Regulating d-p band center with selenium vacancy in iron diselenide nanoarrays towards sulfion-assisted seawater electrolysis for chlorine-free hydrogen production

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 684, P. 367 - 376

Published: Jan. 8, 2025

Language: Английский

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Enhancing Efficiency and Durability of Alkaline Zn‐Co/Air Hybrid Batteries with Self‐Reconstructed Co/Co₂P Heterojunctions

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 29, 2024

Abstract Zn‐Co/air hybrid batteries showcase enhanced energy efficiency, power density, and stability compared to Zn‐air batteries. Nevertheless, it remains challenging fabricate multi‐functional cathode materials with fast reaction kinetics. Herein the synthesis of a wheat‐like composed “cereal‐grains” densely arranged Co/Co 2 P heterostructures grown on “central stems” P/N codoped carbon nanofibers (denoted as P@PNCF) is presented. The biomimetic nanostructures not only offer abundant exposed active sites maximize accessibility but also establish efficient multi‐channel networks for both electron transfer O /OH − diffusion. Furthermore, species high‐valent Co, resulting from self‐reconstruction heterojunction during first cycle, create Co 2+ ↔ 4+ redox pairs provide additional charging‐discharging voltage plateaus. In situ Raman spectroscopy measurement combined ex X‐ray diffraction evidence supports reversible process 3+/4+ x (OH) y K 2+/3+ , leading improved efficiency durability battery. As result, battery based P@PNCF exhibits remarkable density (321 mW cm −2 ), ultralong cycle (700 h), large (62% at 20 mA ).

Language: Английский

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Recent Advances of High-entropy Materials as Electrocatalysts for Rechargeable Zn-Air Batteries

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: 1011, P. 178435 - 178435

Published: Jan. 1, 2025

Language: Английский

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Anion Doping Synergistic Strategy Achieving Multi‐Interfaces and Modulated Dielectric Coupling for Efficient Electromagnetic Response

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Abstract Efficient microwave absorbers are needed to address the electromagnetic pollution caused by proliferation of new radio technologies and equipment. Excellent absorption performance can be achieved controlling dielectric constant. Heteroatom‐doped bimetallic materials promising wave (EMA) due their tunable structures low cost. In particular, presence anionic sites significantly affects constant electrical conductivity. Herein, a 1D carbon nanofiber material is prepared encapsulating FeCo nanoparticles in fiber cavity electrostatic spinning. Subsequently, tellurization, vulcanization, selenization processes carried out. FeTe 2 / CoTe @C exhibits stronger conductivity loss lower electronegativity Te. The clever configuration , C heterostructures obtained Te doping generates multi‐heterogeneous interfaces that facilitate charge migration enhance interfacial polarization, obtaining excellent EMA performance. /CoTe an optimum minimum reflection (RL min ) −51.1 dB with matching thickness 2.0 mm, effective bandwidth (EAB) reaches 4.2 GHz. Radar cross‐section (RCS) calculations show great potential for practical military stealth technology. This study offers novel guidance improving properties transition metal matrix composites via coordination modulation.

Language: Английский

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Dual electric field effects boost bifunctional oxygen electrocatalysis

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156285 - 156285

Published: Sept. 1, 2024

Language: Английский

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Diluting the Electric Supply of Surface Selenium Species to Realize Enhanced Hydrogen Monitoring in Agriculture

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 30, 2024

Abstract Electron state of catalyst surface is crucial to optimize the adsorption/intermediate gas molecules during sensing reaction. Herein, we develop an electron‐dilution strategy by introducing Pd/Pt species into semiconductor ZnSe construct electron‐deficient Se surface, exhibiting excellent H 2 performances. It found that different metal doping can induce remarkable electric environment changes atoms. For example, compared with Pd, Pt display stronger electronic dilution ability adjacent X‐ray photoelectron spectroscopy (XPS) characterizations further prove will generation sites, appearing a new and high binding energy state. Furthermore, density functional theory (DFT) calculations show deficient sites on Pt‐ZnSe could reduce level anti‐bonding orbital filling, thus enhancing stability Se‐Hads bond strengthening adsorption. As result, based micro‐electromechanical systems (MEMS) sensors exhibit response value 3.22 10 ppm at low operation temperature 145 °C. Inserting MEMS array multifunctional wireless device, it realize real‐time /temperature/humidity monitoring cloud data transmission for hydrogen agriculture production, preserving storing crop.

Language: Английский

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Strategic modulation of CoFe sites for advanced bifunctional oxygen electrocatalyst

Chinese Journal of Structural Chemistry, Journal Year: 2024, Volume and Issue: unknown, P. 100470 - 100470

Published: Nov. 1, 2024

Language: Английский

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