Recent Progress of Amorphous Nanomaterials

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(13), P. 8859 - 8941

Published: June 26, 2023

Amorphous materials are metastable solids with only short-range order at the atomic scale, which results from local intermolecular chemical bonding. The lack of long-range typical crystals endows amorphous nanomaterials unconventional and intriguing structural features, such as isotropic environments, abundant surface dangling bonds, highly unsaturated coordination, etc. Because these features ensuing modulation in electronic properties, display potential for practical applications different areas. Motivated by elements, here we provide an overview unique general synthetic methods, covered contemporary research nanomaterials. Furthermore, discussed possible theoretical mechanism nanomaterials, examining how properties configurations contribute to their exceptional performance. In particular, benefits well enhanced electrocatalytic, optical, mechanical thereby clarifying structure–function relationships, highlighted. Finally, a perspective on preparation utilization establish mature systems superior hierarchy various is introduced, outlook future challenges opportunities frontiers this rapidly advancing field proposed.

Language: Английский

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Atomic ruthenium doping in collaboration with oxygen vacancy engineering boosts the hydrogen evolution reaction by optimizing H absorption

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 480, P. 148007 - 148007

Published: Dec. 9, 2023

Language: Английский

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The synthesis and application of crystalline–amorphous hybrid materials

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 53(2), P. 684 - 713

Published: Dec. 20, 2023

Crystalline-amorphous hybrid materials (CA-HMs) possess the merits of both pure crystalline and amorphous phases. Abundant dangling bonds, unsaturated coordination atoms, isotropic structural features in phase, as well relatively high electronic conductivity thermodynamic stability phase simultaneously take effect CA-HMs. Furthermore, atomic bandgap mismatch at CA-HM interface can introduce more defects extra active sites, reservoirs for promoted catalytic electrochemical performance, induce built-in electric field facile charge carrier transport. Motivated by these intriguing features, herein, we provide a comprehensive overview CA-HMs on various aspects-from synthetic methods to multiple applications. Typical characteristics are discussed beginning, followed representative strategies CA-HMs, including hydrothermal/solvothermal methods, deposition techniques, thermal adjustment, templating methods. Diverse applications such electrocatalysis, batteries, supercapacitors, mechanics, optoelectronics, thermoelectrics along with underlying structure-property mechanisms carefully elucidated. Finally, challenges perspectives proposed an aim insights into future development

Language: Английский

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Phase Engineering of Nanostructural Metallic Materials: Classification, Structures, and Applications

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(3), P. 1247 - 1287

Published: Jan. 23, 2024

Metallic materials are usually composed of single phase or multiple phases, which refers to homogeneous regions with distinct types the atom arrangement. The recent studies on nanostructured metallic provide a variety promising approaches engineer phases at nanoscale. Tailoring size, distribution, and introducing new structures via transformation contribute precise modification in deformation behaviors electronic nanostructural materials. Therefore, engineering is expected pave an innovative way develop advanced mechanical functional properties. In this review, we present comprehensive overview heterogeneous nanophases fundamental understanding nanophase formation for materials, including supra-nano-dual-phase nanoprecipitation- nanotwin-strengthened We first review thermodynamics kinetics principles structure, followed by discussion mechanism structural as well optimization structure electrocatalysis. Then, demonstrate origin, classification, properties characteristics dense nanoprecipitations nanotwins. Finally, summarize some potential research challenges field short perspective scientific implications design next-generation

Language: Английский

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Tailoring Nanocrystalline/Amorphous Interfaces to Enhance Oxygen Evolution Reaction Performance for FeNi‐Based Alloy Fibers

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

Published: Sept. 6, 2024

Abstract Efficient oxygen evolution reaction (OER) electrocatalysts play a pivotal role in water electrolysis, notably for industrial high current densities (>1000 mA cm −2 ). Crystalline/amorphous heterostructure interfaces have proven to be advantageous enhancing the OER activities of electrocatalytic materials. However, constructing and tailoring crystalline/amorphous still remain great challenge due destruction active substrates by intricate post‐treatment. Here, strategy tailor nanocrystalline/amorphous (N/A) interface optimize performance as‐cast N/A alloys adjusting size nanocrystals is proposed. The alloy fibers obtained based on this exhibit superior with an overpotential 227 mV (@10 ), maintaining stability over 1000, 600, 240 h under 500, 1800 , respectively. Theoretical calculations material characterizations reveal that interfaces, facilitated appropriately sized possessing loose atomic arrangement, favorable surface electronic structure, local coordination, optimal O‐contained intermediate adsorption, can yield abundant sites without compromising stability. This study not only provides deeper understanding mechanism but also offers new design perspective development cost‐effective, industrial‐grade electrocatalysts.

Language: Английский

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Recent Progress in Design Strategy of Anode for Seawater Electrolysis

Small Structures, Journal Year: 2023, Volume and Issue: 4(12)

Published: Aug. 22, 2023

Direct electrolysis of inexhaustible seawater to generate green hydrogen represents a more environment‐friendly technology relative freshwater electrolysis. However, current splitting suffers from low catalytic efficiency and poor operation stability caused by anodic competition between the oxygen evolution reaction chlorine oxidation as well severe chloride corrosion. This article provides comprehensive overview latest achievements in promoting selectivity Beginning with fundamentals anode reactions during splitting, various strategies design advanced electrocatalyst including surface selective layer engineering, structural regulation heteroatoms doping vacancies, heterostructure construction are discussed detail. Finally, conclusion challenges developing highlighted.

Language: Английский

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ZIF-derived Fe,Co coordinated N/O-codoped three-dimensional tungsten–carbon matrix for the performance-enhanced zinc-air flow battery and water splitting

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 476, P. 146502 - 146502

Published: Oct. 7, 2023

Language: Английский

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Coupling MnS and CoS Nanocrystals on Self-Supported Porous N-doped Carbon Nanofibers to Enhance Oxygen Electrocatalytic Performance for Flexible Zn-Air Batteries

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(22), P. 26766 - 26777

Published: May 29, 2023

Seeking highly efficient, stable, and cost-effective bifunctional electrocatalysts of rechargeable Zn–air batteries (ZABs) is the top-priority for developing new generation portable electronic devices. For this, rational effective structural design, interface engineering, electron recombination on should be taken into account to reduce reaction overpotential expedite kinetics oxygen reduction (ORR) evolution (OER). Herein, we construct a MnCo-based metal organic framework-derived heterogeneous MnS–CoS nanocrystals, which are anchored free-standing porous N-doped carbon fibers (PNCFs) by in situ growth method vulcanization process. Benefiting from abundant vacancies active sites, strong interfacial coupling as well favorable conductivity, MnS–CoS/PNCFs composite electrode delivers mentionable electrocatalytic activity stability with half-wave potential 0.81 V ORR an 350 mV OER alkaline medium. Of note, flexible ZAB using binder-free air cathode offers high power density 86.7 mW cm–2, large specific capacity 563 mA h g–1, adapts different bending degree operation. In addition, functional theory calculation clarifies that nanocrystals reduces barrier enhances conductivity catalyst adsorption intermediates during This study opens up insight design self-supported

Language: Английский

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Metal–Organic Frameworks Derived Carbon‐Supported Metal Electrocatalysts for Energy‐Related Reduction Reactions

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(38)

Published: June 21, 2024

Electrochemical reduction reactions, as cathodic processes in many energy-related devices, significantly impact the overall efficiency determined mainly by performance of electrocatalysts. Metal-organic frameworks (MOFs) derived carbon-supported metal materials have become one star electrocatalysts due to their tunable structure and composition through ligand design screening. However, for different electroreduction required active species vary phase component, electronic state, catalytic center configuration, hence requiring effective customization. From this perspective, review comprehensively analyzes structural principles, loading strategies, practical performance, complex mechanisms, thereby providing insights guidance future rational such catalysts.

Language: Английский

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Built‐In Electric Field Boosted Overall Water Electrolysis at Large Current Density for the Heterogeneous Ir/CoMoO₄ Nanosheet Arrays

Small, Journal Year: 2024, Volume and Issue: 20(29)

Published: Feb. 13, 2024

Advanced bifunctional electrocatalysts are essential for propelling overall water splitting (OWS) progress. Herein, relying on the obvious difference in work function of Ir (5.44 eV) and CoMoO

Language: Английский

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