Applied Catalysis B Environment and Energy, Год журнала: 2025, Номер 373, С. 125374 - 125374
Опубликована: Апрель 15, 2025
Язык: Английский
Journal of the American Chemical Society, Год журнала: 2025, Номер unknown
Опубликована: Янв. 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.
Язык: Английский
Процитировано
4
Nature Communications, Год журнала: 2025, Номер 16(1)
Опубликована: Янв. 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.
Язык: Английский
Процитировано
1
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Фев. 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.
Язык: Английский
Процитировано
1
Advanced Materials Interfaces, Год журнала: 2025, Номер unknown
Опубликована: Фев. 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
Язык: Английский
Процитировано
1
Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(47)
Опубликована: Авг. 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
Язык: Английский
Процитировано
7
Carbon Neutralization, Год журнала: 2024, Номер 3(6), С. 1101 - 1130
Опубликована: Окт. 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.
Язык: Английский
Процитировано
6
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 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
Язык: Английский
Процитировано
0
Small, Год журнала: 2025, Номер unknown
Опубликована: Янв. 21, 2025
Abstract Renewable energy‐powered seawater electrolysis is a green and attractive technique for producing high‐purity hydrogen. However, severe chlorideions (Cl − ) their derivatives tend to corrode anodic catalysts at ampere‐level current densities hinder the application of seawater‐to‐H 2 systems. Herein, polycalmagite (PCM)‐coated NiFe layered double hydroxide presented on Ni foam (NiFe LDH@PCM/NF) that exhibits exceptional stability in alkaline seawater. PCM not only acts as conductive layer reduce charge transfer resistance anodes but also polymer‐based protective inhibit Cl adsorption stabilize metal ions oxidation due its own anions strong adhesion, thereby increasing activity during Thus, LDH@PCM/NF needs low overpotential 364 mV reach up 1000 mA cm −2 maintains operation 500 h without degradation. Moreover, minimal amount hypochlorite can be detected electrolyte after 500‐h test. This development affords significant exploration creating durable efficient anodes, highlighting importance polymer coating toward anti‐corrosion oxidation.
Язык: Английский
Процитировано
0
Advanced Energy Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 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.
Язык: Английский
Процитировано
0
Journal of Colloid and Interface Science, Год журнала: 2025, Номер 686, С. 711 - 721
Опубликована: Фев. 3, 2025
Язык: Английский
Процитировано
0