Atomically dispersed multi-site catalysts: bifunctional oxygen electrocatalysts boost flexible zinc–air battery performance

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(14), P. 4847 - 4870

Published: Jan. 1, 2024

Based on the advancements in atomically dispersed multi-site catalysts for FZABs, this review discusses design methodologies to regulate performance of bifunctional oxygen electrocatalysts from electronic and geometric structures.

Language: Английский

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Hetero‐Diatomic CoN₄‐NiN₄ Site Pairs with Long‐Range Coupling as Efficient Bifunctional Catalyst for Rechargeable Zn–Air Batteries

Advanced Science, Journal Year: 2024, Volume and Issue: 11(22)

Published: March 30, 2024

Abstract In this study, Co/Ni‐NC catalyst with hetero‐diatomic Co/Ni active sites dispersed on nitrogen‐doped carbon matrix is synthesized via the controlled pyrolysis of ZIF‐8 containing Co 2+ and Ni compounds. Experimental characterizations theoretical calculations reveal that are atomically uniformly in pairs CoN 4 ‐NiN an intersite distance ≈0.41 nm, there long‐range d – coupling between more electron delocalization for higher bifunctional activity. Besides, situ grown nanotubes at edges particles allow high electronic conductivity electrocatalysis process. Electrochemical evaluations demonstrate superior ORR OER bifunctionality a narrow potential gap only 0.691 V long‐term durability, significantly prevailing over single‐atom Co‐NC Ni‐NC catalysts benchmark Pt/C RuO 2 catalysts. catalyzed Zn–air batteries achieve specific capacity 771 mAh g −1 long continuous operation period up to 340 h small voltage ≈0.65 V, also much Pt/C‐RuO .

Language: Английский

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Structural Regulation Strategies of Atomic Cobalt Catalysts for Oxygen Electrocatalysis

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

Published: March 3, 2025

Abstract Oxygen electrocatalysis is a core reaction in renewable energy devices, greatly promoting the transformation and upgrading of structure. Nonetheless, performance conversion devices hindered by large overpotential slow kinetics oxygen electrocatalytic reactions. Recently, single‐atom catalysts (SACs) have emerged as promising contenders field because their exceptional metal atom utilization, distinctive coordination environment, adjustable electronic properties. This review presents latest advancements design Co‐based SACs for electrocatalysis. First, OER ORR mechanisms are introduced. Subsequently, strategies regulating structure summarized three aspects, including centers, support carriers. A particular emphasis given to relationship between properties catalysts. Afterward, applications explored. Ultimately, challenges prospects prospected.

Language: Английский

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Facile Microwave Synthesis of Kilogram‐Scale Electrocatalysts with Nanocarbons Bridged Cobalt Active Sites for Enhanced Oxygen Electrocatalysis

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

Published: March 30, 2025

Abstract Oxygen reductions and evolution reactions (ORR/OER) are pivotal electrochemical processes in fuel cells metal‐air batteries, yet the rapid, large‐scale production of efficient ORR/OER electrocatalysts remains challenging. Herein, a groundbreaking microwave‐synthesis strategy is presented that enables rapid facile preparation kilogram‐scale electrocatalysts. The unique microwave irradiation generates instantaneous thermal energy, facilitating formation nano‐carbon bridges interconnect high‐density active sites comprising cobalt single atoms nanoparticles. This innovative architectural configuration significantly enhances kinetics electron/mass transfer maximizing accessibility sites. optimized carbon‐bridged catalyst (CBCo‐800) demonstrates commendable half‐wave potential ( E 1/2 ) 0.86 V versus RHE minimal overpotential difference (Δ 0.696 V. Furthermore, lab‐assembled zinc‐air battery utilizing CBCo‐800 achieved great specific capacity 794 mAh g −1 sustained over 650 h, outperforming commercial Pt/C RuO 2 catalysts. Density functional theory (DFT) calculations elucidate nanocarbon bridge between dual‐active boosts oxygen activation optimizes adsorption/desorption dynamics *OH/*OOH intermediates, thereby lowering energy barriers for ORR/OER. study offers solution producing site materials, also establishes robust platform mass high‐performance

Language: Английский

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Electronic Structure Modulation Induced by the Synergy of Cobalt Low-Nuclearity Clusters and Mononuclear Sites for Efficient Oxygen Electrocatalysis

ACS Nano, Journal Year: 2024, Volume and Issue: 19(1), P. 1600 - 1610

Published: Dec. 27, 2024

The development of high-performance bifunctional single-atom catalysts for use in applications, such as zinc–air batteries, is greatly impeded by mild oxygen reduction and evolution reactions (ORR OER). Herein, we report a electrocatalyst designed to overcome these limitations. catalyst consists well-dispersed low-nuclearity Co clusters adjacent single atoms over nitrogen-doped carbon matrix (CoSA+C/NC). precisely tailored asymmetric electronic structures are achieved with strong interactions between species. optimize the adsorption/desorption strength oxygenated intermediates on single-atomic sites endow exceptional activity under alkaline conditions half-wave potential (E1/2) 0.91 V an overpotential (η) 340 mV at 10 mA cm–2. In addition, battery assembled CoSA+C/NC achieves high power density 284.1 mW cm–2 long operational lifespan 400 h, superior those benchmark Pt/C + RuO2. Experimental findings theoretical analysis reveal that enhanced stems from synergistic sites. Consequently, overbinding *OH suppressed accelerated removal. This work establishes design principle advanced electrocatalysts multiphase metal species bearing interactions.

Language: Английский

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Dual-atom catalysts with microenvironment regulation for water electrolysis

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(39), P. 26316 - 26349

Published: Jan. 1, 2024

Dual-atom catalysts (DACs) have emerged as highly promising and efficient for water electrolysis, primarily due to their distinct dual-atom site effects.

Language: Английский

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Recent Achievements in Heterogeneous Bimetallic Atomically Dispersed Catalysts for Zn–Air Batteries: A Minireview

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 4, 2024

Abstract Rechargeable Zn–air batteries (ZABs) hold promise as the next‐generation energy‐storage devices owing to their affordability, environmental friendliness, and safety. However, cathodic catalysts are easily inactivated in prolonged redox potential environments, resulting inadequate energy efficiency poor cycle stability. To address these challenges, anodic active sites require multiple‐atom combinations, that is, ensembles of metals. Heterogeneous bimetallic atomically dispersed (HBADCs), consisting heterogeneous isolated single atoms atomic pairs, expected synergistically boost cyclic oxygen reduction evolution reactions ZABs tuneable microenvironments. This minireview revisits recent achievements HBADCs for ZABs. Coordination environment engineering catalytic substrate structure optimization strategies summarized predict innovation direction ZAB performance enhancement. These divided into ferrous nonferrous dual with unique microenvironments, including synergistic effects, ion modulation, electronic coupling, activity. Finally, conclusions perspectives relating future challenges opportunities provided optimise

Language: Английский

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Importance of d-electron coupling in dual-atom catalysts for electrocatalytic CO2 reduction reaction

Science China Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 14, 2025

Language: Английский

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Ultrafast Conversion of Water and Oxygen Molecules With Dissociation of Hydrogen Bonding Effect to Achieve Extra‐High Energy Efficiency of Secondary Metal‐Air Batteries

Small, Journal Year: 2024, Volume and Issue: 20(46)

Published: Aug. 8, 2024

Abstract Metal‐air secondary batteries with ultrahigh specific energies have received vast attention and are considered new promising energy storage. The slow redox reactions between oxygen‐water molecules lead to low efficiency (55–71%) limited applications. Herein, it is proposed that the MIL‐68(In)‐derived porous carbon nanotube supports CoNiFeP heteroconjugated alloy catalyst an overboiling point electrolyte achieve oxidation rate of water molecules. Structural characterization density functional theory calculations reveal greatly reduces free process, further accelerates dissociation O─H hydrogen bonds, release O 2 molecules, achieving extra‐low overpotential 110 mV@10 mA cm −2 far lower than commercial Ir/C catalysts 192 mV at 125 °C state‐of‐the‐art. Furthermore, assembled rechargeable zinc‐air begins break through 85 °C, jumps 100 reaches 88.1% ultralow decay 0.0068% after 150 cycles superior those reported metal‐air batteries. This work provides a joint‐design strategy reexamines battery operating temperature construct higher for fuel cells.

Language: Английский

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Building Cobalt‐Nickel Diatomic Sites as Oxygenophilic ORR Catalyst with Strong Cl⁻‐Corrosion Resistance for Seawater Batteries

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 15, 2024

The seawater battery (SWB) holds great potential as the next-generation energy supply system for marine electrical equipment. However, its efficiency and durability are hindered by low oxygen concentration harmful Cl

Language: Английский

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