platinum oxide

platinum oxide

[′plat·ən·əm ′äk‚sīd]
(inorganic chemistry)
An oxide of platinum; examples are platinum monoxide (or platinous oxide), PtO, and platinum dioxide (or platinic oxide), PtO2.
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Tenders are invited for Supply of platinum oxide, etc
The signals at 72.5 eV ([4f.sub.7/2]) and 75.4 eV ([4f.sub.5/2]) correspond to a 37% of the total platinum and can be ascribed to platinum oxide. These results indicate that the reduction of Pt (IV) to Pt[degrees] indeed took place and that Pt nanoparticles were supported onto the bovine-bone powder in controlled size and shape.
The electrode behavior changed if the electrode was preoxidized producing a platinum oxide coating.
On exposure to oxygen the platinum surface is oxidised, resulting in the formation of an inactive surface platinum oxide. This is also referred to as over oxidation and sub-surface oxygen formation.
Some specific subjects discussed include formation of metal-semiconductor core-shell nanoparticles using electrochemical atomic layer deposition, and remote plasma and thermal ALD of platinum and platinum oxide films.
Platinum oxide, Karstedl's catalyst (platinum (0)-L3-divinyl-l,l,33-tet-ramethyl disilo'xane complex), 1-iodooctane, CD[Cl.sub.3] dimethyl sulfoxide.
Once dissolved, approximately 2.00 g ol' platinum oxide was added to Ihe reaction mixture and the reaction mixture vigorously stirred for 16 h at 60[degrees]C.
Furthermore, "the platinum oxide layer that quickly forms on an electrode's surface dramatically slows down the chemical reactions there," says Adzic.
The method is based on a hydrogen gas-saturated mobile phase with fluorescent detection after postcolumn reduction by a platinum oxide catalyst column (3).
They found that the inner surface of the bubbles was lined with a layer of platinum oxide which could be up to 85 nanometres thick, much thicker than expected.
The Pt-TNTs were found to generate platinum oxide Pt[O.sub.x.sup.[delta]+] (PtO and Pt[O.sub.2], with [[delta].sup.+] in both +2 and +4 states while x = 1 and 2, resp.) [38, 39] after calcination at 550[degrees]C.
Despite having a significant amount of oxygen in the composition of the electrocatalysts, crystalline formation of the platinum or gallium oxides was not identified; however this hypothesis cannot be dismissed because the oxides might be present in amorphous form, since the gallium oxide has well defined structure upon heating above 500[degrees]C [32] and platinum oxides are well formed at 900[degrees]C [33].