Role of Au−C Interactions on the Catalytic Activity of Au Nanoparticles Supported on TiC(001) toward Molecular Oxygen Dissociation

Mechanism of catalysis with binary and triple catalytic systems based on redox inactive metal (lithium) compound {LiSt+L2} and {LiSt+L2+PhOH} (L2=DMF or HMPA), in the selective ethylbenzene oxidation by dioxygen into -phenylethyl hydroperoxide is researched. The results are compared with catalysis by nickel-lithium triple system {NiII(acac)2+LiSt+PhOH} in selective ethylbenzene oxidation to PEH. The role of H-bonding in mechanism of catalysis is discussed. The possibility of the stable supramolecular nanostructures formation on the basis of triple systems, {LiSt+L2+PhOH}, due to intermolecular H-bonds, is researched with the AFM method.

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Molecular oxygen dissociation on tin carbide monolayers with gold adatoms

Materials Letters ◽

10.1016/j.matlet.2021.129675 ◽

2021 ◽

pp. 129675

Author(s):

Alma L. Marcos-Viquez ◽

Álvaro Miranda ◽

Miguel Cruz-Irisson ◽

Luis A. Pérez

Keyword(s):

Molecular Oxygen ◽

Oxygen Dissociation ◽

Gold Adatoms

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Assessment of the abiotic transformation of 17β-estradiol in the presence of vegetable matter – II: The role of molecular oxygen

Chemosphere ◽

10.1016/j.chemosphere.2011.12.054 ◽

2012 ◽

Vol 87 (5) ◽

pp. 521-526 ◽

Cited By ~ 6

Author(s):

Ruth Marfil-Vega ◽

Makram T. Suidan ◽

Marc A. Mills

Keyword(s):

Molecular Oxygen ◽

Abiotic Transformation ◽

17Β Estradiol

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Role of Lysyl ε-Amino Groups in Adenosine Diphosphate Binding and Catalytic Activity of Pyruvate Kinase

Journal of Biological Chemistry ◽

10.1016/s0021-9258(18)62415-9 ◽

1971 ◽

Vol 246 (4) ◽

pp. 946-953 ◽

Cited By ~ 7

Author(s):

Paul F. Hollenberg ◽

Michael Flashner ◽

Minor J. Coon

Keyword(s):

Catalytic Activity ◽

Pyruvate Kinase ◽

Adenosine Diphosphate ◽

Amino Groups

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Role of CO2 During Oxidative Dehydrogenation of Propane Over Bulk and Activated-Carbon Supported Cerium and Vanadium Based Catalysts

Catalysis Letters ◽

10.1007/s10562-020-03519-y ◽

2021 ◽

Author(s):

Petar Djinović ◽

Janez Zavašnik ◽

Janvit Teržan ◽

Ivan Jerman

Keyword(s):

Catalytic Activity ◽

Activated Carbon ◽

Oxidative Dehydrogenation ◽

Active Phase ◽

Lattice Oxygen ◽

Chemisorbed Oxygen ◽

Catalytically Active ◽

Temperature Programmed ◽

Propane Cracking

AbstractCeO2, V2O5 and CeVO4 were synthesised as bulk oxides, or deposited over activated carbon, characterized by XRD, HRTEM, CO2-TPO, C3H8-TPR, DRIFTS and Raman techniques and tested in propane oxidative dehydrogenation using CO2. Complete oxidation of propane to CO and CO2 is favoured by lattice oxygen of CeO2. The temperature programmed experiments show the ~ 4 nm AC supported CeO2 crystallites become more susceptible to reduction by propane, but less prone to re-oxidation with CO2 compared to bulk CeO2. Catalytic activity of CeVO4/AC catalysts requires a 1–2 nm amorphous CeVO4 layer. During reaction, the amorphous CeVO4 layer crystallises and several atomic layers of carbon cover the CeVO4 surface, resulting in deactivation. During reaction, V2O5 is irreversibly reduced to V2O3. The lattice oxygen in bulk V2O5 favours catalytic activity and propene selectivity. Bulk V2O3 promotes only propane cracking with no propene selectivity. In VOx/AC materials, vanadium carbide is the catalytically active phase. Propane dehydrogenation over VC proceeds via chemisorbed oxygen species originating from the dissociated CO2. Graphic Abstract

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