High-entropy energy materials: challenges and new opportunities

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(5), P. 2883 - 2905

Published: Jan. 1, 2021

An overview of high-entropy materials for energy applications, including H₂ catalysis and storage, CO₂ conversion, O₂ electrochemical is given the challenges opportunities within this field are discussed.

Language: Английский

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High-Entropy Alloys as a Platform for Catalysis: Progress, Challenges, and Opportunities

ACS Catalysis, Journal Year: 2020, Volume and Issue: 10(19), P. 11280 - 11306

Published: Sept. 17, 2020

High-entropy alloys (HEAs), which are defined as near-equimolar of five or more elements, attracting ever increasing attention because the unique properties in a variety applications. Recently, HEAs have already exhibited remarkable catalytic performance toward several thermal-driven and electrocatalytic reactions. not only regulate electronic geometric structures to large degree but also serve platform construct catalysts with unexpected performance. Herein, recent advances regarding HEA-based catalysis systematically summarized, special focus on synthetic methods for catalysts, performance, mechanistic understanding. Moreover, challenges future opportunities this research area carefully discussed. A series open questions promising directions be explored proposed, including methods, regulation properties, identification active centers, applications into photocatalysis. This Review provides an overview about progress, challenges, catalysis.

Language: Английский

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

Science, Journal Year: 2022, Volume and Issue: 376(6589)

Published: April 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.

Language: Английский

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High-entropy materials for catalysis: A new frontier

Science Advances, Journal Year: 2021, Volume and Issue: 7(20)

Published: May 12, 2021

Entropy plays a pivotal role in catalysis, and extensive research efforts have been directed to understanding the enthalpy-entropy relationship that defines reaction pathways of molecular species. On other side, surface catalysts, entropic effects rarely investigated because difficulty deciphering increased complexities multicomponent systems. Recent advances high-entropy materials (HEMs) triggered broad interests exploring entropy-stabilized systems for where enhanced configurational entropy affords virtually unlimited scope tailoring structures properties HEMs. In this review, we summarize recent progress discovery design HEMs catalysis. The correlation between compositional structural engineering optimization catalytic behaviors is highlighted alloys, oxides, beyond. Tuning composition configuration introduces untapped opportunities accessing better catalysts resolving issues are considered challenging conventional, simple

Language: Английский

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Fast site-to-site electron transfer of high-entropy alloy nanocatalyst driving redox electrocatalysis

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Oct. 28, 2020

Abstract Designing electrocatalysts with high-performance for both reduction and oxidation reactions faces severe challenges. Here, the uniform ultrasmall (~3.4 nm) high-entropy alloys (HEAs) Pt 18 Ni 26 Fe 15 Co 14 Cu 27 nanoparticles are synthesized by a simple low-temperature oil phase strategy at atmospheric pressure. The /C catalyst exhibits excellent electrocatalytic performance hydrogen evolution reaction (HER) methanol (MOR). shows overpotential of 11 mV current density 10 mA cm −2 , activity (10.96 A mg −1 −0.07 V vs. reversible electrode) stability in alkaline medium. Furthermore, it is also efficient (15.04 ) ever reported MOR solution. Periodic DFT calculations confirm multi-active sites HER on HEA surface as key factor proton intermediate transformation. Meanwhile, construction surfaces supplies fast site-to-site electron transfer processes.

Language: Английский

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

Journal of Materials Chemistry A, Journal Year: 2020, Volume and Issue: 9(2), P. 782 - 823

Published: Nov. 25, 2020

This review covers the recent developments in catalysis, water splitting, fuel cells, batteries, supercapacitors, and hydrogen storage enabled by high entropy materials.

Language: Английский

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High-entropy alloys: emerging materials for advanced functional applications

Journal of Materials Chemistry A, Journal Year: 2020, Volume and Issue: 9(2), P. 663 - 701

Published: Nov. 4, 2020

Accompanied by enhancements in the ability to fabricate materials, alloy-based materials have advanced from binary alloy systems complicated compositions along with affording newer applications, which accelerates evolution of civilization.

Language: Английский

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High Entropy Alloy Electrocatalytic Electrode toward Alkaline Glycerol Valorization Coupling with Acidic Hydrogen Production

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(16), P. 7224 - 7235

Published: April 11, 2022

Electrochemical glycerol oxidation reaction (GOR) is an attractive alternative anodic to oxygen evolution for a variety of electrolytic synthesis, thanks the possibility mass production from biomass and relative low thermodynamic potential GOR. The development high-activity cheap electrocatalysts toward GOR yet faces daunting challenge. Herein, we experimentally prepare new range high entropy alloy (HEA) self-supported electrodes with uniform HEA nanoparticles grown on carbon cloth. systematic electrochemical studies verify that HEA-CoNiCuMnMo electrode exhibits performance electrocatalysis overpotential selectivity formate products. surface atomic configurations are studied by self-developed machine learning-based Monte Carlo simulation, which points out catalytic active center be Mo sites coordinated Mn, Mo, Ni. We further develop hybrid alkali/acid flow cell pairing alkaline acidic hydrogen using commercial RhIr/Ti as anode cathode, respectively, only requires applied voltage 0.55 V reach current density 10 mA cm-2 maintains long-term electrolysis stability over 12 days continuous running at 50 Faraday efficiencies 99% H2 in cathode 92% anode.

Language: Английский

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Multi‐Sites Electrocatalysis in High‐Entropy Alloys

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(47)

Published: Aug. 26, 2021

Abstract High‐entropy alloys (HEAs) have attracted widespread attention in electrocatalysis due to their unique advantages (adjustable composition, complex surface, high tolerance, etc.). They allow for the formation of new and tailorable active sites multiple elements adjacent each other, interaction can be tailored by rational selection element configuration composition. However, it needs further explored catalyst design, elements, determination sites. This review article focuses on important progress multi‐sites HEAs. The classification is done basis catalytic reaction, including hydrogen evolution oxygen reduction alcohol oxidation carbon dioxide nitrogen reaction. Based experiments theories, a more in‐depth exploration activity HEAs will conducted, (the special role catalysis) effect. provide design some reactions, adjust compositions improve intrinsic activity. Furthermore, remaining challenges future directions promising research fields are also provided.

Language: Английский

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Bimetallic Sites for Catalysis: From Binuclear Metal Sites to Bimetallic Nanoclusters and Nanoparticles

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(8), P. 4855 - 4933

Published: March 27, 2023

Heterogeneous bimetallic catalysts have broad applications in industrial processes, but achieving a fundamental understanding on the nature of active sites at atomic and molecular level is very challenging due to structural complexity catalysts. Comparing features catalytic performances different entities will favor formation unified structure-reactivity relationships heterogeneous thereby facilitate upgrading current In this review, we discuss geometric electronic structures three representative types (bimetallic binuclear sites, nanoclusters, nanoparticles) then summarize synthesis methodologies characterization techniques for entities, with emphasis recent progress made past decade. The supported nanoparticles series important reactions are discussed. Finally, future research directions catalysis based and, more generally, prospective developments both practical applications.

Language: Английский

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