A High‐Entropy Engineering on Layered Double Hydroxide Electrocatalyst with Electronic Structure Reconstruction for Ammonia Synthesis DOI

Xuan‐Wen Gao,

Sirui Li,

Tian-Zhen Ren

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: June 1, 2025

Abstract High‐entropy electrocatalysts have garnered an increasing attention in electrocatalytic applications due to their outstanding redox reaction capabilities, as well selective and stable properties. The deliberate design of high‐entropy materials with high metallic vacancy concentrations intrinsic strain features induced localized empty electronic state charge redistribution at the bandgap level. A Al/Zn‐etched FeCoNiAlZnCu layered double hydroxide achieves a maximum ammonia Faradaic efficiency 98.57% −0.5 V production rate 40.34 mg h −1 cm −2 for nitrate reduction reaction. Furthermore, it exhibits favorable oxygen evolution activity overpotential 300 mV 10 mA Tafel slope 92.5 dec . Combined advanced spectroscopic techniques, reveals that local defects can modulate catalytic active sites by stimulating electron accumulation creating unsaturated coordination around sites. synergistic interaction between internal rearrangement enhance sites, thus reducing absorbed energy barrier, boosting transfer kinetics, stabilized structure.

Language: Английский

Regulating Ion Transfer Dynamics and Potassium Polyselenide Dissolution in Dual‐Defect MoSe2‐x@NC for Ultrafast and Stable Potassium‐Ion Storage DOI Open Access

Zhijiao Huang,

Gaoyu Wang,

S Xie

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

Abstract Molybdenum diselenide (MoSe 2 ), a promising anode material for potassium‐ion batteries (KIBs), often suffers from sluggish kinetics, substantial volumetric expansion, and dissolution shuttling of intermediate phases, resulting in unsatisfactory cycle stability rate performance. In this work, dual‐defect MoSe (equipped with interlayer defects Se vacancies) is introduced by novel plasma‐induced etching process, encapsulated nitrogen‐doped porous carbon nanofibers (denoted as dd‐MoSe 2‐ x @NC). These modifications create multidimensional insertion channels, improve ion transfer dynamics, enhance intrinsic conductivity, expose more reactive sites. Moreover, the matrix mitigates expansion suppresses potassium‐polyselenide (K‐pSe ) through physicochemical dual‐anchoring strategy. The @NC electrode demonstrates remarkable electrochemical performance, achieving high specific capacity 418.5 mAh g −1 at 0.05 A , reliable cycling over 1400 cycles 2.0 superior performance 125.0 10.0 . findings elucidate “intercalation‐conversion” reaction mechanism show that @NC//PTCDA full cell attains energy density (115.8 W h kg power (1057.2 ). This work highlights enhanced potassium storage kinetics layered transition metal chalcogenides, demonstrating potential high‐performance KIBs.

Language: Английский

Citations

0
Plasma-Enhanced Vacancy Engineering for Sustainable High-Performance Recycled Silicon in Lithium-Ion Batteries DOI Creative Commons
Dingyi Zhang, Hong Gao, Jiayi Li

et al.

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104231 - 104231

Published: April 1, 2025

Language: Английский

Citations

0
Regulation of Coordinated Oxygen Species‐Dominated Mechanochemical Degradation to Stabilize Sodium Iron Hexacyanoferrate Cathode for Sodium‐Ion Batteries DOI

Xianhai Bai,

Zihan Zhang, Tao Jin

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Abstract The surface coordination environment of sodium iron hexacyanoferrate (FeHCF) cathode is crucial for ensuring its lifespan in sodium‐ion batteries (SIBs). This investigation delves into the impacts coordinated oxygen species on performance FeHCF cathode. It demonstrated that alter electron structure around Fe 2+ exposed at vacancies during cycling, resulting spatial heterogeneity reactive concentration and promoting disordered proliferation electrolyte interface (CEI). Simultaneously, electronic coupling between high spin (HS‐Fe ) weakens strength nearby chemical bonds exacerbates deformation Fe─N Na⁺ ion migration, thereby increasing fracture sensitivity under stress. adverse synergistic interaction leads to collapse prior degradation internal framework. Herein, Na 4 Fe(CN) 6 ∙10H 2 O additive used regulate cathodes, achieving an initial capacity 91.6 mAh g −1 with excellent retention 83.5% after 2000 cycles 1 C. These research findings elucidate predominance mechanism battery provide critical insights developing durable cathodes SIBs.

Language: Английский

Citations

0
Interfacial electric field Intensification through Defect-Tuned work function engineering for advanced aluminum batteries DOI
Han Wang, Yanli Wang, Quan Ye

et al.

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 696, P. 137894 - 137894

Published: May 14, 2025

Language: Английский

Citations

0
MoSe2 hybrid superlattice with expanded interlayer spacing and enriched 1T phase for aqueous zinc ion batteries DOI
Jianing Yang,

Tian Han,

Shang‐Qi Li

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 164105 - 164105

Published: May 1, 2025

Language: Английский

Citations

0
A High‐Entropy Engineering on Layered Double Hydroxide Electrocatalyst with Electronic Structure Reconstruction for Ammonia Synthesis DOI

Xuan‐Wen Gao,

Sirui Li,

Tian-Zhen Ren

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: June 1, 2025

Abstract High‐entropy electrocatalysts have garnered an increasing attention in electrocatalytic applications due to their outstanding redox reaction capabilities, as well selective and stable properties. The deliberate design of high‐entropy materials with high metallic vacancy concentrations intrinsic strain features induced localized empty electronic state charge redistribution at the bandgap level. A Al/Zn‐etched FeCoNiAlZnCu layered double hydroxide achieves a maximum ammonia Faradaic efficiency 98.57% −0.5 V production rate 40.34 mg h −1 cm −2 for nitrate reduction reaction. Furthermore, it exhibits favorable oxygen evolution activity overpotential 300 mV 10 mA Tafel slope 92.5 dec . Combined advanced spectroscopic techniques, reveals that local defects can modulate catalytic active sites by stimulating electron accumulation creating unsaturated coordination around sites. synergistic interaction between internal rearrangement enhance sites, thus reducing absorbed energy barrier, boosting transfer kinetics, stabilized structure.

Language: Английский

Citations

0