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Electrochemical Removal of NOx on Ceria-Based Catalyst-Electrodes


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1

Université de Lyon, CNRS, Université Claude Bernard Lyon 1, IRCELYON, UMR 5256, 2 Avenue A. Einstein, 69626 Villeurbanne, France

2

Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, 100084 Beijing, China

3

Ecole Nationale Supérieure des Mines, SPIN-EMSE, CNRS: UMR5307, LGF, F-42023 Saint-Etienne, France





*

Author to whom correspondence should be addressed.



Academic Editors: Enrique Rodríguez-Castellón, Agustín Bueno-López and Elisa Moretti

Abstract This study reports the electrochemical properties for NOx reduction of a ceria-based mixed ionic electronic conducting porous electrode promoted by Pt nanoparticles, as efficient catalyst for NO oxidation, and BaO, as sorbent to store NOx. This catalytic layer was deposited by screen-printing on a dense membrane of gadolinia-doped ceria, an O2− ionic conductor. The targeted Ba and Pt loadings were 150 and 5 μg-cm2, respectively. The NOx selective electrochemical reduction was performed between 400 °C and 500 °C with and without oxygen in the feed. Variations of the open-circuit voltage with time were found to be a good sensor of the NOx storage process on the ceria-based catalyst-electrode. However, no N2 production was observed in the presence of O2 phase in spite of nitrates formation. View Full-Text

Keywords: nitrogen oxides; gadolinia-doped ceria; BaO; Pt; NOx storage; NOx electrochemical reduction nitrogen oxides; gadolinia-doped ceria; BaO; Pt; NOx storage; NOx electrochemical reduction





Autor: Xi Wang 1,2, Alexandre Westermann 1, Yi Xiang Shi 2, Ning Sheng Cai 2, Mathilde Rieu 3, Jean-Paul Viricelle 3 and Philippe Vernoux 1,*

Fuente: http://mdpi.com/



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