Thermal decomposition of ammonium hexachloroosmate

Asanova, Tatyana; Kantor, Innokenty; Asanov, I. P.; Коренев, С. В.; Yusenko, K. V.

doi:10.1039/c6cp07133c

Cited by 9 publications

(1 citation statement)

References 33 publications

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“…Typically a support material is needed to stabilize the nanoparticles 2 . An overview of different syntheses is proposed and an example of synthesis is the thermal decomposition of Os precursors 45 . Pyrolysis leads to different nanoparticle size depending on the ligand structures of the precursors 27 and needs to be performed at relatively high temperature, e.g.…”

Section: Discussion/analysis Of the Recent Literaturementioning

confidence: 99%

Osmium and OsOx nanoparticles: an overview of syntheses and applications

Quinson¹

2022

Open Res Europe

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Precious metal nanoparticles are key for a range of applications ranging from catalysis and sensing to medicine. While gold (Au), silver (Ag), platinum (Pt), palladium (Pd) or ruthenium (Ru) nanoparticles have been widely studied, other precious metals are less investigated. Osmium (Os) is one of the least studied of the precious metals. However, Os nanoparticles are interesting materials since they present unique features compared to other precious metals and Os nanomaterials have been reported to be useful for a range of applications, catalysis or sensing for instance. With the increasing availability of advanced characterization techniques, investigating the properties of relatively small Os nanoparticles and clusters has become easier and it can be expected that our knowledge on Os nanomaterials will increase in the coming years. This review aims to give an overview on Os and Os oxide materials syntheses and applications.

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Section: Discussion/analysis Of the Recent Literaturementioning

confidence: 99%

Osmium and OsOx nanoparticles: an overview of syntheses and applications

Quinson¹

2022

Open Res Europe

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High-pressure high-temperature stability of hcp-Ir Os1− (x = 0.50 and 0.55) alloys

Yusenko

Bykova

Bykov

et al. 2017

Journal of Alloys and Compounds

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Hcp-Ir 0.55 Os 0.45 and hcp-Ir 0.50 Os 0.50 alloys were synthesised by thermal decomposition of single-source precursors in hydrogen atmosphere. Both alloys correspond to a miscibility gap in the Ir─Os binary phase diagram and therefore are metastable at ambient conditions. An in situ powder X-ray diffraction has been used for a monitoring a formation of hcp-Ir 0.55 Os 0.45 alloy from (NH 4) 2 [Ir 0.55 Os 0.45 Cl 6 ] precursor. A crystalline intermediate compound and nanodimentional metallic particles with a large concentration of defects has been found as key intermediates in the thermal decomposition process in hydrogen flow. High-temperature stability of titled hcp-structured alloys has been investigated upon compression up to 11 GPa using a multi-anvil press and up to 80 GPa using laser-heated diamond-anvil cells to obtain a phase separation into fcc+hcp mixture. Compressibility curves at room temperature as well as thermal expansion at ambient pressure and under compression up to 80 GPa were collected to obtain thermal expansion coefficients and bulk moduli. hcp-Ir 0.55 Os 0.45 alloy shows bulk moduli B 0 =395 GPa. Thermal expansion coefficients were estimated as α = 1.6•10-5 K-1 at ambient pressure and α = 0.3•10-5 K-1 at 80 GPa. Obtained high-pressure high-temperature data allowed us to construct the first model for pressure-dependent Ir─Os phase diagram.

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