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BaFe1−xCuxO3 Perovskites as Soot Oxidation Catalysts for Gasoline Particulate Filters (GPF): A Preliminary Study

  • C. Moreno-Marcos
  • V. Torregrosa-Rivero
  • V. Albaladejo-Fuentes
  • M. S. Sánchez-Adsuar
  • M. J. Illán-Gómez
Original Paper
  • 40 Downloads

Abstract

A series of BaFe1−xCuxO3 catalysts (x = 0, 0.1, 0.3 and 0.4) have been synthetized, characterized and used for soot oxidation in gasoline direct injection (GDI) exhaust conditions. The characterization of the catalysts (by BET, ICP-OES, XRD, XPS, H2-TPR and O2-TPD) reveals that copper is incorporated into the perovskite lattice leading to: (i) the distortion of the original hexagonal perovskite structure for the lowest copper content catalyst (BFC1) and the modification of the structure, from hexagonal to cubic, for the catalysts with higher copper content (BFC3 and BFC4), (ii) the generation of a BaOx–CuOx oxide as minority segregated phase for BFC4 catalyst, (iii) the increase in the amount of oxygen surface vacancies for BFC3 and BFC4 catalysts, and (iv) the decrease in the total amount of O2 released during O2-TPD experiments. All the BaFe1−xCuxO3 perovskites are active for soot oxidation under the highest demanding GDI exhaust conditions (regular stoichiometric GDI operation, i.e., 0% O2). The catalyst with the highest copper content (BFC4) shows the highest soot conversion, related to its largest amount of β-oxygen evolved, and, to the presence of a high amount of copper species (as BaOx–CuOx oxide) on its surface.

Keywords

Fe-based perovskite Gasoline direct injection (GDI) exhaust Soot oxidation catalysts Gasoline particulate filter (GPF) 

Notes

Acknowledgements

The authors thank Generalitat Valenciana (PROMETEO/2018/076), Spanish Government (MINECO Project CTQ2015-64801-R) and UE (FEDER Founding) for the financial support. V. Torregrosa- Rivero thanks the Generalitat Valenciana for her Ph.D. Grant (ACIF 2017/221).

Supplementary material

11244_2018_1126_MOESM1_ESM.docx (768 kb)
Supplementary material 1 (DOCX 768 KB)

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Departamento de Química Inorgánica, Facultad de CienciasUniversidad de AlicanteAlicanteSpain

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