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

• Published in: Journal of alloys and compounds Vol. 740; pp. 935 - 940
• Main Authors: Shubin, Yury V., Vedyagin, Aleksey A., Plyusnin, Pavel E., Kirilovich, Anastasiya K., Kenzhin, Roman M., Stoyanovskii, Vladimir O., Korenev, Sergey V.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 05.04.2018; Elsevier BV
• Subjects: Alloy plating; Aluminum oxide; Characterization; Decomposition; Electron microscopy; Gold; Gold base alloys; Nanoalloys; Nanoparticles; Partly miscible metals; Platinum; Studies; Synthesis; Temperature; Transmission electron microscopy; Ultraviolet spectroscopy; X-ray diffraction; Characterization; Partly miscible metals; Gold; Nanoalloys; Synthesis; Platinum
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2017.12.127

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. [Display omitted] •The alloyed nanoparticles of partly miscible platinum and gold were prepared.•Thermolysis of single-source precursor was performed in a reductive atmosphere.•The use of organic ligand stabilizes the metastable alloy by formation of carbon.•The average crystallite size was found to be within 15–20 nm.