Electronic modulation induced by oxygen vacancy creating in copper oxides toward accelerated hydrogenation kinetics of nitroaromatics

Geng, Longlong; Zhang, Qing; Wang, Xiaoli; Han, Haixiang; Zhang, Yong-Zheng; Li, Chunhui; Li, Zhen; Zhang, Da-Shuai; Zhang, Xiuling; Abdukayum, Abdukader; Hu, Guangzhi

doi:10.1016/j.apcatb.2023.123575

Applied Catalysis B: Environmental

2024

DOI: 10.1016/j.apcatb.2023.123575

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Electronic modulation induced by oxygen vacancy creating in copper oxides toward accelerated hydrogenation kinetics of nitroaromatics

Longlong Geng,

Qing Zhang,

Xiaoli Wang

et al.

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Cited by 12 publications

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Boosting Efficient Alkaline Hydrogen Evolution Reaction of CoFe‐Layered Double Hydroxides Nanosheets via Co‐Coordination Mechanism of W‐Doping and Oxygen Defect Engineering

Wang,

Wu,

et al. 2024

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While surface defects and heteroatom doping exhibit promising potential in augmenting the electrocatalytic hydrogen evolution reaction (HER), their performance remains unable to rival that of the costly Pt‐based catalysts. Yet, the concurrent modification of catalysts by integrating both approaches stands as a promising strategy to effectively address the aforementioned limitation. In this work, tungsten dopants are introduced into self‐supported CoFe‐layered double hydroxides (LDH) on nickel foam using a hydrothermal method, and oxygen vacancies (Ov) are further introduced through calcination. The analysis results demonstrated that tungsten doping reduces the Ov formation energy of CoFeW‐LDH. The Ov acted as oxophilic sites, facilitating water adsorption and dissociation, and reducing the barrier for cleaving HO─H bonds from 0.64 to 0.14 eV. Additionally, Ov regulated the electronic structure of CoFeW‐LDH to endow optimized hydrogen binding ability on tungsten atoms, thereby accelerating alkaline Volmer and Heyrovsky reaction kinetics. Specifically, the abundance of Ov induced a transition of tungsten from a six‐coordinated to highly active four‐coordinated structure, which becomes the active site for HER. Consequently, an ultra‐low overpotential of 41 mV at 10 mA cm−2, and a low Tafel slope of 35 mV dec−1 are achieved. These findings offer crucial insights for the design of efficient HER electrocatalysts.

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Boosting Efficient Alkaline Hydrogen Evolution Reaction of CoFe‐Layered Double Hydroxides Nanosheets via Co‐Coordination Mechanism of W‐Doping and Oxygen Defect Engineering

Wang,

Wu,

et al. 2024

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Modulating the Moderate d‐Band Center of Indium in InVO₄ Nanobelts by Synergizing MnO_x and Oxygen Vacancies for High‐Efficiency CO₂ Photoreduction

Li,

Liu,

et al. 2024

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Modulating the electronic properties of transition metal sites in photocatalysts at the atomic level is essential for achieving high‐activity carbon dioxide photoreduction (CO2PR). An electronic strategy is herein proposed to engineer In‐d‐band center of InVO4 by incorporating MnOx nanoparticles and oxygen vacancies (VO) into holey InVO4 nanobelts (MnOx/VO‐InVO4), which synergistically modulates the In‐d‐band center to a moderate level and consequently leads to high‐efficiency CO2PR. The MnOx/VO‐InVO4 catalyst with optimized electronic property exhibits a single carbon evolution rate of up to 145.3 µmol g−1 h−1 and a carbon monoxide (CO) product selectivity of 92.6%, coming out in front of reported InVO4‐based materials. It is discovered that the modulated electronic property favors the interaction between the In sites and their intermediates, which thereby improves the thermodynamics and kinetics of the CO2PR‐to‐CO reaction. This work not only demonstrates the effective engineering of the d orbital of the low‐coordination In atoms to promote CO2PR, but also paves the way for the application of tuning d‐band center to develop high‐efficiency catalysts.

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Defect engineering on constructing surface active sites in catalysts for environment and energy applications

Cai,

Hu,

Wang

2024

Front. Chem. Sci. Eng.

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Electronic modulation induced by oxygen vacancy creating in copper oxides toward accelerated hydrogenation kinetics of nitroaromatics

Cited by 12 publications

References 57 publications

Boosting Efficient Alkaline Hydrogen Evolution Reaction of CoFe‐Layered Double Hydroxides Nanosheets via Co‐Coordination Mechanism of W‐Doping and Oxygen Defect Engineering

Boosting Efficient Alkaline Hydrogen Evolution Reaction of CoFe‐Layered Double Hydroxides Nanosheets via Co‐Coordination Mechanism of W‐Doping and Oxygen Defect Engineering

Modulating the Moderate d‐Band Center of Indium in InVO₄ Nanobelts by Synergizing MnO_x and Oxygen Vacancies for High‐Efficiency CO₂ Photoreduction

Defect engineering on constructing surface active sites in catalysts for environment and energy applications

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Electronic modulation induced by oxygen vacancy creating in copper oxides toward accelerated hydrogenation kinetics of nitroaromatics

Cited by 12 publications

References 57 publications

Boosting Efficient Alkaline Hydrogen Evolution Reaction of CoFe‐Layered Double Hydroxides Nanosheets via Co‐Coordination Mechanism of W‐Doping and Oxygen Defect Engineering

Boosting Efficient Alkaline Hydrogen Evolution Reaction of CoFe‐Layered Double Hydroxides Nanosheets via Co‐Coordination Mechanism of W‐Doping and Oxygen Defect Engineering

Modulating the Moderate d‐Band Center of Indium in InVO4 Nanobelts by Synergizing MnOx and Oxygen Vacancies for High‐Efficiency CO2 Photoreduction

Defect engineering on constructing surface active sites in catalysts for environment and energy applications

Contact Info

Product

Resources

About

Modulating the Moderate d‐Band Center of Indium in InVO₄ Nanobelts by Synergizing MnO_x and Oxygen Vacancies for High‐Efficiency CO₂ Photoreduction