Work Function‐Guided Electrocatalyst Design

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(29)

Published: April 29, 2024

Abstract The development of high‐performance electrocatalysts for energy conversion reactions is crucial advancing global sustainability. design catalysts based on their electronic properties (e.g., work function) has gained significant attention recently. Although numerous reviews electrocatalysis have been provided, no such reports function‐guided electrocatalyst are available. Herein, a comprehensive summary the latest advancements in diverse electrochemical applications provided. This includes function‐based catalytic activity descriptors, and both monolithic heterostructural catalysts. measurement function first discussed descriptors various fully analyzed. Subsequently, function‐regulated material‐electrolyte interfacial electron transfer (IET) employed catalyst design, methods regulating optimizing performance discussed. In addition, key strategies tuning function‐governed material‐material IET examined. Finally, perspectives determination, put forward to guide future research. paves way rational efficient sustainable applications.

Language: Английский

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Pyridine N‐Modulated Adsorption Equilibrium of Highly Dispersed Atomic W‐P Clusters toward Advanced Potassium‐Ion Hybrid Capacitors

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(23)

Published: March 22, 2024

Abstract Improving the atomic utilization of storage sites and developing isotropic transport characteristics become crucial to enhance performance potassium‐ion hybrid capacitors (PIHCs), disordered strategy coordination modulation electrodes can satisfy above structure‐activity requirements. Herein, highly dispersed W‐P clusters are chosen as a platform for electronic restructuring. Studies calculations indicate that replacing O in W‐O 2 /P with pyridine N modulate electron distribution electronegativity, enrich edge‐dangling bonds amorphous (W‐N ), resulting proper adsorption equilibrium high affinity K + storage. In addition, have bulk‐phase‐indifferent fast ion storage, situ protection carbon nanosheets provide stable support transfer clusters. As an anode, composite (W‐N/P@C) exhibits superior properties (reversible capacity 181.6 mAh g −1 after 3000 cycles at 5.0 A energy density (163.7 Wh Kg ) high‐power output (3500 W PIHCs. This work systematically delineates effects design N‐coordination on provides new research ideas studying high‐performance

Language: Английский

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Biomass Solid‐State Electrolyte with Abundant Ion and Water Channels for Flexible Zinc–Air Batteries

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(29)

Published: April 3, 2024

Abstract Flexible zinc–air batteries are the leading candidates as next‐generation power source for flexible/wearable electronics. However, constructing safe and high‐performance solid‐state electrolytes (SSEs) with intrinsic hydroxide ion (OH − ) conduction remains a fundamental challenge. Herein, by adopting natural robust cellulose nanofibers (CNFs) building blocks, biomass SSEs penetrating water channels constructed knitting OH ‐conductive CNFs water‐retentive together via an energy‐efficient tape casting. Benefiting from abundant interconnected hydrated wires fast under nanoconfined environment, reveal high water‐uptake, impressive conductivity of 175 mS cm −1 mechanical robustness simultaneously, which overcomes commonly existed dilemma between property. Remarkably, flexible assemble deliver exceptional cycle lifespan 310 h density 126 mW −2 . The design methodology opens new avenue to batteries.

Language: Английский

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Boosting Oxygen Reduction Reaction Performance of Fe Single‐Atom Catalysts Via Precise Control of the Coordination Environment

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

Published: March 3, 2025

Abstract Fe single‐atom on N‐doped carbon (FeN‐C) catalysts emerge as promising alternatives to commercial Pt/C for the oxygen reduction reaction. Heterogeneous atom doping is proposed be effective modulating catalyst performance. Despite this, relationship between fine coordination structure of doped atoms and catalytic activity central metal site remains poorly understood. Herein, with S in either first shell (FeSN–C) or second (FeN–SC) active are synthesized compare effects different structure. FeN–SC exhibits prominent performance a half‐wave potential 0.92 V rotating disk electrode peak power density 251 mW cm −2 zinc–air battery. Theoretical studies reveal that effectively modulates electronic charge transfer at center. Compared directly coordinated within shell, located more optimizing adsorption desorption energy barriers oxygen‐containing intermediates sites. This study provides new strategy adjust by engineering multilayer center catalyst.

Language: Английский

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Fe─N₄ and Fe₇Co₃ Nanoalloy Dual‐Site Modulation by Skeleton Defect in N‐Doped Graphene Aerogel for Enhanced Bifunctional Oxygen Electrocatalyst in Zinc‐air Battery

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

Published: Jan. 2, 2025

Abstract The dual‐site electrocatalysts formed by metal single atoms combines with nanoparticles represent a promising strategy to enhance both oxygen reduction reaction (ORR) and evolution (OER) performance. Herein, defect engineering is applied ORR OER electrocatalysts. Its design, synthesis, structural properties, catalytic performance experimentally theoretically are insightfully studied for the single‐atomic Fe─N 4 adjacent Fe 7 Co 3 nanoalloy (FeCo NA ) as loading on nitrogen‐doped graphene aerogel (Fe─N/FeCo@NGA). high‐density dual‐sites, together good electronic conductivity of NGA, synergistically improve structure superior electrocatalytic activity. half‐wave potential Fe─N/FeCo@NGA in 0.92 V overpotential it 1.58 V. Corresponding all‐solid‐state Zn‐air battery demonstrates peak power density 147.6 mW cm −2 charge/discharge durability over 140 h. Theoretical calculations reveal that Fe‐N FeCo skeleton optimized further refine local structure, modulating tensile force O─O bond * OOH intermediate, leading its spontaneous dissociation facilitating significantly reduced energy barrier. This work takes shortcut application development highly efficient bifunctional atoms.

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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Applications of diamond films: a review

Functional Diamond, Journal Year: 2024, Volume and Issue: 4(1)

Published: Oct. 1, 2024

Ever since methods to deposit diamond in the form of thin films by chemical vapour deposition (CVD) were developed 1990s, an astonishing variety applications for this material has emerged. Indeed, number and diversity CVD are now so large that they merit a dedicated review their own right, providing comprehensive account huge reported date. This discusses mechanical applications, as well electrochemistry, high-power electronic devices, quantum technology, thermal management, electron-emission composite materials, optics, radiation detectors, X-ray lenses, dosimeters, biomedical anvil cells, nuclear fusion betavoltaic batteries. Some nanodiamond particles also reviewed.

Language: Английский

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Tetramethylguanidine‐Modified Graphene Oxide as a Gel Polymer Electrolyte Additive for Improving the Performance of Flexible Zinc‐Air Batteries

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

Published: Jan. 9, 2025

Abstract Flexible zinc‐air batteries (FZABs) present a promising solution for the next generation of power sources in wearable electronics, owing to their high energy density, cost‐effectiveness, and safety. However, solid‐state electrolytes FZABs continue face challenges related rapid water loss low ionic conductivity. In this study, hydrophilic stable tetramethylguanidine‐modified graphene oxide as an additive, which is incorporated into sodium polyacrylate develop high‐performance gel polymer electrolyte (GPE), designed. The addition additives makes GPE more hydrophilic, allowing wider hydrogen bonding network efficient ion transport channels. Due its structure, abundant channels fast OH − conductivity, also offers excellent mechanical properties, long‐lasting retention, conductivity (173.9 mS cm −1 ). assembled with exhibit open‐circuit voltage 1.558 V, cycle life 230 h, specific capacity 810.3 mAh g , peak density 130.5 mW −2 coupled impressive flexibility. These characteristics underscore significant potential applications electronics.

Language: Английский

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Advanced Direct Recycling Technology Enables a Second Life of Spent Lithium-ion Battery

Energy storage materials, Journal Year: 2024, Volume and Issue: unknown, P. 103964 - 103964

Published: Dec. 1, 2024

Language: Английский

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p-Block anion compressed d/p band center of bifunctional oxygen electrocatalysts for durable aqueous Zn–air batteries

Energy storage materials, Journal Year: 2024, Volume and Issue: 71, P. 103654 - 103654

Published: July 18, 2024

Language: Английский

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