Dual role of Fe boost lattice oxygen oxidation of Mo-based materials from kinetics and thermodynamics

Liu, Qingcui; Su, Qiaohong; Cheng, Wenhua; Ding, Juan; Zhang, Wenjun; Wang, Jiulin; Wang, Yonggang; Wang, Xingchao; Huang, Yudai

doi:10.1016/j.apcatb.2023.123188

Applied Catalysis B: Environmental

2024

DOI: 10.1016/j.apcatb.2023.123188

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Dual role of Fe boost lattice oxygen oxidation of Mo-based materials from kinetics and thermodynamics

Qingcui Liu,

Qiaohong Su,

Wenhua Cheng

et al.

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Cited by 10 publications

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Lattice Oxygen Redox Mechanisms in the Alkaline Oxygen Evolution Reaction

Ren,

Zhai,

Yang

et al. 2024

Adv Funct Materials

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Understanding of fundamental mechanism and kinetics of the oxygen evolution reaction (OER) is pivotal for designing efficient OER electrocatalysts owing to its key role in electrochemical energy conversion devices. In the past few years, the lattice oxygen oxidation mechanism (LOM) arising from the anodic redox chemistry has attracted significant attention as it involves a direct O─O coupling and thus bypasses thermodynamic limitations in the traditional adsorbate evolution mechanism (AEM). Transition metal‐based oxyhydroxides are generally acknowledged as the real catalytic phase in alkaline media. In particular, their low‐dimensional layered structures offer sufficient structural flexibility to trigger the LOM. Herein, a comprehensive overview is provided for recent advances in anion redox from LOM‐based electrocatalysts. Based on analyses of electronic structure of electrocatalysts and LOM, a strategy is proposed to activate LOM. Possible identification techniques for corroboration of the oxygen redox are also reviewed. In addition, the structural reconstruction process induced by the LOM is focused and the importance of multiple in situ/operando characterizations is highlighted to unveil the structural and chemical origins of the LOM. To conclude, a prospect on the remaining challenges and future opportunities for LOM electrocatalysts is presented.

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Lattice Oxygen Redox Mechanisms in the Alkaline Oxygen Evolution Reaction

Ren,

Zhai,

Yang

et al. 2024

Adv Funct Materials

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Constructing Ru‐O‐TM Bridge in NiFe‐LDH Enables High Current Hydrazine‐assisted H₂ Production

Zhu,

Chen,

Feng

et al. 2024

Advanced Materials

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Hydrazine oxidation‐assisted water splitting is a critical technology to tackle the high energy consumption in large‐scale H2 production. Ru‐based electrocatalysts hold promise for synergetic hydrogen reduction (HER) and hydrazine oxidation (HzOR) catalysis but are hindered by excessive superficial adsorption of reactant intermediate. Herein, we design Ru cluster anchoring on NiFe‐LDH (denoted as Ruc/NiFe‐LDH), which effectively enhances the intermediate adsorption capacity of Ru by constructing Ru‐O‐Ni/Fe bridges. Notably, it achieves an industrial current density of 1 A cm−2 at an unprecedentedly low voltage of 0.43 V, saving 3.94 kWh m−3H2 in energy, and exhibits remarkable stability over 120 hours at a high current density of 5 A cm−2. Advanced characterizations and theoretical calculation reveal that the presence of Ru‐O‐Ni/Fe bridges widens the d‐band width of the Ru cluster, leading to lower d‐band center and higher electron occupation on antibonding orbitals, thereby facilitating moderate adsorption energy and enhanced catalytic activity of Ru.This article is protected by copyright. All rights reserved

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Dual role of sulfur doping in NiCr LDH for water oxidation: Promoting surface reconfiguration and lattice oxygen oxidation

Su,

Wang,

Liu

et al. 2024

Applied Catalysis B: Environment and Energy

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Dual role of Fe boost lattice oxygen oxidation of Mo-based materials from kinetics and thermodynamics

Cited by 10 publications

References 36 publications

Lattice Oxygen Redox Mechanisms in the Alkaline Oxygen Evolution Reaction

Lattice Oxygen Redox Mechanisms in the Alkaline Oxygen Evolution Reaction

Constructing Ru‐O‐TM Bridge in NiFe‐LDH Enables High Current Hydrazine‐assisted H₂ Production

Dual role of sulfur doping in NiCr LDH for water oxidation: Promoting surface reconfiguration and lattice oxygen oxidation

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Dual role of Fe boost lattice oxygen oxidation of Mo-based materials from kinetics and thermodynamics

Cited by 10 publications

References 36 publications

Lattice Oxygen Redox Mechanisms in the Alkaline Oxygen Evolution Reaction

Lattice Oxygen Redox Mechanisms in the Alkaline Oxygen Evolution Reaction

Constructing Ru‐O‐TM Bridge in NiFe‐LDH Enables High Current Hydrazine‐assisted H2 Production

Dual role of sulfur doping in NiCr LDH for water oxidation: Promoting surface reconfiguration and lattice oxygen oxidation

Contact Info

Product

Resources

About

Constructing Ru‐O‐TM Bridge in NiFe‐LDH Enables High Current Hydrazine‐assisted H₂ Production