Enhancing Oxygen Reduction Reaction in PdH_x@Pt Metallenes: Unveiling the Impact of Ligand Beyond Strain Effect

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 30, 2025

Abstract Incorporating interstitial non‐metal atoms within the crystal lattice of catalysts enables flexible modulation their electronic structures and catalytic performances. However, resulting induced tensile strain typically has a detrimental effect on oxygen reduction reaction (ORR) activity. In this study, series PdH x @Pt metallenes with varying H/Pd ratios, where hydrogen precisely modulate ligand effects Pt skin surface is reported. Notably, 0.35 exhibit an extraordinary half‐wave potential 0.933 V mass activity (MA) 7.36 A mg −1 at 0.9 vs reversible electrode (RHE) for ORR, outperforming both Pd@Pt commercial Pt/C catalysts. Control experiments density functional theory (DFT) calculations reveal competitive relationship between across different dominant positive overcoming negative ratio 0.35. This structure leads to increased 5d electron downshift in e g * band center, thereby weakening adsorption intermediates excellent ORR

Язык: Английский

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Oxygen-Vacancy-Engineered Cr₂CO₂ Electrocatalysts for Efficient Urea Synthesis from Nitrite and Carbon Monoxide

Applied Catalysis B Environment and Energy, Год журнала: 2025, Номер unknown, С. 125327 - 125327

Опубликована: Март 1, 2025

Язык: Английский

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Salt Matrix Strategy for General Synthesis of High-Loading Intermetallic Pt₃M Catalysts toward Electrocatalytic Hydrogen Evolution

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

Pt-based intermetallics are considered a promising class of electrocatalysts owing to their outstanding activity and stability. However, the synthesis usually requires high-temperature annealing, it is difficult prepare small-sized uniformly dispersed intermetallics. Herein, practicable affordable salt matrix strategy proposed for controlled ordered L12-/L10-type Pt-M (M = Fe, Co, Mn, Cr) BaCl2 acts as matrix, trapping nanoparticles avoid particle sintering controlling nanoparticle agglomeration during even at high load (50 wt %). Moreover, has advantage being easily removed from final product. In instance preparing intermetallic Pt3Fe, hydrogen evolution (mass 2.44 A mgPt-1) excellent stability presented in membrane electrode assembly (only 0.6% attenuation after chronopotentiometry). The strategy, which explores an economical scalable approach intermetallics, paves way commercialization PEM water electrolysis technology.

Язык: Английский

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Phase engineering of PtCo alloy supported on N-doped carbon via pyrolysis of ZIF and carbon black for efficient and durable oxygen reduction reaction

Fuel, Год журнала: 2025, Номер 396, С. 135250 - 135250

Опубликована: Апрель 8, 2025

Язык: Английский

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Advanced Development of High‐Entropy Alloys in Catalytic Applications

Small Methods, Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

Abstract Conventional alloys have long been limited by their simple compositions, which make it difficult to meet the requirements of modern catalysis applications. In contrast, high‐entropy (HEAs), characterized multi‐principal elements in near‐equimolar ratios, become a transformative paradigm materials science since inception 2004. The unique core effects HEAs, including effect, severe‐lattice distortion sluggish‐diffusion and cocktail endow them with superior catalytic properties activity, selectivity, durability. However, rapid advanced development comprehensive review applications is imperative foster deeper understanding. this review, capability commencing from entropy‐driven mechanism HEAs systematically explored. Then, are comprehensively analyzed diverse fields, energy conversion, chemical industries, environmental remediation, emphasizing remarkable capabilities Finally, pivotal challenges outlined synthesis methods, mechanistic elucidation, green manufacturing, propose future directions such as database establishment machine‐learning‐assisted design. By addressing knowledge gaps inspiring innovative strategies, aims accelerate translation into practical solutions for sustainable future.

Язык: Английский

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D‐Orbital‐Modulated Ruthenium Embedded within Functionalized Hollow MXene Networks for Enhanced Hydrazine‐Assisted Hydrogen Production

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 18, 2025

Abstract Electrochemical green hydrogen production via water splitting is an attractive and sustainable pathway; however, the sluggish kinetics of anodic oxygen evolution reaction still a critical challenge. In this study, effective electrocatalyst engineering approach demonstrated by preparing innovative hybrid ruthenium d‐orbitals‐regulated nanoclusters embedding within functionalized hollow Ti 3 C 2 MXene networks (Ru 0.91 Ni 0.09 ‐N/O‐Ti ) to promote hydrazine‐assisted production. A specific charge redistribution revealed, locally concentrating at interfaces derived from stable Ru(Ni)‐N/O‐Ti coordination d – p orbital hybridization. The transfer effect Ru structure N/O‐Ti tailors electronic features sites enable reasonable adsorption/desorption toward reactant intermediates. requires overpotential only 29.3 mV for cathodic low potential −29.9 hydrazine oxidation reach 10 mA cm −2 , showing excellent stability. system based on electrodes delivers small cell voltages 0.02 V 0.92 industrial current level 1.0 . This work may open new electrocatalysis strategy lab scale industry robust efficient

Язык: Английский

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Bionic learning in MXene-based actuators: An emerging frontier

Advances in Colloid and Interface Science, Год журнала: 2025, Номер 342, С. 103525 - 103525

Опубликована: Апрель 23, 2025

Язык: Английский

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Surface-rough PtNi alloys loaded on Mo, C-doped TiO2 nanoflowers as efficient and durable catalyst for oxygen reduction reaction in strong acidic medium

Ionics, Год журнала: 2025, Номер unknown

Опубликована: Апрель 23, 2025

Язык: Английский

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Upcycling Spent Cathodes from Li–Ion Batteries into a High-Entropy Alloy Catalyst with Reverse Electron Transfer for Li–O₂ Batteries

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Апрель 30, 2025

Traditional recovery of valuable metals from spent ternary lithium-ion batteries concentrates on complicated pyrometallurgy and hydrometallurgy routes. Direct reutilization these used to catalyze Li-O2 is highly appealing yet remains a significant challenge. Here, we report general synthesis ultrafine αNiCoMn (α = Pt, Ir, Ru) high-entropy alloy (HEA) nanoparticles anchored nitrogen-doped carbon (N-C) support through facile one-step Joule heating, which serves as high-efficiency catalyst for batteries. Solution alloying recycled NiCoMn with Pt group facilitates catalytic efficiency 3d-5d electronic interactions the assembly effect. Both experimental calculation results reveal that, driven by rapid, nonequilibrium thermal shock, electron transfer defies conventional expectations, where electrons are inclined higher electronegative surrounding atoms. This interesting reverse local charge redistribution orbital hybridization endow an elevated d-band center optimized structure. The induced coordination effects further generate active catalysis surfaces, favoring adsorption LiO2 intermediates facilitating rapid decomposition kinetics nanoscale Li2O2 products. These advantages HEA@N-C superior bifunctional activity, achieving ultralow polarization 0.27 V significantly enhanced cycling life 240 cycles. We anticipate that this work will provide insights into upcycling constructing efficient HEA electrocatalysts.

Язык: Английский

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New perspective crosslinking electrochemistry and other research fields: beyond electrochemical reactors

Chemical Science, Год журнала: 2024, Номер 15(18), С. 6608 - 6621

Опубликована: Янв. 1, 2024

Over the years, electrochemical reactors have evolved significantly, with modern now able to achieve a high current density and power output in compact sizes. This leap performance has not only greatly accelerated rate of reactions but also had broader impact on environment. Traditional research perspectives, focused primarily internal working systems reactors, possibly overlook potential regulating their surrounding A novel perspective considering interaction between processes environmental context as unified subject study gradually emerged alongside dramatic development techniques. viewpoint introduces paradigm shift: are isolated entities rather integral parts that interact surroundings. Correspondingly, this calls for an innovative methodology goes beyond studying isolation. Rather, it integrates design system its specific application environment, ensuring seamless integration optimal under various practical conditions. Therefore, metrics should include basic parameters adaptability real-world scenarios laboratory. By focusing application-driven design, applications technology can be more effectively leveraged. is exemplified by based coupled cathodic oxygen reduction anodic evolution reactions. adopting new paradigm, extended fields like medical treatment, food science, microbial fermentation, emphasis tailored designs these fields. comprehensive systematic approach aims fully explore foster interdisciplinary collaboration field.

Язык: Английский

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