Results 201 to 210 of about 201,227 (357)

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

open access: yesAdvanced Energy and Sustainability Research, EarlyView.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira   +4 more
wiley   +1 more source

M–O–C Catalysts: Copper Single Atoms Supported on Oxocarbon Covalent Networks as Electrocatalysts for Glycerol Oxidation to Formic Acid

open access: yesAngewandte Chemie, EarlyView.
We introduce a new class of single‐atom electrocatalysts based on oxygen‐coordinated metal sites embedded in oxocarbon networks (M–O–C), alternative to traditional M–N–C materials. A Cu–O–C catalyst derived from oxocarbon precursors exhibits highly dispersed Cu single atoms and delivers faster glycerol oxidation kinetics and higher formate selectivity ...
Xinyue Zheng   +9 more
wiley   +2 more sources

Mixed‐Phase TiO2 Nanotubes Enhance Ru Nanoparticle Activity for Hydrogen Evolution in pH‐Neutral Electrolytes

open access: yesAdvanced Energy and Sustainability Research, EarlyView.
Efficient water electrolysis in NaBr electrolyte is achieved using TiO2 nanotube supports decorated with Ru nanoparticles. A cooperative “job‐sharing” effect between the TiO2 proton‐storage support that provides protons to the Ru catalyst enhances hydrogen evolution, minimizes Ru demand and polarization losses, and delivers stable performance ...
Matan Sananis   +3 more
wiley   +1 more source

Modulating Li+ and Polysulfide Solvation with Low‐Density Moderately Solvating Electrolytes for Lithium–Sulfur Batteries

open access: yesAngewandte Chemie, EarlyView.
A low‐density, nonfluorinated moderately solvating electrolyte (MSE) composed of methyl tert–butyl ether concurrently tunes Li+ and polysulfide solvation, lowering desolvation barrier and mitigating polysulfide shuttling. It effectively stabilizes both electrodes and enables stable cycling of Li–S batteries under practical parameters at room ...
Tianxing Lai   +2 more
wiley   +2 more sources

Phased Array Ultrasonic Evaluation of Space Shuttle Main Engine (SSME) Nozzle Weld

open access: green, 2001
Steve James   +4 more
openalex   +1 more source

Design of a Reconfigurable Microfluidic System Enabled by Magnetic Miniature Robots

open access: yesAdvanced Intelligent Systems, EarlyView.
Magnetic miniature robots are integrated into microfluidic chips to achieve real‐time reconfiguration. By external magnetic actuation, the robots perform sorting, mixing, flow regulation, and bubble removal on demand. This versatile platform eliminates the need for complex on‐chip hardware and enables adaptive control for biological and chemical ...
Yuanhe Chen   +3 more
wiley   +1 more source

From bedside to orbit: the enduring impact of physician-astronauts over six decades of space exploration. [PDF]

open access: yesJ R Soc Med
Asrar FM   +6 more
europepmc   +1 more source

Review of Memristors for In‐Memory Computing and Spiking Neural Networks

open access: yesAdvanced Intelligent Systems, EarlyView.
Memristors uniquely enable energy‐efficient, brain‐inspired computing by acting as both memory and synaptic elements. This review highlights their physical mechanisms, integration in crossbar arrays, and role in spiking neural networks. Key challenges, including variability, relaxation, and stochastic switching, are discussed, alongside emerging ...
Mostafa Shooshtari   +2 more
wiley   +1 more source

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