One-step direct synthesis of layered double hydroxide single-layer nanosheets

Yu, Jingfang; Martin, Benjamin; Clearfield, Abraham; Luo, Zhiping; Sun, Luyi

doi:10.1039/c5nr01077b

Cited by 169 publications

(122 citation statements)

References 30 publications

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“…On the other hand, the ultrasmall thickness may allow a complete exchange of bulk lattice atoms if the exchange is to happen. The ultrathin Ni, NiCo (25 % Co), and NiFe (25 % Fe) LDHs were synthesized by modifying a method previously developed for the synthesis of MgAl LDH nanosheets . The samples were characterized by inductively coupled plasma‐optical emission spectrometry (ICP‐OES, Table S1), transmission electron microscopy (TEM), and atomic force microscopy (AFM; Figures S1 and S2).…”

Section: Figuresupporting

confidence: 92%

Oxygen Isotope Labeling Experiments Reveal Different Reaction Sites for the Oxygen Evolution Reaction on Nickel and Nickel Iron Oxides

et al. 2019

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Nickel iron oxide is considered ab enchmark nonprecious catalyst for the oxygen evolution reaction (OER). However,t he nature of the active site in nickel iron oxide is heavily debated. Here we report direct spectroscopic evidence for the different active sites in Fe-free and Fe-containing Ni oxides.Ultrathin layered double hydroxides (LDHs) were used as defined samples of metal oxide catalysts,a nd 18 O-labeling experiments in combination with in situ Raman spectroscopy were employed to probe the role of lattice oxygen as well as an active oxygen species,NiOO À ,inthe catalysts.Our data show that lattice oxygen is involved in the OER for Ni and NiCo LDHs,but not for NiFeand NiCoFeLDHs.Moreover,NiOO À is ap recursor to oxygen for Ni and NiCo LDHs,b ut not for NiFeand NiCoFeLDHs.These data indicate that bulk Ni sites in Ni and NiCo oxides are active and evolve oxygen via aN iOO À precursor.F ei ncorporation not only dramatically increases the activity,but also changes the nature of the active sites.

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Section: Figuresupporting

confidence: 92%

Oxygen Isotope Labeling Experiments Reveal Different Reaction Sites for the Oxygen Evolution Reaction on Nickel and Nickel Iron Oxides

et al. 2019

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“…Theultrathin Ni, NiCo (25 %Co), and NiFe( 25 %F e) LDHs were synthesized by modifying am ethod previously developed for the synthesis of MgAl LDH nanosheets. [10] Thes amples were characterized by inductively coupled plasma-optical emission spectrometry (ICP-OES,T able S1), transmission electron microscopy (TEM), and atomic force microscopy (AFM;F igures S1 and S2). Representative TEM images show that the samples consist of nanosheets with diameters of 10-50 nm.…”

Section: Electrochemicalwatersplittingprovidesaconvenientmeansmentioning

confidence: 99%

Oxygen Isotope Labeling Experiments Reveal Different Reaction Sites for the Oxygen Evolution Reaction on Nickel and Nickel Iron Oxides

et al. 2019

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Nickel iron oxide is considered a benchmark nonprecious catalyst for the oxygen evolution reaction (OER). However, the nature of the active site in nickel iron oxide is heavily debated. Here we report direct spectroscopic evidence for the different active sites in Fe‐free and Fe‐containing Ni oxides. Ultrathin layered double hydroxides (LDHs) were used as defined samples of metal oxide catalysts, and 18O‐labeling experiments in combination with in situ Raman spectroscopy were employed to probe the role of lattice oxygen as well as an active oxygen species, NiOO−, in the catalysts. Our data show that lattice oxygen is involved in the OER for Ni and NiCo LDHs, but not for NiFe and NiCoFe LDHs. Moreover, NiOO− is a precursor to oxygen for Ni and NiCo LDHs, but not for NiFe and NiCoFe LDHs. These data indicate that bulk Ni sites in Ni and NiCo oxides are active and evolve oxygen via a NiOO− precursor. Fe incorporation not only dramatically increases the activity, but also changes the nature of the active sites.

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“…For instance, a formamide/water mixture was also successfully used as a coprecipitation medium to directly prepare single LDH nanolayers in a bottom‐up strategy (rather than through a classical top‐down LDH exfoliation). The monolayer formation is explained by both the interaction between the carbonyl groups of formamide and the hydroxyl groups of the LDH layers, and suppressed electrostatic interactions between the layers due to the high dielectric constant of formamide . Similarly, fast coprecipitation in the presence of an excess of lactate anions followed by hydrothermal treatment enables the preparation of stable LDH nanolayers .…”

Section: New Trends and Strategies For Ldh And Hybrid Ldh Synthesismentioning

confidence: 99%

Tailoring Hybrid Layered Double Hydroxides for the Development of Innovative Applications

Taviot-Guého

Prévot

Forano

et al. 2017

Adv Funct Materials

217

134

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International audienceHybrid materials based on layered double hydroxides (LDHs) exhibit great potential in diverse fields such as health care, polymer composites, environment, catalysis, and energy generation. Indeed, the compositional flexibility and the scalability of LDH structures, their low cost, and their ease of synthesis have made hybrid LDHs extremely attractive for constructing smart and high-performance multifunctional materials. This review provides a comprehensive and critical overview of the current research on multifunctional hybrid LDHs. Organic–inorganic hybrid LDHs, intercalated and surface-immobilized structures, are both specifically addressed. The new trends and strategies for hybrid LDH synthesis are first described, and then the potential of the latest hybrid LDHs, polymer LDH nanocomposites, and LDH bio-nanocomposites are presented. Significant achievements published from ≈2010, including authors' results, which employ hybrid LDH assemblies in materials science, medicine, polymer nanocomposites, cement chemistry, and environmental technologies, are specifically addressed. It is concluded with remarks on present challenges and future prospects

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One-step direct synthesis of layered double hydroxide single-layer nanosheets

Cited by 169 publications

References 30 publications

Oxygen Isotope Labeling Experiments Reveal Different Reaction Sites for the Oxygen Evolution Reaction on Nickel and Nickel Iron Oxides

Oxygen Isotope Labeling Experiments Reveal Different Reaction Sites for the Oxygen Evolution Reaction on Nickel and Nickel Iron Oxides

Oxygen Isotope Labeling Experiments Reveal Different Reaction Sites for the Oxygen Evolution Reaction on Nickel and Nickel Iron Oxides

Tailoring Hybrid Layered Double Hydroxides for the Development of Innovative Applications

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