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• W29541979 endingPage "5272" @default.
• W29541979 startingPage "5262" @default.
• W29541979 abstract "Nanocrystalline Ce1-xTixO2 (0 ≤ x ≤ 0.4) and Ce1-x-yTixPtyO2-δ (x = 0.15, y = 0.01, 0.02) solid solutions crystallizing in fluorite structure have been prepared by a single step solution combustion method. Temperature programmed reduction and XPS study of Ce1-xTixO2 (x = 0.0−04) show complete reduction of Ti4+ to Ti3+ and reduction of ∼20% Ce4+ to Ce3+ state compared to 8% Ce4+ to Ce3+ in the case of pure CeO2 below 675 °C. The substitution of Ti ions in CeO2 enhances the reducibility of CeO2. Ce0.84Ti0.15Pt0.01O2-δ crystallizes in fluorite structure and Pt is ionically substituted with 2+ and 4+ oxidation states. The H/Pt atomic ratio at 30 °C over Ce0.84Ti0.15Pt0.01O2-δ is 5 and that over Ce0.99Pt0.01O2-δ is 4 against just 0.078 for 8 nm Pt metal particles. Carbon monoxide and hydrocarbon oxidation activity are much higher over Ce1-x-yTixPtyO2 (x = 0.15, y = 0.01, 0.02) compared to Ce1-xPtxO2 (x = 0.01, 0.02). Synergistic involvement of Pt2+/Pt° and Ti4+/Ti3+ redox couples in addition to Ce4+/Ce3+ due to the overlap of Pt(5d), Ti(3d), and Ce(4f) bands near EF is shown to be responsible for improved redox property and higher catalytic activity." @default.
• W29541979 created "2016-06-24" @default.
• W29541979 creator A5033193828 @default.
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• W29541979 date "2006-02-24" @default.
• W29541979 modified "2023-10-14" @default.
• W29541979 title "Enhanced Reducibility of Ce₁_-<i>_x</i>Ti<i>_x</i>O₂ Compared to That of CeO₂ and Higher Redox Catalytic Activity of Ce₁_-<i>_x</i>_-<i>_y</i>Ti<i>_x</i>Pt<i>_y</i>O₂_-_δ Compared to That of Ce₁_-<i>_x</i>Pt<i>_x</i>O₂_-_δ" @default.
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• W29541979 doi "https://doi.org/10.1021/jp0565103" @default.
• W29541979 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16539456" @default.
• W29541979 hasPublicationYear "2006" @default.
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