FlatChem, Journal Year: 2025, Volume and Issue: unknown, P. 100840 - 100840
Published: Feb. 1, 2025
Language: Английский
Small, Journal Year: 2025, Volume and Issue: unknown
Published: March 16, 2025
Abstract In the context of energy conversion, design and synthesis high‐performance metal‐free carbon electrocatalysts for oxygen reduction reaction (ORR) is crucial. Herein, a one‐step nitrogen doping/extraction strategy proposed to fabricate 3D nitrogen‐doped aerogels (NCA‐Cl) with rich pentagonal topological defects. The NCA‐Cl electrocatalyst exhibits superb ORR activity, displaying half‐wave potential 0.89 V vs RHE 0.74 under alkaline (0.1 m KOH) acidic HClO 4 ) media, respectively, thanks balanced * OOH intermediate adsorption desorption induced by defects dopants. aqueous zinc‐air battery (ZAB) equipped cathode delivers peak power density 206.6 mW cm −2 , specific capacity 810.6 mAh g −1 durability 400 h, flexible ZAB also performed convincingly. This work provides an effective formation enhancement electrocatalytic activity carbon‐based catalysts.
Language: Английский
Citations
1
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: March 7, 2025
Metal–nitrogen-carbon (M–N-C) single-atom catalysts (SACs) have been widely applied in catalyzing electrochemical redox reactions. However, their long-term catalytic stabilities greatly limit practical applications. This work investigates the dynamic evolution of two model Cu–N–C SACs with different Cu–N coordinations, namely Cu1/Npyri-C and Cu1/Npyrr-C, CO reduction reaction (CORR), based on a collection situ characterizations including attenuated total reflectance surface-enhanced infrared absorption spectroscopy, X-ray quasi-in electron paramagnetic resonance spectroscopy ultraviolet–visible complemented by theoretical calculations. Our findings reveal that Cu nanoparticle formation rate over Cu1/Npyrr-C is more than 6 times higher during CORR. Quasi-in UV–vis measurements demonstrate hydrogen radicals can be produced CORR, which will attack bonds SACs, causing leaching Cu2+ followed subsequent to form nanoparticles. Kinetic calculations show displays better stability resulting from stronger Cu–Npyri bonds. study deepens understanding deactivation mechanism reactions provides guidance for design next-generation enhanced durability.
Language: Английский
Citations
0
Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)
Published: March 31, 2025
Abstract Thermoelectric technology that utilizes thermodynamic effects to convert thermal energy into electrical has greatly expanded wearable health monitoring, personalized detecting, and communicating applications. Encouragingly, thermoelectric assisted by artificial intelligence exerts great development potential in electronic devices rely on the self-sustainable operation of human body heat. Ionic (i-TE) possess high Seebeck coefficients a constant stable output are expected achieve an effective conversation harvesting. Herein, we developed i-TE paster for chargeable storage, temperature-triggered material recognition, contact/non-contact temperature detection, photo conversion An all-solid-state organic ionic gel electrolyte (PVDF-HFP-PEO gel) with onion epidermal cells-like structure was sandwiched between two electrodes, which take full advantage synergy Soret effect polymer expansion effect, thus achieving enhanced ZT value up 900% compared PEO-free electrolyte. The device delivers coefficient 28 mV K −1 , maximum efficiency 1.3% performance, ultra-thin skin-attachable properties wearability, demonstrate application prospect electronics.
Language: Английский
Citations
0
FlatChem, Journal Year: 2025, Volume and Issue: unknown, P. 100840 - 100840
Published: Feb. 1, 2025
Language: Английский
Citations
0