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Solid-State Dispersions of Platinum in the SnO2 and Fe2O3 Nanomaterials (CROSBI ID 306240)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Radin, Edi ; Štefanić, Goran ; Dražić, Goran ; Marić, Ivan ; Jurkin, Tanja ; Pustak, Anđela ; Baran, Nikola ; Raić, Matea ; Gotić, Marijan Solid-State Dispersions of Platinum in the SnO2 and Fe2O3 Nanomaterials // Nanomaterials, 11 (2021), 12; 3349, 16. doi: 10.3390/nano11123349

Podaci o odgovornosti

Radin, Edi ; Štefanić, Goran ; Dražić, Goran ; Marić, Ivan ; Jurkin, Tanja ; Pustak, Anđela ; Baran, Nikola ; Raić, Matea ; Gotić, Marijan

engleski

Solid-State Dispersions of Platinum in the SnO2 and Fe2O3 Nanomaterials

The dispersion of platinum (Pt) on metal oxide supports is important for catalytic and gas sensing applications. In this work, we used mechanochemical dispersion and compatible Fe(II) acetate, Sn(II) acetate and Pt(II) acetylacetonate powders to better disperse Pt in Fe2O3 and SnO2. The dispersion of platinum in SnO2 is significantly different from the dispersion of Pt over Fe2O3. Electron microscopy has shown that the elements Sn, O and Pt are homogeneously dispersed in α-SnO2 (cassiterite), indicating the formation of a (Pt, Sn)O2 solid solution. In contrast, platinum is dispersed in α-Fe2O3 (hematite) mainly in the form of isolated Pt nanoparticles despite the oxidative conditions during annealing. The size of the dispersed Pt nanoparticles over α- Fe2O3 can be controlled by changing the experimental conditions and is set to 2.2, 1.2 and 0.8 nm. The rather different Pt dispersion in α- SnO2 and α-Fe2O3 is due to the fact that Pt4+ can be stabilized in the α-SnO2 structure by replacing Sn4+ with Pt4+ in the crystal lattice, while the substitution of Fe3+ with Pt4+ is unfavorable and Pt4+ is mainly expelled from the lattice at the surface of α-Fe2O3 to form isolated platinum nanoparticles.

platinum ; hematite ; cassiterite ; ball-milling ; mechanochemical ; Fe2O3 ; SnO2 ; dispersion ; XPS ; STEM

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Podaci o izdanju

11 (12)

2021.

3349

16

objavljeno

2079-4991

10.3390/nano11123349

Povezanost rada

Fizika, Interdisciplinarne prirodne znanosti, Kemija

Poveznice
Indeksiranost