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Separating nanobubble nucleation for transfer-resistance-free electrocatalysis.
Nat Commun
January 2025
School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore.
Electrocatalytic gas-evolving reactions often result in bubble-covered surfaces, impeding the mass transfer to active sites. Such an issue will be worsened in practical high-current-density conditions and can cause sudden cell failure. Herein, we develop an on-chip microcell-based total-internal-reflection-fluorescence-microscopy to enable operando imaging of bubbles at sub-50 nm and dynamic probing of their nucleation during hydrogen evolution reaction.
View Article and Find Full Text PDFDestabilization of Single-Atom Catalysts: Characterization, Mechanisms, and Regeneration Strategies.
Adv Mater
January 2025
Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.
Numerous in situ characterization studies have focused on revealing the catalytic mechanisms of single-atom catalysts (SACs), providing a theoretical basis for their rational design. Although research is relatively limited, the stability of SACs under long-term operating conditions is equally important and a prerequisite for their real-world energy applications, such as fuel cells and water electrolyzers. Recently, there has been a rise in in situ characterization studies on the destabilization and regeneration of SACs; however, timely and comprehensive summaries that provide the catalysis community with valuable insights and research directions are still lacking.
View Article and Find Full Text PDFA Game Model and Fault Recovery Algorithm for SDN Multi-Domain.
Sensors (Basel)
December 2024
The College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
Software-defined networking (SDN) offers an effective solution for flexible management of Wireless Sensor Networks (WSNs) by separating control logic from sensor nodes. This paper tackles the challenge of timely recovery from SDN controller failures and proposes a game theoretic model for multi-domain controllers. A game-enhanced autonomous fault recovery algorithm for SDN controllers is proposed, which boasts fast fault recovery and low migration costs.
View Article and Find Full Text PDFDesign, Analysis, and Testing of a Type V Composite Pressure Vessel for Hydrogen Storage.
Polymers (Basel)
December 2024
Adamant Composites Ltd., Agias Lavras & Stadiou, 26504 Patras, Greece.
Hydrogen, as a zero-emission fuel, produces only water when used in fuel cells, making it a vital contributor to reducing greenhouse gas emissions across industries like transportation, energy, and manufacturing. Efficient hydrogen storage requires lightweight, high-strength vessels capable of withstanding high pressures to ensure the safe and reliable delivery of clean energy for various applications. Type V composite pressure vessels (CPVs) have emerged as a preferred solution due to their superior properties, thus this study aims to predict the performance of a Type V CPV by developing its numerical model and calculating numerical burst pressure (NBP).
View Article and Find Full Text PDFDamage and Failure Monitoring of Aerospace Insulation Layers Based on Embedded Fiber Bragg Grating Sensors.
Polymers (Basel)
December 2024
Research Institute of Aero-Engine, Beijing University of Aeronautics and Astronautics, Beijing 102206, China.
Carbon fiber-reinforced polymer (CFRP) composites are widely used in aviation thermal insulation layers due to their high strength-to-weight ratio and excellent high-temperature performance. However, challenges remain regarding their structural integrity and durability under extreme conditions. This study first employed finite element simulation to model the damage evolution of CFRP laminated plates under axial tensile loads and their thermal decomposition behavior in high-temperature environments, providing a theoretical reference.
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