Efficient trifunctional electrocatalysts with iron single atoms electronically coupled with adjacent ruthenium nanoclusters for zinc-air battery-powered water splitting

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: 368, P. 125127 - 125127

Published: Feb. 4, 2025

Language: Английский

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Strong Metal‐Support Interactions in Heterogeneous Oxygen Electrocatalysis

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

Published: Oct. 26, 2024

Molecular oxygen redox electrocatalysis involves reduction and evolution as core reactions in various energy conversion environmental technology fields. Strong metal-support interactions (SMSIs) based nanomaterials are regarded desirable state-of-the-art heterogeneous electrocatalysts due to their exceptional physicochemical properties. Over the past decades, considerable advancements theory experiment have been achieved related studies, especially modulating electronic structure geometrical configuration of SMSIs enable activity, selectivity, stability. In this focuses on concept SMSI, explore manifestations mechanisms action, summarizes recent advances for efficient applications. Additionally, correlation between properties different metals supports is systematically elucidated, potential structure-activity relationships catalytic performance outlined through theoretical models. Finally, obstacles confronting burgeoning field comprehensively concluded, targeted recommendations coping strategies proposed, future research perspectives outlined.

Language: Английский

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High-Density Iron–Nickel Dual Sites in Carbon Aerogels as Effective Alkaline Water/Seawater Oxidation Electrocatalysts

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: 13(1), P. 311 - 320

Published: Jan. 3, 2025

Carbon-based nanocomposites with atomically dispersed transition metals have been found to exhibit excellent electrocatalytic activity toward the oxygen evolution reaction (OER). Yet, low metal loads and severe electrooxidation of carbon greatly limit stability. Reducing pyrolysis temperature can weaken aggregation atoms, using aerogel as a 3D scaffold maximize accessible sites. Simultaneously, lower provide higher content for substrate enhance resistance against electrooxidation. Herein, aerogels embedded Fe–Ni dual atom centers (NCA/FeNi-500) are synthesized by controlled at 500 °C chitosan hydrogel composite along FeCl3 NiCl2. With an loading 4.35 wt %, NCA/FeNi-500 exhibits remarkable OER catalytic in both alkaline water simulated seawater, featuring overpotential only +294 +306 mV reach current density 10 mA cm–2, respectively, long-term stability during overall splitting, performance much better than those commercial RuO2. First-principles calculations show that adjacent NiN4 sites effectively promote kinetics FeN4 reducing energy barrier O–O formation. This is also manifested saline splitting.

Language: Английский

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Asymmetric S Heteroatom Coordinated Dual‐Atom Catalysts and Coupled Anodic Sulfion Oxidation to Boost Electrocatalysis Oxygen Reduction

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

Published: Jan. 5, 2025

Abstract Considering the exceptional electronic regulation capability, p‐block elements can be used to regulate charge density of traditional transition metal catalysts. In this work, CoGa‐NS‐C dual‐atom catalysts (DACs) are successfully synthesized through co‐precipitation and post‐annealing treatment. The atomic dispersion Co Ga synergistic coordination structure CoN 3 S 1 GaN 4 confirmed by AC‐TEM, EXAFS, XPS. Due steric hindrance effect adsorbed * OH on site asymmetric heteroatom species, adsorption energy OOH intermediation neighboring is thus enhanced greatly, resulting in enhancement 2e‐ORR pathway. Besides, Co─OH intermediates detected situ FT‐IR EC‐SHINERS spectroscopy. A high H 2 O selectivity 90.3% a fast production rate 1.12 mol h −1 g reached. addition, cathodic oxygen reduction couple with sulfion oxidation reaction (SOR) instead energy‐intensive OER reaction. coupling system, SOR potential 1.31 V lower than process at current intensity 100 mA. Both proposed DACs strategy ORR‐SOR system beneficial for achieving efficient energy‐effective 2e‐ORR.

Language: Английский

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Functional additives for proton exchange membrane fuel cells

EnergyChem, Journal Year: 2025, Volume and Issue: unknown, P. 100144 - 100144

Published: Jan. 1, 2025

Language: Английский

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Cobalt nanoclusters promoted coordination-field enhancement of manganese single atoms for robust alkaline oxygen reduction reaction

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 688, P. 540 - 547

Published: Feb. 24, 2025

Language: Английский

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Turn the Harm into A Benefit: Axial Cl Adsorption on Curved Fe‐N₄ Single Sites for Boosted Oxygen Reduction Reaction in Seawater

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

Published: Feb. 26, 2025

Abstract Seawater electrocatalysis is urgently needed for various energy storage and conversion systems. However, the adsorption of chloride ions (Cl − ) to active sites can degrade oxygen reduction reaction (ORR) activity stability, thus reducing catalytic performance. In this paper, a curved FeN 4 single atomic structure designed by utilizing curvature engineering, which turns harmful Cl into benefit on Fe site that changes rate determining step ORR reduces overall barrier according density functional theory (DFT) calculation. Experimental studies reveal prepared highly‐curved single‐atom iron catalyst (HC‐Fe SA exhibits excellent in different electrolytes, with half‐wave potentials 0.90 V 0.1 M KOH, simulated seawater, 0.75 natural respectively. This work opens up an avenue synthesis high‐performance seawater‐based catalysts through regulating local curvature.

Language: Английский

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Triggering Synergistic Electronic Effect via Electron‐Directed Transfer within Pt_NPs‐Fe/NC Oxygen Reduction Catalyst for Zinc‐Air Batteries

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

Published: Feb. 28, 2025

Abstract Rationally tuning Fe‐N‐C catalysts with synergistic nanoparticles for efficient oxygen reduction reaction (ORR) still remains challenging. Here, a nitrogen‐doped carbon‐supported bimetallic catalyst (Pt NPs ‐Fe/NC), combining atomically dispersed sites Pt nanoparticles, is synthesized. Experimental results reveal directional electron transfer between and Fe sites, which induces an effect, effectively modulating the density around sites. The modulation significantly enhances ORR catalytic activity of ‐Fe/NC. As result, ‐Fe/NC displays half‐wave potential 0.901 V (versus RHE) Tafel slope 59 mV dec −1 , surpassing performance commercial Pt/C demonstrating accelerated kinetics. In meantime, maintains excellent durability in terms stability as well. When assembled into liquid zinc‐air batteries (ZABs), delivers peak power 201.48 mW cm −2 specific capacity 809 mAh g . Additionally, ‐Fe/NC‐based flexible ZABs display outstanding discharge cycling stability. This work highlights effectiveness multiscale advancing provides valuable insights construction strategies energy storage applications.

Language: Английский

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Biological Neural Network‐Inspired Micro/Nano‐Fibrous Carbon Aerogel for Coupling Fe Atomic Clusters With Fe‐N₄ Single Atoms to Enhance Oxygen Reduction Reaction

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

Published: March 5, 2025

Nitrogen-coordinated metal single atoms catalysts, especially with M-N4 configuration confined within the carbon matrix, emerge as a frontier of electrocatalytic research for enhancing sluggish kinetics oxygen reduction reaction (ORR). Nevertheless, due to highly planar D4h symmetry in M-N4, their adsorption behavior toward intermediates is limited, undesirably elevating energy barriers associated ORR. Moreover, structural engineering substrate also poses significant challenges. Herein, inspired by biological neural network (BNN), reticular nervous system high-speed signal processing and transmitting, comprehensive biomimetic strategy proposed tailoring Fe-N4 (Fe SAs) coupled Fe atomic clusters ACs) active sites, which are anchored onto chitosan microfibers/nanofibers-based aerogel (CMNCA-FeSA+AC) continuous conductive channels an oriented porous architecture. Theoretical analysis reveals synergistic effect SAs ACs optimizing electronic structures expediting The ingenious will shed light on topology optimization efficient electrocatalysts advanced electrochemical conversion devices.

Language: Английский

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Cascade Hydrogen Peroxide Reduction Reaction Endows Cu‐Fe Dual‐Atom Catalyst with Durable Oxygen Reduction Performance

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

Published: March 27, 2025

Abstract Durable problems caused by the attack from free radicals are considered as Achilles’ heel in practical applications for oxygen reduction reaction (ORR) acidic conditions. Herein, a ligand‐bridging strategy is proposed to design Cu─Fe dual‐atom catalyst (CuFeDAC‐NC) relieve undesirable degradation radicals. Comprehensive investigations and theoretical calculations verify that byproduct of hydrogen peroxide can be effectively eliminated at neighboring Cu sites through cascade catalytic process, formation oxidative suppressed, leading enhanced durability. Meanwhile, synergistic effect between site Fe results superior ORR performance. CuFeDAC‐NC delivers half‐wave potential ( E 1/2 ) 0.811 V 0.1 M HClO 4 electrolyte exhibits excellent durability with small loss 12 mV after 10 000 cycles Fe─NC (34 mV). This work not only provides new perspective get insight into mechanisms but also opens an avenue catalysts

Language: Английский

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