<i>In situ</i> synthesis of quasi-needle-like bimetallic organic frameworks on highly porous graphene scaffolds for efficient electrocatalytic water oxidation

Khiarak, Behnam Nourmohammadi; Hasanzadeh, Mahdi; Mojaddami, Majdoddin; Far, Hossein Shahriyar; Simchi, A.

doi:10.1039/c9cc09908e

Cited by 53 publications

(30 citation statements)

References 36 publications

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“…MOFs/3DG) composite was synthesized via in situ synthesis of quasi-needle-like bimetallic MOFs on graphene and exhibited increased active surface area and active sites (Figure 8a). [93] Recently, various categories of nanocomposites containing CMs have been applied to effluent remediation. Thus, retrospecting the process of MOFs/CMs composites has important value to make innovations in industrial wastewater treatment.…”

Section: Mof@carbon Materialsmentioning

confidence: 99%

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Applications of Metal‐Organic Frameworks in Water Treatment: A Review

Yang

Kai-liang

et al. 2021

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ions, synthetic dyes, antibiotics, and other substances in groundwater and wastewater discharged from factories have caused serious harm to the environment and human health. Therefore, it is vital to develop efficient water pollution treatment methods.The heavy metal ions discharged from factories into rivers and lakes can cause diffusion and pollution. Highly toxic heavy metal ions are easy to accumulate in organisms because they are not biodegradable. [1] Organic dyes and radioactive pollutants produced in industrial production will diffuse into soil and water resources, endangering the safety of animals, plants and human life. [2] The leakage of antibiotics in the fields of biology and medicine will destroy the balance and stability of the ecosystem. [3] An enormous number of pollutants are persistent and difficult to degrade. Scientists have been committed to developing various technologies and materials for removing pollutants from water environment. Nevertheless, effectively purifying sewage still remains a tough challenge.Various techniques are used for sewage purification to remove pollutants in the environment. Common methods include separation, [4] absorption, [5] photocatalytic degradation, [6] and membrane filtration. [7] However, traditional absorbents and catalysts such as zeolites, activated carbons, organic resins, etc. have poor pollutant removal capabilities. [8] Traditional adsorbents, such as carbons and clay minerals, exhibit weak ionic affinity and low adsorption efficiency for metals. [9] Furthermore, partial catalysts possess inferior charge separation efficiency, recyclability, and chemical stability, which is likely to cause secondary pollution to water sources, and does not meet the requirements of green, energy saving, and renewable in the field of modern environment protection. [10] Therefore, researchers have been trying to exploit an efficient and economical composite material with superb specific surface area, high separation and strong reusability. [11] Metal-organic framework (MOF) is a new type of composite material self-assembled by metal ions or metal clusters and organic linkers. [12] As a novel type porous material, MOF has adjustable pore size, superior specific surface area and excellent porosity, and its performance is more superiority than traditional materials such as zeolite and clay. [13] They have raisedThe ever-expanding scale of industry and agriculture has led to the gradual increase of pollutants (e.g., heavy metal ions, synthetic dyes, and antibiotics) in water resources, and the ecology and wastewater are grave problems that need to be solved urgently and has attracted widespread attention from the research community and industry in recent years. Metal-organic frameworks (MOFs) are a type of organic-inorganic hybrid material with a distinctive 3D network crystal structure. Lately, MOFs have made striking progress in the fields of adsorption, catalytic degradation, and biomedicine on account of their large specific surface and well-developed pore structure. This...

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Section: Mof@carbon Materialsmentioning

confidence: 99%

Section: Mof@carbon Materialsmentioning

confidence: 99%

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Applications of Metal‐Organic Frameworks in Water Treatment: A Review

Yang

Kai-liang

et al. 2021

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117

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“…In another study, a highly active Co x Ni 1Àx MOF/3DG electrocatalyst was prepared by a similar method for the OER, which exhibited a high catalytic activity attributed to the synergistic effect of Co and Ni in MOFs and the 3D structure of graphene. 238 Besides, various MOF/graphene-derived composites (e.g., metal or alloys, 44,239 oxides, 131,133,136,139 suldes, 153,154 phosphides, 45,[166][167][168][169]172 nitrides, 180 etc. 157 ) have been demonstrated as active OER electrocatalysts.…”

Section: Oxygen Evolution and Reduction Reactions (Oer And Orr)mentioning

confidence: 99%

Recent progress in metal–organic framework/graphene-derived materials for energy storage and conversion: design, preparation, and application

Wang

Hui

et al. 2021

Chem. Sci.

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“…However, electrochemical water splitting to produce hydrogen has become a research hotspot due to the simple process equipment and the high purity of the hydrogen generated [3] . The electrolysis of water consists of an anodic oxygen evolution reaction (OER) and a cathodic hydrogen evolution reaction (HER) [4] . The anodic OER requires a multi‐electron‐transfer process and can generate a large overpotential; it consumes a large amount of energy to overcome the slow kinetic process, making this the rate‐limiting step, which seriously hinders the practical application of water electrolysis [5] .…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Dual‐MOF Heterostructure (ZIF@MIL) for Enhanced Oxygen Evolution Reaction Activity

Zhao

Wang

Cheng

et al. 2020

Chemistry An Asian Journal

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Although metal‐organic frameworks have proven to be excellent electrocatalytic materials, their application as electrode materials remains limited. The preparation of heterostructures is considered an effective method to improve catalytic activity. Herein, we describe the design and assembly of a dual‐MOF heterostructure (CoNi−ZIF‐67@Fe−MIL‐100, denoted ZIF@MIL). Specifically, we grew a layer of MIL‐100 in situ on a bimetallic ZIF‐67 surface using a solvothermal method. We demonstrate that the ZIF@MIL has remarkable OER electrocatalytic performance, requiring a low overpotential and showing a small Tafel slope, compared to pure ZIF‐67 and MIL‐100 in 1.0 m KOH. More importantly, it has excellent operational durability for 50 h at 100 mA cm−2. The high catalytic activity of ZIF@MIL can be attributed to the heterostructure that can expose more active sites, the synergistic effect between ZIF‐67 and MIL‐100, and improvement of electron transfer ability. Our work provides a new way to design and prepare dual‐MOF crystals with different structures as electrocatalysts.

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In situ synthesis of quasi-needle-like bimetallic organic frameworks on highly porous graphene scaffolds for efficient electrocatalytic water oxidation

Abstract: We present enhanced electrocatalytic activity of three-dimensional graphene scaffolds by decoration with one-dimensional CoxNi1−x MOF nanostructures (0 ≤ x ≤ 1).

Cited by 53 publications

References 36 publications

Applications of Metal‐Organic Frameworks in Water Treatment: A Review

Applications of Metal‐Organic Frameworks in Water Treatment: A Review

Recent progress in metal–organic framework/graphene-derived materials for energy storage and conversion: design, preparation, and application

Preparation of a Dual‐MOF Heterostructure (ZIF@MIL) for Enhanced Oxygen Evolution Reaction Activity

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