The effect of polyol on multiple ligand capped silver alloyed nanobimetallic particles in tri- n -octylphosphine oxide and oleic acid matrices

Abstract

The syntheses of Ag/M (M is Co, Ni, Pd, Pt and Ru) alloyed nanobimetallic particles in tri-n-octylphosphine oxide and oleic acid matrices were successfully carried out by the successive reduction of ligand capped metal ions with polyols, which resulted in rapid precipitation of some fractal high index faceted hybrid Ag/M bimetal nanoparticles. The optical measurements revealed the existence of modified surface plasmon band and peak broadening resulting from reaction-limited growth processes of the metal sols, making it possible to monitor the changes spectrometrically. The bimetallic nanoparticles were further characterized by powder x-ray diffraction, x-ray photoelectron spectroscopy and electron microscopy techniques which confirmed the formation of novel core–shell and alloyed clusters. The Ag/M nanoparticles thus synthesized within TOPO/OA matrices indicated significant reduction potential as a result of their energy band gap 2.65–2.77 eV which points to the fact that they could serve as reducing agents for electrocatalytic reaction.

Bimetallic Gold-Palladium Nanoparticles: Applications in Methanol and Ethanol Oxidation Reactions

“…It is generally accepted that crystal structure matching will only take place for two metals whose crystal structures are different in size by less than 5%. 54,65 Metals with small amounts of lattice mismatch can undergo epitaxial growth, where the shell metal will match the crystal lattice and shape of the core metal up to a specific size. 63 Although it is harder to grow highly-mismatched core-shell bimetallic nanoparticles, significant advances have been made toward their synthesis.…”

Green synthesis of triclinic (anorthic) phase AgCoPO4 nanoparticles: optical studies and theoretical modelling

“…From literature, the crystal structure of AgCoPO 4 had been solved using Patterson and direct method [ 28 ]. So far, preparation of Ag–Co nanoparticles via physical and chemical method was reported [ 29 , 30 , 31 ]; however, few findings were carried out using the plant-influenced green approach. Studies showed that the existence of rare metal is known to enhance the stability of cobalt against oxidation [ 32 ].…”