Agenparl

oxygen

Agenparl English Educazione Scienza e Tecnologia Social Network

HETEROJUNCTION INDUCTED NICKEL-BASED OXYGEN VACANCIES ON N-ENRICHED POROUS CARBONS FOR ENHANCED ALKALINE HYDROGEN OXIDATION AND OXYGEN REDUCTION

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), mer 20 gennaio 2021 In attempt to boost the commercialization of hydrogen fuel cells with hydroxide-exchange membrane, a cost-efficient Ni/NiO/N-doped porous carbon (NC) catalyst with sufficient Ni/NiO heterojunction was fabricated by fine calcinating Ni-based metal-organic framework precursor. This in-situ carbonization not only promotes the development......
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ZIF-DERIVED “SENBEI”-LIKE CO9S8/CEO2/CO HETEROSTRUCTURAL NITROGEN-DOPED CARBON NANOSHEETS AS BIFUNCTIONAL OXYGEN ELECTROCATALYST FOR ZN-AIR BATTERIES

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), mer 20 gennaio 2021 Rational design and construction of efficient and robust non-noble metal bifunctional oxygen electrocatalysts is of critical significance, due to the given attention for reversible metal-air batteries. In this paper, we reported a novel two-dimensional “senbei”-like Co9S8/CeO2/Co-NC nitrogen-doped carbon nanosheets (Co9S8/CeO2/Co-NC) derived......
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THE OXA-MICHAEL REACTION IN THE SYNTHESIS OF 5- AND 6-MEMBERED OXYGEN-CONTAINING HETEROCYCLES

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), mar 19 gennaio 2021 The oxa-Michael reaction (OMR) offers the most effective and straightforward route to the synthesis of wide range of 5- and 6-membered oxygen-containing heterocycles including tetrahydropyrans, tetrahydrofurans, 1,4 dioxanes, isoxazolidines, isoxazolines, γ-lactones and related γ-butenolides. These molecular frameworks are common structural motifs......
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NEW MRI ALGORITHM PROVIDES NOVEL INSIGHT ABOUT PLACENTAL BLOOD FLOW IN LATE PREGNANCY AND STILLBIRTH RISK

Redazione
(AGENPARL) – LONDON (UK), sab 16 gennaio 2021 The paper, which was published in the Journal of Physiology, was co-authored by researchers from King’s College London, University College London (UCL) and the University of Auckland. It shows that when women lie on their backs, there is an average 6.2% decline......
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KINETICS OF COMPETING EXCHANGE OF OXYGEN AND WATER AT THE SURFACE OF FUNCTIONAL OXIDES

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), ven 15 gennaio 2021 The presence of water vapour in the input gas stream influences the performance of air electrodes of Solid Oxide Cells. In this work, the oxygen transport kinetics were determined by Isotopic Exchange Depth Profiling at 350˚C on polycrystalline La0.6Sr0.4Co0.2Fe0.8O3-δ samples in......
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RECENT ADVANCES OF HIERARCHICALLY POROUS BIFUNCTIONAL OXYGEN ELECTROCATALYSTS DERIVED FROM METAL-ORGANIC FRAMEWORKS FOR ZN-AIR BATTERIES

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), mer 13 gennaio 2021 On account of fossil energy depletion and environmental crisis, Zn-air battery with high energy density, eco-friendliness, and excellent safety has been considered as a promising candidate for next-generation energy devices. The crucially important air cathode of Zn-air battery requires gas-involving oxygen......
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SYNTHESIS OF NOVEL π-EXTENDED D–A–D-TYPE DIPYRIDO[3,2-A:2’,3’-C]PHENAZINE DERIVATIVES AND THEIR PHOTOSENSITIZED SINGLET OXYGEN GENERATION

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), mar 12 gennaio 2021 Electron donor–acceptor–donor (D–A–D) π-conjugated molecules based on dipyrido[3,2-a:2’,3’-c]phenazine (dppz) were developed as photosensitizers for singlet oxygen generation. These dppz derivatives showed electronic absorption assigned to an intramolecular charge transfer transition in the red region at a wavelength of around 600 nm.......
Agenparl English Educazione Scienza e Tecnologia Social Network

REDOX-COUPLE INVESTIGATIONS IN SI-DOPED LI-RICH CATHODE MATERIALS

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), sab 09 gennaio 2021 In this investigation, the improved electrochemical behavior in Si-doped Li-rich cathodes is studied with scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS). Z-contrast images show a layered structure that develops a thin, spinel-like surface layer after the first......
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COOX ELECTRO-CATALYSTS ANCHORED ON NITROGEN-DOPED CARBON NANOTUBES FOR THE OXYGEN EVOLUTION REACTION

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), gio 07 gennaio 2021 The development of high-performance, low-cost transition metal oxide nanoparticle-supported carbon catalysts for the oxygen evolution reaction (OER) is one of the biggest challenges faced in the process of commercializing water electrolyzers and rechargeable metal–air batteries. Cobalt oxides (CoOx) have been explored......
Agenparl English Educazione Scienza e Tecnologia Social Network

SUSTAINABLE, SELF-CLEANING, TRANSPARENT, AND MOISTURE/OXYGEN-BARRIER COATING FILM FOR FOOD PACKAGING

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), gio 07 gennaio 2021 Plastic packaging effectively protects food from mechanical, microbial, and chemical damage; however, oxygen and moisture permeate these plastics and spoil the food. Thus, the gas barrier function is usually imparted through metallic or halogenated polymeric coatings. However, the former blocks visible......

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