The peculiarities of Au-Pt alloy nanoparticles formation during the decomposition of double complex salts

The platinum-gold alloyed nanoparticles were prepared via decomposition of double complex salts containing both inorganic and organic ligands. Decomposition of the precursor was performed in a reductive atmosphere with varied temperature ramping rates. The samples were characterized by means of X-ray diffraction (XRD) analysis, transmission electron microscopy, and UV-vis spectroscopy. According to XRD data, both the ramping rate and the final temperature of decomposition strongly affect the Pt-Au ratio in alloyed nanoparticles which are being formed. The average crystallite size was found to be 15-20 nm, that was also confirmed by UV-vis spectroscopy for the alloyed Pt-Au nanoparticles supported on alumina. (C) 2018 Elsevier B.V. All rights reserved.