Effect of Dopant Loading on the Structural and Catalytic Properties of Mn-Doped SrTiO3 Catalysts for Catalytic Soot Combustion

Suárez Vázquez, Santiago y Cruz López, Arquímedes y Molina Guerrero, Carlos y Sánchez Vázquez, Astrid Iriana y Macías Sotelo, Carlos (2018) Effect of Dopant Loading on the Structural and Catalytic Properties of Mn-Doped SrTiO3 Catalysts for Catalytic Soot Combustion. Catalysts, 8 (2). pp. 1-11. ISSN 2073-4344

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URL o página oficial: http://doi.org/10.3390/catal8020071

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Abstract: Soot particles have been associated with respiratory diseases and cancer. To decrease these emissions, perovskite-mixed oxides have been proposed due to their thermal stability and redox surfaceproperties. Inthiswork,SrTiO3 dopedwithdifferentamountsofMnweresynthesizedbythe hydrothermalmethodandtestedforsootcombustion. ResultsshowthatatlowMncontent,structural distortion,andhigherOads/Olat ratiowereobservedwhichwasattributedtothehighcontentofMn3+ inTisites. Ontheotherhand,increasingtheMncontentledtosurfacesegregationofmanganeseoxide. All synthesized catalysts showed mesopores in the range of 32–47 nm. In the catalytic combustion of soot, the samples synthesized in this work lowered the combustion temperature by more than 100◦C compared with the uncatalyzed reaction. The sample doped with 1 wt % of Mn showed the best catalytic activity. The activation energy of these samples was also calculated, and the order of decreasingactivationenergyisasfollows: uncatalyzed>Mn0>Mn8>Mn4>Mn1. Thebestcatalytic activityforMn1wasattributedtoitsphysicochemicalpropertiesandthemobilityoftheoxygenfrom the bulk to the surface at temperatures higher than 500◦C. Keywords: activation energy; hydrothermal synthesis; catalytic combustion; soot; perovskite

Tipo de elemento: Article
Divisiones: Ingeniería Civil
Usuario depositante: Lic. Josimar Pulido
Creadores:
CreadorEmailORCID
Suárez Vázquez, SantiagoNO ESPECIFICADONO ESPECIFICADO
Cruz López, ArquímedesNO ESPECIFICADONO ESPECIFICADO
Molina Guerrero, CarlosNO ESPECIFICADONO ESPECIFICADO
Sánchez Vázquez, Astrid IrianaNO ESPECIFICADONO ESPECIFICADO
Macías Sotelo, CarlosNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 26 Jul 2019 20:16
Última modificación: 10 Jun 2020 17:03
URI: http://eprints.uanl.mx/id/eprint/16329

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