Selective oxygen reduction reaction: mechanism understanding, catalyst design and practical application

Chemical Science, Journal Year: 2024, Volume and Issue: 15(29), P. 11188 - 11228

Published: Jan. 1, 2024

The oxygen reduction reaction (ORR) is a key component for many clean energy technologies and other industrial processes. However, the low selectivity sluggish kinetics of ORR catalysts have hampered conversion efficiency real application these new mentioned before. Recently, tremendous efforts been made in mechanism understanding, electrocatalyst development system design. Here, comprehensive critical review provided to present recent advances field electrocatalytic ORR. two-electron four-electron transfer catalytic mechanisms evaluation parameters are discussed first. Then, up-to-date synthetic strategies

Language: Английский

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CeO₂ Boosted Fe‐N₅ Electrocatalyst via Relay Catalysis for Modulating Oxygen Reduction Reaction in Al‐Air Batteries

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

Published: March 3, 2025

Abstract Atomically dispersed iron‐nitrogen‐carbon (Fe‐N‐C) catalysts have demonstrated promising oxygen reduction reaction (ORR) activity. It poses a formidable challenge to simultaneously optimize the adsorption energies of multiple intermediates at single active site. In addition, lack long‐term stability remains significant problem due unavoidable 2‐electron by‐product hydrogen peroxide (H 2 O ). Here, sites are achieved modulate energy while removing by growing second site CeO nanoparticles in situ on surface hollow‐structured Fe‐N 5 , thus improving efficiency and /CeO . Density functional theory (DFT) calculations employed probe into synergistic catalytic interaction between proposing relay mechanism underlying enhanced Furthermore, catalyst is ability scavenge inhibit its destructive effects Additionally, liquid Al – air batteries equipped with display higher power density. This work proffers an innovative vista for conception refinement multi‐active‐site excellent performance prolonged lifespan.

Language: Английский

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Highly efficient reduction of Cr(VI) from industries sewage using novel biomass-driven carbon dots modified TiO2 under sunlight

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 500, P. 157480 - 157480

Published: Nov. 1, 2024

Language: Английский

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Synergistic regulation of different coordination shells of iron centers by sulfur and phosphorus enables efficient oxygen reduction in zinc-air batteries

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 688, P. 161 - 171

Published: Feb. 20, 2025

Language: Английский

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Design and Application of Flower-like Iron Single-Atom Nanozymes for Sensitive Colorimetric Detection of Caffeic Acid

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

Language: Английский

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Orderly Stacked “Tile” Architecture with Single‐Atom Iron Boosts Oxygen Reduction in Liquid and Solid‐State Zn–Air Batteries

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

Published: March 23, 2025

Abstract Oxygen reduction reaction plays a crucial role in energy‐related devices. However, four‐electron transfer process involved this is usually constrained by sluggish kinetics. Single atomic (SA) Fe catalysts have attracted extensive attention due to the high atom utilization, yet impact of support architecture on accelerating has been largely overlooked. Inspired edge‐rich and ordered tile that facilitates rainwater runoff, an orderly stacked “tile” carbon with highly dispersed SA doped S prepared through morphology‐persistent conversion new metal–organic framework assembly. The catalyst exhibits higher half‐wave potential 0.91 V 0.1 M KOH, when compared Pt/C atoms lamellar carbon. This because kinetics accelerated while weakens Fe–O interaction, decreases *OH binding strength. Importantly, catalyst, working at air cathodes, powers liquid solid‐state Zn–air batteries show high‐power density remarkable stability, can effectively charge mobile phone. work not only provides effective but also highlights importance for developing advanced catalysts.

Language: Английский

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High‐Coordination Engineering of Asymmetrical Cerium Single‐Atoms for Advanced Electromagnetic Wave Absorption

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

Published: April 2, 2025

Abstract Electromagnetic wave (EMW) absorbers are critical for addressing electromagnetic pollution and enabling stealth technologies. While metal single‐atom (M‐SA) materials have shown potential EMW absorption, their dielectric performance is often constrained by symmetric low‐coordination configurations. In this study, a thiourea‐mediated pyrolysis strategy developed to construct cerium single‐atoms with asymmetric high‐coordination environments (CeN 4 O S 1.5 ). Through combination of density functional theory calculations experimental validation, it found that the Ce‐SAs can induce more metal‐nonmetal dipoles create novel nonmetal‐nonmetal compared M‐N configurations, which significantly enhance loss absorption capabilities. Additionally, CeN ‐based film exhibits 6.8 GHz effective bandwidth at mere 2.3 mm thickness, alongside excellent multifunctional properties such as flexibility, thermal insulation, flame retardancy. This work advances understanding coordination environment's impact on provides an efficient design next‐generation absorbers.

Language: Английский

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Asymmetric High-Coordination Co-NSP Single-Atom Catalysts with Tailored d-p-Orbital Electron Structure for Efficient Bifunctional Catalyst of Rechargeable Zn-Air Battery Cathodes

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: unknown, P. 124889 - 124889

Published: Nov. 1, 2024

Language: Английский

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Modulating the Local Coordination Environment of M‐N_x Single‐Atom Site for Enhanced Electrocatalytic Oxygen Reduction

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

Published: Nov. 4, 2024

Abstract Efficient, durable, and economical oxygen reduction catalysts are key for practical applications such as fuel cells metal–air batteries. Single atom (SACs) have attracted sustained widespread attention owing to their unique electronic properties exceptional atomic utilization, positioning them promising electrocatalysts in energy conversion storage. However, the symmetric charge distribution of metal site M‐N 4 configuration SACs is not conducive electron transfer transport electrocatalytic reactions, resulting a low adsorption reaction (ORR) related species (*OH, *O, *OOH), which severely limits intrinsic activity electrocatalysts. To overcome this limitation improve durability, heteroatom doping can effectively modulate local coordination environment (LCE) atom, including coordinating atoms, shells number. These modifications significantly improved performance carbon supported with ORR. Based on this, thorough summary major progress made recent years adjusting LCE through heteroatoms provided perspective future development offered here.

Language: Английский

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Fe/Mo bimetallic synergy system for ultra-highly efficient degradation of Rhodamine B

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 357, P. 130146 - 130146

Published: Oct. 19, 2024

Language: Английский

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