Recent progress of high-entropy materials for energy storage and conversion

Amiri, Azadeh; Shahbazian‐Yassar, Reza

doi:10.1039/d0ta09578h

Cited by 329 publications

(240 citation statements)

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“…Nonetheless, we will use the expression HEA throughout this manuscript as it is deeply rooted in the discourse. It is well established that a rational design of HEA composition allows controlling their physicochemical properties at the nanoscale and performance, e.g., in catalysis [12,15,16] and energy storage [17][18][19]. Due to these unique interactions of distinct neighboring metal atoms [2], HEA NPs are discussed and developed as very promising candidates to replace established but scarce and expensive noble metals in catalytic reactions such as oxygen evolution [20][21][22][23][24], oxygen reduction [2,25,26], methanol oxidation [27][28][29], CO 2 reduction [30,31] and hydrogen evolution [22,32,33].…”

Section: Introductionmentioning

confidence: 99%

Laser-generated high entropy metallic glass nanoparticles as bifunctional electrocatalysts

Johny

Kamp

et al. 2021

Nano Res.

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High entropy metallic glass nanoparticles (HEMG NPs) are very promising materials for energy conversion due to the wide tuning possibilities of electrochemical potentials offered by their multimetallic character combined with an amorphous structure. Up until now, the generation of these HEMG NPs involved tedious synthesis procedures where the generated particles were only available on highly specialized supports, which limited their widespread use. Hence, more flexible synthetic approaches to obtain colloidal HEMG NPs for applications in energy conversion and storage are highly desirable. We utilized pulsed laser ablation of bulk high entropy alloy targets in acetonitrile to generate colloidal carbon-coated CrCoFeNiMn and CrCoFeNiMnMo HEMG NPs. An in-depth analysis of the structure and elemental distribution of the obtained nanoparticles down to single-particle levels using advanced transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) methods revealed amorphous quinary and senary alloy phases with slight manganese oxide/hydroxide surface segregation, which were stabilized within graphitic shells. Studies on the catalytic activity of the corresponding carbon-HEMG NPs during oxygen evolution and oxygen reduction reactions revealed an elevated activity upon the incorporation of moderate amounts of Mo into the amorphous alloy, probably due to the defect generation by atomic size mismatch. Furthermore, we demonstrate the superiority of these carbon-HEMG NPs over their crystalline analogies and highlight the suitability of these amorphous multi-elemental NPs in electrocatalytic energy conversion.

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Section: Introductionmentioning

confidence: 99%

Laser-generated high entropy metallic glass nanoparticles as bifunctional electrocatalysts

Johny

Kamp

et al. 2021

Nano Res.

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“…There are many physical or chemical synthetic routes being developed in the past 20 years to fabricate HEMs (Amiri and Shahbazian-Yassar, 2021;Tomboc et al, 2020;Xin et al, 2020). In the following discussion, we will briefly introduce separately the synthetic approaches of HEAs, HEOs, and other HEMs, correlating to their structural features.…”

Section: Syntheses and Structuresmentioning

confidence: 99%

High-entropy materials for energy-related applications

Zhao

et al. 2021

iScience

161

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High-entropy materials (HEMs), including high-entropy alloys (HEAs), high-entropy oxides (HEOs), and other high-entropy compounds, have gained significant interests over the past years. These materials have unique structures with the coexistence of antisite disordering and crystal periodicity, which were originally investigated as structural materials. Recently, they have emerged for energyrelated applications, such as catalysis, energy storage, etc. In this work, we review the research progress of energy-related applications of HEMs. After an introduction on the background, theory, and syntheses of HEMs, we survey their applications including electrocatalysis, batteries, and others, aiming to retrieve the correlations between their structures and performances. In the end, we discussed the challenges and future directions for developing HEMs.

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“…Nowadays, developing HEAs as catalyst materials has gained good popularity in chemical synthesis, particularly to reduce energy consumption and to synthesise new materials like reduced/oxidised organic products (CO 2 to CH 4 ; HCOOH to H 2, etc.) [6,[76][77][78]. HEAs comprise unique surfaces which can have multiple active energy level catalytic sites presented by multi-elements sitting over the surface (synergetic effect due to many random elements).…”

Section: Catalytic Materialsmentioning

confidence: 99%

Emergence of machine learning in the development of high entropy alloy and their prospects in advanced engineering applications

Katiyar

Goel

2021

emergent mater.

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The high entropy alloys have become the most intensely researched materials in recent times. They offer the flexibility to choose a large array of metallic elements in the periodic table, a combination of which produces distinctive desirable properties that are not possible to be obtained by the pristine metals. Over the past decade, a myriad of publications has inundated the aspects of materials synthesis concerning HEA. Hitherto, the practice of HEA development has largely relied on a trial-and-error basis, and the hassles associate with this effort can be reduced by adopting a machine learning approach. This way, the “right first time” approach can be adopted to deterministically predict the right combination and composition of metallic elements to obtain the desired functional properties. This article reviews the latest advances in adopting machine learning approaches to predict and develop newer compositions of high entropy alloys. The review concludes by highlighting the newer applications areas that this accelerated development has enabled such that the HEA coatings can now potentially be used in several areas ranging from catalytic materials, electromagnetic shield protection and many other structural applications.

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Recent progress of high-entropy materials for energy storage and conversion

Abstract: The emergence of high entropy materials (HEMs) with their excellent mechanical properties, stability at high temperatures, and high chemical stability is poised to yield new advancement in the performance of...

Cited by 329 publications

References 273 publications

Laser-generated high entropy metallic glass nanoparticles as bifunctional electrocatalysts

Laser-generated high entropy metallic glass nanoparticles as bifunctional electrocatalysts

High-entropy materials for energy-related applications

Emergence of machine learning in the development of high entropy alloy and their prospects in advanced engineering applications

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