2D surfaces twisted to enhance electron freedom toward efficient advanced oxidation processes

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 345, P. 123701 - 123701

Published: Jan. 6, 2024

Language: Английский

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Recent Advances in Non‐Precious Metal Single‐Atom Electrocatalysts for Oxygen Reduction Reaction in Low‐Temperature Polymer‐Electrolyte Fuel Cells

ChemCatChem, Journal Year: 2023, Volume and Issue: 15(22)

Published: Oct. 9, 2023

Abstract Fuel cells have emerged as a promising clean electrochemical energy technology with great potential in various sectors, including transportation and power generation. However, the high cost scarcity of noble metals currently used to synthesise electrocatalysts for low‐temperature fuel has hindered their widespread commercialisation. In recent decades, development non‐precious metal cathodic oxygen reduction reaction (ORR) gained significant attention. Among those, atomically dispersed active sites, referred single‐atom catalysts (SACs), are gaining more interest. Nanocarbon materials containing single transition atoms coordinated nitrogen ORR both acidic alkaline conditions thus promise be utilised cathode cells. This review article provides an overview advancements utilisation metal‐based SACs proton exchange membrane (PEMFCs) anion (AEMFCs). We highlight main strategies synthetic approaches tailoring properties enhance activity durability. Based on already achieved results, it is evident that indeed could suitable

Language: Английский

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Regulating the Electronic Synergy of Asymmetric Atomic Fe Sites with Adjacent Defects for Boosting Activity and Durability toward Oxygen Reduction

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(29)

Published: March 17, 2024

Abstract The oxygen reduction reaction (ORR) plays a fundamental role in sustainable energy technologies. However, the creation of non‐precious metal electrocatalysts with high ORR activity and durability under all pH conditions is great significance but remains challenging. Herein, aim to overcome this challenge by creating Fe single atom catalyst on 2D defect‐containing nitrogen‐doped carbon support (Fe 1 /DNC) via microenvironment engineering strategy. Microkinetic modeling reveals that FeN 4 (OH) moieties are real active sites conditions. Due synergistic promotion effect denser accessible defect‐induced electronic properties, /DNC achieves extraordinary alkaline, acidic, neutral conditions, half‐wave potentials 0.95, 0.82, 0.70 V, respectively. Moreover, negligible performance decay observed stability methanol tolerance tests. Zn‐air battery employing delivers remarkable peak power density long‐term operational durability. Theoretical analysis provides compelling evidence defects adjacent can endow an inductive reshape properties balance OOH* formation OH* reduction. This work offers insight into regulation asymmetric coordination structure for boosting electrocatalytic stability.

Language: Английский

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Materials Containing Single‐, Di‐, Tri‐, and Multi‐Metal Atoms Bonded to C, N, S, P, B, and O Species as Advanced Catalysts for Energy, Sensor, and Biomedical Applications

Advanced Science, Journal Year: 2024, Volume and Issue: 11(33)

Published: July 1, 2024

Abstract Modifying the coordination or local environments of single‐, di‐, tri‐, and multi‐metal atom (SMA/DMA/TMA/MMA)‐based materials is one best strategies for increasing catalytic activities, selectivity, long‐term durability these materials. Advanced sheet supported by metal atom‐based have become a critical topic in fields renewable energy conversion systems, storage devices, sensors, biomedicine owing to maximum utilization efficiency, precisely located centers, specific electron configurations, unique reactivity, precise chemical tunability. Several offer excellent support are attractive applications energy, medical research, such as oxygen reduction, production, hydrogen generation, fuel selective detection, enzymatic reactions. The strong metal–metal metal–carbon with metal–heteroatom (i.e., N, S, P, B, O) bonds stabilize optimize electronic structures atoms due interfacial interactions, yielding activities. These provide models understanding fundamental problems multistep This review summarizes substrate structure‐activity relationship different active sites based on experimental theoretical data. Additionally, new synthesis procedures, physicochemical characterizations, biomedical discussed. Finally, remaining challenges developing efficient SMA/DMA/TMA/MMA‐based presented.

Language: Английский

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Spatially Axial Boron Coordinated Single‐Atom Nanozymes with Boosted Multi‐Enzymatic Performances for Periodontitis Treatment

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

Published: May 3, 2024

Abstract Single‐atom nanozymes (SAzymes) have made significant strides in antibacterial treatment but fall short as natural enzyme and drug replacements due to limited catalytic performance. Here, a rational strategy is presented for incorporating spatially axial boron (B) ligands effectively modulate the local coordination environment of planar Fe─N 4 motifs (Fe─B/N─C SAzymes). With electronic modulation, Fe─B/N─C SAzymes exhibit significantly enhanced oxidase‐, peroxidase‐, catalase‐like activities. Theoretical calculations highlight that B adjust charge distribution around active center, which facilitates heterolysis H 2 O desorption , resulting accelerated decomposition. Furthermore, intrinsic photothermal effect enhances multienzyme‐like activities, rapidly generating abundant reactive oxygen species (ROS), achieving chemodynamic/photothermal synergistic therapy impressive disinfection against periodontal‐related pathogenic bacteria. These findings offer distinctive viewpoint optimizing with ligand enhance their performance effectiveness periodontitis therapy.

Language: Английский

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Structure–Activity Relationships in Oxygen Electrocatalysis

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

Published: Sept. 30, 2024

Abstract Oxygen electrocatalysis, as the pivotal circle of many green energy technologies, sets off a worldwide research boom in full swing, while its large kinetic obstacles require remarkable catalysts to break through. Here, based on summarizing reaction mechanisms and situ characterizations, structure–activity relationships oxygen electrocatalysts are emphatically overviewed, including influence geometric morphology chemical structures electrocatalytic performances. Subsequently, experimental/theoretical is combined with device applications comprehensively summarize cutting‐edge according various material categories. Finally, future challenges forecasted from perspective catalyst development applications, favoring researchers promote industrialization electrocatalysis at an early date.

Language: Английский

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Improvement in ORR Durability of Fe Single-Atom Carbon Catalysts Hybridized with CeO₂ Nanozyme

Nano Letters, Journal Year: 2024, Volume and Issue: 24(29), P. 9034 - 9041

Published: July 11, 2024

FeNC catalysts are considered one of the most promising alternatives to platinum group metals for oxygen reduction reaction (ORR). Despite extensive research on improving ORR activity, undesirable durability is still a critical issue its practical application. Herein, inspired by antioxidant mechanism natural enzymes, CeO

Language: Английский

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Highly dispersed carbon-encapsulated FeS/Fe3C nanoparticles distributed in Fe-N-C for enhanced oxygen electrocatalysis and Zn-air batteries

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 487, P. 150673 - 150673

Published: March 24, 2024

Language: Английский

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Molecularly engineered potential of d-orbital modulated iron-bridged delaminated MBene for rechargeable Zn–air batteries

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(18), P. 6559 - 6570

Published: Jan. 1, 2024

An air cathode with high catalytic activity and reversibility toward the OER ORR is designed by typical coordinations of iron phthalocyanine molecule crystals on delaminated MoAl 1− x B MBene sheets.

Language: Английский

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Recent Progress in ZIF‐Derived Carbons for Enhanced Oxygen Reduction Reaction Electrocatalysis

ChemCatChem, Journal Year: 2024, Volume and Issue: 16(9)

Published: Jan. 5, 2024

Abstract The oxygen reduction reaction (ORR) represents a cornerstone for many clean energy conversion technologies such as fuel cells and metal‐air batteries. Nevertheless, the commercialization of these is largely impeded by slow kinetics ORR, which active, durable cost‐effective ORR catalysts are needed. In recent years, zeolitic imidazolate framework (ZIF) derived carbon materials emerge new class non‐precious metal (NPMCs) toward benefiting from their high surface area, abundant porosity, tunable chemical/electronic structure, superior activity comparable or even surpasses those state‐of‐the‐art Pt‐based catalysts. This review offers comprehensive overview advances in ZIF‐derived carbons ORR. synthesis strategies key factors affecting performance discussed. Future research directions perspectives on exploring ZIF efficient highlighted, with focus principles rationally engineering coordination structures active sites.

Language: Английский

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