Results 21 to 30 of about 8,082 (265)

A Pore or not a Pore? Understanding Pore Size Distributions of Non‐Graphitic Carbon and Atomically‐Dispersed M‐N‐C Materials

open access: yesAdvanced Science, EarlyView.
Gassorption analysis of in‐plane functionalized carbons reveals small, uniform ultramicropore signatures as potential artefacts of specific adsorption of the probe gases. Low‐pressure Langmuir fitting links these features to distinct functionalities via adsorption energies, enabling straightforward quantification of otherwise inaccessible surface‐site ...
Simon W. J. Dietzmann   +9 more
wiley   +1 more source

Impact of Electrolyte Formulation on the Phase Behavior and Interphase Formation of Sb/Graphite Electrodes for K‐Ion Batteries

open access: yesAdvanced Science, EarlyView.
Electrolyte formulation is shown to govern both interphase chemistry and bulk phase evolution in Sb/graphite anodes for potassium‐ion batteries. A diglyme‐based localized high‐concentration electrolyte promotes a thin inorganic‐rich interphase, suppresses deep graphite potassiation, limits electrode swelling, and stabilizes amorphous KxSb formation ...
Ezzoubair Bendadesse   +10 more
wiley   +1 more source

Direct observation of Néel-type skyrmions and domain walls in a ferrimagnetic DyCo3 thin film

open access: yesCommunications Physics, 2023
Isolated magnetic skyrmions are stable, topologically protected spin textures that are at the forefront of research interests today due to their potential applications in information technology.
Chen Luo   +7 more
doaj   +1 more source

Thermally Assisted Photocatalytic Dehydrogenation of Methanol in Continuous Steady‐State Operation

open access: yesAdvanced Science, EarlyView.
Thermally assisted photocatalytic methanol dehydrogenation on Pt/TiO2 enables formaldehyde and hydrogen production far beyond thermodynamic limits. Continuous operation delivers up to 95% selectivity over 70 h, and oxygen microdosing strongly boosts conversion by regenerating surface oxygen sites.
Stubenrauch Florian   +8 more
wiley   +1 more source

Reinforcing Particle Architectural Stability of Li‐Rich Cathode With Enhanced Anionic Redox Reaction Reversibility

open access: yesAngewandte Chemie, EarlyView.
In this work, we establish a direct correlation between internal compactness and particle architectural stability, identifying it as a key descriptor of cathode structural integrity. Simultaneously, the capacity contribution and compensation mechanism of ARR are resolved, revealing that the extent of irreversible capacity loss is governed by both the ...
Yizhen Huang   +24 more
wiley   +2 more sources

L’accès du plus grand nombre aux services essentiels ne se fera pas sans une implication du secteur privé et sans une tarification adéquate de ces services

open access: yesField Actions Science Reports, 2012
La couverture, via le secteur privé, des besoins en services de base (eau, énergie, services financiers, logement,..) des populations des pays en développement est une nécessité si l’on veut essayer de faire reculer la pauvreté.
Luc Rigouzzo
doaj  

Robust behavior and spin-texture stability of the topological surface state in Bi2Se3 upon deposition of gold

open access: yesnpj Quantum Materials, 2022
The Dirac point of a topological surface state (TSS) is protected against gapping by time-reversal symmetry. Conventional wisdom stipulates, therefore, that only through magnetisation may a TSS become gapped.
O. J. Clark   +4 more
doaj   +1 more source

Further Evidences for the Sulfur Spillover on Carbon: Thermodynamic Aspects and Effects on Li‐S Solid‐State Batteries

open access: yesAdvanced Science, EarlyView.
ABSTRACT This study investigates sulfur spillover, the spontaneous and rapid spread of sulfur over carbon surfaces at ambient temperature. The process is studied by small‐angle X‐ray scattering (SAXS), X‐ray radiography, and microcalorimetry from which a number of physicochemical properties are derived.
Francesco Piccolo   +9 more
wiley   +1 more source

NIELINIOWA ANALIZA SIECI ZBIERAJĄCYCH ENERGIĘ W ZAKRESIE RADIOWYM O WYSOKIM WSPÓŁCZYNNIKU DOBROCI Q

open access: yesInformatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2018
Artykuł poświęcony jest nieliniowej analizie obwodów zbierających energię o wysokim i niskim współczynniku dobroci Q, w zakresie częstotliwości radiowych. Z użyciem Keysight Advanced Design System wykonano analizę wielkosygnałową.
Christian Merz, Gerald Kupris
doaj   +1 more source

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