Results 241 to 250 of about 54,813 (313)

The Effect of Pore Functionality in Multicomponent Covalent Organic Frameworks on Stable Long‐Term Photocatalytic H2 Production

open access: yesAdvanced Energy Materials, EarlyView.
Five COFs are synthesized through a multicomponent reaction, preserving a similar backbone while introducing varying pore functionalities. All COFs demonstrate excellent chemical stability and sustained H2 production under sunlight for 7‐15 days. The imidazole‐functionalized COF exhibits the highest H2 production, which can be attributed to its high ...
Prasenjit Das   +18 more
wiley   +1 more source

Decoding Short‐Range Order in Amorphous Two‐Dimensional Nanosheets for Efficient and Durable Ampere‐Level Seawater Electrolysis: A Case Study of Amorphous Ni(OH)2

open access: yesAdvanced Energy Materials, EarlyView.
This work uncovers the atomic‐scale origins of exceptional HER performance in amorphous Ni(OH)2 nanosheets by combining atom probe tomography, DFT simulations, and operando spectroscopy. We identify distinct short‐range‐order motifs that accelerate water dissociation, proton transport, and hydrogen adsorption. Embedding Pt single atoms further enhances
Xin Geng   +4 more
wiley   +1 more source

Safety of Sodium‐Ion Batteries: Evaluation and Perspective from Component Materials to Cells, Modules, and Packs

open access: yesAdvanced Energy Materials, EarlyView.
This review provides a bottom‐up evaluation of sodium‐ion battery safety, linking material degradation mechanisms, cell engineering parameters, and module/pack assembly. It emphasizes that understanding intrinsic material stability and establishing coordinated engineering control across hierarchical levels are vital for preventing degradation coupling ...
Won‐Gwang Lim   +5 more
wiley   +1 more source

Stable BF2 Boracycles as Versatile Reagents for Selective Ortho C–H Functionalization

open access: yesAngewandte Chemie, EarlyView.
We report a robust, metal‐free and scalable synthesis of stable BF2 boracycles via directed ortho CH borylation, delivering isolable, shelf‐stable reagents without chromatographic purification. These BF2 boracycles exhibit unique and tunable reactivity, enabling highly selective ipso‐functionalization across a broad range of transformations.
Ganesh H. Shinde   +11 more
wiley   +2 more sources

Time‐Dependent Recovery of Gastric Emptying After Gastrectomy: A 12‐Month Longitudinal Study Using a 13C‐Acetate Breath Test With a Semi‐Solid Meal

open access: yesAnnals of Gastroenterological Surgery, EarlyView.
This study examined time‐dependent changes in gastric emptying after gastrectomy for gastric cancer using a 13C‐acetate breath test with a semi‐solid meal in 95 patients, revealing that gastric emptying was initially delayed at 1 month but significantly accelerated by 12 months postoperatively.
Sachiko Kaida   +8 more
wiley   +1 more source

Modeling framework for isotopic labeling of heteronuclear moieties. [PDF]

open access: yesJ Cheminform, 2017
Borkum MI   +3 more
europepmc   +1 more source

Research note: Compound-specific isotopic analysis in 34S-labelled chicken tissues using high resolution gas chromatography/mass spectrometry

open access: gold
Julie Lalande   +6 more
openalex   +1 more source

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