Recent advances in noble metal-free electrocatalysts to achieve efficient alkaline water splitting

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(20), С. 11771 - 11820

Опубликована: Янв. 1, 2024

Electrochemical water splitting is one of the promising approaches for generating hydrogen.

Язык: 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, Год журнала: 2025, Номер unknown

Опубликована: Янв. 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.

Язык: Английский

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Harnessing Multi‐Asymmetric Engineering: A New Horizon in Bifunctional Oxygen Electrocatalysis with Iron‐Group Atom‐Cluster Nanohybrid

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 27, 2024

Abstract Integrating active sites for oxygen reduction and evolution reactions (ORR OER) is pivotal advancing bifunctional electrodes. Addressing the geometric/electronic properties of these essential to disrupt linear scaling relationship between adsorption desorption complex intermediates. Herein, a proof‐of‐concept presented constructing asymmetric trinuclear employing both composition‐ size‐based coupling strategies. These comprise ORR‐active Fe single atom (Fe SA ), OER‐active atomically clustered species AC Ni as modulators. This AC‐SA ‐Ni @N‐doped carbon exhibits excellent catalytic activities, with narrow potential gap 0.661 V an ORR half‐wave 0.931 OER 1.592 at 10 mA cm −2 . The Zn‐air battery this material achieves peak power density 293 mW , specific capacity 748 mAh g Zn −1 remarkable stability. Experimental findings theoretical simulations reveal that induced strong electronic among centers, facilitating charge redistribution optimizing barriers enhances rapid release * OH during efficient transformation from O OOH OER. study presents novel strategy developing robust

Язык: Английский

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Lattice Oxygen Redox Dynamics in Zeolite‐Encapsulated CsPbBr₃ Perovskite OER Electrocatalysts

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 9, 2025

Abstract Understanding the oxygen evolution reaction (OER) mechanism is pivotal for improving overall efficiency of water electrolysis. Despite methylammonium lead halide perovskites (MAPbX 3 ) have shown promising OER performance due to their soft‐lattice nature that allows lattice‐oxygen oxidation active α‐PbO 2 layer surface, role A‐site MA or X‐site elements in electrochemical reconstruction and mechanisms has yet be explored. Here, it demonstrated perovskite@zeolite composites intrinsically dominated by group lead‐halide perovskites, while type halogen crucial kinetics composites. Using CsPbBr x I 3‐ @AlPO‐5 ( = 0, 1, 2, 3) as a model catalyst, found behaves oxygen‐intercalation pseudocapacitance during surface restructuring absence halogen‐ion migration phase separation , achieving larger diffusion rate OH − within core‐shell structure. Moreover, distinct from single‐metal‐site MAPbBr @AlPO‐5, experimental theoretical investigations reveal soft lattice triggers oxygen‐vacancy‐site via /α‐PbO interface, resulting excellent performance. Owing variety easy tailoring perovskite compositions, these findings pave way development novel catalysts efficient electrocatalysis.

Язык: Английский

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Tailoring microenvironment for efficient CO2 electroreduction through nanoconfinement strategy

Nano Research, Год журнала: 2024, Номер 17(9), С. 7880 - 7899

Опубликована: Авг. 7, 2024

Язык: Английский

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Collaborative Interface Optimization Strategy Guided Fe3C/MnO-NC Electrocatalysts for Rechargeable Flexible Zinc-Air Batteries

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер unknown, С. 124615 - 124615

Опубликована: Сен. 1, 2024

Язык: Английский

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A(CoFe)(S2)2/CoFe heterostructure constructed in S, N co-doped carbon nanotubes as an efficient oxygen electrocatalyst for zinc-air battery

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 679, С. 75 - 89

Опубликована: Сен. 28, 2024

Язык: Английский

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Synthesis and Utilization of MXene/MOF Hybrid Composite Materials

Chemical Research in Chinese Universities, Год журнала: 2024, Номер unknown

Опубликована: Окт. 2, 2024

Язык: Английский

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Decrypting Synergy of Alloy & Metal Nanoparticles Within Nitrogen‐Doped Carbon Nanosheets for Zn‐Air Batteries with Ultralong Cycling Stability

Small Methods, Год журнала: 2024, Номер unknown

Опубликована: Окт. 23, 2024

Abstract The exploration of efficient, robust, and low‐cost bifunctional electrocatalysts to drive the commercial application Zn‐air batteries (ZABs) is great significance but still remains a challenge. Herein, 1D coordination polymer (1D‐CP) derived FeNi alloy & Co nanoparticles (NPs) co‐implanted N‐doped carbon nanosheets (FNC/NCS) judiciously crafted employed as high‐performance electrocatalyst for ultralong lifetime ZABs. key this strategy leveraging metal‐coordinated melamine direct pyrolysis 1D‐CP, enabling in situ formation well‐dispersed NPs within matrix. resulting FNC/NCS exhibits prominent oxygen reduction reaction (ORR) evolution (OER) activity with small overall potential difference (ΔE = 0.68 V). Density functional theory (DFT) simulation demonstrates that synergistic effect between can reduce energy barriers, promote electron transfer, optimize crucial intermediates, thereby largely boost ORR/OER FNC/NCS. FNC/NCS‐assembled ZABs possess high specific capacity, large power density, cycling life both aqueous (> 3300 h) solid‐state (150 electrolytes. This work provides viable 1D‐CP‐derived dissects different metal species, affording significant guidance development renewable materials.

Язык: Английский

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General design of self-supported Co-Ni/nitrogen-doped carbon nanotubes array for efficient oxygen evolution reaction

Journal of Colloid and Interface Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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