Title Efficient, Low Cost Synthesis of Sodium Platinum Bronze NaxPt3O4
Authors Horwat, David , Dehmas, Moukrane , Gutierrez, Alejandro , Pierson, Jean-Francois , Anders, Andre , Soldera, Flavio , ENDRINO ARMENTEROS, JOSÉ LUIS
External publication Si
Means Chem. Mater.
Scope Article
Nature Científica
JCR Quartile 1
SJR Quartile 1
JCR Impact 8.23800
SJR Impact 4.18100
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-84863697334&doi=10.1021%2fcm301179x&partnerID=40&md5=f80a26676a3138b7d774192608117d75
Publication date 10/07/2012
ISI 000306200700003
Scopus Id 2-s2.0-84863697334
DOI 10.1021/cm301179x
Abstract An efficient, low cost synthesis of sodium platinum bronze Na xPt 3O 4 was investigated. PtO y films were deposited on silicon and SLG slides. Chemical and structural evolutions of the films upon annealing in air were probed by X-ray absorption near edge structure (XANES), X-ray diffraction (XRD), and high resolution transmission electron microscopy (HRTEM). An average oxidation state of 3.2 is derived from the XANES signal of the as-deposited films, corresponding to stoichiometry PtO 1.6. This reflects the fact that sputter-deposited PtO y films are mixtures of PtO and PtO 2 phases at the nanometer scale. When using a silicon substrate, further oxidation of the film is observed up to an average oxidation state of 3.6 upon annealing at 300°C, corresponding to a mixture of 80 mol % PtO 2 and 20 mol % PtO. XRD analyses indicated that the film remained nanocrystalline during the process.
Keywords thin films; platinum; oxide; soft synthesis; sodium
Universidad Loyola members

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