Theoretical Insights into the Catalytic Effect of Transition-Metal Ions on the Aquathermal Degradation of Sulfur-Containing Heavy Oil: A DFT Study of Cyclohexyl Phenyl Sulfide Cleavage

Abstract The mechanisms of antioxidant activity are briefly reviewed. Antioxidant systems based on catalase-active compounds, and the use of sulfur-containing metal complexes and transition metal ions as antioxidants are discussed.

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Catalytic Effect of Configuration Structures of Transition Metal Ions in Catalysts with Highly Dispersed and Isolated Active Sites on the Selective Oxidation of Propane

ACTA AGRONOMICA SINICA ◽

10.3724/sp.j.1095.2013.20536 ◽

2013 ◽

Vol 30 (5) ◽

pp. 516

Author(s):

Liyan HAN ◽

Xiaoqiang FAN ◽

Zhe ZHANG ◽

Hongxuan WANG ◽

Jian LIU

Keyword(s):

Transition Metal ◽

Metal Ions ◽

Selective Oxidation ◽

Active Sites ◽

Catalytic Effect ◽

Transition Metal Ions ◽

Highly Dispersed

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Homogeneous Catalytic Oxidation of Aqueous Sulfur(IV) by Transition Metal Ions, Part III: Effect of Iron(III), Copper(II) and Manganese(II) and Synergistic Catalysis

Water Science & Technology ◽

10.2166/wst.1988.0122 ◽

1988 ◽

Vol 20 (10) ◽

pp. 45-47 ◽

Cited By ~ 7

Author(s):

M. Reda

Keyword(s):

Transition Metal ◽

Metal Ions ◽

Catalytic Oxidation ◽

Catalytic Effect ◽

Transition Metal Ions ◽

Distilled Water ◽

Synergistic Catalysis

The general effects of Fe(III), Cu(II) and Mn(II) on the homogeneous catalytic auto-oxidation of aqueous sulfur(IV) were investigated. The results indicated that Fe(III) and Mn(II) are effective catalysts, and Cu(II) has a slight catalytic effect compared with distilled water. The apparent synergisms existing between Mn(II) and Cu(II), Mn(II) and Fe(III), and Fe(III) and Cu(II) were investigated.

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Direct Evidence of Orbital Mixing between Water and Solvated Transition-Metal Ions: An Oxygen 1s XAS and DFT Study of Aqueous Systems

The Journal of Physical Chemistry A ◽

10.1021/jp034296h ◽

2003 ◽

Vol 107 (35) ◽

pp. 6869-6876 ◽

Cited By ~ 53

Author(s):

Lars-Åke Näslund ◽

Matteo Cavalleri ◽

Hirohito Ogasawara ◽

Anders Nilsson ◽

Lars G. M. Pettersson ◽

...

Keyword(s):

Transition Metal ◽

Metal Ions ◽

Direct Evidence ◽

Transition Metal Ions ◽

Dft Study ◽

Aqueous Systems ◽

Orbital Mixing

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HREM Study of electron-induced surface radiation damage in ReO3

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100087495 ◽

1991 ◽

Vol 49 ◽

pp. 636-637

Author(s):

R. Ai ◽

H.-J. Fan ◽

L. D. Marks

Keyword(s):

Transition Metal ◽

Metal Ions ◽

Metal Oxides ◽

Electron Irradiation ◽

Transition Metal Oxides ◽

Carbon Film ◽

Transition Metal Ions ◽

Surface Radiation ◽

Valence Transition ◽

Electron Microscopes

It has been known for a long time that electron irradiation induces damage in maximal valence transition metal oxides such as TiO2, V2O5, and WO3, of which transition metal ions have an empty d-shell. This type of damage is excited by electronic transition and can be explained by the Knoteck-Feibelman mechanism (K-F mechanism). Although the K-F mechanism predicts that no damage should occur in transition metal oxides of which the transition metal ions have a partially filled d-shell, namely submaximal valence transition metal oxides, our recent study on ReO3 shows that submaximal valence transition metal oxides undergo damage during electron irradiation.ReO3 has a nearly cubic structure and contains a single unit in its cell: a = 3.73 Å, and α = 89°34'. TEM specimens were prepared by depositing dry powders onto a holey carbon film supported on a copper grid. Specimens were examined in Hitachi H-9000 and UHV H-9000 electron microscopes both operated at 300 keV accelerating voltage. The electron beam flux was maintained at about 10 A/cm2 during the observation.

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