The effect of different types of additives on the catalytic activity of Au/Al2O3 in propene total oxidation: transition metal oxides and ceria

2005 ◽  
Vol 229 (1) ◽  
pp. 154-162 ◽  
Author(s):  
A GLUHOI ◽  
N BOGDANCHIKOVA ◽  
B NIEUWENHUYS
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Total Oxidation ◽  
Different Types

Polymeric Heterogeneous Catalysts of Transition-Metal Oxides: Surface Characterization, Physicomechanical Properties, and Catalytic Activity

ChemPhysChem ◽  
2013 ◽  
Vol 14 (18) ◽  
pp. 4149-4157 ◽  
Author(s):  
Bui Dinh Nhi ◽  
Renat Maratovich Akhmadullin ◽  
Alfiya Garipovna Akhmadullina ◽  
Yakov Dmitrievich Samuilov ◽  
Svetlana Ivanova Aghajanian
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Surface Characterization ◽  
Heterogeneous Catalysts ◽  
Physicomechanical Properties

A general doping rule: rational design of Ir-doped catalysts for the oxygen evolution reaction

2020 ◽  
Vol 56 (96) ◽  
pp. 15201-15204
Author(s):  
Chuan Zhou ◽  
Haiyang Yuan ◽  
P. Hu ◽  
Haifeng Wang
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Metal Oxides ◽  
Oxygen Evolution ◽  
Transition Metal Oxides ◽  
Oxygen Evolution Reaction ◽  
Rational Design

Revealing how to rationally select a suitable dopant or the host counterpart is greatly important for optimizing the catalytic activity of transition metal oxides (TMOs).

HREM Study of electron-induced surface radiation damage in ReO3

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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