Regulating d-orbital electronic character and HER free energy of VN electrocatalyst by anchoring single atom

Feng, Jizheng; Tang, Ranxiao; Liu, Guofang; Meng, Tao

doi:10.1016/j.cej.2022.139131

Cited by 23 publications

(16 citation statements)

References 50 publications

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“…The V-O signal may be caused by airborne vanadium nitride and is consistent with the N1s spectral peak. [25,[60][61][62] Scanning electron microscope (SEM) images show the micromorphology of the samples. In Figure S6a,b (Supporting Information), the Co 2 V 2 O 7 precursor exhibits a typical hexagonal structure with intact sheets, smooth surfaces, and a diameter of about 100-200 nm.…”

Section: Resultsmentioning

confidence: 99%

Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Zhou,

Lan,

Zhang

et al. 2023

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Reasonable composition design and controllable structure are effective strategies for harmonic electromagnetic wave (EMW) adsorption of multi‐component composites. On this basis, the hybrid MoS2/CoS2/VN multilayer structure with the triple heterogeneous interface is prepared by simple stirring hydrothermal, which can satisfy the synergistic interaction between different components and obtain excellent EMW absorption performance. Due to the presence of multiple heterogeneous interfaces, MoS2/CoS2/VN composites will produce strong interfacial polarization, while the defects in the sample will become the center of polarization, resulting in dipole polarization. Due to the excellent structural design of MoS2/CoS2/VN composite material, MoS2/CoS2/VN composite material not only has good conductive loss and polarization loss, but also can maintain excellent stability in simulated seawater, and enhance corrosion resistance. The MoS2/CoS2/VN composite with dual functions of corrosion resistant and microwave absorption achieves a minimum reflection loss (RL) of −50.48 dB and an effective absorption bandwidth of up to 5.76 GHz, covering both the X‐band and Ku‐band. Finally, this study provides a strong reference for the development of EMW absorption materials based on transition metal nitrides.

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Section: Resultsmentioning

confidence: 99%

Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Zhou,

Lan,

Zhang

et al. 2023

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“…The results manifest that the double sulfurvacancy-decorated CoS 1.097 @MoS 2 has an enhanced carrier density near the Fermi level, which contributes to an improved conductivity. 38,39 In addition, CoS 1.097 @MoS 2 models for both cases without sulfur-vacancy are equally constructed for comparison (Figure S15). Thus, it can be unconditionally assumed that the synergistic effect of the heterointerface and double sulfur-vacancy can endow CoS 1.097 @MoS 2 core−shell heterojunctions with enhanced electronic conductivity to speed up the electron transfer and then accelerate the HER kinetics.…”

Section: Resultsmentioning

confidence: 99%

Engineering Double Sulfur-Vacancy in CoS_1.097@MoS₂ Core–Shell Heterojunctions for Hydrogen Evolution in a Wide pH Range

Yang,

Wen,

Liu

et al. 2023

Inorg. Chem.

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Heterostructured nanomaterials have arisen as electrocatalysts with great potential for hydrogen evolution reaction (HER), considering their superiority in integrating different active components but are plagued by their insufficient active site density in a wide pH range. In this report, double sulfur-vacancy-decorated CoS 1.097 @MoS 2 core−shell heterojunctions are designed, which contain a primary structure of hollow CoS 1.097 nanocubes and a secondary structure of ultrathin MoS 2 nanosheets. Taking advantage of the core−shell type heterointerfaces and double sulfur-vacancy, the CoS 1.097 @MoS 2 catalyst exhibits pH-universal HER performance, achieving the overpotentials at 10 mA cm −2 of 190, 139, and 220 mV in 0.5 M H 2 SO 4 , 1.0 M KOH, and 1.0 M PBS, respectively. Systematic theoretical results show that the double sulfur-vacancy can endow the CoS 1.097 @MoS 2 core−shell heterojunctions with promoted electron/mass transfer and enhanced reactive kinetics, thus boosting HER performance. This work clearly demonstrates an indispensable role of double sulfur-vacancy in enhancing the electrocatalytic HER performance of core−shell type heterojunctions under a wide pH operating condition.

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“…42 Generally, a high-efficiency HER catalyst should enable to trap protons and strip H 2 with a ΔG H* of near zero. 43,44 The top and side views of H absorption on the W and Ni sites are plotted in Figure S12.…”

Section: Resultsmentioning

confidence: 99%

Engineering Morphology and Electron Redistribution of a Ni/WO₃ Mott–Schottky Bifunctional Electrocatalyst for Efficient Alkaline Urea Splitting

Zhang,

Guo,

Graham

et al. 2023

ACS Appl. Mater. Interfaces

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Construction of the desired morphology and nanointerface to expose the active sites and modulate the electronic structure offers an effective approach to boosting urea splitting for energy-saving hydrogen generation. Herein, we fabricate a Ni/WO 3 Mott−Schottky heterojunction electrocatalyst with a hedgehog-like structure supported on Ni foam toward alkaline urea splitting. Different Ni/WO 3 morphologies, such as microspheres, hedgehog-like structures, octahedrons, and cubes, were obtained when various ratios of Ni/W feeds were used. The Mott−Schottky nanointerfaces between Ni and WO 3 domains are visually confirmed by high-resolution transmission electron microscopy images, which also accelerated the charge transfer rate. Benefiting from the high electrochemically active surface area and enhanced charge transferability, the optimal Ni/WO 3 electrode exhibits outstanding catalytic activity toward hydrogen generation with a low overpotential of 163 mV at 100 mA cm −2 in alkaline solution and reduced cell voltage of 1.67 V when coupled with urea oxidation reaction. Theoretical calculations reveal that the Ni sites in Ni/WO 3 optimize the H adsorption energy (ΔG H* ) with the |ΔG H* | value of 0.097 eV, much lower than that of Ni (0.35 eV) and WO 3 (0.235 eV). This work demonstrates important guidance in designing an efficient electrocatalyst for urea splitting.

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Regulating d-orbital electronic character and HER free energy of VN electrocatalyst by anchoring single atom

Cited by 23 publications

References 50 publications

Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Engineering Double Sulfur-Vacancy in CoS_1.097@MoS₂ Core–Shell Heterojunctions for Hydrogen Evolution in a Wide pH Range

Engineering Morphology and Electron Redistribution of a Ni/WO₃ Mott–Schottky Bifunctional Electrocatalyst for Efficient Alkaline Urea Splitting

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Regulating d-orbital electronic character and HER free energy of VN electrocatalyst by anchoring single atom

Cited by 23 publications

References 50 publications

Self‐Assembled MoS2 Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Self‐Assembled MoS2 Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Engineering Double Sulfur-Vacancy in CoS1.097@MoS2 Core–Shell Heterojunctions for Hydrogen Evolution in a Wide pH Range

Engineering Morphology and Electron Redistribution of a Ni/WO3 Mott–Schottky Bifunctional Electrocatalyst for Efficient Alkaline Urea Splitting

Contact Info

Product

Resources

About

Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Engineering Double Sulfur-Vacancy in CoS_1.097@MoS₂ Core–Shell Heterojunctions for Hydrogen Evolution in a Wide pH Range

Engineering Morphology and Electron Redistribution of a Ni/WO₃ Mott–Schottky Bifunctional Electrocatalyst for Efficient Alkaline Urea Splitting