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Transition-metal oxide

Massidda S, Continenza A, Posternak M and Baldereschi A 1997 Quasiparticle energy bands of transition-metal oxides within a model GW scheme Phys. Rev. B 55 13 494-502... [Pg.2230]

Svane A and Gunnarsson Q 1990 Transition-metal oxides in the self-interaction-corrected density-functional formalism Phys. Rev. Lett. 65 1148... [Pg.2230]

Szotek Z, Temmerman W M and Winter H 1993 Application of the self-interaction correction to transition-metal oxides Phys. Rev. B 47 4029... [Pg.2230]

Wang L S 2000 Photodetachment photoelectron spectroscopy of transition metal oxide species Photoionization and Photodetaohment Advanced Series in Physical Chemistry 10, ed C Y Ng (Singapore World Scientific)... [Pg.2407]

The mechanisms by which transition metal oxidizing agents convert alcohols to aldehydes and ketones are complicated with respect to their inorganic chemistry The organic chemistry is clearer and one possible mechanism is outlined m Figure 15 4 The... [Pg.643]

Several kinds of conduction mechanisms are operative in ceramic thermistors, resistors, varistors, and chemical sensors. Negative temperature coefficient (NTC) thermistors make use of the semiconducting properties of heavily doped transition metal oxides such as n-ty e Ti O andp-ty e... [Pg.309]

NL Li O. Thick film resistors are also made from transition-metal oxide soHd solutions. Glass-bonded Bi... [Pg.309]

Reaction with Meta/ Oxides. The reaction of hydrogen chloride with the transition-metal oxides at elevated temperatures has been studied extensively. Fe202 reacts readily at temperatures as low as 300°C to produce FeCl and water. The heavier transition-metal oxides require a higher reaction temperature, and the primary reaction product is usually the corresponding oxychlorides. Similar reactions are reported for many other metal oxides, such as Sb202, BeO, AI2O2, andTi02, which lead to the formation of relatively volatile chlorides or oxychlorides. [Pg.444]

Alcohol autoxidation is carried out in the range of 70—160°C and 1000—2000 kPa (10—20 atm). These conditions maintain the product and reactants as Hquids and are near optimum for practical hydrogen peroxide production rates. Several additives including acids, nitriles, stabHizers, and sequestered transition-metal oxides reportedly improve process economics. The product mixture, containing hydrogen peroxide, water, acetone, and residual isopropyl alcohol, is separated in a wiped film evaporator. The organics and water are taken overhead and further refined to recover by-product acetone and the... [Pg.476]

Alkali metal haHdes can be volatile at incineration temperatures. Rapid quenching of volatile salts results in the formation of a submicrometer aerosol which must be removed or else exhaust stack opacity is likely to exceed allowed limits. Sulfates have low volatiHty and should end up in the ash. Alkaline earths also form basic oxides. Calcium is the most common and sulfates are formed ahead of haHdes. Calcium carbonate is not stable at incineration temperatures (see Calcium compounds). Transition metals are more likely to form an oxide ash. Iron (qv), for example, forms ferric oxide in preference to haHdes, sulfates, or carbonates. SiHca and alumina form complexes with the basic oxides, eg, alkaH metals, alkaline earths, and some transition-metal oxidation states, in the ash. [Pg.58]

N. Singh, "VOC Destmetion at Low Temperatures Using a Novel Thermally Stable Transition-Metal Oxide-Based Catalyst," presented at the First North American Conference on Emerging Clean Air Technologies and Business Opportunities, Toronto, Canada, Sept. 1994. [Pg.531]

P. A. Cox, Transition Metal Oxides, Oxford University Press, New York, 1995. [Pg.135]

MetaUic conduction occurs in transition-metal oxides such as ReO, vanadium(II) oxide [12035-98-2] VO, titanium(II) oxide [12137-20-17,... [Pg.357]

Oxidation catalysts are either metals that chemisorb oxygen readily, such as platinum or silver, or transition metal oxides that are able to give and take oxygen by reason of their having several possible oxidation states. Ethylene oxide is formed with silver, ammonia is oxidized with platinum, and silver or copper in the form of metal screens catalyze the oxidation of methanol to formaldehyde. Cobalt catalysis is used in the following oxidations butane to acetic acid and to butyl-hydroperoxide, cyclohexane to cyclohexylperoxide, acetaldehyde to acetic acid and toluene to benzoic acid. PdCh-CuCb is used for many liquid-phase oxidations and V9O5 combinations for many vapor-phase oxidations. [Pg.2095]

Volume 45 Transition Metal Oxides. Surface Chemistry and Catalysis by H.H. Kung... [Pg.263]

This process has many similarities to the Phillips process and is based on the use of a supported transition metal oxide in combination with a promoter. Reaction temperatures are of the order of 230-270°C and pressures are 40-80 atm. Molybdenum oxide is a catalyst that figures in the literature and promoters include sodium and calcium as either metals or as hydrides. The reaction is carried out in a hydrocarbon solvent. [Pg.211]

The use of supported transition metal oxide and Ziegler-Natta-type catalysts for polymerising aliphatic olefins (alkenes) was extended in the 1960s and 1970s to the ring-opening polymerisation of cyclo-olefins. [Pg.304]

Raman spectroscopy has provided information on catalytically active transition metal oxide species (e. g. V, Nb, Cr, Mo, W, and Re) present on the surface of different oxide supports (e.g. alumina, titania, zirconia, niobia, and silica). The structures of the surface metal oxide species were reflected in the terminal M=0 and bridging M-O-M vibrations. The location of the surface metal oxide species on the oxide supports was determined by monitoring the specific surface hydroxyls of the support that were being titrated. The surface coverage of the metal oxide species on the oxide supports could be quantitatively obtained, because at monolayer coverage all the reactive surface hydroxyls were titrated and additional metal oxide resulted in the formation of crystalline metal oxide particles. The nature of surface Lewis and Bronsted acid sites in supported metal oxide catalysts has been determined by adsorbing probe mole-... [Pg.261]

Transition metal oxides or their combinations with metal oxides from the lower row 5 a elements were found to be effective catalysts for the oxidation of propene to acrolein. Examples of commercially used catalysts are supported CuO (used in the Shell process) and Bi203/Mo03 (used in the Sohio process). In both processes, the reaction is carried out at temperature and pressure ranges of 300-360°C and 1-2 atmospheres. In the Sohio process, a mixture of propylene, air, and steam is introduced to the reactor. The hot effluent is quenched to cool the product mixture and to remove the gases. Acrylic acid, a by-product from the oxidation reaction, is separated in a stripping tower where the acrolein-acetaldehyde mixture enters as an overhead stream. Acrolein is then separated from acetaldehyde in a solvent extraction tower. Finally, acrolein is distilled and the solvent recycled. [Pg.215]

A thin layer deposited between the electrode and the charge transport material can be used to modify the injection process. Some of these arc (relatively poor) conductors and should be viewed as electrode materials in their own right, for example the polymers polyaniline (PAni) [81-83] and polyethylenedioxythiophene (PEDT or PEDOT) [83, 841 heavily doped with anions to be intrinsically conducting. They have work functions of approximately 5.0 cV [75] and therefore are used as anode materials, typically on top of 1TO, which is present to provide lateral conductivity. Thin layers of transition metal oxide on ITO have also been shown [74J to have better injection properties than ITO itself. Again these materials (oxides of ruthenium, molybdenum or vanadium) have high work functions, but because of their low conductivity cannot be used alone as the electrode. [Pg.537]

The Structural Stability of Transition Metal Oxide Insertion Electrodes for Lithium Batteries... [Pg.293]


See other pages where Transition-metal oxide is mentioned: [Pg.69]    [Pg.108]    [Pg.281]    [Pg.635]    [Pg.1786]    [Pg.1787]    [Pg.2209]    [Pg.2219]    [Pg.2398]    [Pg.385]    [Pg.233]    [Pg.212]    [Pg.345]    [Pg.357]    [Pg.359]    [Pg.213]    [Pg.216]    [Pg.233]    [Pg.658]    [Pg.341]    [Pg.342]    [Pg.987]    [Pg.236]    [Pg.250]    [Pg.255]    [Pg.186]    [Pg.48]    [Pg.293]   
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3D-Transition Metal Oxides

Alkenes transition metal peroxide oxidation

Amide oxides reactions with transition metal atoms

Amines transition metal peroxide oxidation

Associated with Transition Metal Oxides

Carbon/transition metal oxide

Carbon/transition metal oxide composites

Catalysis transition metal oxides

Catalysis transition metal-catalyzed alcohol oxidation

Catalytic activity transition metal oxides, related

Cation valence states, of transitional metal oxides

Defects on the Surfaces of Transition Metal Oxides

Defects transition metal oxides

Dioxygen species transition metal oxides

Esters transition metal oxidation

Exchange over transition metal oxides

First row transition metal oxides

First-Row Transition Metal Oxide Nanocomposites with Unusual Performance

Functional Theory and Transition Metal Oxides, Ewa Broclawik

General Perspective on Current Transients from Transition Metal Oxides and Graphite

Glasses containing transition metal oxides

Ground State Properties of Transition Metal Oxides

High-oxidation state transition-metal fluorides

Highly Dispersed Transition Metal Ions in Oxides or Zeotype-Systems by PL Spectroscopy

Illustration 1 Transition Metal Oxides with Vertex-Sharing Octahedra

Initiators transition metal oxides

Interface between Transition Metal Oxides-Based Electrodes and Lithium Salts Electrolytes A Physicochemical Approach

Ketones transition metal oxidation

Lattice transition metal oxide, role

Layered Oxides of Transition Metals

Ligand Effects for Transition Metal Oxides

Ligands, transition-metal oxidation

Lithiated transition metal oxides

Lithium transition metal oxides

Low oxidation state transition metals

Macroporous transition metal oxide

Macroporous transition metal oxide materials

Macroporous transition metal oxide preparation

Magnetic semiconductors transition-metal oxides

Main group element oxides reactions with transition metal complexes

Mesoporous transition metal oxide

Mesoporous transition metal oxide hard template method

Mesoporous transition metal oxide materials

Metal oxide bulk doping transition metals

Metal oxide electrodes, transition

Metal oxides, catalysts Metals, transition, substrates

Microporous transition metal oxide

Microporous transition metal oxide materials

Nitric oxide complexes with transition metals

Nitric oxide transition metal complexes

Nitric oxide transition metal nitrosyl complexes

Nitrous oxide transition metal complexes

Olefin metathesis over transition metal oxides

Ordered Porous Crystalline Transition Metal Oxides

Organic transition metal oxides

Organohalides transition-metal oxides

Other Common Transition Metal Oxidants

Oxidation number transition metal

Oxidation of transition metal complexes by hydroxyl radicals

Oxidation of transition metal ions in sedimentary processes

Oxidation reactions, transition-metal

Oxidation reactions, transition-metal Sharpless titanium

Oxidation reactions, transition-metal asymmetric epoxidation

Oxidation reactions, transition-metal catalysts

Oxidation reactions, transition-metal natural products synthesis

Oxidation reactions, transition-metal resolution

Oxidation reactions, transition-metal vanadium

Oxidation states Arbitrary transition metals

Oxidation states of inner transition metals

Oxidation states of transition metal ions

Oxidation states of transition metals

Oxidation states transition metal dithiocarbamates

Oxidation transition metal peroxides

Oxidation transition metal-catalyzed

Oxidation with transition metal salts

Oxidation, by transition-metal ions

Oxidation-Reduction Conversion of Transition Metals

Oxidation-reduction reactions transition metals

Oxidative addition reactions transition metal complexes

Oxidative addition transition metal complexes

Oxidative coupling transition metal catalysis

Oxidative-addition reactions of transition metal complexes

Oxides of transition metals

Oxygen early transition metal oxides

Particular transition metal oxides

Promoter transition metal oxides

Radicals transition metal peroxide oxidation

Reactions with transition-metal oxides

Redox processes transition metal salt oxidation

Reduced transition metal oxide catalysts on support

Reduction potentials, transition metal oxide-hydroxides

Semiconducting properties transition metal oxides

Semiconductors transition metal oxide surfaces

Stability transition metal oxide insertion

Structural Insight into Transition Metal Oxide Containing Glasses by Molecular Dynamic Simulations

Subject transition metal oxides

Sulfides transition metal peroxide oxidation

Supported transition metal oxides

Synthesis of Organically Modified Transition Metal Oxide Clusters

TRANSITION METAL OXIDES AND SULFIDES

The Oxide and Sulfide Catalysts of Transition Metals

The carburizing and oxidation of transition metals

Transition Metal Oxidants

Transition Metal Oxide Diatomics as the Quality Gauge for Experiment and Theory

Transition Metal Oxides Magnetoresistance and Half-Metallicity

Transition Metal Oxides Superconductivity, Charge-Ordering

Transition Metal Oxides and Salts

Transition Metal Oxides and the Effect of Stoichiometry

Transition Metal Oxides with Partially Filled d Bands

Transition Metal Salts and Oxides on Alumina

Transition Metal-Catalyzed Aerobic Oxidations in Continuous Flow

Transition metal atoms formal oxidation states

Transition metal auto-oxidation reaction

Transition metal catalysis amine oxidation

Transition metal catalysis oxidation

Transition metal catalysts alcohol oxidation

Transition metal catalytic oxidation methods

Transition metal centres, oxidative addition

Transition metal clusters oxidation reactions

Transition metal clusters oxidative addition reactions

Transition metal complex oxides

Transition metal complexes amine oxides

Transition metal complexes multiple oxidation states

Transition metal complexes oxidation

Transition metal complexes oxide fluorides

Transition metal in oxidations

Transition metal nitric oxide, binding

Transition metal nucleophiles oxidation potentials

Transition metal oxidation catalysts

Transition metal oxidation catalysts kinetics

Transition metal oxidative cross-coupling reactions

Transition metal oxide aerogels, through

Transition metal oxide halides

Transition metal oxide oxides

Transition metal oxide oxides

Transition metal oxide-hydroxides

Transition metal oxides catalytic activity

Transition metal oxides cation valence states

Transition metal oxides chromium oxide

Transition metal oxides dioxygen adducts

Transition metal oxides double perovskites

Transition metal oxides electrochromic devices

Transition metal oxides excited states

Transition metal oxides ground state properties

Transition metal oxides half-metallicity

Transition metal oxides iron group oxide

Transition metal oxides magnetoresistance

Transition metal oxides molybdenum oxide

Transition metal oxides oxide materials

Transition metal oxides oxide materials Mesoporous

Transition metal oxides phosgene

Transition metal oxides preparation

Transition metal oxides selective oxidation

Transition metal oxides spectroscopy

Transition metal oxides structure

Transition metal oxides titanium oxide

Transition metal oxides tungsten oxide

Transition metal oxides vanadium oxide

Transition metal oxides, spectroscopic

Transition metal oxides, spectroscopic characterization

Transition metal oxidizing reagents

Transition metal substrates oxidation

Transition metal sulfides oxide precursors, sulfidation

Transition metal vapor cryochemistry oxidative addition

Transition metal-catalyzed aerobic oxidations

Transition metal-promoted oxidations

Transition metals and oxides

Transition metals elements oxidation state

Transition metals molecules oxidized

Transition metals oxidation

Transition metals oxidation

Transition metals oxidation states

Transition metals oxidation states and

Transition metals oxidation with dimethyl sulfoxide

Transition metals oxidative-addition reactions

Transition metals, controlled oxidation

Transition oxides

Transition-Metal-Catalyzed Stereoselective Oxidations in Drug and Natural Product Synthesis

Transition-Metal-Mediated Oxidative Coupling

Transition-metal derivatives oxidative addition methods

Transition-metal ions oxidation

Transition-metal ions, oxidative polymerization

Transition-metal oxide containing

Transition-metal oxide containing reaction

Transition-metal oxides hydrogen

Transition-metal oxides methanation

Transition-metal oxides methanol synthesis

Transition-metal oxides properties

Transition-metal oxides, decompositions

Transition-metal-oxide cluster

Transitional metal oxides

Vacancies transition metal oxide surfaces

Various Oxidation States of Transition Metals

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