Tailoring of Active Sites from Single to Dual Atom Sites for Highly Efficient Electrocatalysis

ACS Nano, Journal Year: 2022, Volume and Issue: 16(11), P. 17572 - 17592

Published: Nov. 4, 2022

Single atom catalysts (SACs) have been attracting extensive attention in electrocatalysis because of their unusual structure and extreme utilization, but the low metal loading unified single site induced scaling relations may limit activity practical application. Tailoring active sites at atomic level is a sensible approach to break existing limits SACs. In this review, SACs were first discussed regarding carbon or non-carbon supports. Then, five tailoring strategies elaborated toward improving electrocatalytic SACs, namely strain engineering, spin-state tuning axial functionalization ligand porosity so as optimize electronic state sites, tune d orbitals transition metals, adjust adsorption strength intermediates, enhance electron transfer, elevate mass transport efficiency. Afterward, from angle inducing redistribution optimizing nature centers, synergistic effect adjacent atoms recent advances on with binuclear configuration which include simple, homonuclear, heteronuclear dual (DACs) summarized. Finally, summary some perspectives for achieving efficient sustainable presented based strategies, design situ characterization.

Language: Английский

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Co(CN)3 catalysts with well-defined coordination structure for the oxygen reduction reaction

Nature Catalysis, Journal Year: 2023, Volume and Issue: 6(12), P. 1164 - 1173

Published: Nov. 16, 2023

Language: Английский

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Advances on Axial Coordination Design of Single-Atom Catalysts for Energy Electrocatalysis: A Review

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Oct. 13, 2023

Abstract Single-atom catalysts (SACs) have garnered increasingly growing attention in renewable energy scenarios, especially electrocatalysis due to their unique high efficiency of atom utilization and flexible electronic structure adjustability. The intensive efforts towards the rational design synthesis SACs with versatile local configurations significantly accelerated development efficient sustainable electrocatalysts for a wide range electrochemical applications. As an emergent coordination avenue, intentionally breaking planar symmetry by adding ligands axial direction metal single atoms offers novel approach tuning both geometric structures, thereby enhancing electrocatalytic performance at active sites. In this review, we briefly outline burgeoning research topic axially coordinated provide comprehensive summary recent advances synthetic strategies Besides, challenges outlooks field also been emphasized. present review provides in-depth understanding SACs, which could bring new perspectives solutions fine regulation structures catering high-performing electrocatalysis.

Language: Английский

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Structural Regulation Strategies of Atomic Cobalt Catalysts for Oxygen Electrocatalysis

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Abstract Oxygen electrocatalysis is a core reaction in renewable energy devices, greatly promoting the transformation and upgrading of structure. Nonetheless, performance conversion devices hindered by large overpotential slow kinetics oxygen electrocatalytic reactions. Recently, single‐atom catalysts (SACs) have emerged as promising contenders field because their exceptional metal atom utilization, distinctive coordination environment, adjustable electronic properties. This review presents latest advancements design Co‐based SACs for electrocatalysis. First, OER ORR mechanisms are introduced. Subsequently, strategies regulating structure summarized three aspects, including centers, support carriers. A particular emphasis given to relationship between properties catalysts. Afterward, applications explored. Ultimately, challenges prospects prospected.

Language: Английский

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Optimizing the binding of the *OOH intermediate via axially coordinated Co-N5 motif for efficient electrocatalytic H2O2 production

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 338, P. 123078 - 123078

Published: July 7, 2023

Language: Английский

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Spin-Modulated Oxygen Electrocatalysis

Precision Chemistry, Journal Year: 2023, Volume and Issue: 1(7), P. 395 - 417

Published: Aug. 1, 2023

The electrocatalysis reactions involving oxygen, such as oxygen evolution reaction (OER) and reduction (ORR), play a critical role in energy storage/conversion applications, e.g., fuel cells, metal-air batteries, electrochemical water splitting. high kinetic barrier of the OER/ORR is highly associated with spin state interconversion between singlet OH–/H2O triplet O2, which influenced by magnetism catalysts. This Review summarizes recent progress advances understanding spin/magnetism-related effects to develop theory. It demonstrated that states (low, intermediate, spin) magnetic transition metal catalysts (TMCs) can directly affect barriers tailoring bonding intermediates TMCs. Besides, TMCs build spin-selective channel filter electron spins required for single/triplet O species during OER/ORR. In this Review, we introduced many approaches modulating state, instance, altering crystal field, oxidation active-site ions, morphology What's more, field drive flip ions achieve alignment (↑↑) (i.e., facilitating polarization), will strengthen selectivity accelerating filtration transfer same direction generation conversion ↑O═O↑. Importantly, origin enhancement on are deeply discussed, provides great vision magnetism-assisted catalysis. Finally, challenges perspectives future development spin/magnetism catalysis presented. expected highlight significance theory breaking bottleneck promote high-efficientcy electrocatalysts practical applications.

Language: Английский

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Recent progress in heteroatom doping to modulate the coordination environment of M–N–C catalysts for the oxygen reduction reaction

Materials Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 7(13), P. 2595 - 2619

Published: Jan. 1, 2023

This review focuses on the effects of heteroatom doping coordination configuration and electronic structure M–N–C catalysts for ORR from three aspects: coordinated atoms, environmental axial atoms.

Language: Английский

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Intermolecular Metallic Single‐Site Complexes Dispersed on Mo₂TiC₂T_x/MoS₂ Heterostructure Induce Boosted Solar‐Driven Water Splitting

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(15)

Published: Feb. 12, 2023

Abstract Successful development of an electrocatalyst capable to promote the hydrogen evolution reaction (HER) and oxygen (OER) elements water electrolysis is desirable for green gas production. Herein, this work designs intermolecular metallic single‐site complexes iron phthalocyanine (Fe Pc ) vanadium oxide (VO dually immobilized on 3D hierarchical MoS 2 ‐coated MXene Mo TiC T x (MX/MoS heterostructures as a high‐performance bifunctional electrocatalyst. The well‐organized structure with unusual coordination environment electronic localization impressively enhances adsorption activation remarkably accelerate HER OER kinetics. Therefore, hybrid material requires overpotentials small 17.4 300 mV drive 10 mA cm −2 50 in 1.0 m KOH media, respectively. electrolyzer MX/MoS ‐Fe VO Pc(+,−) exhibits low cell voltage only 1.45 V reach current response 7.0 at 75 °C along excellent retention stability 99%/94% after long‐term operations 30 h 10/50 . Moreover, solar‐to‐hydrogen conversion efficacy 19.96% achieved solar energy‐powered system, highlighting great potential developed toward electrolysis.

Language: Английский

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Progress in the advancement of atomically dispersed catalysts for enhanced performance lithium-sulfur batteries

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 488, P. 150719 - 150719

Published: March 29, 2024

Language: Английский

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Microenvironment Engineering of Heterogeneous Catalysts for Liquid-Phase Environmental Catalysis

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(20), P. 11348 - 11434

Published: Oct. 9, 2024

Environmental catalysis has emerged as a scientific frontier in mitigating water pollution and advancing circular chemistry reaction microenvironment significantly influences the catalytic performance efficiency. This review delves into engineering within liquid-phase environmental catalysis, categorizing microenvironments four scales: atom/molecule-level modulation, nano/microscale-confined structures, interface surface regulation, external field effects. Each category is analyzed for its unique characteristics merits, emphasizing potential to enhance efficiency selectivity. Following this overview, we introduced recent advancements advanced material system design promote (e.g., purification, transformation value-added products, green synthesis), leveraging state-of-the-art technologies. These discussions showcase was applied different reactions fine-tune regimes improve from both thermodynamics kinetics perspectives. Lastly, discussed challenges future directions engineering. underscores of intelligent materials drive development more effective sustainable solutions decontamination.

Language: Английский

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