Results 221 to 230 of about 1,812,757 (349)

Metal‐Mediated Nitrogen Doping of Carbon Supports Boosts Hydrogen Production from Ammonia

open access: yesAngewandte Chemie, EarlyView.
A virtuous catalytic cycle is established as the carbon support simultaneously tunes electron density and stores atomic nitrogen formed via Ru–N species during ammonia decomposition, resulting in self‐enhancing catalysis. Abstract Ammonia is an attractive hydrogen carrier, yet its practical use is limited by the need for efficient catalytic ...
Thomas J. Liddy   +20 more
wiley   +2 more sources

Doubting doubly labeled water. [PDF]

open access: yesProc Natl Acad Sci U S A
Uzoigwe CE.
europepmc   +1 more source

(Table 2) Stable hydrogen and carbon isotopes of C37 alkenones during Termination I and II of sediment core MD02-2594

open access: green, 2002
Sebastian Kasper   +5 more
openalex   +1 more source

Benzoyl‐Xanthenoxanthenes: Versatile Chromophores for Light‐Engaging Applications

open access: yesAngewandte Chemie, EarlyView.
Oxidatively stable benzoyl‐fused peri‐xanthenoxanthene ribbons with NIR emission were synthesized. Their good spectral overlap enabled cascaded Förster resonance energy transfer (FRET) antennae in a nematic liquid crystal phase, achieving directional energy transfer.
Cristian De Luca   +10 more
wiley   +2 more sources

Fluid inclusions: tiny windows into global paleo-environments. [PDF]

open access: yesCommun Earth Environ
Bekaert DV, Avice G, Marty B.
europepmc   +1 more source

Dispersion‐Enhanced Nitrogen‐Centered Photocatalysis of the Direct Hydrogen Atom Transfer

open access: yesAngewandte Chemie, EarlyView.
Nitrogen‐centered acridine photocatalysts for direct hydrogen atom transfer have been developed, leveraging dispersion interactions to enhance photocatalytic activity. This approach enables diverse functionalization reactions of strong C─H bonds even under cryogenic conditions and provides a new strategy for boosting the efficiency of direct HAT ...
Jiasong Zhang   +16 more
wiley   +1 more source

Dual Chemical Looping/Catalytic Process for Alkylation of Benzene With Ethane and Propane Yielding Ethylbenzene and Cumene Over Copper‐Containing Mordenite

open access: yesAngewandte Chemie, EarlyView.
We report a dual chemical looping/catalytic process coupling alkane dehydrogenation with aromatic alkylation over Cu‐mordenite, yielding up to 25% alkylated aromatics with >95% selectivity per cycle. In situ NMR, FTIR spectroscopy, and DFT show alkylation proceeds via a π‐bound Cu(I)–olefin intermediate and Brønsted acid sites.
Florent J. Dubray   +7 more
wiley   +2 more sources

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