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Open AccessArticle

Elucidation of Water Promoter Effect of Proton Conductor in WGS Reaction over Pt-Based Catalyst: An Operando DRIFTS Study

1
Instituto de Ciencia de Materiales de Sevilla and Departamento de Química Inorgánica, Centro Mixto CSIC Universidad de Sevilla, Av. Américo Vespucio 49, 41092 Sevilla, Spain
2
Institut de chimie et procédés pour l’énergie, l’environnement et la santé (ICPEES), département de Catalyse et Matériaux, Université de Strasbourg, CNRS, 25 rue Becquerel, CEDEX 02, 67087 Strasbourg, France
3
Laboratoire Catalyse et Spectrochimie, ENSICAEN, Université de Caen, CNRS, 6 Boulevard Maréchal Juin, 14050 Caen, France
*
Authors to whom correspondence should be addressed.
Catalysts 2020, 10(8), 841; https://doi.org/10.3390/catal10080841
Received: 29 June 2020 / Revised: 21 July 2020 / Accepted: 23 July 2020 / Published: 25 July 2020
(This article belongs to the Special Issue Catalysts for Water-Gas Shift Reaction)
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. View Full-Text
Keywords: WGS reaction; proton conductor; water activation; Grotthuss’ mechanism; operando DRIFTS WGS reaction; proton conductor; water activation; Grotthuss’ mechanism; operando DRIFTS
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MDPI and ACS Style

Jurado, L.; García-Moncada, N.; Bobadilla, L.F.; Romero-Sarria, F.; Odriozola, J.A. Elucidation of Water Promoter Effect of Proton Conductor in WGS Reaction over Pt-Based Catalyst: An Operando DRIFTS Study. Catalysts 2020, 10, 841. https://doi.org/10.3390/catal10080841

AMA Style

Jurado L, García-Moncada N, Bobadilla LF, Romero-Sarria F, Odriozola JA. Elucidation of Water Promoter Effect of Proton Conductor in WGS Reaction over Pt-Based Catalyst: An Operando DRIFTS Study. Catalysts. 2020; 10(8):841. https://doi.org/10.3390/catal10080841

Chicago/Turabian Style

Jurado, Lole; García-Moncada, Nuria; Bobadilla, Luis F.; Romero-Sarria, Francisca; Odriozola, José A. 2020. "Elucidation of Water Promoter Effect of Proton Conductor in WGS Reaction over Pt-Based Catalyst: An Operando DRIFTS Study" Catalysts 10, no. 8: 841. https://doi.org/10.3390/catal10080841

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