Ru-doped ceria–zirconia mixed oxides catalyze soot combustion

Nascimento, Leandro Fontanetti do; Martins, Renata Figueredo; Silva, R. F.; Filho, Paulo C. de Sousa; Serra, Osvaldo Antônio

doi:10.1007/s11144-013-0636-4

Cited by 27 publications

(18 citation statements)

References 63 publications

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“…25,26 In many cases, doping CeO 2 with alterable valencestate metal ions to generate lattice defects has proven to be an effective method to enhance the redox capacity and oxide-ion mobility. 3,7,9,[27][28][29] Moreover, the activity, as well as the thermal stability, of CeO 2 could be improved.…”

Section: -6mentioning

confidence: 99%

Design structure for CePr mixed oxide catalysts in soot combustion

Fan

Zhu

et al. 2017

RSC Adv.

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Four CePr mixed oxides with different structures were designed and synthesized using a solid-phase grinding method: a uniform solid solution of Ce and Pr (CePr-NN), Pr 6 O 11 -coated CeO 2 (CePr-NO), CeO 2 -coated Pr 6 O 11 (CePr-ON), and particle packing of CeO 2 and Pr 6 O 11 (CePr-OO) were obtained, and characterized by XRD, H 2 -TPR, TEM and TG. The results show that CePr-NN exhibits the best low temperature catalytic activity among the CePr catalysts. CeO 2 is the major active phase on the surface of the CePr catalysts, and the use of Pr 6 O 11 as the framework maintains the thermal stability of the CePr composite oxide. Moreover, both the oxygen storage capacity and mobility of the active oxygen of the catalyst were improved with the incorporation of Pr into CeO 2 , resulting in a higher combustion rate. The "molten state" which appeared during the preparation when nitrate was used as the precursor, plays a significant role in the migration of Ce and Pr, and is the premise of forming different structures of solid solution or coating structure.

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Section: -6mentioning

confidence: 99%

Design structure for CePr mixed oxide catalysts in soot combustion

Fan

Zhu

et al. 2017

RSC Adv.

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“…The successful application of ceria in soot oxidation reactions stems from its redox behavior, which involves facile exchange between Ce 3+ and Ce 4+ and the high mobility of O 2– ions in the lattice. This redox process ensures the formation of oxygen vacancies that facilitate activation and transport of oxygen species, which results in remarkable oxygen storage capacity (OSC) 5. The generated labile oxygen vacancies and bulk oxygen species are very active for soot oxidation process.…”

Section: Introductionmentioning

confidence: 99%

Protein Flexibility in Drug Discovery: From Theory to Computation

2015

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Nowadays it is widely accepted that the mechanisms of biomolecular recognition are strongly coupled to the intrinsic dynamic of proteins. In past years, this evidence has prompted the development of theoretical models of recognition able to describe ligand binding assisted by protein conformational changes. On a different perspective, the need to take into account protein flexibility in structure-based drug discovery has stimulated the development of several and extremely diversified computational methods. Herein, on the basis of a parallel between the major recognition models and the simulation strategies used to account for protein flexibility in ligand binding, we sort out and describe the most innovative and promising implementations for structure-based drug discovery.

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“…Ceria (CeO 2 ) is an essential component for low temperature oxidation. CeO 2 support is able to provide high dispersion of Pd [12][13][14], and, moreover, to promote the oxidation activity due to its characteristic oxygen storage capacity (OSC) [15,16]. By alternating its oxidative state between Ce 3+ and Ce 4+ , CeO 2 can store or release oxygen depending on the gas environment, resulting in the enhanced low temperature oxidation [17].…”

Section: Introductionmentioning

confidence: 99%