OxygenKx-ray-absorption near-edge structure of alkaline-earth-metal and 3d-transition-metal oxides

Ion doping in transition metal oxides is always considered to be one of the most effective methods to obtain high-performance electrochemical supercapacitors because of the introduction of defective surfaces as well as the enhancement of electrical conductivity. Inspired by the smelting process, an ancient method, quenching is introduced for doping metal ions into transition metal oxides with intriguing physicochemical properties. Herein, as a proof of concept, α-Fe2O3 nanorods grown on carbon cloths (α-Fe2O3@CC) heated at 400 °C are rapidly put into different aqueous solutions of alkaline earth metal salts at 4 °C to obtain electrodes doped with different alkaline earth metal ions (M-Fe2O3@CC). Among them, Sr-Fe2O3@CC shows the best electrochemical capacitance, reaching 77.81 mF cm−2 at the current of 0.5 mA cm−2, which is 2.5 times that of α-Fe2O3@CC. The results demonstrate that quenching is a feasible new idea for improving the electrochemical performances of nanostructured materials.

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Alkaline-earth Metal Substitution Stabilizes Anionic Redox of Li-rich Oxides

Journal of Materials Chemistry A ◽

10.1039/d1ta00282a ◽

2021 ◽

Author(s):

haoxin li ◽

Xiaolin Zhao ◽

yining li ◽

yang gan ◽

Wujie Qiu ◽

...

Keyword(s):

Energy Density ◽

Transition Metal ◽

Metal Oxides ◽

Transition Metal Oxides ◽

Alkaline Earth ◽

Earth Metal ◽

Rechargeable Batteries ◽

Alkaline Earth Metal ◽

Metal Substitution ◽

New Paradigm

Anionic oxygen redox chemistry in Li-excess transition metal oxides has emerged as a new paradigm to increase the energy density of rechargeable batteries. However, anionic redox of oxygen mostly often...

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Screening and characterization of ternary oxides for high temperature carbon capture

10.26434/chemrxiv.5563204 ◽

2018 ◽

Author(s):

Michael Gaultois ◽

Matthew T Dunstan ◽

Adam W Bateson ◽

Martin Chan ◽

Clare P Grey

Keyword(s):

Crystal Structure ◽

Transition Metal ◽

Metal Oxides ◽

Transition Metal Oxides ◽

Carbon Capture ◽

Alkaline Earth ◽

Earth Metal ◽

Absorption Capacity ◽

Ternary Metal

<div>This work describes the experimental characterisation and CO<sub>2</sub> sorption properties of several new ternary transition metal oxides predicted by high-throughput DFT screening. One material reported here, Li<sub>5</sub>SbO<sub>5</sub>, displays reversible CO<sub>2</sub> sorption, and maintains ~72% of its theoretical capacity out to 25 cycles. <br></div><div>The results in this work are used to discuss major influences on CO<sub>2</sub> absorption capacity and rate, including the role of the crystal structure, the transition metal, the alkali or alkaline earth metal, and the competing roles of thermodynamics and kinetics. </div><div>Notably, this work shows the extent and rate to which ternary metal oxides carbonate is driven primarily by the identity of the alkali or alkaline earth ion and the nature of the crystal structure, whereas the identity of the transition ion carries little influence in the systems studied here.</div>

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Screening and characterization of ternary oxides for high temperature carbon capture

10.26434/chemrxiv.5563204.v2 ◽

2018 ◽

Author(s):

Michael Gaultois ◽

Matthew T Dunstan ◽

Adam W Bateson ◽

Martin Chan ◽

Clare P Grey

Keyword(s):

Crystal Structure ◽

Transition Metal ◽

Metal Oxides ◽

Transition Metal Oxides ◽

Carbon Capture ◽

Alkaline Earth ◽

Earth Metal ◽

Absorption Capacity ◽

Ternary Metal

<div>This work describes the experimental characterisation and CO<sub>2</sub> sorption properties of several new ternary transition metal oxides predicted by high-throughput DFT screening. One material reported here, Li<sub>5</sub>SbO<sub>5</sub>, displays reversible CO<sub>2</sub> sorption, and maintains ~72% of its theoretical capacity out to 25 cycles. <br></div><div>The results in this work are used to discuss major influences on CO<sub>2</sub> absorption capacity and rate, including the role of the crystal structure, the transition metal, the alkali or alkaline earth metal, and the competing roles of thermodynamics and kinetics. </div><div>Notably, this work shows the extent and rate to which ternary metal oxides carbonate is driven primarily by the identity of the alkali or alkaline earth ion and the nature of the crystal structure, whereas the identity of the transition ion carries little influence in the systems studied here.</div>

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High-throughput DFT screening and experimental characterization of ternary oxides for high temperature carbon capture and storage

10.26434/chemrxiv.5563204.v1 ◽

2017 ◽

Author(s):

Michael Gaultois ◽

Matthew T Dunstan ◽

Adam W Bateson ◽

Martin Chan ◽

Clare P Grey

Keyword(s):

Crystal Structure ◽

Transition Metal ◽

Metal Oxides ◽

High Throughput ◽

Transition Metal Oxides ◽

Carbon Capture ◽

Alkaline Earth ◽

Carbon Capture And Storage ◽

Earth Metal ◽

Absorption Capacity

<div>This work describes the experimental characterisation and CO<sub>2</sub> sorption properties of several new ternary transition metal oxides predicted by high-throughput DFT screening. One material reported here, Li<sub>5</sub>SbO<sub>5</sub>, displays reversible CO<sub>2</sub> sorption, and maintains ~72% of its theoretical capacity out to 25 cycles. <br></div><div>The results in this work are used to discuss major influences on CO<sub>2</sub> absorption capacity and rate, including the role of the crystal structure, the transition metal, the alkali or alkaline earth metal, and the competing roles of thermodynamics and kinetics. </div><div>Notably, this work shows the extent and rate to which ternary metal oxides carbonate is driven primarily by the identity of the alkali or alkaline earth ion and the nature of the crystal structure, whereas the identity of the transition ion carries little influence in the systems studied here.</div>

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Investigation of exchange reactions between alkaline earth metal oxides and some transition metal halides

Journal of Thermal Analysis and Calorimetry ◽

10.1007/bf01911925 ◽

1972 ◽

Vol 4 (2) ◽

pp. 161-168 ◽

Cited By ~ 2

Author(s):

N. P. Burmistrova ◽

R. G. Fitzeva

Keyword(s):

Transition Metal ◽

Metal Oxides ◽

Alkaline Earth ◽

Earth Metal ◽

Alkaline Earth Metal ◽

Metal Halides ◽

Exchange Reactions ◽

Alkaline Earth Metal Oxides

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Basicities of alumina-supported alkaline earth metal oxides

Reaction Kinetics and Catalysis Letters ◽

10.1007/bf02475319 ◽

1998 ◽

Vol 65 (1) ◽

pp. 83-86 ◽

Cited By ~ 14

Author(s):

Yu-Wen Chen ◽

Hsueh-Ying Chen ◽

Wen-Fa Lin

Keyword(s):

Metal Oxides ◽

Alkaline Earth ◽

Earth Metal ◽

Alkaline Earth Metal ◽

Alkaline Earth Metal Oxides

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Increased hole mobility in anti-ThCr2Si2-type La2O2Bi co-sintered with alkaline earth metal oxides for oxygen intercalation and hole carrier doping

Dalton Transactions ◽

10.1039/d0dt04288a ◽

2021 ◽

Author(s):

Kota Matsumoto ◽

Hideyuki Kawasoko ◽

Noriaki Kimura ◽

Tomoteru Fukumura

Keyword(s):

Rare Earth ◽

Metal Oxides ◽

Alkaline Earth ◽

Earth Metal ◽

Hole Mobility ◽

Alkaline Earth Metal ◽

Alkaline Earth Metal Oxides ◽

Oxygen Intercalation ◽

Axis Length ◽

Carrier Doping

Metallic anti-ThCr2Si2-type RE2O2Bi (RE = rare earth) with Bi square nets show superconductivity while insulating La2O2Bi shows high hole mobility, by expanding the c-axis length through oxygen intercalation. In this...

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