Mg/Al layered double hydroxide-Pt nanoparticle composite by delamination-restacking route

Abstract

Platinum nanoparticle intercalated magnesiumaluminum layered double hydroxide (LDH) composite was prepared by restacking the colloidal dispersion of organically modified LDH in the presence of preformed oleylamine capped platinum nanoparticles in n-butanol. The resultant nanocomposite was characterized using powder X-ray diffraction (PXRD), infrared (IR) spectroscopy, transmission electron microscopy (TEM), selected area electron diffraction and energy dispersive X-ray spectroscopy (EDX). The PXRD pattern of the composite indicates an expanded interlayer due to the intercalation of the Ptnanoparticles into the LDH interlayer region. PXRD patterns along with the IR spectra confirm the formation of the precursors and the composite. TEM image of Pt-nanoparticles shows spherical particles with an average particle size of *3 nm and that of the composite shows dispersed Pt-nanoparticles on the LDH matrix. The presence of Pt, Mg and Al in the composite is indicated in the EDX data.

Fabrication and Characterization of Cu Nanoparticles Dispersed on ZnAl-Layered Double Hydroxide Nanocatalysts for the Oxidation of Cyclohexane

“…Figure b,d depicts the average particle size distribution of LDH–[OH–C 6 H 4 COO] and CuNPs@LDH, with particle size ranging from 20 to 50 nm . The HRTEM study of CuNPs@LDH revealed that Cu nanoparticles are uniformly dispersed over the LDH platelets (Figure c,e) . Furthermore, HRTEM images shown in Figure e revealed an interplanar spacing of 0.25 nm, which is consistent with the interplanar distance of the Cu (111) crystallographic plane, which is consistent with the powder XRD results (Figure b). , Additionally, no diffraction patterns of Cu + species were found, which was consistent with the XRD results.…”

Electrosynthesized Ni-Al Layered Double Hydroxide-Pt Nanoparticles as an Inorganic Nanocomposite and Potentate Anodic Material for Methanol Electrooxidation in Alkaline Media

“…Ni-Al LDH not only possess all the advantages of common LDH but also have the electrochemical activity because of the presence of a reversible one-electron redox couple, Ni(III)/Ni(II), which allows their application in electrochemistry area [29][30][31]. Electrochemical applications of LDH to electrochemical sensors, electrocatalysts, dye-sensitized solar cells and super capacitors were presented [32][33][34][35][36][37]. In the fuel cell applications, recently Ni-Al LDH has been reported to catalyze the electrooxidation of primary alcohols and sugars [38][39][40][41].…”

“…Different approaches were used to synthesis of LDH and different methods have been proposed to modify electrode surfaces with LDH films; the most common one consists of depositing a fixed amount of a colloidal solution of the LDH, previously synthesized in bulk size [36,37], onto the electrodes [38][39][40][41]. A drawback of this method is the poor adhesion of the LDH films to the electrode surfaces.…”

Synthesis and characterization of protocatechuic acid-loaded gadolinium-layered double hydroxide and gold nanocomposite for theranostic application

“…x OH 2 ] ( A n−1 ) x∕n , which comprise of divalent and trivalent metal cations, and interlayer exchangeable anions, represented by M 2+ and M 3+ , and ( A n−1 )x∕n , respectively (Nityashree and Menezes 2013). Water molecules are also found within the interlayers.…”