Study on the Catalytic Performance of CuO-CeO2 Catalysts Doped with Transition Metal Oxides for Selective CO Oxidation

A series of transition metal oxides or mixed oxides supported nano-Au catalysts were prepared for the selective oxidation of glycerol to glyceric acid using 3% H2O2. It was found that the composition and structure of supports significantly influenced the catalytic performance of catalysts. The mesoporous trimetal mixed oxide (CuNiAlO) supported nano-Au catalysts were more active in comparison with the others. In the present catalytic system, the highest glycerol conversion was 90.5%, while the selectivity of glyceric acid could reach 72%. Moreover, the catalytic performance remained after 11 times of reaction.

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Silicate coatings on titanium, modified with transition metal oxides and their activity in CO oxidation

Russian Journal of Applied Chemistry ◽

10.1134/s1070427213030051 ◽

2013 ◽

Vol 86 (3) ◽

pp. 319-325 ◽

Cited By ~ 6

Author(s):

I. V. Chernykh ◽

I. V. Lukiyanchuk ◽

V. S. Rudnev ◽

P. M. Nedozorov ◽

L. M. Tyrina ◽

...

Keyword(s):

Transition Metal ◽

Metal Oxides ◽

Co Oxidation ◽

Transition Metal Oxides

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A Facile Way To Improve Pt Atom Efficiency for CO Oxidation at Low Temperature: Modification by Transition Metal Oxides

ACS Catalysis ◽

10.1021/acscatal.9b01679 ◽

2019 ◽

Vol 9 (7) ◽

pp. 6177-6187 ◽

Cited By ~ 20

Author(s):

Shaofei Song ◽

Yujin Wu ◽

Shasha Ge ◽

Li Wang ◽

Yunsong Wang ◽

...

Keyword(s):

Low Temperature ◽

Transition Metal ◽

Metal Oxides ◽

Co Oxidation ◽

Transition Metal Oxides ◽

Temperature Modification

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Fast cation exchange of layered sodium transition metal oxides for boosting oxygen evolution activity and enhancing durability

Journal of Materials Chemistry A ◽

10.1039/d0ta02417a ◽

2020 ◽

Vol 8 (16) ◽

pp. 8075-8083

Author(s):

Shiyong Chu ◽

Daqin Guan ◽

Hainan Sun ◽

Liangshuang Fei ◽

Zhiwei Hu ◽

...

Keyword(s):

Transition Metal ◽

Metal Oxides ◽

Cation Exchange ◽

Oxygen Evolution ◽

Transition Metal Oxides ◽

Catalytic Performance ◽

Ex Situ

An ex situ ultra-fast cation exchange strategy to develop superior OER electrocatalysts with outstanding catalytic performance is developed.

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Composites with transition metal oxides on aluminum and titanium and their activity in CO oxidation

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2012.10.031 ◽

2013 ◽

Vol 231 ◽

pp. 433-438 ◽

Cited By ~ 15

Author(s):

I.V. Lukiyanchuk ◽

V.S. Rudnev ◽

I.V. Chernykh ◽

I.V. Malyshev ◽

L.M. Tyrina ◽

...

Keyword(s):

Transition Metal ◽

Metal Oxides ◽

Co Oxidation ◽

Transition Metal Oxides

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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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Problems with oxygen analysis in the system MgO-Al2O3-SiO2 with the electron microprobe

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100132753 ◽

1992 ◽

Vol 50 (2) ◽

pp. 1624-1625

Author(s):

Michel Fialin ◽

Guy Rémond

Keyword(s):

Transition Metal ◽

Metal Oxides ◽

Transition Metal Oxides ◽

Electrostatic Charge ◽

Carbon Layer ◽

Sample Holder ◽

Rock Matrix ◽

Electrical Discharges ◽

Thin Carbon ◽

Beam Instabilities

Oxygen-bearing minerals are generally strong insulators (e.g. silicates), or if not (e.g. transition metal oxides), they are included within a rock matrix which electrically isolates them from the sample holder contacts. In this respect, a thin carbon layer (150 Å in our laboratory) is evaporated on the sections in order to restore the conductivity. For silicates, overestimated oxygen concentrations are usually noted when transition metal oxides are used as standards. These trends corroborate the results of Bastin and Heijligers on MgO, Al2O3 and SiO2. According to our experiments, these errors are independent of the accelerating voltage used (fig.l).Owing to the low density of preexisting defects within the Al2O3 single-crystal, no significant charge buildup occurs under irradiation at low accelerating voltage (< 10keV). As a consequence, neither beam instabilities, due to electrical discharges within the excited volume, nor losses of energy for beam electrons before striking the sample, due to the presence of the electrostatic charge-induced potential, are noted : measurements from both coated and uncoated samples give comparable results which demonstrates that the carbon coating is not the cause of the observed errors.

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