ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2071 - 2079
Published: April 30, 2025
Language: Английский
Nature Catalysis, Journal Year: 2024, Volume and Issue: 7(12), P. 1288 - 1304
Published: Dec. 17, 2024
Language: Английский
Citations
25
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 25, 2025
Abstract To overcome the challenges of low catalytic activity and instability, a molecular weight engineering strategy coupled with oxidative ammonolysis is developed to synthesize CoRu‐based alloy catalysts distinct morphologies properties from biorefinery lignin. This approach effectively modulates intrinsic active sites exposes unsaturated nitrogen‐oxygen structures, thereby tailoring morphology defect structure carbon layers in catalysts. The as‐synthesized CoRu lignin precursors varying weights are designated as CoRu@OALC‐EtOAC, CoRu@OALC‐EtOH, CoRu@OALC‐Residual. featuring defect‐rich graphitic carbon‐coated structure, exhibited exceptional overall water‐splitting performance (1.48 V at 10 mA cm −2 ), significantly surpassing Pt/C || Ru/C (1.58 ). In contrast, CoRu@OALC‐Residual, its amorphous demonstrated remarkable stability (350 h 100 vastly outperforming (6 In‐situ Raman spectroscopy DFT calculations revealed that adsorb * H intermediates, accelerating process. strong adsorption also induces layer rearrangement, leading dissolution oxidation metal particles. provides universal method for biomass‐derived catalysts, establishing direct relationship between weight, catalyst morphology, electrocatalytic performance.
Language: Английский
Citations
6
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 4, 2025
Abstract Proton exchange membrane water electrolysis (PEMWE) represents a promising technology for renewable hydrogen production. However, the large‐scale commercialization of PEMWE faces challenges due to need acid oxygen evolution reaction (OER) catalysts with long‐term stability and corrosion‐resistant electrode assemblies (MEA). This review thoroughly examines deactivation mechanisms acidic OER crucial factors affecting assembly instability in complex environments, including catalyst degradation, dynamic behavior at MEA triple‐phase boundary, equipment failures. Targeted solutions are proposed, improvements, optimized designs, operational strategies. Finally, highlights perspectives on strict activity/stability evaluation standards, situ/operando characteristics, practical electrolyzer optimization. These insights emphasize interrelationship between catalysts, MEAs, activity, stability, offering new guidance accelerating systems.
Language: Английский
Citations
5
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 27, 2024
Abstract Integrating active sites for oxygen reduction and evolution reactions (ORR OER) is pivotal advancing bifunctional electrodes. Addressing the geometric/electronic properties of these essential to disrupt linear scaling relationship between adsorption desorption complex intermediates. Herein, a proof‐of‐concept presented constructing asymmetric trinuclear employing both composition‐ size‐based coupling strategies. These comprise ORR‐active Fe single atom (Fe SA ), OER‐active atomically clustered species AC Ni as modulators. This AC‐SA ‐Ni @N‐doped carbon exhibits excellent catalytic activities, with narrow potential gap 0.661 V an ORR half‐wave 0.931 OER 1.592 at 10 mA cm −2 . The Zn‐air battery this material achieves peak power density 293 mW , specific capacity 748 mAh g Zn −1 remarkable stability. Experimental findings theoretical simulations reveal that induced strong electronic among centers, facilitating charge redistribution optimizing barriers enhances rapid release * OH during efficient transformation from O OOH OER. study presents novel strategy developing robust
Language: Английский
Citations
18
Energy Materials, Journal Year: 2025, Volume and Issue: 5(3)
Published: Jan. 15, 2025
The lattice oxygen mechanism (LOM) plays a critical role in the acidic evolution reaction (OER) as it provides more efficient catalytic pathway compared to conventional adsorption (AEM). LOM effectively lowers energy threshold of and accelerates rate by exciting atoms catalyst directly participate OER process. In recent years, with increase in-depth understanding LOM, researchers have developed variety iridium (Ir) ruthenium (Ru)-based catalysts, well non-precious metal oxide optimized their performance through different strategies. However, still faces many challenges practical applications, including long-term stability precise modulation active sites, application efficiency real electrolysis systems. Here, we review OER, analyze its difference traditional AEM new (OPM) mechanism, discuss experimental theoretical validation methods pathway, prospect future development electrocatalyst design conversion, aiming provide fresh perspectives strategies for solving current challenges.
Language: Английский
Citations
2
Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 686, P. 438 - 447
Published: Feb. 1, 2025
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
eScience, Journal Year: 2024, Volume and Issue: unknown, P. 100323 - 100323
Published: Oct. 1, 2024
Language: Английский
Citations
9
Nano Letters, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 25, 2024
Developing highly efficient non-iridium-based active sites for acidic water splitting is still a huge challenge. Herein, unique Ru-B-Cr moieties have been constructed in RuO
Language: Английский
Citations
9
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 21, 2024
The development of high-performance non-Ir/Ru catalysts for the oxygen evolution reaction (OER) in acid is critical applications proton exchange membrane water electrolyzers (PEMWEs). Here, we report a new kind heterostructure catalyst by loading 5.8% Ag nanoparticles on MnO nanorods (Ag/MnO) acidic OER. as-prepared Ag/MnO requires only an overpotential 196 mV OER at current density 10 mA cm–2 0.5 M H2SO4 and operates PEMWE over 300 h 200 cm–2, representing one best catalysts. Operando X-ray absorption spectroscopy confirms that introduction trace can promote generation highly active Mn3+–O sites with vacancies low voltage, leading to dual-metal-site lattice oxygen-mediated pathway faster kinetics than adsorbate mechanism. Theoretical calculations indicate promotes overlap between d orbitals Mn s, p O, thereby activating reducing energy barrier. dissolution also suppressed due increased vacancy formation Mn, where stability number reaches high value 3058, supporting improved structural stability.
Language: Английский
Citations
7