High-entropy alloys in electrocatalysis: from fundamentals to applications

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(23), P. 8319 - 8373

Published: Jan. 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.

Language: Английский

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Optimizing Intermediate Adsorption via Heteroatom Ensemble Effect over RuFe Bimetallic Alloy for Enhanced Nitrate Electroreduction to Ammonia

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(31)

Published: June 30, 2023

Abstract The electrochemical nitrate reduction reaction (NO 3 RR) is a promising approach for removal and NH synthesis at ambient conditions. As complex eight‐electron/nine‐proton transfer process, its performance relies heavily on the adsorption ability of intermediates catalyst surface, which determined by geometric electronic configurations active sites. In this work, heteroatom ensemble effect deliberately triggered over RuFe bimetallic alloy to optimize intermediate NO RR. A record‐high yield rate 118.8 mg h −1 high Faradaic efficiency 92.2% are achieved −1.4 V vs reversible hydrogen electrode, ranking top state‐of‐the‐art. Experimental computational results reveal that characteristics induced play crucial roles. Both Ru Fe display continuous state throughout Fermi level, suggesting electron density benefits whole result, facilitated − , efficient stabilization key intermediates, as well timely desorption simultaneously achieved, thus significantly promoting direct .

Language: Английский

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Biomass derived diverse carbon nanostructure for electrocatalysis, energy conversion and storage

Carbon, Journal Year: 2023, Volume and Issue: 211, P. 118105 - 118105

Published: May 11, 2023

Language: Английский

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Hetero MOF‐On‐MOF of Ni‐BDC/NH₂‐MIL‐88B(Fe) Enables Efficient Electrochemical Seawater Oxidation

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(22)

Published: Feb. 4, 2024

Abstract Seawater electrolysis is a sustainable technology for producing hydrogen that would neither cause global freshwater shortages nor create carbon emissions. However, this severely hampered by the insufficient stability and competition from chlorine evolution reaction (ClER) in actual application. Herein, metal–organic framework (MOF)‐on‐MOF heterojunction (Ni‐BDC/NH 2 ‐MIL‐88B(Fe)) denoted as (Ni‐BDC/NM88B(Fe)) synthesized an effective oxygen (OER) electrocatalyst high‐performance seawater electrolysis, which exhibits long of 200 h low overpotentials 232 299 mV at 100 mA cm −2 alkaline solution, respectively. The exceptional performance attributed to rapid self‐reconstruction Ni‐BDC/NM88B(Fe) produce NiFeOOH protective layer, thereby avoiding ClER‐induced dissolution. Moreover, interface interaction between Ni‐BDC NM88B(Fe) could form Ni─O─Fe bonds promote electron transfer lower energy barrier rate‐determining step, accelerating OER. These electrochemical properties make it intriguing candidate efficient practical electrolysis.

Language: Английский

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Progress in Single/Multi Atoms and 2D‐Nanomaterials for Electro/Photocatalytic Nitrogen Reduction: Experimental, Computational and Machine Leaning Developments

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(28)

Published: Feb. 11, 2024

Abstract The conversion of atmospheric nitrogen (N 2 ) into ammonia (NH 3 ), known as fixation, plays a crucial role in sustaining life on Earth, facing innovation with electrocatalytic and photocatalytic methods. These approaches promise gentler conversions from to ammonia, diverging the energy‐intensive Haber‐Bosch process, which requires complex plant infrastructure. Vitality lies eco‐friendly, cost‐effective, energy‐efficient pathways. challenge is that electrocatalysts photocatalysts for reduction have shown low Faraday efficiency, hampered by hydrogen evolution. This work delves recent strides electro/photo‐catalytic fixation/reduction, deciphering mechanisms, catalysts, prospects. By unveiling core principles steering these processes, it dissects efficiency drivers. Experimental theoretical studies, ranging density functional calculations/simulations machine learning‐based catalyst screening, mark path toward highly efficient including single/multi‐atom catalysts embedded 2D materials. journey explores diverse assessing their performance, spotlighting emerging nanomaterials, heterostructures, co‐catalyst techniques. Perspectives future directions potential applications fixation/reduction are offered, emphasizing sustainable management implications global agriculture environmental sustainability.

Language: Английский

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Cu–Bi Bimetallic Sulfides Loaded on Two-Dimensional Ti₃C₂T_x MXene for Efficient Electrocatalytic Nitrogen Reduction under Ambient Conditions

Nano Letters, Journal Year: 2024, Volume and Issue: 24(33), P. 10297 - 10304

Published: Aug. 12, 2024

In this paper, Ti

Language: Английский

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Nonmetal Atom Doping Induced Orbital Shifts and Charge Modulation at the Edge of Two-Dimensional Boron Carbonitride Leading to Enhanced Photocatalytic Nitrogen Reduction

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(9), P. 5987 - 5997

Published: Feb. 21, 2024

Electronic structure, particularly charge state analysis, plays a crucial role in comprehending catalytic mechanisms. This study focuses on metal-free boron carbonitride (BCN) nanosheets as case to investigate the impact of heteroatom doping active sites at edge two-dimensional (2D) nanomaterials. Our observations revealed that induces shift frontier p

Language: Английский

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Active Hydrogen for Electrochemical Ammonia Synthesis

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: April 15, 2024

Abstract Electrochemical ammonia synthesis (EAS) presents an attractive alternative to the Haber–Bosch process due benefits of energy saving, low carbon emission, environmental friendliness, and so on. However, competing hydrogen evolution reaction (HER) severely limits yield, selectivity, current efficiency NH 3 . Although accumulation self‐aggregation active (H*) are primary causes HER, it also serves as critical species intermediate for multistep hydrogenation deoxygenation processes. Therefore, sensible regulation H* generation consumption essential enhancing EAS performance. And is significant thoroughly review strategies control. Herein, a comprehensive introduction provide fundamental understanding its role in electrochemical reactions, including generation, conversion, identification, quantification protocols first proposed. In addition, control carefully summarized with particular focus on regulating enhance activity, Faradaic efficiency. Finally, remaining challenges perspectives discussed. This intended offer profound reactions development technology.

Language: Английский

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Hetero-layered 2D materials: Scalable preparation and energy applications

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 163, P. 100937 - 100937

Published: Jan. 28, 2025

Language: Английский

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Strategies to achieve effective nitrogen activation

Carbon Energy, Journal Year: 2024, Volume and Issue: 6(5)

Published: Feb. 23, 2024

Abstract Ammonia serves as a crucial chemical raw material and hydrogen energy carrier. Aqueous electrocatalytic nitrogen reduction reaction (NRR), powered by renewable energy, has attracted tremendous interest during the past few years. Although some achievements have been revealed in aqueous NRR, significant challenges also identified. The activity selectivity are fundamentally limited activation competitive evolution. This review focuses on hurdles of delves into complementary strategies, including materials design system optimization (reactor, electrolyte, mediator). Then, it introduces advanced interdisciplinary technologies that recently emerged for using high‐energy physics such plasma triboelectrification. With better understanding corresponding mechanisms coming years, these potential to be extended further applications. provides insight stability different systems. We then recommend rigorous detailed protocol investigating NRR performance highlight several research directions this exciting field, coupling with applications, situ/operando characterizations, theoretical calculations.

Language: Английский

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