Challenges and opportunities in 2D high‐entropy alloy electrocatalysts for sustainable energy conversion DOI Creative Commons

Die Lu,

Xinyao Fu,

Dong Guo

et al.

SusMat, Journal Year: 2023, Volume and Issue: 3(6), P. 730 - 748

Published: Nov. 15, 2023

Abstract Two‐dimensional (2D) high‐entropy alloys (HEAs) have emerged as promising electrocatalysts due to the benefits of polymetallic coordination and robust electrical conductivity. However, multiple elements in 2D HEAs pose challenges achieving a uniform composition maintaining limit morphology, complicating their structural characterization. Furthermore, even minor adjustments can significantly alter properties HEAs, underscoring need for deeper understanding structure–property relationships advance synthesis application. Therefore, this review critically examines intrinsic factors influencing methods practical applications electrocatalysis sustainable energy conversion. The urgency is emphasized developing new techniques, enhancing advanced characterization methods, gaining profound insights into functional mechanisms HEAs.

Language: Английский

High-entropy materials for energy and electronic applications DOI
Simon Schweidler, Miriam Botros, Florian Strauss

et al.

Nature Reviews Materials, Journal Year: 2024, Volume and Issue: 9(4), P. 266 - 281

Published: March 6, 2024

Language: Английский

Citations

153
Oxygenate-induced structural evolution of high-entropy electrocatalysts for multifunctional alcohol electrooxidation integrated with hydrogen production DOI Creative Commons
Jinfeng He, Yun Tong, Zhe Wang

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(30)

Published: July 16, 2024

High-entropy compounds have been emerging as promising candidates for electrolysis, yet their controllable electrosynthesis strategy remains a formidable challenge because of the ambiguous ionic interaction and codeposition mechanism. Herein, we report oxygenates directionally induced electrodeposition to construct high-entropy materials with amorphous features, on which structural evolution from phosphide oxide is confirmed by introducing vanadate, thus realizing simultaneous optimization composition structure. The representative P-CoNiMnWVO x shows excellent bifunctional catalytic performance toward alkaline hydrogen reaction ethanol oxidation (EOR), small potentials −168 mV 1.38 V at 100 mA cm −2 , respectively. In situ spectroscopy illustrates that electrochemical reconstruction induces abundant Co–O species main active EOR follows conversion pathway C 2 product. Theoretical calculations reveal optimized electronic structure adsorption free energy intermediates thereby resulting in facilitated kinetic process. A membrane-free electrolyzer delivers both high Faradaic efficiencies acetate H over 95% superior stability at100 during 120 h electrolysis. addition, unique advantages endow multifunctional activity realize multipathway formate-coupled production.

Language: Английский

Citations

46
Single‐Atom Immobilization Boosting Oxygen Redox Kinetics of High‐Entropy Perovskite Oxide Toward High‐Performance Lithium‐Oxygen Batteries DOI

Dayue Du,

Hanna He,

Ruixin Zheng

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(17)

Published: Jan. 17, 2024

Abstract Understanding and modulating the unique electronic interaction between single‐metal atoms high entropy compounds are of great significance to enable their high‐efficiency oxygen electrocatalysis for aprotic lithium‐oxygen (Li‐O 2 ) batteries. Herein, a novel bi‐functional electrocatalyst is first time created by immobilizing single‐atom ruthenium (Ru) on lanthanum‐based perovskite oxide La(Mn 0.2 Co Fe Ni Cr )O 3 (Ru@HEPO), which demonstrates activity stability in Li‐O The heteronuclear coordination Ru HEPO facilitates fast electron transfer from establishing Ru‐O‐M (M stands Mn, Co, Fe, Ni) bridges, well redistributes electrons within Ru@HEPO hence significantly improving its interfacial charge kinetics electrocatalytic activity. Additionally, strong coupling Mn enhances hybridization 3d O 2p orbitals, promotes inherent affinity toward LiO intermediate, thereby reducing reaction energy barrier electrode. As result, Ru@HEPO‐based batteries deliver remarkable electrochemical performances, such as efficiency (87.3% at 100 mA g −1 ), excellent rate capability (low overpotential 0.52 V durable cyclability (345 cycles 300 ). This work opens up promising avenue development entropy‐based electrocatalysts precisely tailoring distributions an atomic scale.

Language: Английский

Citations

39
A review of noble metal-free high entropy alloys for water splitting applications DOI Creative Commons
H. Denny Kamaruddin,

Zhang Jiang-hong,

Yu Liang

et al.

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(17), P. 9933 - 9961

Published: Jan. 1, 2024

Nano-sized high entropy alloy (HEA) catalysts have attracted much attention as extraordinary electrocatalysts in water-splitting applications, i.e. , the hydrogen evolution reaction (HER) and oxygen (OER).

Language: Английский

Citations

22
High-entropy oxides for energy-related electrocatalysis DOI Creative Commons
Han Cai, Peikun Zhang, Bowen Li

et al.

Materials Today Catalysis, Journal Year: 2024, Volume and Issue: 4, P. 100039 - 100039

Published: Jan. 17, 2024

Electrocatalysis plays a crucial role in the conversion and storage of renewable energy, offering significant potential for addressing energy crisis environmental concerns. High-entropy oxides (HEOs), class emerging functional materials, have gained increasing attention electrocatalysis due to their stable crystal structure, exceptional geometric compatibility, unique electronic balance factors, abundant active sites. In this comprehensive review, we present recent advancements utilizing HEOs as catalysts various energy-based electrocatalytic reactions. We begin with an overview that includes definitions, fundamental properties, theoretical investigations. Subsequently, describe different synthetic methods while highlighting two newly-developed techniques. Furthermore, extensively discuss developments HEO-based electrocatalysts diverse structures such rock-salt-type, rutile-type, spinel-type, perovskite-type, other specially-structured HEOs. Special emphasis is placed on designed strategies aimed at enhancing performance exploring correlations between structure/ composition performance. Finally, provide concluding remarks along perspectives future opportunities exciting field.

Language: Английский

Citations

19
Mesocrystallinely stabilized lithium storage in high-entropy oxides DOI
Wei Wang, Wenjun Song, Yanshuai Li

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 124, P. 109482 - 109482

Published: March 11, 2024

Language: Английский

Citations

16
Research Progress of High-Entropy Oxides as Oxygen Evolution Reaction Catalysts DOI
Qi Zhang, Junhua You, Xi Zhang

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(8), P. 6659 - 6678

Published: April 2, 2024

Equimolar or nearly molar mixtures of five more metals are used to create high-entropy oxides (HEOs). HEOs also possess the kinetic slow diffusion effect, structural lattice distortion, thermodynamic and cocktail effect. Consequently, a growing number scientists investigating oxides. High active site density, low overpotential, entropic stabilization effects main reasons why now show good electrocatalytic oxygen evolution reaction. However, complexity elemental composition, organization, surface morphology limits use HEOs. The development mechanisms behind OER reviewed in this work, along with description response pathways evaluation standards. performance diverse organizational structures is research because come variety kinds. Additionally, when utilized as carriers, trend examined. Lastly, potential future problems opportunities for HEO electrocatalysts discussed.

Language: Английский

Citations

16
Epitaxial Design of Complex Nickelates as Electrocatalysts for the Oxygen Evolution Reaction DOI Creative Commons
Min‐Ju Choi, Le Wang, Kelsey A. Stoerzinger

et al.

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(22)

Published: April 20, 2023

Abstract The oxygen evolution reaction (OER) is a crucial process in electrochemical water splitting, promising technology to renewably yield hydrogen gas from water. Designing and developing earth‐abundant, efficient, stable OER electrocatalysts replace the most widely used but scarce RuO 2 IrO are thus of critical interest. Recently, ABO 3 ‐structured perovskite oxides, especially rare‐earth nickelates, extensively studied for their potential use as electrocatalysts. In particular, epitaxial synthesis complex oxide thin films allows flexible precise control over materials so that structure–stability–property relationships can be established. Using nickelate model systems, this review illustrates how design researchers test different hypotheses proposed descriptors, well formulate new principles. Following brief introduction background mechanisms, activity methods, various strategies surveyed including strain tuning, composition control, surface termination/orientation selection, defect engineering, interface design. These have led atomic structures electronic properties nickelates which turn determine performance. Finally, remaining challenges perspectives toward deeper understanding oxides catalysts discussed.

Language: Английский

Citations

40
Coupling high entropy oxide with hollow carbon spheres by rapid microwave solvothermal strategy for boosting oxygen evolution reaction DOI
Huan He,

Pengzu Kou,

Zhigui Zhang

et al.

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 653, P. 179 - 188

Published: Sept. 9, 2023

Language: Английский

Citations

35
Microwave shock motivating the Sr substitution of 2D porous GdFeO3 perovskite for highly active oxygen evolution DOI Creative Commons
Jinglin Xian, Huiyu Jiang,

Zhiao Wu

et al.

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 88, P. 232 - 241

Published: Sept. 27, 2023

The incorporation of partial A-site substitution in perovskite oxides represents a promising strategy for precisely controlling the electronic configuration and enhancing its intrinsic catalytic activity. Conventional methods typically involve prolonged high-temperature processes. While these processes promote development unique nanostructures with highly exposed active sites, they often result uncontrolled introduced elements. Herein, we present novel approach synthesizing two-dimensional (2D) porous GdFeO3 strontium (Sr) utilizing microwave shock method. This technique enables precise control Sr content simultaneous construction 2D structures one step, capitalizing on advantages rapid heating cooling (temperature ∼1100K, rate ∼70 K s−1). sites this oxygen-rich defect structure can be clearly revealed through simulation comprehensive analysis crystal structure. For electrocatalytic oxygen evolution reaction application, synthesized Gd0.8Sr0.2FeO3 electrocatalyst exhibits an exceptional overpotential 294 mV at current density 10 mA cm−2 small Tafel slope 55.85 dec−1 alkaline electrolytes. study offers fresh perspective designing configurations perovskite.

Language: Английский

Citations

26