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- W156924762 abstract "The decomposition of Ba(NO3)2 formed on BaO/Pt(111) (Pt(111) surface is partially covered by BaO) in the presence of CO was studied using temperature-programmed desorption, infrared reflection absorption, and X-ray photoelectron spectroscopies. The exposure of BaO/Pt(111) to elevated NO2 pressure (1.0 × 10−4 torr) at 450 K leads to the formation of Ba(NO3)2, chemisorbed O (OPt), and Pt-oxide-like domains. During TPD, the Ba(NO3)2 begins to thermally decompose near 490 K, releasing NO and NO2 with the maximum NOx desorption rate seen at 605 K. The OPt species formed following the exposure of BaO/Pt(111) to NO2 react with CO to release CO2 at 450 K. The consumption of OPt during CO oxidation initiates the migration of O from the Pt-oxide-like domains to the chemisorbed phase, where the CO oxidation reaction occurs. Therefore, the removal of OPt by CO leads to the reduction of oxidized Pt and to the formation of metallic Pt(111) domains, where, subsequently, catalytic decomposition of Ba(NO3)2 can take place. The Pt-catalyzed decomposition of Ba(NO3)2 occurs readily at 450 K, a temperature much lower than the onset of the decomposition temperature of Ba(NO3)2 in the presence of oxidized Pt." @default.
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- W156924762 date "2011-03-08" @default.
- W156924762 modified "2023-09-27" @default.
- W156924762 title "Catalytic Decomposition of Ba(NO<sub>3</sub>)<sub>2</sub> on Pt(111)" @default.
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- W156924762 doi "https://doi.org/10.1021/jp111924z" @default.
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