Relay Catalysis of Fe and Co with Multi‐Active Sites for Specialized Division of Labor in Electrocatalytic Nitrate Reduction Reaction

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

Published: April 8, 2024

Abstract Electrocatalytic nitrate reduction reaction (NO 3 RR) driven by renewable energy is a promising technology for the removal of nitrate‐containing wastewater. However, sluggish kinetics resulted from complex proton‐coupled electron transfer and various intermediates remain key barriers large‐scale application NO RR. Herein, tactic reported to raise rate RR increase selectivity N 2 using bimetal catalyst: Co inclined act on steps needed in process, rate‐determining step (RDS: *NO , asterisk means intermediates) subsequent *N hydrogenation as well Fe exhibits efficient activity selectivity‐ determining (SDS: then ) via relay catalysis mechanism. A efficiency 78.5% an ultra‐long cycle stability 60 cycles (12 h per cycle) are achieved FeCo alloy confined with nitrogen‐doped porous carbon nanofibers (FeCo‐NPCNFs). DFT calculations unveil that introduction active site not only regulates d‐band center alloy, optimizes adsorption intermediates, but also has strong capacity supply hydrogen species. Clearly, this study elucidates effects bimetallic performance electrocatalytic offers avenues designing Fe‐based catalysts realize nitrogen‐neutral cycle.

Language: Английский

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A Simultaneous Modulation Strategy to Construct High Dense and Accessible Co‐N₄ Sites for Promoting Oxygen Reduction Reaction in Zn–Air Battery

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: April 25, 2024

Abstract Transition metal‐nitrogen‐carbon single‐atom catalysts (M─N─C SACs) exhibit outstanding catalytic activity for the oxygen reduction reaction (ORR). However, these still face dual challenges of low density and utilization active sites in practical applications. Hence, a simultaneous modulation strategy to construct high‐density accessible Co‐N 4 on nitrogen‐doped porous carbon (Co H SA/NC), is reported. As expected, optimized Co SA/NC catalyst exhibits superior ORR with half‐wave potential value 0.874 V, outperforming that benchmark Pt/C catalyst. Importantly, mass turnover frequency are 14.7 13.3 times higher than low‐density single atom L respectively. Structural characterization functional theory (DFT) reveal structure high dense synergistically improve performance, which induced redistribution d orbital, resulting z 2 orbital has enough electron interact OOH * specie, thereby facilitating kinetic process ORR. Moreover, SA/NC‐based Zn–Air Battery (ZAB) also showed excellent device including high‐power (191.7 mW cm −2 ), specific capacity, stability (250 h), significantly Pt/C‐based ZABs.

Language: Английский

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Building synergistic multiple active sites in branch-leaf nanostructured carbon nanofiber derived from MOF/COF hybrid for flexible wearable Zn-air battery

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 666, P. 35 - 46

Published: April 4, 2024

Language: Английский

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Promoting Electrocatalytic Oxygen Reactions Using Advanced Heterostructures for Rechargeable Zinc–Air Battery Applications

ACS Nano, Journal Year: 2024, Volume and Issue: 18(33), P. 21651 - 21684

Published: Aug. 12, 2024

In order to facilitate electrochemical oxygen reactions in electrically rechargeable zinc-air batteries (ZABs), there is a need develop innovative approaches for efficient electrocatalysts. Due their reliability, high energy density, material abundance, and ecofriendliness, ZABs hold promise as next-generation storage conversion devices. However, the large-scale application of currently hindered by slow kinetics reduction reaction (ORR) evolution (OER). development heterostructure-based electrocatalysts has potential surpass limitations imposed intrinsic properties single material. This Account begins with an explanation configurations fundamentals electrochemistry air electrode. Then, we summarize recent progress respect variety heterostructures that exploit bifunctional electrocatalytic overview impact on ZAB performance. The range heterointerfacial engineering strategies improving ORR/OER performance includes tailoring surface chemistry, dimensionality catalysts, interfacial charge transfer, mass transport, morphology. We highlight multicomponent design take these features into account create advanced highly active catalysts. Finally, discuss challenges future perspectives this important topic aim enhance activity batteries.

Language: Английский

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Mo2N nanoclusters and FeMo dual atomic active sites confined in N-doped hollow carbon nanocages for synergistic improvement in oxygen reduction and Zn-air battery

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160442 - 160442

Published: Feb. 1, 2025

Language: Английский

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Biphase Alloy Nanoheterojunction Encapsulated within N‐Doped Carbon Nanotubes as Bifunctional Oxygen Electrocatalyst for High‐Performance Zn‐Air and Mg‐Air Batteries

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

Published: Jan. 10, 2025

Abstract N‐doped carbon confined alloy catalysts possess considerable potential in facilitating oxygen electrocatalytic reaction and consequent applications metal air batteries, but the sluggish catalytic kinetics high barrier of reduction (ORR) remain bottleneck restricting its further development. Here, a novel CoFe‐NiFe biphase nanoheterojunction encapsulated within nanotubes (CoFe‐NiFe@NCNT) is fabricated via hydrothermal carbothermic approach. Owing to plentiful active sites electrical conductance, difference between OER ORR amounts merely 0.68 V. Simultaneously, performance Zn‐air Mg‐air batteries assembled by CoFe‐NiFe@NCNT serving as air‐cathode are superior that commercial Pt/C + RuO 2 . The DFT outcomes reveal transformation *OOH *O rate‐determining step (RDS) ORR/OER. Also, synergy heterojunction conducive reduce energy barrier. This study offers profound understanding toward structural design electrocatalysts utilization metal‐air for portable wearable electronic apparatuses.

Language: Английский

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Single-atom sites combined with metal nano-aggregates for efficient electrocatalysis

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(12), P. 5663 - 5687

Published: Jan. 1, 2023

This review summarizes recent progress and prospects of catalysts containing metal single-atom (M 1 ) nano-aggregates (MNAs, particles or clusters), which promise to combine the merits SACs MNA-based for efficient electrocatalysis.

Language: Английский

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Regulating the electronic state of SnO2@NiFe-LDH heterojunction: Activating lattice oxygen for efficient oxygen evolution reaction

Fuel, Journal Year: 2024, Volume and Issue: 370, P. 131762 - 131762

Published: May 4, 2024

Language: Английский

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Charge-asymmetry Fe1Cu single-atom alloy catalyst for efficient oxygen reduction reaction

Nano Research, Journal Year: 2024, Volume and Issue: 17(6), P. 4702 - 4710

Published: Feb. 23, 2024

Language: Английский

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Recent advances in the development of single atom catalysts for oxygen evolution reaction

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 82, P. 1081 - 1100

Published: Aug. 9, 2024

Language: Английский

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