Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 693, P. 137595 - 137595
Published: April 14, 2025
Language: Английский
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 25, 2025
The development of highly active and stable cathodes in alkaline solutions is crucial for promoting the commercialization anion exchange membrane (AEM) electrolyzers, yet it remains a significant challenge. Herein, we synthesized atomically dispersed CoP4 moieties (CoP4–SSC) immobilized on ultrathin carbon nanosheets via phosphidation exfoliation strategy at medium temperature. thermodynamic formation process Co–P was elucidated using X-ray absorption spectroscopy (XAS) theoretical calculations. Remarkably, resulting CoP4–SSC electrocatalyst exhibited outstanding activity hydrogen evolution, with low overpotential 52 mV 10 mA cm–2 turnover frequency up to 23.83 s–1. Moreover, AEM electrolyzer fabricated achieved current density 1 A under an applied voltage only 1.94 V, showing negligible degradation after 500 h continuous electrocatalysis. series operando characterizations functional theory calculations revealed that formed nanointerface [P-*H···H2O*-Co], which facilitates water dissociation during Volmer–Heyrovsky pathway.
Language: Английский
Citations
5
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 3, 2025
The controlled formation of a functional adlayer at the catalyst-water interface is highly challenging yet potentially powerful strategy to accelerate proton transfer and deprotonation for ultimately improving performance proton-exchange membrane water electrolysis (PEMWE). In this study, synthesis robust vinylene-linked covalent organic frameworks (COFs) possessing high conductivities reported, which are subsequently hybridized with ruthenium dioxide yielding high-performance anodic catalysts acidic oxygen evolution reaction (OER). situ spectroscopic measurements corroborated by theoretical calculations reveal that assembled hydrogen bonds formed between COFs adsorbed oxo-intermediates effectively orient interfacial molecules, stabilizing transition states intermediate OER. This determines decrease in energy barriers deprotonation, resulting exceptional OER performance. When integrated into PEMWE device, system achieves record current density 1.0 A cm-2 only 1.54 V cell voltage, long-term stability exceeding 180 h industrial-level 200 mA cm-2. approach relying on self-assembly an oriented hydrogen-bonded highlights disruptive potential customizable structures multifunctional sites advancing technologies.
Language: Английский
Citations
3
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(47)
Published: Aug. 23, 2024
Abstract Although the electronic state of catalysts is strongly corrected with their oxygen evolution reaction (OER) performances, understanding role spin in dynamic structure during OER process still challenging. Herein, we developed a regulation strategy to boost performance CoOOH through elemental doping (CoMOOH, M=V, Cr, Mn, Co and Cu). Experimental results including magnetic characterization, situ X‐ray absorption spectroscopy, Raman density functional theory calculations unveil that Mn could successfully increase sites from low intermediate state, leading largest lattice distortion smallest energy gap between d xy z 2 orbitals among obtained CoMOOH electrocatalysts. Benefiting promoted electron transfer orbital, facilitated formation active high‐valent *O−Co (IV) species at applied potential, reduced barrier rate‐determining step, CoMnOOH exhibits highest performance. Our work provides significant insight into correction by metal oxyhydroxides, paving new avenue for rational design high‐activity
Language: Английский
Citations
10
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 7, 2025
Abstract Covalent organic frameworks (COFs) hold great promise as cathode materials for lithium‐ion batteries (LIBs), but their limited conductivity has hindered broader application. In this study, a novel metallosalen COF (Cu‐TH‐COF) is introduced, synthesized via one‐pot method, incorporating redox‐active Cu ions into N 2 O pockets and creating an extended π‐d conjugated structure. This design merges inorganic active sites, enabling efficient multi‐electron transfer improving the utilization of sites in LIBs. The conjugation significantly enhances electronic conductivity, resulting improved rate performance. As result, Cu‐TH‐COF delivers impressive discharge capacity 300 mAh g −1 at 50 mA retains 174 4000 , outperforming its Cu‐free counterpart. study demonstrates first time potential COFs high‐performance opens up new strategy next‐generation
Language: Английский
Citations
2
Advanced Materials Interfaces, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 25, 2025
Abstract This review highlights recent advancements in enhancing oxygen evolution reaction kinetics through the design of single‐atom catalysts. By leveraging unique properties catalysts (SACs), including high atom utilization and tunable electronic structures, researchers have developed with superior activity stability for (OER). Key strategies SACs design, such as support selection, coordination environment, doping effects are discussed, while also examining role advanced characterization techniques elucidating catalytic mechanisms. Finally, future directions challenges field outlined to guide development next‐generation OER
Language: Английский
Citations
2
Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 26, 2025
Abstract Achieving close integration and strong electronic communication between molecular catalysts conductive substrates is crucial for developing the stability catalytic activity of nanomaterials. However, constructing heterostructure catalyst usually need complex demanding synthesis processes. Herein, a facile universal “molecular nanojunction” strategy developed to prepare with high by improving coplanarity nanojunction facilitating efficient electron transfer. The density function theory (DFT) calculations in situ characterization indicate that reduces excessive * OH adsorption accelerates deprotonation process, thereby promoting oxygen generation. shows better evolution reaction (OER) performance than most reported catalysts. What's more, are applied alkaline anion exchange membrane (AEM) electrolysis cells, exhibiting excellent performance.
Language: Английский
Citations
1
ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown
Published: March 26, 2025
Proton exchange membrane (PEM) water electrolyzers are one type of the most promising technologies for efficient, nonpolluting and sustainable production high-purity hydrogen. The anode catalysts account a very large fraction cost in PEM electrolyzer also determine lifetime electrolyzer. To date, Ir- Ru-based materials types acidic oxygen evolution reaction (OER), but they still face challenges high or low stability. Hence, exploring Ir stable electrocatalysts OER attracts extensive research interest recent years. Owing to these great efforts, significant developments have been achieved this field. In review, field comprehensively described. possible mechanisms first presented, followed by introduction criteria evaluation electrocatalysts. development then elucidated according strategies utilized tune catalytic performances. Lastly, future burgeoning is discussed.
Language: Английский
Citations
1
Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)
Published: April 8, 2025
Electrocatalytic oxygen evolution reaction (OER) is key to several energy technologies but suffers from low activity. Leveraging the lattice activation mechanism (LOM) a strategy for boosting its However, this approach faces significant thermodynamic challenges, requiring high-valent oxidation of metal ions without compromising their stability. We reveal that high-entropy alloys (HEAs) can efficiently activate LOM through synergistic multi-path electron transfer. Specifically, nickel enhanced by transfer, aided integration weaker Co-O bonds, enabling effective at Ni-Co dual-site. These insights allow design NiFeCoCrW0.2 HEA exhibits improved activity, achieving an overpotential 220 mV current density 10 mA cm-2. It also demonstrates good stability, maintaining potential with less than 5% variation over 90 days 100 cm-2 density. This study sheds light on effects confer high activity in HEAs and contribute advancement high-performance OER electrocatalysts.
Language: Английский
Citations
1
Carbon Neutralization, Journal Year: 2024, Volume and Issue: 3(6), P. 1101 - 1130
Published: Oct. 14, 2024
Abstract Proton exchange membrane water electrolyser (PEMWE) possesses great significance for the production of high purity hydrogen. To expedite anodic oxygen evolution reaction (OER) that involved multiple electron–proton‐coupled process, efficient and stable electrocatalysts are highly desired. Currently, noble‐metal Ir‐based materials benchmark anode due to its corrosion‐resistant property favourable combination activity/stability. However, large‐scale deployment PEMWE is usually constrained use scarcest element iridium. In this review, we disclose current research progress towards non‐iridium‐based OER in acidic media, then summarize some typical oxides good catalytic performance. Besides, also present unresolved problems challenges an attempt enhance activity/stability these catalysts.
Language: Английский
Citations
9
Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)
Published: Jan. 20, 2025
Abstract Reconstructing large, inflammatory maxillofacial defects using stem cell-based therapy faces challenges from adverse microenvironments, including high levels of reactive oxygen species (ROS), inadequate oxygen, and intensive inflammation. Here, inspired by the reaction mechanisms intracellular antioxidant defense systems, we propose de novo design an artificial antioxidase Ru-doped layered double hydroxide (Ru-hydroxide) for efficient redox homeostasis bone regeneration. Our studies demonstrate that Ru-hydroxide consists hydroxyls-synergistic monoatomic Ru centers, which efficiently react with collaborate hydroxyls rapid proton electron transfer, thus exhibiting efficient, broad-spectrum, robust ROS scavenging performance. Moreover, can effectively sustain cell viability osteogenic differentiation in elevated environments, modulating microenvironment during tissue regeneration male mice. We believe this development offers a promising avenue designing antioxidase-like materials to treat various inflammation-associated disorders, arthritis, diabetic wounds, enteritis, fractures.
Language: Английский
Citations
1