Platinum and platinum oxide nanoparticles generated by unipolar spark discharge

0519782 - ÚT 2021 RIV GB eng J - Journal Article
Němec, Tomáš - Šonský, Jiří - Gruber, Jan - de Prado, Esther - Kupčík, Jaroslav - Klementová, Mariana
Platinum and platinum oxide nanoparticles generated by unipolar spark discharge.
Journal of Aerosol Science. Roč. 141, March (2020), č. článku 105502. ISSN 0021-8502. E-ISSN 1879-1964
R&D Projects: GA MŠMT LM2015087; GA MŠMT(CZ) EF15_003/0000493
Grant - others:AV ČR(CZ) StrategieAV21/3
Program: StrategieAV
Institutional support: RVO:61388998 ; RVO:68378271
Keywords : platinum nanoparticles * platinum oxide nanoparticles * aerosol synthesis
OECD category: Nano-materials (production and properties); Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D)
Impact factor: 3.433, year: 2020
Method of publishing: Limited access
https://reader.elsevier.com/reader/sd/pii/S0021850219306068?token=E974A6719C2A1382BE48F8BE695E8AA683CA4CAA3D3A4DDE45D9AF3CD913917937EC625B4F7F313A38706BCBCBD902EC&originRegion=eu-west-1&originCreation=20230301114637

Platinum nanoparticles were generated by spark discharge in forming gas (95 vol% nitrogen and 5 vol% hydrogen) and in air. An in-house developed spark discharge generator was used featuring unipolar spark discharge characteristics. Platinum nanoparticles generated in forming gas are pure platinum, crystalline, and 2-10 nm in diameter. However, spark discharge in air produces complex, 10-50 nm, amorphous, non-stoichiometric platinum oxide particles containing nano-crystals of pure platinum about 5 nm insize on the surface. Independently of the carrier gas, the produced material also contains spherical fine particles of hundreds of nanometers in diameter, which are composed of platinum only. The amount of the spherical fine particles was quantified by X-ray diffraction, resulting in about 10% and 14% wight fraction, when generated in forming gas and in air, respectively.
Permanent Link: http://hdl.handle.net/11104/0306825