High-entropy energy materials: challenges and new opportunities

Energy & Environmental Science, Год журнала: 2021, Номер 14(5), С. 2883 - 2905

Опубликована: Янв. 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.

Язык: Английский

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High-entropy materials for catalysis: A new frontier

Science Advances, Год журнала: 2021, Номер 7(20)

Опубликована: Май 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

Язык: Английский

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Unraveling the electronegativity-dominated intermediate adsorption on high-entropy alloy electrocatalysts

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Май 13, 2022

Abstract High-entropy alloys have received considerable attention in the field of catalysis due to their exceptional properties. However, few studies hitherto focus on origin outstanding performance and accurate identification active centers. Herein, we report a conceptual experimental approach overcome limitations single-element catalysts by designing FeCoNiXRu (X: Cu, Cr, Mn) system with various sites that different adsorption capacities for multiple intermediates. The electronegativity differences between mixed elements HEA induce significant charge redistribution create highly Co Ru optimized energy barriers simultaneously stabilizing OH * H intermediates, which greatly enhances efficiency water dissociation alkaline conditions. This work provides an in-depth understanding interactions specific opens up fascinating direction breaking scaling relation issues multistep reactions.

Язык: Английский

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

Journal of Materials Chemistry A, Год журнала: 2020, Номер 9(2), С. 782 - 823

Опубликована: Ноя. 25, 2020

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

Язык: 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, Год журнала: 2022, Номер 144(16), С. 7224 - 7235

Опубликована: Апрель 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.

Язык: Английский

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Machine Learning for Electrocatalyst and Photocatalyst Design and Discovery

Chemical Reviews, Год журнала: 2022, Номер 122(16), С. 13478 - 13515

Опубликована: Июль 21, 2022

Electrocatalysts and photocatalysts are key to a sustainable future, generating clean fuels, reducing the impact of global warming, providing solutions environmental pollution. Improved processes for catalyst design better understanding electro/photocatalytic essential improving effectiveness. Recent advances in data science artificial intelligence have great potential accelerate electrocatalysis photocatalysis research, particularly rapid exploration large materials chemistry spaces through machine learning. Here comprehensive introduction to, critical review of, learning techniques used research provided. Sources electro/photocatalyst current approaches representing these by mathematical features described, most commonly methods summarized, quality utility models evaluated. Illustrations how applied novel discovery elucidate electrocatalytic or photocatalytic reaction mechanisms The offers guide scientists on selection research. application catalysis represents paradigm shift way advanced, next-generation catalysts will be designed synthesized.

Язык: Английский

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What Makes High‐Entropy Alloys Exceptional Electrocatalysts?

Angewandte Chemie International Edition, Год журнала: 2021, Номер 60(52), С. 26894 - 26903

Опубликована: Авг. 26, 2021

Abstract The formation of a vast number different multielement active sites in compositionally complex solid solution materials, often more generally termed high‐entropy alloys, offers new and unique concepts catalyst design, which mitigate existing limitations change the view on structure–activity relations. We discuss these by summarising currently fundamental knowledge critically assess chances this material class, also highlighting design strategies. A roadmap is proposed, illustrating characteristic could be exploited using strategy, breakthroughs might possible to guide future research highly promising class for (electro)catalysis.

Язык: Английский

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Hydrogen spillover-driven synthesis of high-entropy alloy nanoparticles as a robust catalyst for CO2 hydrogenation

Nature Communications, Год журнала: 2021, Номер 12(1)

Опубликована: Июнь 23, 2021

Abstract High-entropy alloys (HEAs) have been intensively pursued as potentially advanced materials because of their exceptional properties. However, the facile fabrication nanometer-sized HEAs over conventional catalyst supports remains challenging, and design rational synthetic protocols would permit development innovative catalysts with a wide range potential compositions. Herein, we demonstrate that titanium dioxide (TiO 2 ) is promising platform for low-temperature synthesis supported CoNiCuRuPd HEA nanoparticles (NPs) at 400 °C. This process driven by pronounced hydrogen spillover effect on TiO in conjunction coupled proton/electron transfer. The NPs produced this work were found to be both active extremely durable during CO hydrogenation reaction. Characterization means various situ techniques theoretical calculations elucidated cocktail sluggish diffusion originating from synergistic obtained combination elements.

Язык: Английский

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High-entropy materials for energy-related applications

iScience, Год журнала: 2021, Номер 24(3), С. 102177 - 102177

Опубликована: Фев. 16, 2021

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

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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