Vacancy Defects in 2D Transition Metal Dichalcogenide Electrocatalysts: From Aggregated to Atomic Configuration

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(50)

Published: Oct. 3, 2022

Abstract Vacancy defect engineering has been well leveraged to flexibly shape comprehensive physicochemical properties of diverse catalysts. In particular, growing research effort devoted chalcogen anionic vacancies (S/Se/Te) 2D transition metal dichalcogenides (2D TMDs) toward the ultimate performance limit electrocatalytic hydrogen evolution reaction (HER). spite remarkable progress achieved in past decade, systematic and in‐depth insights into state‐of‐the‐art vacancy for 2D‐TMDs‐based electrocatalysis are still lacking. Herein, this review delivers a full picture evolving from aggregated atomic configurations covering their development background, controllable manufacturing, thorough characterization, representative HER application. Of particular interest, deep‐seated correlations between specific regulation routes resulting catalytic improvement logically clarified terms rearrangement, charge redistribution, energy band variation, intermediate adsorption–desorption optimization, charge/mass transfer facilitation. Beyond that, broader vision is cast cutting‐edge fields vacancy‐engineering‐based single‐atom catalysis dynamic structure–performance across catalyst service lifetime. Together with critical discussion on residual challenges future prospects, sheds new light rational design advanced catalysts navigates application high‐efficiency conversion storage fields.

Language: Английский

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Enhanced Catalytic Performance of La-Doped CoMn₂O₄ Catalysts by Regulating Oxygen Species Activity for VOCs Oxidation

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(12), P. 8293 - 8306

Published: June 6, 2023

Tuning the oxygen species activity of transition metal oxide catalysts is essential for harnessing environmental catalytic oxidation reactions, and mobility lattice activation ability gas over CoMn2O4 were well modulated by in situ solvothermal-induced lanthanum doping VOCs oxidation. Lanthanum successfully doped into spinel lattice, toluene rate Co1Mn1.9La0.1 increased 20.74 times compared with that undoped Co1Mn2 catalyst at 220 °C. With doping, content vacancies was remarkably (1.4-fold) due to atoms unusual bonding situations. Higher reactivity achieved weakening metal–oxygen bond strength, favoring conversion CO2 H2O. Furthermore, also promoted replenishment oxygen. Moreover, anhydride species, as a rate-determining step, could be significantly accelerated doping. This work provided credible comprehension regulation abatement improve atmospheric environment.

Language: Английский

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In Situ Immobilizing Atomically Dispersed Ru on Oxygen-Defective Co₃O₄ for Efficient Oxygen Evolution

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(4), P. 2462 - 2471

Published: Feb. 2, 2023

The synergistic regulation of the electronic structures transition-metal oxide-based catalysts via oxygen vacancy defects and single-atom doping is efficient to boost their evolution reaction (OER) performance, which remains challenging due complex synthetic procedures. Herein, a facile defect-induced in situ deposition strategy developed anchor atomically dispersed Ru onto vacancy-rich cobalt oxides (Ru/Co3O4–x) based on spontaneous redox between Ru3+ ions nonstoichiometric Co3O4–x. Accordingly, as-prepared Ru/Co3O4–x electrocatalyst with coexistence vacancies atoms exhibits excellent performances toward OER low overpotential 280 mV at 10 mA cm–2, small Tafel slope value 86.9 dec–1, good long-term stability alkaline media. Furthermore, density functional theory calculations uncover that could synergistically tailor electron decentralization d-band center Co atoms, further optimizing adsorption oxygen-based intermediates (*OH, *O, *OOH) reducing barriers OER. This work proposes an available for constructing electrocatalysts abundant noble metal presents deep understanding engineering transition-metal-based evolution.

Language: Английский

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Applications of vacancy defect engineering in persulfate activation: Performance and internal mechanism

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 449, P. 130971 - 130971

Published: Feb. 10, 2023

Language: Английский

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Recent Advances of VOCs Catalytic Oxidation over Spinel Oxides: Catalyst Design and Reaction Mechanism

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(26), P. 9495 - 9514

Published: June 14, 2023

Volatile organic compounds (VOCs) harm the environment and human health have been of wide concern purified efficiently by catalytic oxidation. Spinel oxides, mainly composed transition metal elements with low price extensive sources, widely investigated as efficient stable catalysts for VOCs oxidation due to their adjustable element composition, flexible structure, high thermal/chemical stability. However, it is necessary dissect design spinel in a targeted way satisfy removal different types VOCs. This article systematically summarizes recent advances regarding application oxides Specifically, strategies were first introduced clarify effect on structure properties catalyst. Then reaction mechanism degradation pathway kinds detail summarized, characteristic requirements various purification analyzed. Furthermore, practice applications also discussed. Finally, prospects proposed guide rational spinel-based intensify understanding mechanisms.

Language: Английский

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Effect of the acid site in the catalytic degradation of volatile organic compounds: A review

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 454, P. 140125 - 140125

Published: Nov. 2, 2022

Language: Английский

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Electron transfer-mediated enhancement of superoxide radical generation in fenton-like process: Key role of oxygen vacancy-regulated local electron density of cobalt sites

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 343, P. 123490 - 123490

Published: Nov. 10, 2023

Language: Английский

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Boosting simultaneous catalytic removal of NOx and toluene via cooperation of Lewis acid and oxygen vacancies

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 331, P. 122696 - 122696

Published: March 27, 2023

Language: Английский

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Oxygen vacancy engineering on copper-manganese spinel surface for enhancing toluene catalytic combustion: A comparative study of acid treatment and alkali treatment

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 340, P. 123142 - 123142

Published: Aug. 1, 2023

Language: Английский

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A Comprehensive Review on the Boosted Effects of Anion Vacancy in the Heterogeneous Photocatalytic Degradation, Part II: Focus on Oxygen Vacancy

ACS Omega, Journal Year: 2024, Volume and Issue: 9(6), P. 6093 - 6127

Published: Feb. 5, 2024

Environmental problems, including the increasingly polluted water and energy crisis, have led to a need propose novel strategies/methodologies contribute sustainable progress enhance human well-being. For these goals, heterogeneous semiconducting-based photocatalysis is introduced as green, eco-friendly, cost-effective, effective strategy. The introduction of anion vacancies in semiconductors has been well-known an strategy for considerably enhancing photocatalytic activity such systems, giving them advantages promoting light harvesting, facilitating photogenerated electron-hole pair separation, optimizing electronic structure, yield reactive radicals. This Review will introduce effects vacancy-dominated photodegradation systems. Then, their mechanism illustrate how vacancy changes pathway degradation efficiency toward pollutants overall performance. Specifically, defect types methods tailoring be briefly illustrated, this part focus on oxygen (OV) its recent advances. challenges development issues engineered defects photocatalysts also discussed practical applications provide promising research direction. Finally, some prospects emerging field proposed suggested. All permission numbers adopted figures from literature are summarized separate file Editor.

Language: Английский

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