Nano-Structures & Nano-Objects, Год журнала: 2025, Номер 41, С. 101457 - 101457
Опубликована: Фев. 1, 2025
Язык: Английский
Nature Communications, Год журнала: 2025, Номер 16(1)
Опубликована: Янв. 17, 2025
Язык: Английский
Процитировано
3
Small, Год журнала: 2025, Номер unknown
Опубликована: Янв. 9, 2025
Abstract The development of efficient hydrogen evolution reaction (HER) catalysts is crucial for water electrolysis. Currently, Ru‐based are considered top contenders, but issues with stability, activity, and cost remain. In this work, RuNi alloys possessing a solid solution structure within the Ru lattice prepared via straightforward electrodeposition on various substrates assessed as HER in alkaline media. A containing 9.8 at. % Ni deposited Ti substrate, wherein content greatly surpasses solubility limit at room temperature, exhibits considerably low overpotential 28 mV current density 10 mA cm − 2 , along good long‐term stability (less than 100 increase after 600 h). enhancement performance results from increased electron around atoms due to coordination, which facilitates desorption H * catalyst surface produce . Concurrently, incorporating reduces usage, rendering alloy viable cost‐effective practical applications.
Язык: Английский
Процитировано
2
Journal of the American Chemical Society, Год журнала: 2025, Номер unknown
Опубликована: Янв. 12, 2025
The bifunctional mechanism, involving multiactive compositions to simultaneously dissociate water molecules and optimize intermediate adsorption, has been widely used in the design of catalysts boost electrolysis for sustainable hydrogen energy production but remains debatable due difficulties accurately identifying reaction process. Here, we proposed concept well-defined Lewis pairs single-atom catalysts, with a unique acid-base nature, comprehensively understand exact role an alkaline evolution reaction. By facilely adjusting active moieties, induced synergistic effect between (M-P/S/Cr pairs, M = Ru, Ir, Pt) can significantly facilitate cleavage H-OH bond accelerate removal intermediates, thereby switching rate-determining step from Volmer Heyrovsky step. Moreover, representative Ru-P deliver impressive 266 h durability at high industrial current density 2 A cm-2 without activity decay anion-exchange membrane electrolysis, be extended modify commercial noble-metal-based performance enhancement. This work not only sheds light on important mechanism scale also offers universal descriptor rational advanced catalysts.
Язык: Английский
Процитировано
2
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
2
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 28, 2025
Abstract Developing highly efficient catalysts to accelerate sluggish electrode reactions is critical for the deployment of sustainable aqueous electrochemical technologies, yet remains a great challenge. Rationally integrating functional components tailor surface adsorption behaviors and adsorbate dynamics would divert reaction pathways alleviate energy barriers, eliminating conventional thermodynamic constraints ultimately optimizing flow within systems. This approach has, therefore, garnered significant interest, presenting substantial potential developing that simultaneously enhance activity, selectivity, stability. The immense promise rapid evolution this design strategy, however, do not overshadow challenges ambiguities persist, impeding realization breakthroughs in electrocatalyst development. review explores latest insights into principles guiding catalytic surfaces enable favorable contexts hydrogen oxygen electrochemistry. Innovative approaches tailoring adsorbate‐surface interactions are discussed, delving underlying govern these dynamics. Additionally, perspectives on prevailing presented future research directions proposed. By evaluating core identifying gaps, seeks inspire rational design, discovery novel mechanisms concepts, ultimately, advance large‐scale implementation electroconversion technologies.
Язык: Английский
Процитировано
2
Advanced Science, Год журнала: 2025, Номер unknown
Опубликована: Фев. 5, 2025
Abstract Developing efficient and cost‐effective electrocatalysts to replace expensive carbon‐supported platinum nanoparticles for the alkaline hydrogen evolution reaction remains an important challenge. Recently, innovative catalyst, composed of ruthenium single atoms (Ru 1 ) integrated with small Ru nanoclusters NC ), has attracted considerable attention from scientific community. However, because its complexity, this catalyst a topic some debate. Here, method is reported precisely controlling ratios on nitrogenated carbon (NC)‐based porous organic framework produce Ru/NC catalysts, by using different amounts (0, 5, 10 wt.%) reducing agent. The Ru/NC–10 formed wt.% agent, delivered best performance under conditions, indicating that played significant role in actual (HER). An anion exchange membrane water electrolyzer (AEMWE) system required significantly lower operating voltage (1.72 V) than commercial Pt/C (1.95 achieve 500 mA cm −2 . Moreover, can be operated at 100 without notable decay over 180 h. Theoretical calculations supported these experimental findings contributed dissociation process, while more actively associated recombination process.
Язык: Английский
Процитировано
2
Advanced Energy Materials, Год журнала: 2025, Номер unknown
Опубликована: Фев. 10, 2025
Abstract Designing heterogeneous interface to enhance the kinetics for electrocatalysts is a highly efficient but challenging pathway toward hydrogen evolution reaction (HER) in water electrolysis. Herein, coupling of CeO 2 quantum dots onto porous Ru aerogel through interfacial Ru‐O‐Ce bridge proposed construct ‐Ru as superior HER electrocatalyst with ultra‐low overpotentials. In situ characterizations and theoretical calculations reveal electron distribution at boost bonding sites, faster adsorption dissociation sites kinetics. Furthermore, employed excellent cathodes both acidic alkaline electrolyzers ampere‐level current density stably operated over 500 hours. Thus, synergistic effect tunes catalytic mechanism reinforces activity, realizing generation
Язык: Английский
Процитировано
2
Nano Letters, Год журнала: 2024, Номер 24(43), С. 13653 - 13661
Опубликована: Окт. 21, 2024
Reducing the charging voltage is a prerequisite for improving chargeability and energy efficiency of Zn-air batteries (ZABs). Herein, Fe
Язык: Английский
Процитировано
14
Advanced Energy Materials, Год журнала: 2024, Номер 14(45)
Опубликована: Окт. 28, 2024
Abstract High‐current‐density water electrolysis is considered a promising technology for industrial‐scale green hydrogen production, which of significant value to energy decarbonization and numerous sustainable industrial applications. To date, substantial research advancements are achieved in catalyst design laboratory‐based electrolysis. While the designed catalysts demonstrate remarkable performance at low current densities, they suffer from marked deteriorations both activity long‐term stability under industrial‐level high‐current‐density operations. provide timely assessment that helps bridge gap between laboratory‐scale fundamental practical technology, here various commercial electrolyzers first systematically analyzed, then key parameters including work temperature, density, lifetime stacks, cell efficiency, capital cost stacks critically evaluated. In addition, impact high density on electrocatalytic behavior catalysts, intrinsic activity, stability, mass transfer, discussed advance design. Therefore, by covering range critical issues material principles parameters, future directions development highly efficient low‐cost presented procedure screening laboratory‐designed outlined.
Язык: Английский
Процитировано
12
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Сен. 28, 2024
Abstract Alkaline hydrogen evolution reaction (HER) has great potential in practical production but is still limited by the lack of active and stable electrocatalysts. Herein, efficient water dissociation process, fast transfer adsorbed hydroxyl optimized adsorption are first achieved on a cooperative electrocatalyst, named as Ru–Sn/SnO 2 NS, which Ru–Sn dual metal sites SnO heterojunction constructed based porous Ru nanosheet. The density functional theory (DFT) calculations situ infrared spectra suggest that can optimize process adsorption, while existence induce unique spillover effect, accelerating avoiding poison sites. As results, NS display remarkable alkaline HER performance with an extremely low overpotential (12 mV at 10 mA cm −2 ) robust stability (650 h), much superior to those (27 90 h stability) (16 120 stability). work sheds new light designing electrocatalyst.
Язык: Английский
Процитировано
11