Exfoliation of metal–organic frameworks into efficient single-layer metal–organic nanosheet electrocatalysts by the synergistic action of host–guest interactions and sonication

Pang, Wei; Lei, Lei; Tan, Xiaoqiong; Tang, Cong; Zhong, Zhiyong; Huang, Jin

doi:10.1039/c9nr09742b

Cited by 74 publications

(52 citation statements)

References 63 publications

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“…Drop-casting of the as-fabricated 2D MOF inks onto a glassy carbon electrode (GCE), fluorine-doped tin oxide (FTO) on glass, or carbon cloth (CC) is a widely used approach. [8,45,61,62] It allows efficient control of the mass loading of the catalyst on the substrate for quantitative investigation of the intrinsic catalytic OER activity. However, the interface between the substrate and the catalysts may cause considerable impedance as insulating binders are typically used in the ink, leading to reduced OER performance.…”

Section: Preparation and Characterization Of 2d Mofsmentioning

confidence: 99%

“…2D Ni-based MOFs consisting of Ni units with different organic linkers have been investigated in the past few years, as summarized in Table 1. [45,62,65] Du et al [45] utilized a phthalocyanine (Pc) unit as a key organic fragment to construct a πconjugated 2D NiPc-MOF via a bottom-up method, exhibiting a layered morphology (thickness: 100-200 nm) as confirmed by AFM. The NiPc-MOF registered an OER η of 350 mV at 10 mA cm À 2 on a fluorine-doped tin oxide (FTO) substrate.…”

Section: D Ni-based Mof Hybridsmentioning

confidence: 99%

“…Similarly, a 2D pure Ni-based MOF, which was prepared by physical exfoliation by ultra-sonicating 3D pillaredlayer MOFs ([M 2 (BDC)(dabco)] • -guest (M=Ni, BDC = 1,4-benzenedicarboxylate, dabco = 1,4-diazabicyclo-[2.2.2]octane)) in water, showed an OER η of 581 mV at 10 mA cm À 2 on CC. [62] However, there is still ample room for improvement in OER performance (Table 1). Recently, some researchers have introduced metal heteroatoms to 2D Ni MOFs as hybrid electrocatalysts, enabling improved OER performance.…”

Section: D Ni-based Mof Hybridsmentioning

confidence: 99%

“…Different electrode substrates and electrode preparation routes are employed when 2D MOF‐based materials are used for OER electrocatalysis. Drop‐casting of the as‐fabricated 2D MOF inks onto a glassy carbon electrode (GCE), fluorine‐doped tin oxide (FTO) on glass, or carbon cloth (CC) is a widely used approach [8,45,61,62] . It allows efficient control of the mass loading of the catalyst on the substrate for quantitative investigation of the intrinsic catalytic OER activity.…”

Section: Preparation and Characterization Of 2d Mofsmentioning

confidence: 99%

“…2D Ni‐based MOFs consisting of Ni units with different organic linkers have been investigated in the past few years, as summarized in Table 1 [45,62,65] . Du et al [45] .…”

Section: D Mofs For the Oermentioning

confidence: 99%

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Recent Progress of Two‐Dimensional Metal‐Organic Frameworks and Their Derivatives for Oxygen Evolution Electrocatalysis

et al. 2020

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The development of high‐performance transition metal−based electrocatalysts for the oxygen evolution reaction (OER) is paramount for electrochemical secondary metal‐air batteries and water splitting. Two‐dimensional (2D) metal‐organic framework (MOF) nanosheets have recently emerged as a novel class of efficient electrocatalysts for OER, due to a high specific surface area, ultrasmall thickness and abundance of active sites. Here, we summarize recent progress in the preparation and characterization of 2D transition metal−based MOFs (e. g. Ni, Co and Cu), as well as their composites and derivatives, including metals/alloys, metal oxides/chalcogenides and metal phosphides/hydroxides, as OER electrocatalysts reported over the past several years. Design principles and preparation routes are presented. The performance of the electrocatalysts is directly compared in terms of overpotential (η) (thermodynamics) and electrocatalytic current density (kinetics), as well as operational stability (economics). Many of these materials exhibit superior catalytic activity compared to the noble metal−based catalysts such as RuO2 (η<300 mV at 10 mA cm−2), and considerable stability with negligible decay with operation over several hours to days. Challenges and perspectives of applying 2D MOFs and their derivatives for OER electrocatalysis are also discussed.

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Section: Preparation and Characterization Of 2d Mofsmentioning

confidence: 99%

Section: D Ni-based Mof Hybridsmentioning

confidence: 99%

Section: D Ni-based Mof Hybridsmentioning

confidence: 99%

Section: Preparation and Characterization Of 2d Mofsmentioning

confidence: 99%

“…2D Ni‐based MOFs consisting of Ni units with different organic linkers have been investigated in the past few years, as summarized in Table 1 [45,62,65] . Du et al [45] .…”

Section: D Mofs For the Oermentioning

confidence: 99%

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Recent Progress of Two‐Dimensional Metal‐Organic Frameworks and Their Derivatives for Oxygen Evolution Electrocatalysis

et al. 2020

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Recent Advances in Porphyrin‐ and Phthalocyanine‐based 2D‐MOFs and 2D‐COFs for Energy Applications

Gonçalves

Safadi

Iglesias

et al. 2023

Supramolecular Nanotechnology

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Metal–Organic Framework Nanosheets: Programmable 2D Materials for Catalysis, Sensing, Electronics, and Separation Applications

Nicks¹,

Sasitharan²,

Prasad³

et al. 2021

Adv Funct Materials

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offers advantages over simple inorganic nanosheets in that a diverse range of physical and chemical properties can be programmed into their crystalline structure (Figure 1). This distinct combination of properties makes MONs ideal for a wide range of catalysis, sensing, electronics, and separation applications which will be the focus of this review.Much of the early literature in this field focused on the development of novel MON architectures and new routes towards their synthesis. A diverse range of different metal ions and organic linkers have been used to construct MONs. [4] However the field has rapidly converged on a handful of popular secondary building units (SBUs) which dominate much of the literature thanks to their reliable formation of high aspect ratio nanosheets. Popular classes of MONs that have been widely applied by different groups in applications include those based on the metal paddlewheel (PW) motif, [5][6][7] axially capped Zr and Hf clusters, [8][9][10][11] 2D zeolitic imidazolate frameworks (ZIFs), [12][13][14] and square planar Ni, Co, and Cu SBUs. [15][16][17][18] The modular structure of MONs, ease of functionalization and diverse range of materials they can be combined with means that MONs can be readily "programmed" to provide the desired topology and properties required for a given application.A wide variety of methods have been explored to synthesize MONs, either "top-down" by the exfoliation of layered metalorganic frameworks (MOFs) or "bottom-up" by assembly of molecular building blocks directly into nanosheets. The majority of top-down approaches utilize mechanical energy to overcome inter-layer interactions, such as liquid-assisted ultrasonication, [19] shear-mixing, [20] and grinding/ball-milling, [13] or the less common freeze-thaw [21] and "scotch-tape" methods. [22,23] Other methods involving photochemical, [24] electrochemical, [25] and chemical intercalation, [26] have also been developed but are less widely used. Bottom-up methodologies typically utilize surfactants or modulators to inhibit crystal growth in one dimension, [12,27,28] or layering/interfacial methods to promote anisotropic growth. [15,29,30] The use of sacrificial 2D templates has also recently emerged a promising route. [31,32] Each approach has advantages and disadvantages in terms of the thickness, lateral dimensions, size distribution, quantity and quality of the MONs produced, and the best approach therefore varies depending on the application.

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Exfoliation of metal–organic frameworks into efficient single-layer metal–organic nanosheet electrocatalysts by the synergistic action of host–guest interactions and sonication

Abstract: Rapid exfoliation of pillared-layer metal–organic frameworks into single-layer metal–organic nanosheets for a high turnover frequency of water oxidation.

Cited by 74 publications

References 63 publications

Recent Progress of Two‐Dimensional Metal‐Organic Frameworks and Their Derivatives for Oxygen Evolution Electrocatalysis

Recent Progress of Two‐Dimensional Metal‐Organic Frameworks and Their Derivatives for Oxygen Evolution Electrocatalysis

Recent Advances in Porphyrin‐ and Phthalocyanine‐based 2D‐MOFs and 2D‐COFs for Energy Applications

Metal–Organic Framework Nanosheets: Programmable 2D Materials for Catalysis, Sensing, Electronics, and Separation Applications

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