Nickel–iron layered double hydroxide (LDH): Textural properties upon hydrothermal treatments and application on dye sorption

Saiah, Fatiha Boukraa Djellal; Su, Bao‐Lian; Bettahar, Noureddine

doi:10.1016/j.jhazmat.2008.09.125

Cited by 153 publications

(54 citation statements)

References 47 publications

(63 reference statements)

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“…[28] Ni 2 Co III Fe-LDH grown on the surface of N-GO effectively prevented itself from aggregation, resulting in more amount of Ni 2 Co III Fe-LDH edge sites exposed to electrolyte. The surface area (SA) [29] of the composite was calculated by the Brunauer-Emmet-Teller [30] theory (Table S1, Supporting Information) to be 161.27 m 2 g −1 , which was significantly larger than that of pure LDH and Ni 2 CoFe-LDH+GO. [20] The N 2 -adsorption/desorption measurements were carried out to obtain a better understanding of the structure and to study the surface area and pore sizes of Ni 2 Co III Fe-LDH/N-GO composite.…”

Section: Resultsmentioning

confidence: 99%

NiCoFe‐Layered Double Hydroxides/N‐Doped Graphene Oxide Array Colloid Composite as an Efficient Bifunctional Catalyst for Oxygen Electrocatalytic Reactions

Zhou

Cai

Lei

et al. 2017

Advanced Energy Materials

305

158

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Ternary NiCoFe‐layered double hydroxide (NiCoIIIFe‐LDH) with Co3+ is grafted on nitrogen‐doped graphene oxide (N‐GO) by an in situ growth route. The array‐like colloid composite of NiCoIIIFe‐LDH/N‐GO is used as a bifunctional catalyst for both oxygen evolution/reduction reactions (OER/ORR). The NiCoIIIFe‐LDH/N‐GO array has a 3D open structure with less stacking of LDHs and an enlarged specific surface area. The hierarchical structure design and novel material chemistry endow high activity propelling O2 redox. By exposing more amounts of Ni and Fe active sites, the NiCoIIIFe‐LDH/N‐GO illustrates a relatively low onset potential (1.41 V vs reversible hydrogen electrode) in 0.1 mol L−1 KOH solution under the OER process. Furthermore, by introducing high valence Co3+, the onset potential of this material in ORR is 0.88 V. The overvoltage difference is 0.769 V between OER and ORR. The key factors for the excellent bifunctional catalytic performance are believed to be the Co with a high valence, the N‐doping of graphene materials, and the highly exposed Ni and Fe active sites in the array‐like colloid composite. This work further demonstrates the possibility to exploit the application potential of LDHs as OER and ORR bifunctional electrochemical catalysts.

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Section: Resultsmentioning

confidence: 99%

NiCoFe‐Layered Double Hydroxides/N‐Doped Graphene Oxide Array Colloid Composite as an Efficient Bifunctional Catalyst for Oxygen Electrocatalytic Reactions

Zhou

Cai

Lei

et al. 2017

Advanced Energy Materials

305

158

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“…In particular, in the "co-precipitation at constant pH", an aqueous solution of Ni(II) and Fe(III) metal salts is added to a second water solution that is kept under stirring and at a certain mild basic pH (for example 9 or 11) by addition of a base or carbonate (i.e., KOH, Na 2 CO 3 ,..). [55,62] The mechanism of formation was studied by Gregoire et al by titrate an aqueous solution of the two metal precursors. [55] Increasing the temperature (i.e., to 80-120 °C) by a subsequent hydrothermal treatment favors crystallization of the materials.…”

Section: Co-precipitation At Constant Phmentioning

confidence: 99%

NiFe‐Based (Oxy)hydroxide Catalysts for Oxygen Evolution Reaction in Non‐Acidic Electrolytes

Dionigi

Strasser

2016

Advanced Energy Materials

821

731

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NiFe‐based (oxy)hydroxides are highly active catalysts for the oxygen evolution reaction in alkaline electrolyte solutions. These catalysts can be synthesized in different ways leading to nanomaterials and thin films with distinct morphologies, stoichiometries and long‐range order. Notably, their structure evolves under oxygen evolution operating conditions with respect to the as‐synthesized state. Therefore, many researchers have dedicated their efforts on the identification of the catalytic active sites employing in operando experimental methods and theoretical calculations. These investigations are pivotal to rationally design materials with outstanding performances that will constitute the anodes of practical commercial alkaline electrolyzers. The family of NiFe‐based oxyhydroxide catalysts reported in recent years is addressed and the actual state of the research with special focus on the understanding of the oxygen‐evolution‐reaction active sites and phase is described. Finally, an overview on the proposed oxygen‐evolution‐reaction mechanisms occurring on NiFe‐based oxyhydroxide electrocatalysts is provided.

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“…The LDHs advantages include nontoxic materials, good sorbents for various harmful anions and room temperature preparation process 20. Another advantage of LDHs is that their particle size and aspect ratio can be controlled by changing the reaction conditions,21 which made them useful for many applications in catalysis,22 photochemistry,23 dye sorption,24 and electrochemistry 25…”

Section: Introductionmentioning

confidence: 99%

Flexibility improvement of poly(lactic acid) by stearate‐modified layered double hydroxide

Eili

Yunus

Hussein

et al. 2010

J of Applied Polymer Sci

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Poly(lactic acid)/layered double hydroxide (PLA/LDH) nanocomposites were prepared from PLA and stearate-Mg 3 Al LDH via a solution casting method. The anionic clay Mg 3 Al LDH was prepared first by coprecipitation method from nitrate salts solution at pH 9 and then modified by stearate anions through an ion exchange reaction. This modification increased the basal spacing of the synthetic clay from 8.72 to 31.68 Å . The presence of stearate ions in the synthesized Mg 3 Al LDH was shown by the stearate-Mg 3 Al LDH infrared spectrum. When the stearate-Mg 3 Al LDH at the low concentration was dispersed in the PLA matrix, its layers were largely delaminated. The presence of 1.0 wt % of the stearate-Mg 3 Al LDH in the PLA improved drastically (of around 650%) of its elongation at break but retained its tensile strength and modulus as compared to those of the pure PLA.

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Nickel–iron layered double hydroxide (LDH): Textural properties upon hydrothermal treatments and application on dye sorption

Cited by 153 publications

References 47 publications

NiCoFe‐Layered Double Hydroxides/N‐Doped Graphene Oxide Array Colloid Composite as an Efficient Bifunctional Catalyst for Oxygen Electrocatalytic Reactions

NiCoFe‐Layered Double Hydroxides/N‐Doped Graphene Oxide Array Colloid Composite as an Efficient Bifunctional Catalyst for Oxygen Electrocatalytic Reactions

NiFe‐Based (Oxy)hydroxide Catalysts for Oxygen Evolution Reaction in Non‐Acidic Electrolytes

Flexibility improvement of poly(lactic acid) by stearate‐modified layered double hydroxide

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