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Atomistic study of promising catalyst and electrode material for memory capacitors: Platinum oxides
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Tillämpad materialfysik.
Vise andre og tillknytning
2013 (engelsk)Inngår i: Computational materials science, ISSN 0927-0256, E-ISSN 1879-0801, Vol. 79, s. 804-810Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Platinum oxides have the technological importance as evidenced by numerous studies concentrating on their crystal structures to attain the clear atomistic understanding but the controversy exists between the experimental and theoretical studies. In our present study, we report the electronic and optical properties of crystalline PtO and PtO2 on the basis of Heyd-Scuseria-Ernzerhof (HSE06) functional within the framework of the density functional theory (DFT). We present the structural parameters, electronic and optical properties of several proposed structures of PtO and PtO2. We find that PtS-type structure of PtO and CaCl2-type structure of PtO2 are the most stable structures of these materials on the basis of hybrid functional and they appear to be semiconductors with band gap values of 0.87 eV and 1.85 eV, respectively. The mechanical stability of these structures is also confirmed by calculating the phonon band structures. The corresponding structural parameters are found in good agreement with experimental values. Furthermore, we present the bader charge analysis and optical properties of these phases.

sted, utgiver, år, opplag, sider
2013. Vol. 79, s. 804-810
Emneord [en]
Electronic structure, Optical properties, Hybrid functional, Phonon calculations
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-132198DOI: 10.1016/j.commatsci.2013.07.021ISI: 000324471100102Scopus ID: 2-s2.0-84883375959OAI: oai:DiVA.org:kth-132198DiVA, id: diva2:659326
Forskningsfinansiär
Swedish Energy Agency
Merknad

QC 20131025

Tilgjengelig fra: 2013-10-25 Laget: 2013-10-24 Sist oppdatert: 2017-12-06bibliografisk kontrollert

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