Chemical Science, Journal Year: 2024, Volume and Issue: 15(38), P. 15737 - 15744
Published: Jan. 1, 2024
We realized the confined assembly of uranyl within single-walled carbon nanotubes and unveiled directional growth reconstruction U 4 O 9 nanorods in nanochannels enabled by situ transmission electron microscopy e-beam stimulation.
Language: Английский
Small, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 10, 2025
Abstract The design and fabrication of nanocatalysts with high accessibility sintering resistance remain significant challenges in heterogeneous electrocatalysis. Herein, a novel catalyst is introduced that combines electronic pumping alloy crystal facet engineering. At the nanoscale, pump leverages chemical potential difference to drive electron migration from one region another, separating transferring electron‐hole pairs. This mechanism accelerates reaction kinetics improves rate. interface structure optimization enables CoFe/carbon nanotube (CNT) exhibit outstanding oxygen reduction (ORR) evolution (OER) performance. Specifically, this achieves an ORR half‐wave (E₁/₂) 0.895 V, outperforming standard Pt/C RuO₂ electrocatalysts terms both specific activity stability. It also demonstrates excellent electrochemical performance for OER, overpotential only 287 mV at current density 10 mA cm⁻ 2 . Theoretical calculations reveal carefully designed facets reduce energy barrier rate‐determining steps optimizing O₂ adsorption promoting capture process. study highlights developing cost‐effective bifunctional ORR–OER electrocatalysts, offering promising strategy advancing Zn–air battery technology.
Language: Английский
Citations
4
Journal of Materials Science, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 15, 2025
Abstract As the demand for sustainable energy solutions grows, developing efficient conversion and storage technologies, such as fuel cells metal-air batteries, is vital. Oxygen Reduction Reaction (ORR) a significant limitation in electrochemical systems due to its slower kinetics. Although Pt-based catalysts are commonly used address this challenge, their high cost suboptimal performance remain obstacles further development. This review offers comprehensive overview of advanced support materials aimed at improving efficiency, durability, cost-effectiveness catalysts. By examining range materials, including mesoporous carbon, graphene, carbon nanotubes, metal oxides, clarifies relationship between structural properties these supports influence on ORR performance. Additionally, it discusses fundamental characteristics practical applications cells, explores potential future directions optimizing advance technologies. Future research could focus nano-engineering composite material development unlock full catalysts, significantly enhancing economic viability applications.
Language: Английский
Citations
2
Nano Energy, Journal Year: 2024, Volume and Issue: 131, P. 110216 - 110216
Published: Sept. 6, 2024
Language: Английский
Citations
11
Batteries, Journal Year: 2025, Volume and Issue: 11(2), P. 60 - 60
Published: Feb. 5, 2025
Hybrid supercapacitors (HSCs) have garnered growing interest for their ability to combine the high energy storage capability of batteries with rapid charge–discharge characteristics supercapacitors. This review examines evolution HSCs, emphasizing synergistic mechanisms that integrate both Faradaic and non-Faradaic charge processes. Transition metal oxides (TMOs) are highlighted as promising battery-type electrodes owing notable potential compatibility various synthesis routes, including hydro/solvothermal methods, electrospinning, electrodeposition, sol–gel Particular attention is directed toward Ti-, Co-, V-based TMOs, a focus on tailoring properties through morphology control, composite formation, doping enhance electrochemical performance. Overall, discussion underscores HSCs meet demand next-generation systems by bridging gap between power requirements.
Language: Английский
Citations
1
Chem Catalysis, Journal Year: 2024, Volume and Issue: 4(11), P. 101091 - 101091
Published: Sept. 3, 2024
Language: Английский
Citations
8
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 14, 2024
Abstract Electrocatalytic water splitting is long constrained by the sluggish kinetics of anodic oxygen evolution reaction (OER), and rational spin‐state manipulation holds great promise to break through this bottleneck. Low‐spin Fe 3+ (LS, t 2g 5 e g 0 ) species are identified as highly active sites for OER in theory, whereas it still a formidable challenge construct experimentally. Herein, new strategy demonstrated effective construction LS NiFe‐layered double hydroxide (NiFe‐LDH) introducing multiple defects, which induce coordination unsaturation over thus enlarge their d orbital energy. The as‐obtained catalyst exhibits extraordinary performance with an ultra‐low overpotential 244 mV at industrially required current density 500 mA cm −2 , 110 lower than that conventional NiFe‐LDH high‐spin (HS, 3 2 superior most previously reported NiFe‐based catalysts. Comprehensive experimental theoretical studies reveal configuration effectively reduces adsorption strength O* intermediate compared HS case, thereby altering rate‐determining step from (O* → OOH*) (OH* O*) lowering its energy barrier. This work paves avenue developing efficient spin‐dependent electrocatalysts beyond.
Language: Английский
Citations
7
Small, Journal Year: 2024, Volume and Issue: 20(45)
Published: July 29, 2024
In light of the intensifying global energy crisis and mounting demand for environmental protection, it is vital importance to develop advanced hydrogen conversion systems. Electrolysis cells production fuel cell devices utilization are indispensable in conversion. As one electrolysis cells, water splitting involves two electrochemical reactions, evolution reaction oxygen reaction. And reduction coupled with oxidation reaction, represent core electrocatalytic reactions devices. However, inherent complexity lack a clear understanding structure-performance relationship these have posed significant challenges advancement research this field. work, recent development revealing mechanism systems reviewed, including situ characterization theoretical calculation. First, working principles applications operando measurements unveiling systematically introduced. Then application calculations design catalysts investigation discussed. Furthermore, opportunities also summarized discussed paving
Language: Английский
Citations
5
Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 363, P. 124821 - 124821
Published: Nov. 12, 2024
Language: Английский
Citations
5
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 157514 - 157514
Published: Nov. 1, 2024
Language: Английский
Citations
4
ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 566 - 575
Published: Jan. 13, 2025
The rational design and construction of S-scheme heterojunctions represent an effective strategy for enhancing the photocatalytic efficiency. Nevertheless, challenge enabling efficient charge migration at interface persists. Herein, a 0D/2D heterojunction photocatalyst incorporating 0D Ag quantum dots S-vacancy-modified Bi2S3 with 2D MnFe2O4 ultrathin nanosheets (AgQDs/BQDs-SV/MFO) is designed constructed via photoinduced decomposition-defect engineering strategy. Theoretical calculations experimental results demonstrate presence dots, S vacancies, nanosheet structure in AgQDs/BQDs-SV/MFO significantly improves light harvesting, separation, transfer dramatically, resulting high-efficiency degradation rate (99.5%) toward Cr(VI) under visible irradiation (λ ≥ 420 nm) 30 min excellent stability. This work provides new insights constructing photocatalysts purifying Cr wastewater environmental remediation.
Language: Английский
Citations
0