Electroanalytical Measurements of Oxide Ions in Molten CaCl2 on W electrode

In inductively coupled plasma/mass spectrometry analyte, M may be distributed among several species forms including doubly charged ions (M2+), singly charged ions (M+), mono-oxide ions (MO+), and hydroxide ions (MOH+). Detailed data are presented for Ba to illustrate the dependence of the ion count of these species and their ratios (M2+/M+, MO+/M+, and MOH+/M+) on nebulizer flow rate, plasma power, and sampling depth. Although these data are representative of most elements, many form oxides to a much greater degree than Ba; data are presented for Ti, W, and Ce to illustrate this fact. These various analyte species are important in that serious interelement interferences can occur because of spectral overlap. An extensive pair of tables indicating potential spectral interferences caused by element oxide, hydroxide, and doubly charged ions is presented.

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Evaluation of Hydrocalumite-Like Compounds as Catalyst Precursors in the Photodegradation of 2,4-Dichlorophenoxyacetic Acid

International Journal of Photoenergy ◽

10.1155/2016/5256941 ◽

2016 ◽

Vol 2016 ◽

pp. 1-13 ◽

Cited By ~ 3

Author(s):

Manuel Sánchez-Cantú ◽

Clara Barcelos-Santiago ◽

Claudia M. Gomez ◽

Esthela Ramos-Ramírez ◽

Ma. de Lourdes Ruiz Peralta ◽

...

Keyword(s):

Diffuse Reflectance ◽

Diffuse Reflectance Spectroscopy ◽

Nitrogen Adsorption ◽

Dichlorophenoxyacetic Acid ◽

X Ray ◽

2,4 Dichlorophenoxyacetic Acid ◽

Adsorption Desorption ◽

Oxide Ions ◽

Environmentally Friendly Method ◽

Simple Economic

Three hydrocalumite-like compounds in a Ca/Al ratio of 2 containing nitrate and acetate anions in the interlaminar region were prepared by a simple, economic, and environmentally friendly method. The solids were characterized by X-ray powder diffraction (XRD), thermogravimetric (TG) analysis, nitrogen adsorption-desorption at −196°C, scanning electron microscopy (SEM), infrared spectroscopy (FTIR), and UV-Vis Diffuse Reflectance Spectroscopy (DRS). The catalytic activity of the calcined solids at 700°C was tested in the photodegradation of 2,4-dichlorophenoxyacetic acid (2,4-D) where 57% degradation of 2,4-D (40 ppm) and a mineralization percentage of 60% were accomplished within 150 minutes. The photocatalytic properties were attributed to mayenite hydration, since the oxide ions in the cages are capable of reacting with water to form hydroxide anions capable of breaking down the 2,4-D molecules.

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Thermodynamic and Kinetic Properties of Oxide Ions in a LiCl–KCl–CsCl Eutectic Melt

Journal of The Electrochemical Society ◽

10.1149/2.048309jes ◽

2013 ◽

Vol 160 (9) ◽

pp. E90-E93 ◽

Cited By ~ 3

Author(s):

Yuya Kado ◽

Takuya Goto ◽

Rika Hagiwara

Keyword(s):

Kinetic Properties ◽

Oxide Ions ◽

Eutectic Melt

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Chemical Synthesis and Properties of Layered Co1-yNiyO2-δOxides (0≤y≤1)

MRS Proceedings ◽

10.1557/proc-658-gg8.12 ◽

2000 ◽

Vol 658 ◽

Author(s):

A. Manthiram ◽

R. V. Chebiam ◽

F. Prado

Keyword(s):

Layer Structure ◽

Magnetic Data ◽

Chemical Analyses ◽

X Ray Diffraction ◽

Absorption Bands ◽

X Ray ◽

Ni Content ◽

Wet Chemical ◽

Oxide Ions ◽

Structure Layer

ABSTRACTLayered Co1-yNiyO2-δ oxides with 0≤y≤1 have been synthesized by chemically extracting lithium from LiNi1-yCoyO2 with NO2PF6 at ambient temperature. The samples have been characterized by X-ray diffraction, wet-chemical analyses, infrared spectroscopy, and magnetic susceptibility measurements. While NiO2-δ retains the initial O3 (CdCl2 structure) layer structure of LiNiO2, CoO2-δ consists of a mixture of P3 and O1 (CdI2 structure) phases that are formed by a sliding of the oxide ions in the initial O3 structure. CoO2-δ and NiO2-δ have oxygen contents of, respectively, 1.67 and 1.95 and the oxygen content increases with increasing Ni content, y, in Co1-yNiyO2-δ. While CoO2-δ exhibits metallic conductivity as revealed by theabsence of absorption bands in the infrared spectrum, NiO2-δ exhibits semiconducting behavior due to a completely filled t2g band. Magnetic data reveal a transition from antiferromagnetic to ferromagnetic correlations as the Ni content in Co1-yNiyO2-δ increases.

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Detection of trapped molecular O2 in a charged Li-rich cathode by Neutron PDF

Energy & Environmental Science ◽

10.1039/d1ee02237g ◽

2022 ◽

Author(s):

Robert House ◽

Helen Y Playford ◽

Ronald Smith ◽

Jennifer Holter ◽

Ian Griffiths ◽

...

Keyword(s):

Energy Density ◽

Cathode Materials ◽

Li Ion Batteries ◽

Li Ion ◽

Oxide Ions

Oxidation and reduction of the oxide ions in the bulk of cathode materials is a potential route towards increasing the energy density of Li-ion batteries. Here, we present neutron PDF...

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Fast-ion conduction and local environments in BIMEVOX

Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rsta.2020.0430 ◽

2021 ◽

Vol 379 (2211) ◽

Author(s):

Harry J. Stroud ◽

Chris E. Mohn ◽

Jean-Alexis Hernandez ◽

Neil L. Allan

Keyword(s):

Density Functional ◽

Energy Landscape ◽

Diffusion Mechanism ◽

Ion Conduction ◽

Functional Theory ◽

Ion Conductor ◽

Local Environments ◽

Fast Ion Conductor ◽

Fast Ion ◽

Oxide Ions

The energy landscape of the fast-ion conductor Bi 4 V 2 O 11 is studied using density functional theory. There are a large number of energy minima, dominated by low-lying thermally accessible configurations in which there are equal numbers of oxygen vacancies in each vanadium–oxygen layer, a range of vanadium coordinations and a large variation in Bi–O and V–O distances. By dividing local minima in the energy landscape into sets of configurations, we then examine diffusion in each different layer using ab initio molecular dynamics. These simulations show that the diffusion mechanism mainly takes place in the 〈110〉 directions in the vanadium layers, involving the cooperative motion of the oxide ions between the O(2) and O(3) sites in these layers, but not O(1) in the Bi–O layers, in agreement with experiment. O(1) vacancies in the Bi–O layers are readily filled by the migration of oxygens from the V–O layers. The calculated ionic conductivity is in reasonable agreement with the experiment. We compare ion conduction in δ-Bi 4 V 2 O 11 with that in δ-Bi 2 O 3 . This article is part of the Theo Murphy meeting issue ‘Understanding fast-ion conduction in solid electrolytes’.

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