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- W3201616238 endingPage "12122" @default.
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- W3201616238 abstract "With the combination of experimental methods and DFT calculations, the influence of lattice disorder degree on the catalytic property of Bi2B2O7 compounds with different B-site cations (B = Sn, Ti, Zr) has been elucidated in this work. The crystal structures of the samples vary from a well-ordered pyrochlore (Bi2Sn2O7) to a less-ordered pyrochlore (Bi2Ti2O7), and eventually to a disordered defect fluorite (Bi2Zr2O7) phase, hence the lattice disorder degree increases. DFT calculation and oxygen ion conductivity results have testified that the surface oxygen vacancy formation energies (EO-f) of the catalysts decrease with the increase of the disorder degree, accompanying the improvement of the lattice ion mobility and the formation of more surface oxygen vacancies. Isotopic 18O2 tracing experiments have demonstrated that the adsorbing and activating of gas phase O2 molecules mainly follow an R2 mechanism requiring two adjacent surface vacancies. With the synergistic actions of surface oxygen vacancies and lattice O2– anions, both active O2– and O22– sites contributing vitally to soot combustion can be formed. Therefore, the abundance of surface oxygen vacancies is of great importance for this process, which is intimately related to the lattice disorder degree of the compounds. From this point of view, it is concluded that the lattice disorder degree is the inherent factor to determine the redox property and reaction performance of Bi2B2O7 compounds for soot combustion." @default.
- W3201616238 created "2021-09-27" @default.
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- W3201616238 date "2021-09-15" @default.
- W3201616238 modified "2023-10-16" @default.
- W3201616238 title "Unraveling the Principles of Lattice Disorder Degree of Bi<sub>2</sub>B<sub>2</sub>O<sub>7</sub> (B = Sn, Ti, Zr) Compounds on Activating Gas Phase O<sub>2</sub> for Soot Combustion" @default.
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- W3201616238 doi "https://doi.org/10.1021/acscatal.1c03075" @default.
- W3201616238 hasPublicationYear "2021" @default.
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