Ultrathin two-dimensional layered metal hydroxides: an emerging platform for advanced catalysis, energy conversion and storage

Yin, Huajie; Tang, Zhiyong

doi:10.1039/c6cs00343e

Cited by 410 publications

(258 citation statements)

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“…In this case, a wider operating voltage can be achieved, which leads to a higher energy density [12,13]. interest because of the high redox reaction activity, relatively low cost, and environmentally friendly features [14][15][16]. It has been reported that the electrical double-layer and Faradaic reactions can be simultaneously achieved in the abundant slabs or electrochemical active sites of the LDH structure.…”

Section: Introductionmentioning

confidence: 94%

Hierarchical ultrathin NiAl layered double hydroxide nanosheet arrays on carbon nanotube paper as advanced hybrid electrode for high performance hybrid capacitors

Zhang

Chen

Hui

et al. 2017

Chemical Engineering Journal

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To effectively improve the power density and rate capability of layered double hydroxide (LDH) based supercapacitors, a hybrid supercapacitor (HSC) comprising of hierarchical ultrathin NiAl-LDH nanosheet arrays on carbon nanotube paper (CNP-LDH) is developed with porous graphene nanosheets as the negative electrode for the first time. SEM image shows that hierarchical NiAl LDH nanosheet arrays are assembled by numerous ultrathin nanosheets with thickness of a few to tens of nanometers. Remarkably, with an operating voltage of 1.6 V, the * Corresponding author.E-mail address: bizhui@umac.mo (Kwun Nam Hui), k.hui@uea.ac.uk (Kwan San Hui) 1 These authors contributed equally to this work. Even at a fast discharging time of 3.9 s, a high energy density (23.3 Wh kg -1 ) could also be retained at a power density of 21.5 kW kg -1 . Moreover, the HSC exhibits cycling stability with a retention rate of 78% after 5000-cycle charge-discharge test at 5 A g -1 . The results inspire us to propose our high-performance CNP-LDH as a promising electrode for energy storage applications.

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Section: Introductionmentioning

confidence: 94%

Hierarchical ultrathin NiAl layered double hydroxide nanosheet arrays on carbon nanotube paper as advanced hybrid electrode for high performance hybrid capacitors

Zhang

Chen

Hui

et al. 2017

Chemical Engineering Journal

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“…gases and vapors such as nitrogen oxides, acetone, and ethanol [10]. 2D layered materials have been also used as precursors for obtaining thin two-dimensional metal oxides [11][12][13].…”

Section: Factors Influencing the Gas Sensing Characteristics Of Thin mentioning

confidence: 99%

“…LDHs structure exhibits a pathway facilitating carrier diffusion/transportation, therefore they received considerable attention for direct potential applications in gas sensors for monitoring a wide class of gases and vapors such as nitrogen oxides, acetone, and ethanol [10]. 2D layered materials have been also used as precursors for obtaining thin two-dimensional metal oxides [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Thin 2D: The New Dimensionality in Gas Sensing

Neri

2017

Chemosensors

113

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Abstract:Since the first report of graphene, thin two-dimensional (2D) nanomaterials with atomic or molecular thicknesses have attracted great research interest for gas sensing applications. This was due to the distinctive physical, chemical, and electronic properties related to their ultrathin thickness, which positively affect the gas sensing performances. This feature article discusses the latest developments in this field, focusing on the properties, preparation, and sensing applications of thin 2D inorganic nanomaterials such as single-or few-layer layered double hydroxides/transition metal oxides/transition metal dichalcogenides. Recent studies have shown that thin 2D inorganic nanomaterials could provide monitoring of harmful/toxic gases with high sensitivity and a low concentration detection limit by means of conductometric sensors operating at relatively low working temperatures. Promisingly, by using these thin 2D inorganic nanomaterials, it may open a simple way of improving the sensing capabilities of conductometric gas sensors.

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“…As shown in Figure 7, almost complete dye degradation can be achieved within 320 min, 140 min, and 5 min for RB, MB, and CV, respectively. Their degradation products have been detected and identified as non-or less-toxic anions such as SO 4 2− , NO hydro-desulfurization (HDS) processes employed for the removal of DBT, 4,6-DMDBT and BT etc. are quite challenging.…”

Section: Oxidation Catalystmentioning

confidence: 99%

Polyoxometalate (POM)-Layered Double Hydroxides (LDH) Composite Materials: Design and Catalytic Applications

Miras

Song

2017

Catalysts

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Layered double hydroxides (LDHs) are an important large class of two-dimensional (2D) anionic lamellar materials that possess flexible modular structure, facile exchangeability of inter-lamellar guest anions and uniform distribution of metal cations in the layer. Owing to the modular accessible gallery and unique inter-lamellar chemical environment, polyoxometalates (POMs) intercalated with LDHs has shown a vast array of physical properties with applications in environment, energy, catalysis, etc. Here we describe how polyoxometalate clusters can be used as building components for the construction of systems with important catalytic properties. This review article mainly focuses on the discussion of new synthetic approaches developed recently that allow the incorporation of the element of design in the construction of a fundamentally new class of materials with pre-defined functionalities in catalytic applications. Introducing the element of design and taking control over the finally observed functionality we demonstrate the unique opportunity for engineering materials with modular properties for specific catalytic applications.Keywords: layered double hydroxides; polyoxometalates; intercalated materials Layered Double Hydroxides (LDHs)-Intro BackgroundLayered double hydroxides (LDHs) or hydrotalcite-like compounds are a large family of two-dimensional (2D) anionic clay materials made up of positively charged brucite-like layers with an interlayer region containing charge compensating anions and solvation molecules, which can be represented by the general formula -4]. As shown in Figure 1 and generally in the range of 0.20-0.33, which occupy the space between the layers compensating for the positive charge and inducing stability in the overall structure [5,6]. The M II /M III -based edge shared octahedra are used to construct 2D infinite sheets, whereas hydroxyl groups are organized on the vertices of the octahedra with the hydrogen atoms pointing toward the interlayer region, as a consequence forming a complex network of hydrogen bonds with the interlayer anions and water molecules [1,[7][8][9][10]. LDH-based materials are very attractive systems due to their robust structure,

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Ultrathin two-dimensional layered metal hydroxides: an emerging platform for advanced catalysis, energy conversion and storage

Cited by 410 publications

References 50 publications

Hierarchical ultrathin NiAl layered double hydroxide nanosheet arrays on carbon nanotube paper as advanced hybrid electrode for high performance hybrid capacitors

Hierarchical ultrathin NiAl layered double hydroxide nanosheet arrays on carbon nanotube paper as advanced hybrid electrode for high performance hybrid capacitors

Thin 2D: The New Dimensionality in Gas Sensing

Polyoxometalate (POM)-Layered Double Hydroxides (LDH) Composite Materials: Design and Catalytic Applications

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