Articles with "valence state" as a keyword



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Self-Activated Formation of Hierarchical Co3 O4 Nanoflakes with High Valence-State Conversion Capability for Ultrahigh-Capacity Zn-Co Batteries.

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Published in 2022 at "Small"

DOI: 10.1002/smll.202107149

Abstract: Cobalt-based materials are attracting increasing interest in alkaline Zn batteries due to the high theoretical capacity. However, the practical utilization is restricted by the poor microstructure and insufficient valence-state conversion. Herein, a self-activated formation of… read more here.

Keywords: valence state; state conversion; capacity; conversion ... See more keywords
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Effect of the valence state of initial iron source on oxygen evolution activity of Fe-doped Ni-MOF

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Published in 2020 at "Chemical Papers"

DOI: 10.1007/s11696-020-01112-6

Abstract: Abstract The coordination structure of MOF is strongly influenced by central metal ions. Here, we designed and prepared iron-doped nickel metal–organic framework (Fe-doped Ni-MOF) by employing different initial iron sources (Fe 2+ , Fe 3+… read more here.

Keywords: initial iron; effect valence; iron; valence state ... See more keywords
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Effect of valence state and particle size on NO oxidation in fresh and aged Pt-based diesel oxidation catalysts

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Published in 2018 at "Applied Surface Science"

DOI: 10.1016/j.apsusc.2018.03.032

Abstract: Abstract To stabilize Pt, Magnesium-modified SiO2-Al2O3 materials was used to impregnate with Pt, which could strengthen the bonding effect between Pt and Mg. Before and after aging, both showed a higher dispersion. High valence state… read more here.

Keywords: effect; valence state; fresh aged; oxidation ... See more keywords
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Modulation of coordinative unsaturation degree and valence state for cerium-based adsorbent to boost phosphate adsorption

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Published in 2020 at "Chemical Engineering Journal"

DOI: 10.1016/j.cej.2020.124912

Abstract: Abstract The electronic structure and associated chemical characteristics of metal-based adsorbent are directly relevant to the selectivity and efficiency of phosphate uptake. However, few studies focus on the nature of metal centers’ electronic orbit (i.e.,… read more here.

Keywords: state; based adsorbent; metal; valence state ... See more keywords

Effects of liquid digestate on the valence state of vanadium in plant and soil and microbial community response.

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Published in 2020 at "Environmental pollution"

DOI: 10.1016/j.envpol.2020.114916

Abstract: Liquid digestate containing high levels of nutrients and humic and fatty acids can affect vanadium species and their plant uptake. To elucidate the effects of liquid digestate on the valence state of vanadium in soil… read more here.

Keywords: valence state; plant; vanadium; soil ... See more keywords
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Flux growth, mixed valence state and superconductivity of Sn4Sb3 intermetallic crystals

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Published in 2021 at "Intermetallics"

DOI: 10.1016/j.intermet.2021.107301

Abstract: Abstract Single crystals of Sn4Sb3 with mm size have been obtained for the first time via a Sn flux method. Structural refinements confirm its trigonal structure with the centrosymmetric R 3 m space group. The… read more here.

Keywords: growth mixed; valence; mixed valence; flux growth ... See more keywords

Comparison of multi-valent manganese oxides (Mn4+, Mn3+, and Mn2+) doping in BiFeO3-BaTiO3 piezoelectric ceramics

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Published in 2019 at "Journal of The European Ceramic Society"

DOI: 10.1016/j.jeurceramsoc.2019.07.013

Abstract: ABSTRACT Different manganese oxides-doping effects were compared in piezoceramic BiFeO3-BaTiO3 system. 0.67Bi1.05(Fe0.99Mnx0.01)O3-0.33BaTiO3 (valence state x = 4+, 3+, and 2+) ceramics were prepared via a solid-state reaction process followed by furnace-cooling (FC) or water-quenching (WQ)… read more here.

Keywords: bifeo3 batio3; valence state; mn2; manganese oxides ... See more keywords
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Site occupancy, valence state, and spin state of Co ions in Co-doped In2O3 diluted magnetic semiconductor

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Published in 2019 at "Journal of Magnetism and Magnetic Materials"

DOI: 10.1016/j.jmmm.2019.165358

Abstract: Abstract This study aims to investigate the 24 d and 8 b site occupancies, valence state, and spin state of Co ions in Co-doped In2O3 prepared by a chemical solution method. The Rietveld analysis of… read more here.

Keywords: spin state; state; valence state; state spin ... See more keywords
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Valence state and active site of CeO2-WO3 catalysts supported on CNT

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Published in 2021 at "Journal of Physics and Chemistry of Solids"

DOI: 10.1016/j.jpcs.2021.109999

Abstract: Abstract The redox properties of CeO2-WO3 mixed oxide supported on multi-walled carbon nanotubes (MWCNTs) and TiO2 were investigated in terms of valence state and active oxygen species. Ce-W/CNT and Ce-W/TiO2 were synthesized by impregnation method… read more here.

Keywords: cnt; valence state; ceo2; ceo2 wo3 ... See more keywords
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Effect of the Valence State of Iron in the Precursors on the Fischer–Tropsch Synthesis Performance of an Fe/Fe Foam Catalyst

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Published in 2021 at "Industrial & Engineering Chemistry Research"

DOI: 10.1021/acs.iecr.0c05733

Abstract: The relationship between iron precursors and Fischer–Tropsch synthesis (FTS) performance is not well understood due to the lack of evidence for the role of the iron valence state. Here, the iron pr... read more here.

Keywords: precursors fischer; iron precursors; tropsch synthesis; fischer tropsch ... See more keywords
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Doping of Cr to Regulate the Valence State of Cu and Co Contributes to Efficient Water Splitting.

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Published in 2023 at "ACS applied materials & interfaces"

DOI: 10.1021/acsami.2c18799

Abstract: Water electrolysis in alkaline media is the most promising technology for hydrogen production, but efficient electrocatalysts are required to reduce the overpotential in HER and OER processes. In this work, the multicomponent transition metal catalyst… read more here.

Keywords: regulate valence; doping regulate; water; water splitting ... See more keywords