Efficient Catalysis for Zinc–Air Batteries by Multiwalled Carbon Nanotubes‐Crosslinked Carbon Dodecahedra Embedded with Co–Fe Nanoparticles

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 10, 2025

Abstract The design and fabrication of nanocatalysts with high accessibility sintering resistance remain significant challenges in heterogeneous electrocatalysis. Herein, a novel catalyst is introduced that combines electronic pumping alloy crystal facet engineering. At the nanoscale, pump leverages chemical potential difference to drive electron migration from one region another, separating transferring electron‐hole pairs. This mechanism accelerates reaction kinetics improves rate. interface structure optimization enables CoFe/carbon nanotube (CNT) exhibit outstanding oxygen reduction (ORR) evolution (OER) performance. Specifically, this achieves an ORR half‐wave (E₁/₂) 0.895 V, outperforming standard Pt/C RuO₂ electrocatalysts terms both specific activity stability. It also demonstrates excellent electrochemical performance for OER, overpotential only 287 mV at current density 10 mA cm⁻ 2 . Theoretical calculations reveal carefully designed facets reduce energy barrier rate‐determining steps optimizing O₂ adsorption promoting capture process. study highlights developing cost‐effective bifunctional ORR–OER electrocatalysts, offering promising strategy advancing Zn–air battery technology.

Язык: Английский

---

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

---

Pumping Electrons from Oxygen-Bridged Cobalt for Low-Charging-Voltage Zn-Air Batteries

Nano Letters, Год журнала: 2024, Номер 24(43), С. 13653 - 13661

Опубликована: Окт. 21, 2024

Reducing the charging voltage is a prerequisite for improving chargeability and energy efficiency of Zn-air batteries (ZABs). Herein, Fe

Язык: Английский

---

Molten Salt‐Assisted Synthesis of Catalysts for Energy Conversion

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 9, 2024

Abstract A breakthrough in manufacturing procedures often enables people to obtain the desired functional materials. For field of energy conversion, designing and constructing catalysts with high cost‐effectiveness is urgently needed for commercial requirements. Herein, molten salt‐assisted synthesis (MSAS) strategy emphasized, which combines advantages traditional solid liquid phase catalysts. It not only provides sufficient kinetic accessibility, but effectively controls size, morphology, crystal plane features product, thus possessing promising application prospects. Specifically, selection role salt system, as well mechanism assistance are analyzed depth. Then, creation catalyst by MSAS electrochemical conversion related introduced detail. Finally, key problems countermeasures faced breakthroughs discussed look forward future. Undoubtedly, this systematical review insights here will promote comprehensive understanding further stimulate generation new efficiency

Язык: Английский

---

Heteroatom Immobilization Engineering toward High-Performance Metal Anodes

ACS Nano, Год журнала: 2024, Номер unknown

Опубликована: Сен. 11, 2024

Heteroatom immobilization engineering (HAIE) is becoming a forefront approach in materials science and engineering, focusing on the precise control manipulation of atomic-level interactions within heterogeneous systems. HAIE has emerged as an efficient strategy to fabricate single-atom sites for enhancing performance metal-based batteries. Despite significant progress achieved through metal anodes batteries, several critical challenges such dendrites, side reactions, sluggish reaction kinetics are still present. In this review, we delve into fundamental principles underlying heteroatom anodes, aiming elucidate its role electrochemical We systematically investigate how facilitates uniform nucleation inhibits reactions at anode-electrolyte interface, promoting desolvation ions accelerating Finally, discuss various strategies implementing electrode materials, high-temperature pyrolysis, vacancy reduction, molten-salt etching anchoring. These include selecting appropriate heteroatoms, optimizing methods, constructing material architectures. They can be utilized further refine enhance capabilities facilitate widespread application next-generation battery technologies.

Язык: Английский

---

Unraveling Dynamic Structural Evolution of Single Atom Catalyst via In Situ Surface-Enhanced Infrared Absorption Spectroscopy

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Март 7, 2025

Metal–nitrogen-carbon (M–N-C) single-atom catalysts (SACs) have been widely applied in catalyzing electrochemical redox reactions. However, their long-term catalytic stabilities greatly limit practical applications. This work investigates the dynamic evolution of two model Cu–N–C SACs with different Cu–N coordinations, namely Cu1/Npyri-C and Cu1/Npyrr-C, CO reduction reaction (CORR), based on a collection situ characterizations including attenuated total reflectance surface-enhanced infrared absorption spectroscopy, X-ray quasi-in electron paramagnetic resonance spectroscopy ultraviolet–visible complemented by theoretical calculations. Our findings reveal that Cu nanoparticle formation rate over Cu1/Npyrr-C is more than 6 times higher during CORR. Quasi-in UV–vis measurements demonstrate hydrogen radicals can be produced CORR, which will attack bonds SACs, causing leaching Cu2+ followed subsequent to form nanoparticles. Kinetic calculations show displays better stability resulting from stronger Cu–Npyri bonds. study deepens understanding deactivation mechanism reactions provides guidance for design next-generation enhanced durability.

Язык: Английский

---

Spin effects in electrocatalysis: Mechanisms, catalyst engineering, modulation, and applications

Materials Science and Engineering R Reports, Год журнала: 2025, Номер 164, С. 100967 - 100967

Опубликована: Март 5, 2025

Язык: Английский

---

Engineering the Active Sites of MOF‐derived Catalysts: From Oxygen Activation to Activate Metal‐Air Batteries^†

Chinese Journal of Chemistry, Год журнала: 2024, Номер 42(20), С. 2520 - 2535

Опубликована: Июнь 19, 2024

Comprehensive Summary The electrochemical processes of oxygen reduction reaction (ORR) and evolution (OER) play a crucial role in various energy storage conversion systems. However, the inherently slow kinetics reversible reactions present an urgent demand for development efficient electrocatalysts. Recently, metal‐organic framework (MOF) derivatives have attracted extensive attention electrocatalysis research due to their unique porous structure, abundant active sites, tunable structural properties. Especially, optimization electronic structure sites MOF has been proven as effective strategy enhance catalytic activity. In this review, we provide overview strategies advanced catalysts O—O bond activation reactions, including construction synergistic effects between multiple heterogeneous interfaces, utilization metal support interactions, precise modulation organic ligands surrounding at atomic level. Furthermore, review offers theoretical insights into mechanisms derivatives, well identification sites. Finally, potential challenges prospects are discussed. This contributes understanding advancement Key Scientists

Язык: Английский

---

Tailoring asymmetric atomic strain of FeN4 sites for enhanced acidic oxygen reduction reaction

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160174 - 160174

Опубликована: Фев. 1, 2025

Язык: Английский

---

Orbital hybridizations in single-atom catalysts for electrocatalysis

Science Bulletin, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

---