Understanding the Dynamic Evolution of Active Sites among Single Atoms, Clusters, and Nanoparticles

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Abstract Catalysis remains a cornerstone of chemical research, with the active sites catalysts being crucial for their functionality. Identifying sites, particularly during reaction process, is elucidating relationship between catalyst's structure and its catalytic property. However, dynamic evolution within heterogeneous metal presents substantial challenge accurately pinpointing real sites. The advent in situ operando characterization techniques has illuminated path toward understanding changes offering robust scientific evidence to support rational design catalysts. There pressing need comprehensive review that systematically explores among single atoms, clusters, nanoparticles as utilizing techniques. This aims delineate effects various factors on nanoparticles. Moreover, several are elaborated emphases tracking linking them properties. Finally, it discusses challenges future perspectives identifying process advancing

Language: Английский

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Efficient Catalysis for Zinc–Air Batteries by Multiwalled Carbon Nanotubes‐Crosslinked Carbon Dodecahedra Embedded with Co–Fe Nanoparticles

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Abstract The design and fabrication of nanocatalysts with high accessibility sintering resistance remain significant challenges in heterogeneous electrocatalysis. Herein, a novel catalyst is introduced that combines electronic pumping alloy crystal facet engineering. At the nanoscale, pump leverages chemical potential difference to drive electron migration from one region another, separating transferring electron‐hole pairs. This mechanism accelerates reaction kinetics improves rate. interface structure optimization enables CoFe/carbon nanotube (CNT) exhibit outstanding oxygen reduction (ORR) evolution (OER) performance. Specifically, this achieves an ORR half‐wave (E₁/₂) 0.895 V, outperforming standard Pt/C RuO₂ electrocatalysts terms both specific activity stability. It also demonstrates excellent electrochemical performance for OER, overpotential only 287 mV at current density 10 mA cm⁻ 2 . Theoretical calculations reveal carefully designed facets reduce energy barrier rate‐determining steps optimizing O₂ adsorption promoting capture process. study highlights developing cost‐effective bifunctional ORR–OER electrocatalysts, offering promising strategy advancing Zn–air battery technology.

Language: Английский

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Synthesis Strategies for High Entropy Nanoparticles

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 30, 2024

Abstract Nanoparticles (NPs) of high entropy materials (HEMs) have attracted significant attention due to their versatility and wide range applications. HEM NPs can be synthesized by fragmenting bulk HEMs or disintegrating recrystallizing them. Alternatively, directly producing in NP form from atomic/ionic/molecular precursors presents a challenge. A widely adopted strategy involves thermodynamically driving formation leveraging the entropic contribution but incorporating strategies limit growth at elevated temperatures used for maximizing entropy. second approach is kinetically drive promoting rapid reactions homogeneous reactant mixtures using highly diluted precursor dissolutions. Additionally, experimental evidence suggests that enthalpy plays role processes moderate temperatures, with energy cost generating additional surfaces interfaces nanoscale stabilizing phase. This review critically assesses various synthesis developed preparation, highlighting key illustrative examples offering insights into underlying mechanisms. Such are critical fine‐tuning conditions achieve specific outcomes, ultimately enabling effective optimized generations these advanced both current emerging applications across scientific technological fields.

Language: Английский

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CeO₂‐Accelerated Surface Reconstruction of CoSe₂ Nanoneedle Forms Active CeO₂@CoOOH Interface to Boost Oxygen Evolution Reaction for Water Splitting

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 10, 2024

Abstract Interface engineering is an efficient strategy to create high‐performance electrocatalysts for water splitting. In the present work, CeO 2 @CoSe nanoneedle on carbon cloth (CeO /CC) demonstrates high efficiency oxygen evolution reaction (OER) and with abundant O vacancies facilitates adsorption of OH − boosts reconstruction CoSe into CoOOH at lower potentials. The in situ generated active @CoOOH heterointerface upshifts d‐band center Co site, thereby decreasing free energy rate‐determining step (RDS) ( * OOH) during OER process. It delivers a low overpotential 245 mV 10 mA cm −2 . /CC also found be hydrogen (HER, 138 ), profiting from ‐facilitated H dissociation overall splitting achieved over bifunctional electrode electrolysis voltage 1.54 V This work offers valuable insights ‐assisted surface as well provides catalysts through interface engineering.

Language: Английский

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Research progress on NiCo-LDH electrocatalysts for oxygen evolution reaction

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 102, P. 304 - 320

Published: Jan. 11, 2025

Language: Английский

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High Coverage Sub‐Nano Iridium Cluster on Core–Shell Cobalt‐Cerium Bimetallic Oxide for Highly Efficient Full‐pH Water Splitting

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 14, 2024

Abstract The construction of sub‐nanometer cluster catalysts (<1 nm) with almost complete exposure active atoms serves as a promising avenue for the simultaneous enhancement atom utilization efficiency and specific activity. Herein, core–shell cobalt‐cerium bimetallic oxide protected by high coverage Ir clusters (denoted cluster@CoO/CeO 2 ) is constructed confined in situ exsolution strategy. distinctive structure endows enhanced intrinsic activity conductivity, facilitating efficient charge transfer full‐pH water splitting. achieves low overpotentials 49/215, 52/390, 54/243 mV at 10 mA cm −2 hydrogen evolution reaction/oxygen reaction (HER/OER) 0.5 m H SO 4 , 1.0 PBS, KOH, respectively. small decline performance after 300 h operation renders it one most effective DFT calculations indicate that oriented electron (along path from Ce to Co then Ir) creates an electron‐rich environment surface clusters. reconstructed interface electronic provides optimized intermediates adsorption/desorption energy site (for HER) Ir‐Co OER), thus simultaneously speeding up HER/OER kinetics.

Language: Английский

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Eco-Friendly Synthesis of Rod-Like Hydroxyapatite on Spherical Carbon: A Dual-Function Composite for Selective Cobalt Removal and Enhanced Oxygen Evolution Reaction

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 487, P. 137164 - 137164

Published: Jan. 8, 2025

Language: Английский

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Theoretical insights into performance descriptors and their impact on activity optimization strategies for cobalt-based electrocatalysts

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 533, P. 216560 - 216560

Published: Feb. 27, 2025

Language: Английский

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Interface engineering combined with P, N self-doped synergistic optimization strategies for designing Co/CoO@PNC heterojunction elecrocatalyst for accelerating oxygen evolution reaction

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179550 - 179550

Published: March 1, 2025

Language: Английский

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Rational design of V doped CoP/Ni2P heterostructural catalysts for highly efficient ethanol electrolysis

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179593 - 179593

Published: March 1, 2025

Language: Английский

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