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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Sputtering thin films: Materials, applications, challenges and future directions

Advances in Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 330, P. 103203 - 103203

Published: May 22, 2024

Language: Английский

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Integrating Host Design and Tailored Electronic Effects of Yolk–Shell Zn−Mn Diatomic Sites for Efficient CO₂ Electroreduction

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(3)

Published: Nov. 24, 2023

Abstract Modulating the surface and spatial structure of host is associated with reactivity active site, also enhances mass transfer effect CO 2 electroreduction process (CO RR). Herein, we describe development two‐step ligand etch–pyrolysis to access an asymmetric dual‐atomic‐site catalyst (DASC) composed a yolk–shell carbon framework (Zn 1 Mn ‐SNC) derived from S,N‐coordinated Zn−Mn dimers anchored on metal–organic (MOF). In Zn ‐SNC, electronic effects S/N−Zn−Mn−S/N configuration are tailored by strong interactions between dual sites co‐coordination S/N atoms, rendering structural stability atomic distribution. H‐cell, ‐SNC DASC shows low onset overpotential 50 mV high Faraday efficiency 97 % applied 343 mV, thus outperforming counterparts, in flow cell, it reaches current density 500 mA cm −2 at −0.85 V, benefitting accessibility sites. DFT simulations showed that diatomic site optimal adsorption strength COOH* lowers reaction energy barrier, boosting intrinsic RR activity DASC. The structure‐property correlation found this study suggests new ideas for highly accessible catalysts.

Language: Английский

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Molecular Imprinting Technology Enables Proactive Capture of Nitrogen for Boosted Ammonia Synthesis under Ambient Conditions

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(51)

Published: Aug. 9, 2023

Electrochemical nitrogen reduction reaction (NRR) is a burgeoning field for green and sustainable ammonia production, in which numerous potential catalysts emerge endlessly. However, satisfactory performances are still not realized under practical applications due to the limited solubility sluggish diffusion of at interface. Herein, molecular imprinting technology adopted construct an adlayer with abundant imprints on electrocatalyst, capable selectively recognizing proactively aggregating high-concentrated interface while hindering access overwhelming water simultaneously. With this favorable microenvironment, can preferentially occupy active surface, NRR equilibrium be positively shifted facilitate kinetics. Approximately threefold improvements both production rate (185.7 µg h-1 mg-1 ) Faradaic efficiency (72.9%) achieved by metal-free catalyst compared bare one. It believed that strategy should general method find further applicability or even other reactions facing similar challenges.

Language: Английский

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Advancements in Electrocatalytic Nitrogen Reduction: A Comprehensive Review of Single‐Atom Catalysts for Sustainable Ammonia Synthesis

Small, Journal Year: 2024, Volume and Issue: 20(32)

Published: March 22, 2024

Abstract Electrocatalytic nitrogen reduction technology seamlessly aligns with the principles of environmentally friendly chemical production. In this paper, a comprehensive review recent advancements in electrocatalytic NH 3 synthesis utilizing single‐atom catalysts (SACs) is offered. Into research and applications three categories SACs: noble metals (Ru, Au, Rh, Ag), transition (Fe, Mo, Cr, Co, Sn, Y, Nb), nonmetallic (B) context ammonia delved. In‐depth insights into material preparation methods, coordination patterns, characteristics reaction (NRR) are provided. The systematic comparison capabilities various SAC types offers framework for their integration NRR. Additionally, challenges, potential solutions, future prospects incorporating SACs endeavors discussed.

Language: Английский

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Comprehensive understanding of the thriving electrocatalytic nitrate/nitrite reduction to ammonia under ambient conditions

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 92, P. 459 - 483

Published: Jan. 4, 2024

Language: Английский

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Donor‐Site‐Acceptor Covalent Organic Frameworks Enable Spontaneous Nitrogen Dissociation for Boosted Photoelectrochemical Ammonia Synthesis

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(24)

Published: Feb. 5, 2024

Abstract Photoelectrochemical (PEC) technology offers new opportunities for pushing the renewable energy‐driven ammonia synthesis toward a practical level, while still facing unsatisfactory efficiency due to obstacle of dissociating inert nitrogen triple‐bonds. Herein, novel donor‐site‐acceptor system is constructed in covalent organic frameworks tackle this challenge highly efficient PEC synthesis. Highly active boron site elaborately embedded between donor and acceptor units, which can be effectively activated with continuous electron flow upon photoexcitation. With assistance solar irradiation, stubborn dissociation successfully changed from passive endothermic reaction spontaneous exothermic process, completely eliminating energy barrier rate‐determining step facilitating overall kinetics. The proof‐of‐concept achieved an excellent NRR performance remarkable Faradaic 91.6%, reaching target set by U.S. Department Energy (90%).

Language: Английский

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Emerging two-dimensional materials: Synthesis, physical properties, and application for catalysis in energy conversion and storage

The Innovation Materials, Journal Year: 2024, Volume and Issue: 2(1), P. 100060 - 100060

Published: Jan. 1, 2024

<p>Inorganic, organic, and hybrid two-dimensional (2D) materials are being developed for ever-expanding numbers of applications, though energy catalysis remain the main drivers their development. We present overviews bottom-up top-down synthetic strategies such examine manufacturing scalability issues. Mechanical, electrical, thermal properties modulation highlighted because they fundamental to above-mentioned drivers. The burgeoning importance heterostructures in materials, particularly electrode design function is stressed. Detailed attention given applications 2D electrocatalysis reactions: oxygen reduction, evolution, hydrogen carbon dioxide nitrogen reduction. Water splitting, reduction by photocatalysis also examined. A perspective expected advances expansion types with a focus on heterostructure development, presented conclusion.</p>

Language: Английский

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Advances in MXene-based single-atom catalysts for electrocatalytic applications

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 529, P. 216462 - 216462

Published: Jan. 21, 2025

Language: Английский

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Precisely designing asymmetrical selenium-based dual-atom sites for efficient oxygen reduction

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 7, 2025

Owing to their synergistic interactions, dual-atom catalysts (DACs) with well-defined active sites are attracting increasing attention. However, more experimental research and theoretical investigations needed further construct explicit understand the synergy that facilitates multistep catalytic reactions. Herein, we precisely design a series of asymmetric selenium-based comprise heteronuclear SeN2–MN2 (M = Fe, Mn, Co, Ni, Cu, Mo, etc.) for efficient oxygen reduction reaction (ORR). Spectroscopic characterisation calculations revealed selenium atoms can efficiently polarise charge distribution other metal through short-range regulation. In addition, compared Se or Fe single-atom sites, SeFe facilitate in conversion energy barrier from *O *OH via coadsorption intermediates. Among these designed catalysts, selenium-iron achieves superior alkaline ORR performance, half-wave potential 0.926 V vs. reversible hydrogen electrode. SeN2–FeN2-based Zn–air battery has high specific capacity (764.8 mAh g−1) maximum power density (287.2 mW cm−2). This work may provide good perspective designing DACs improve efficiency. Dual-atom precise gaining attention, but studies optimise construction synergy. Here authors report dual- atom reaction.

Language: Английский

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