High-entropy nanoparticles: Synthesis-structure-property relationships and data-driven discovery

Science, Год журнала: 2022, Номер 376(6589)

Опубликована: Апрель 7, 2022

High-entropy nanoparticles have become a rapidly growing area of research in recent years. Because their multielemental compositions and unique high-entropy mixing states (i.e., solid-solution) that can lead to tunable activity enhanced stability, these received notable attention for catalyst design exploration. However, this strong potential is also accompanied by grand challenges originating from vast compositional space complex atomic structure, which hinder comprehensive exploration fundamental understanding. Through multidisciplinary view synthesis, characterization, catalytic applications, high-throughput screening, data-driven materials discovery, review dedicated discussing the important progress unveiling critical needs future development catalysis, energy, sustainability applications.

Язык: Английский

---

High-entropy alloys in electrocatalysis: from fundamentals to applications

Chemical Society Reviews, Год журнала: 2023, Номер 52(23), С. 8319 - 8373

Опубликована: Янв. 1, 2023

In this review, we provide a comprehensive summary of recent advances in the synthesis strategies, design principles, and characterization technologies high entropy alloys, their applications various electrocatalytic conversion reactions.

Язык: Английский

---

High-entropy materials for energy and electronic applications

Nature Reviews Materials, Год журнала: 2024, Номер 9(4), С. 266 - 281

Опубликована: Март 6, 2024

Язык: Английский

---

High‐entropy alloy catalysts: From bulk to nano toward highly efficient carbon and nitrogen catalysis

Carbon Energy, Год журнала: 2022, Номер 4(5), С. 731 - 761

Опубликована: Июль 12, 2022

Abstract High‐entropy alloys (HEAs) have attracted widespread attention as both structural and functional materials owing to their huge multielement composition space unique high‐entropy mixing structure. Recently, emerging HEAs, either in nano or highly porous bulk forms, are developed utilized for various catalytic clean energy applications with superior activity remarkable durability. Being catalysts, HEAs possess some advantages, including (1) a the discovery of new catalysts fine‐tuning surface adsorption (i.e., selectivity), (2) diverse active sites derived from random that especially suitable multistep catalysis, (3) stabilized structure improves durability harsh environments. Benefited these inherent HEA demonstrated performances promising complex carbon (C) nitrogen (N) cycle reactions featuring reaction pathways many different intermediates. However, design, synthesis, characterization, understanding C‐ N‐involved extremely challenging because reactions. In this review, we present recent development particularly on innovative extensive syntheses, advanced (in situ) characterizations, C N looping reactions, aiming provide focused view how utilize intrinsically important end, remaining challenges future directions proposed guide application efficient storage chemical conversion toward neutrality.

Язык: Английский

---

Application of Machine Learning in Optimizing Proton Exchange Membrane Fuel Cells: A Review

Energy and AI, Год журнала: 2022, Номер 9, С. 100170 - 100170

Опубликована: Май 30, 2022

Proton exchange membrane fuel cells (PEMFCs) as energy conversion devices for hydrogen are crucial achieving an eco-friendly society, but their cost and performance still not satisfactory large-scale commercialization. Multiple physical chemical coupling processes occur simultaneously at different scales in PEMFCs. Hence, previous studies only focused on the optimization of components such a complex system separately. In addition, traditional trial-and-error method is very inefficient breakthrough goal. Machine learning (ML) tool from data science field. Trained based datasets built experimental records or theoretical simulation models, ML models can mine patterns that difficult to draw intuitively. greatly reduce attempts by predicting target output. Serving surrogate approach could also computational numerical simulations first-principle multiphysics simulations. Related reports currently trending, has been proven able speed up tasks this field, active electrocatalysts, optimizing electrode assembly (MEA), designing efficient flow channels, providing stack operation strategies. Therefore, paper reviews applications contributions aiming PEMFC regarding its potential bring research paradigm revolution. addition introducing summarizing information newcomers who interested emerging cross-cutting we look forward propose several directions future development.

Язык: Английский

---

A High-Entropy Oxide as High-Activity Electrocatalyst for Water Oxidation

ACS Nano, Год журнала: 2023, Номер 17(6), С. 5329 - 5339

Опубликована: Март 13, 2023

High-entropy materials are an emerging pathway in the development of high-activity (electro)catalysts because inherent tunability and coexistence multiple potential active sites, which may lead to earth-abundant catalyst for energy-efficient electrochemical energy storage. In this report, we identify how multication composition high-entropy perovskite oxides (HEO) contributes high catalytic activity oxygen evolution reaction (OER), i.e., key kinetically limiting half-reaction several conversion technologies, including green hydrogen generation. We compare (001) facet LaCr0.2Mn0.2Fe0.2Co0.2Ni0.2O3-δ with parent compounds (single B-site ABO3 perovskite). While single perovskites roughly follow expected volcano-type trends, HEO clearly outperforms all its 17 680 times higher currents at a fixed overpotential. As samples were grown as epitaxial layer, our results indicate intrinsic composition-function relationship, avoiding effects complex geometries or unknown surface composition. In-depth X-ray photoemission studies reveal synergistic effect simultaneous oxidation reduction different transition metal cations during adsorption intermediates. The surprisingly OER demonstrates that HEOs highly attractive, material class electrocatalysts, possibly allowing be fine-tuned beyond scaling limits mono- bimetallic oxides.

Язык: Английский

---

Recent experimental and theoretical advances in the design and science of high-entropy alloy nanoparticles

Nano Energy, Год журнала: 2023, Номер 110, С. 108362 - 108362

Опубликована: Март 20, 2023

Язык: Английский

---

Designing strategies and enhancing mechanism for multicomponent high-entropy catalysts

Chemical Science, Год журнала: 2023, Номер 14(4), С. 771 - 790

Опубликована: Янв. 1, 2023

High-entropy materials (HEMs) are new-fashioned functional in the field of catalysis owing to their large designing space, tunable electronic structure, interesting "cocktail effect", and entropy stabilization effect. Many effective strategies have been developed design advanced catalysts for various important reactions. Herein, we firstly review so far optimizing HEM-based underlying mechanism revealed by both theoretical simulations experimental aspects. In light this overview, subsequently present some perspectives about development provide serviceable guidelines and/or inspiration further studying multicomponent catalysts.

Язык: Английский

---

Scalable Synthesis of Multi‐Metal Electrocatalyst Powders and Electrodes and their Application for Oxygen Evolution and Water Splitting

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(12)

Опубликована: Янв. 14, 2023

Multi-metal electrocatalysts provide nearly unlimited catalytic possibilities arising from synergistic element interactions. We propose a polymer/metal precursor spraying technique that can easily be adapted to produce large variety of compositional different multi-metal catalyst materials. To demonstrate this, 11 catalysts were synthesized, characterized, and investigated for the oxygen evolution reaction (OER). Further investigation most active OER catalyst, namely CoNiFeMoCr, revealed polycrystalline structure, operando Raman measurements indicate multiple sites are participating in reaction. Moreover, Ni foam-supported CoNiFeMoCr electrodes developed applied water splitting flow-through electrolysis cells with electrolyte gaps zero-gap membrane electrode assembly (MEA) configurations. The proposed alkaline MEA-type electrolyzers reached up 3 A cm-2 , 24 h demonstrated no loss current density 1 .

Язык: Английский

---

High‐Entropy Nanomaterials for Advanced Electrocatalysis

Small Science, Год журнала: 2023, Номер 3(5)

Опубликована: Апрель 5, 2023

High‐entropy alloys refer to near‐equimolar of five or more elements and are receiving attention due their unique physical chemical properties. In electrocatalysis, they serve as active sites in multiple elements, favoring the optimized adsorption/desorption property toward target reaction. nanomaterials (HENMs) attractive candidates electrocatalysts by taking advantage a high surface‐to‐volume ratio tailored composition. This review begins with concept high‐entropy materials various strategies for designing electrocatalysts. Then, recent advances HENMs applications (water‐splitting reaction, carbon dioxide reduction alcohol oxidation etc.) introduced catalytic performances. Finally, based on current status challenging aspects future insight advanced electrocatalysis discussed proposed.

Язык: Английский

---