiyi Lu ◽  
Wei Zhu ◽  
Xiaodong Lei ◽  
Gareth R. Williams ◽  
Dermot O'Hare ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Cobalt Carbonate ◽  
Carbonate Hydroxide ◽  
Double Hydroxides

Preparation of Zr-Containing Layered Double Hydroxides and Characterization of the Acido-Basic Properties of Their Mixed Oxides

2002 ◽  
Vol 14 (4) ◽  
pp. 1530-1538 ◽  
Author(s):  
Didier Tichit ◽  
Nigamananda Das ◽  
Bernard Coq ◽  
Robert Durand
Keyword(s):  
Layered Double Hydroxides ◽  
Mixed Oxides ◽  
Basic Properties ◽  
Double Hydroxides

Acceptorless amine dehydrogenation and transamination using Pd-doped layered double hydroxides

2018 ◽  
Author(s):  
Diana Ainembabazi ◽  
Nan An ◽  
Jinesh Manayil ◽  
Kare Wilson ◽  
Adam Lee ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Oxidation States ◽  
Secondary Amines ◽  
Primary Amines ◽  
Acid Dissolution ◽  
Oxidative Amination ◽  
Strong Function ◽  
Excellent Activity ◽  
High Yields ◽  
Double Hydroxides

<div> <p>The synthesis, characterization, and activity of Pd-doped layered double hydroxides (Pd-LDHs) for for acceptorless amine dehydrogenation is reported. These multifunctional catalysts comprise Brønsted basic and Lewis acidic surface sites that stabilize Pd species in 0, 2+, and 4+ oxidation states. Pd speciation and corresponding cataytic performance is a strong function of metal loading. Excellent activity is observed for the oxidative transamination of primary amines and acceptorless dehydrogenation of secondary amines to secondary imines using a low Pd loading (0.5 mol%), without the need for oxidants. N-heterocycles, such as indoline, 1,2,3,4-tetrahydroquinoline, and piperidine, are dehydrogenated to the corresponding aromatics with high yields. The relative yields of secondary imines are proportional to the calculated free energy of reaction, while yields for oxidative amination correlate with the electrophilicity of primary imine intermediates. Reversible amine dehydrogenation and imine hydrogenation determine the relative imine:amine selectivity. Poisoning tests evidence that Pd-LDHs operate heterogeneously, with negligible metal leaching; catalysts can be regenerated by acid dissolution and re-precipitation.</p> </div> <br>

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