Recent progress in high-entropy alloys for catalysts: synthesis, applications, and prospects

Materials Today Energy, Год журнала: 2021, Номер 20, С. 100638 - 100638

Опубликована: Янв. 10, 2021

Язык: Английский

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High‐Entropy Alloys for Electrocatalysis: Design, Characterization, and Applications

Small, Год журнала: 2021, Номер 18(7)

Опубликована: Ноя. 5, 2021

Abstract High‐entropy alloys (HEAs) are expected to function well as electrocatalytic materials, owing their widely adjustable composition and unique physical chemical properties. Recently, HEA catalysts extensively studied in the field of electrocatalysis; this motivated authors investigate relationship between structure HEAs performance. In review, latest advances electrocatalysts systematically summarized, with special focus on nitrogen fixation, carbon cycle, water splitting, fuel cells; addition, by combining characterization analysis microstructures, rational design strategies for optimizing electrocatalysts, including controllable preparation, component regulation, strain engineering, defect theoretical prediction proposed. Moreover, existing issues future trends predicted, which will help further develop these high‐entropy materials.

Язык: Английский

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High entropy alloy electrocatalysts: a critical assessment of fabrication and performance

Journal of Materials Chemistry A, Год журнала: 2020, Номер 8(30), С. 14844 - 14862

Опубликована: Янв. 1, 2020

Critical assessment of the present status HEA NPs as catalysts, including an in-depth discussion computational studies, combinatorial screening, or machine-learning studies to find optimum composition and structure electrocatalysts.

Язык: Английский

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Tailoring the Local Environment of Platinum in Single‐Atom Pt₁/CeO₂ Catalysts for Robust Low‐Temperature CO Oxidation

Angewandte Chemie International Edition, Год журнала: 2021, Номер 60(50), С. 26054 - 26062

Опубликована: Авг. 4, 2021

Abstract A single‐atom Pt 1 /CeO 2 catalyst formed by atom trapping (AT, 800 °C in air) shows excellent thermal stability but is inactive for CO oxidation at low temperatures owing to over‐stabilization of 2+ a highly symmetric square‐planar O 4 coordination environment. Reductive activation form nanoparticles (NPs) results enhanced activity; however, the NPs are easily oxidized, leading drastic activity loss. Herein we show that tailoring local environment isolated thermal‐shock (TS) synthesis leads active and thermally stable catalyst. Ultrafast shockwaves (>1200 °C) an inert atmosphere induced surface reconstruction CeO generate single atoms asymmetric configuration. Owing this unique coordination, δ+ partially reduced state dynamically evolves during oxidation, resulting exceptional low‐temperature performance. reactivity on _TS was retained under oxidizing conditions.

Язык: Английский

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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

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Bayesian Optimization of High‐Entropy Alloy Compositions for Electrocatalytic Oxygen Reduction**

Angewandte Chemie International Edition, Год журнала: 2021, Номер 60(45), С. 24144 - 24152

Опубликована: Сен. 10, 2021

Active, selective and stable catalysts are imperative for sustainable energy conversion, engineering materials with such properties highly desired. High-entropy alloys (HEAs) offer a vast compositional space tuning properties. Too vast, however, to traverse without the proper tools. Here, we report use of Bayesian optimization on model based density functional theory (DFT) predict most active compositions electrochemical oxygen reduction reaction (ORR) least possible number sampled two HEAs Ag-Ir-Pd-Pt-Ru Ir-Pd-Pt-Rh-Ru. The discovered optima then scrutinized DFT subjected experimental validation where optimal catalytic activities verified Ag-Pd, Ir-Pt, Pd-Ru binary alloys. This study offers insight into experiments needed optimizing multimetallic which has been determined be order 50 ORR these HEAs.

Язык: Английский

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Human- and machine-centred designs of molecules and materials for sustainability and decarbonization

Nature Reviews Materials, Год журнала: 2022, Номер 7(12), С. 991 - 1009

Опубликована: Авг. 24, 2022

Язык: Английский

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Nanoreactors for particle synthesis

Nature Reviews Materials, Год журнала: 2022, Номер 7(6), С. 428 - 448

Опубликована: Янв. 13, 2022

Язык: Английский

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Ultrafast materials synthesis and manufacturing techniques for emerging energy and environmental applications

Chemical Society Reviews, Год журнала: 2023, Номер 52(3), С. 1103 - 1128

Опубликована: Янв. 1, 2023

Energy and environmental issues have attracted increasing attention globally, where sustainability low-carbon emissions are seriously considered widely accepted by government officials. In response to this situation, the development of renewable energy technologies is urgently needed complement usage traditional fossil fuels. While a big part advancement in these relies on materials innovations, new discovery limited sluggish conventional synthesis methods, greatly hindering related technologies. To address issue, review introduces comprehensively summarizes emerging ultrafast methods that could synthesize times as short nanoseconds, significantly improving research efficiency. We discuss unique advantages followed how they benefit individual applications for environment. also highlight scalability manufacturing towards their potential industrial utilization. Finally, we provide our perspectives challenges opportunities future anticipate fertile exist not only environment but many other applications.

Язык: Английский

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Surface‐Decorated High‐Entropy Alloy Catalysts with Significantly Boosted Activity and Stability

Advanced Functional Materials, Год журнала: 2022, Номер 32(33)

Опубликована: Июнь 2, 2022

Abstract High‐entropy alloy (HEA) nanoparticles are emerging catalytic materials and particularly attractive for multi‐step reactions due to their diverse active sites multielement tunability. However, design optimization often involve lengthy efforts the vast space unidentified sites. Herein, surface decoration of HEA drastically improve overall activity, stability, reduce cost is reported. A two‐step process employed first synthesize non‐noble (FeCoNiSn) then alloyed with Pd (main site), denoted as NHEA@NHEA‐Pd. As a demonstration in ethanol oxidation reaction, high mass activity 7.34 mg −1 superior stability (>91.8% retention after 2000 cycles) NHEA@NHEA‐Pd achieved, substantially outperforming traditional HEA, binary M@M‐Pd (M = Sn, Fe, Co, Ni), commercial Pd/C. In situ spectroscopy reveals that can catalytically produce oxidize CO at <0.5 V, which >200 mV lower than Sn@Sn‐Pd, suggesting enhanced owing Pd's unique high‐entropy coordination environment. This work provides novel catalysts by combining (exposing more sites) (enhancing intrinsic structural stability) boost catalysts’ durability.

Язык: Английский

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