Artículo
Elucidation of water promoter effect of proton conductor in wgs reaction over pt-based catalyst: An operando drifts study
Autor/es | Jurado, Lole
García Moncada, Nuria Bobadilla Baladrón, Luis Francisco Romero Sarria, Francisca Odriozola Gordón, José Antonio |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2020 |
Fecha de depósito | 2020-09-14 |
Publicado en |
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Resumen | A conventional Pt/CeO2/Al2O3 catalyst physically mixed with an ionic conductor (Mo-or Eu-doped ZrO2) was tested at high space velocity (20,000 h−1 and 80 L h−1 gcat−1) under model conditions (only with CO and H2O) and ... A conventional Pt/CeO2/Al2O3 catalyst physically mixed with an ionic conductor (Mo-or Eu-doped ZrO2) was tested at high space velocity (20,000 h−1 and 80 L h−1 gcat−1) under model conditions (only with CO and H2O) and industrial conditions, with a realistic feed. The promoted system with the ionic conductor physically mixed showed better catalytic activity associated with better water dissociation and mobility, considered as a rate-determining step. The water activation was assessed by operando diffuse reflectance infrared fourier transformed spectroscopy (DRIFTS) studies under reaction conditions and the Mo-containing ionic conductor exhibited the presence of both dissociated (3724 cm−1) and physisorbed (5239 cm−1) water on the Eu-doped ZrO2 solid solution, which supports the appearance of proton conductivity by Grotthuss mechanism. Moreover, the band at 3633 cm−1 ascribed to hydrated Mo oxide, which increases with the temperature, explains the increase of catalytic activity when the physical mixture was used in a water gas shift (WGS) reaction. |
Identificador del proyecto | ENE2015-66975-C3-2-R
RTI2018-096294-B-C3 |
Cita | Jurado, L., García Moncada, N., Bobadilla Baladrón, L.F., Romero Sarria, F. y Odriozola Gordón, J.A. (2020). Elucidation of water promoter effect of proton conductor in wgs reaction over pt-based catalyst: An operando drifts study. Catalysts, 10 (8), 841-. |
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