Defect-rich high-entropy oxide nanospheres anchored on high-entropy MOF nanosheets for oxygen evolution reaction

Liu, Zhaoshun; Xu, Junli; Zhang, Fang; J, Lu; Shi, Zhongning

doi:10.1016/j.ijhydene.2022.12.333

Cited by 30 publications

(10 citation statements)

References 61 publications

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“…83 Defects can introduce energy levels within the MOFs' electronic band structure, leading to altered charge transfer and electronic interactions. 84 These changes can enhance the affinity of the MOFs for specic analytes, resulting in increased selectivity and sensitivity. 85 However, it's essential to note that defects can induce structural strain, which imparts mechanical exibility to MOFs.…”

Section: Defective Mofs: Advancing Sensor Innovationsmentioning

confidence: 99%

Defect-containing metal–organic framework materials for sensor applications

An,

Chen,

Liang

et al. 2024

J. Mater. Chem. A

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Section: Defective Mofs: Advancing Sensor Innovationsmentioning

confidence: 99%

Defect-containing metal–organic framework materials for sensor applications

An,

Chen,

Liang

et al. 2024

J. Mater. Chem. A

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“…In order to further investigate the changes in elemental valence states of pure ZSM-5 and Mn−Co3O4/meso−ZSM-5 catalysts and to verify the active site role of Co 3+ in the catalytic process, XPS testing was conducted on the samples. The characteristic peaks of Co 2p and Mn 2p are marked in Figure 8 [41][42][43][44]. It can be observed that the ZSM-5 zeolite does not contain any Co or Mn elements prior to loading, yet these elements become apparent in Mn−Co3O4/meso−ZSM-5-6.67 catalyst, thereby indicating that the Co and Mn elements have been successfully loaded onto the ZSM-5 zeolite.…”

Section: Scheme 2 the Reaction Mechanism Of Methane Catalytic Oxidati...mentioning

confidence: 99%

In Situ Growth of Mn-Co3O4 on Mesoporous ZSM-5 Zeolite for Boosting Lean Methane Catalytic Oxidation

Zhang,

Wei,

Yang

et al. 2024

Catalysts

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The low-temperature oxidation of methane gas in coal mine exhaust gas is important for reducing the greenhouse effect and protecting the environment. Unfortunately, the carbon–hydrogen bonds in methane molecules are highly stable, requiring higher reaction temperatures to achieve effective catalytic oxidation. However, metal oxide-based catalysts face the problem of easy sintering and the deactivation of active components at high temperatures, which is an important challenge that catalysts need to overcome in practical applications. In this work, a series of Mn-Co3O4 active components were grown in situ on ZSM-5 zeolite with mesoporous pore structures treated with an alkaline solution via a hydrothermal synthesis method. Due to the presence of polyethylene glycol as a structure-directing agent, manganese can be uniformly doped into the Co3O4 lattice. The large specific surface area of ZSM-5 zeolite allows the active component Mn-Co3O4 to be uniformly dispersed, effectively preventing the sintering and growth of active component particles during the catalytic reaction process. It is worth mentioning that the Mn-Co3O4/meso-ZSM-5-6.67 catalyst has a methane conversion rate of up to 90% at a space velocity of 36,000 mL·g−1·h−1 and a reaction temperature of 363 °C. This is mainly due to the mesoporous ZSM-5 carrier with a high specific surface area, which is conducive to the adsorption and mass transfer of reaction molecules. The active component has an abundance of oxygen vacancies, which is conducive to the activation of reaction molecules and enhances its catalytic activity, which is even higher than that of noble metal-based catalysts. The new ideas for the preparation of metal oxide-based low-temperature methane oxidation catalysts proposed in this work are expected to provide new solutions for low-temperature methane oxidation reactions and promote technological progress in related fields.

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“…Serving as the conduction and bridging for electronic flow between the electrode and external battery terminal [5], the current collector must exhibit high electronic conductivity, minimal solubility, and excellent corrosion resistance. Research has explored metal-based and carbon-based materials for current collectors across various applications, including membrane separation [6], catalysis [7], wastewater treatment [8], and CO2 reduction and adsorption [9], with designs (rod-shaped, sheet-shaped, mesh-shaped, foil-shaped, foam, etching, coating) tailored to achieve desired performance such as conductivity, structure, porosity, surface area.…”

Section: Introductionmentioning

confidence: 99%

Enhancing cycling stability in NaǁZn liquid metal batteries with Fe- based foam negative current collectors

Zhang,

Xu,

Liu

et al. 2024

Preprint

Self Cite

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The corrosion resistance of the current collector seriously affects the capacity and stable cycling of liquid metal batteries (LMBs). This investigation explores the interface reactions and electrochemical properties between Ni-Fe and Fe foam negative current collectors and the liquid negative metals in Na|NaCl-CaCl2|Zn LMB. The results elucidate that Ni-Fe foam is erroded and the corrosion products of Ca2Ni5, and Ni2Zn11 are formed on the surface. It accelerates the deposition of Zn and the dissolution of Ni-Fe matrix, thereby leads to a decreation in discharge capacity of the battery. Specifically, the Na/NF‖Zn LMB exhibits a capacity degradation rate of 0.12% over 80 cycles at a current density of 100 m A cm− 2. However, the emergence of a Fe-Zn alloy on the Fe foam augments the corrosion resistance of the collector and the lifespan of the battery. This is evidenced by the Na/F‖Zn LMB maintaining 97.2% of its initial capacity after 328 cycles, which translates to a minuscule capacity attenuation rate of merely 0.00854%/ per cycle. This study further improves the perfomence of the negative current collector for NaǁZn LMBs, and provids a better candidate materials for the large-scale application of energy storage batteries.

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Defect-rich high-entropy oxide nanospheres anchored on high-entropy MOF nanosheets for oxygen evolution reaction

Cited by 30 publications

References 61 publications

Defect-containing metal–organic framework materials for sensor applications

Defect-containing metal–organic framework materials for sensor applications

In Situ Growth of Mn-Co3O4 on Mesoporous ZSM-5 Zeolite for Boosting Lean Methane Catalytic Oxidation

Enhancing cycling stability in NaǁZn liquid metal batteries with Fe- based foam negative current collectors

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