scholarly journals Catalytic behaviors of combined oxides derived from Mg/AlxFe1−x–Cl layered double hydroxides for H2S selective oxidation

2015 ◽  
Vol 5 (11) ◽  
pp. 4991-4999 ◽  
Author(s):  
Xin Zhang ◽  
Zhuo Wang ◽  
Yuyin Tang ◽  
Nanli Qiao ◽  
Yang Li ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Layered Double Hydroxides ◽  
Elemental Sulfur ◽  
Basic Site ◽  
Double Hydroxides

H2S was firstly adsorbed on the moderated basic site and then oxidized into elemental sulfur by Fe3+.

Selective oxidation catalysts obtained by immobilization of iron(III) porphyrins on thiosalicylic acid-modified Mg-Al layered double hydroxides

2016 ◽  
Vol 478 ◽  
pp. 374-383 ◽  
Author(s):  
Kelly Aparecida Dias de Freitas Castro ◽  
Fernando Wypych ◽  
Ariana Antonangelo ◽  
Karen Mary Mantovani ◽  
Alesandro Bail ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Layered Double Hydroxides ◽  
Oxidation Catalysts ◽  
Thiosalicylic Acid ◽  
Double Hydroxides ◽  
Selective Oxidation Catalysts

Layered Double Hydroxides-Based Materials as Oxidation Catalysts

2017 ◽  
pp. 59-121 ◽  
Author(s):  
Ioan-Cezar Marcu ◽  
Adriana Urdă ◽  
Ionel Popescu ◽  
Vasile Hulea
Keyword(s):  
Volatile Organic Compounds ◽  
Transition Metal ◽  
Organic Compounds ◽  
Selective Oxidation ◽  
Layered Double Hydroxides ◽  
Complete Oxidation ◽  
Oxidation Catalysts ◽  
Volatile Organic ◽  
Potential Applications ◽  
Double Hydroxides

This chapter is focused on the transition-metal-containing LDHs-based materials having potential applications in both catalytic selective oxidation for obtaining chemicals and intermediates, and complete oxidation as a promising valuable technology for the destruction of Volatile Organic Compounds (VOCs).

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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