BaFe1−xCuxO3 Perovskites as Active Phase for Diesel (DPF) and Gasoline Particle Filters (GPF)

Torregrosa-Rivero, Verónica; Moreno-Marcos, Carla; Albaladejo-Fuentes, Vicente; Sánchez-Adsuar, María-Salvadora; Illán-Gómez, M.J.

doi:10.3390/nano9111551

Cited by 16 publications

(32 citation statements)

References 68 publications

(186 reference statements)

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“…On the other hand, BFN2E, BFN4E, and BFN8E also present NiO and BaCO 3 peaks showing the heterogeneity of samples after nickel addition. It is remarkable that, in the presence of Ni, the structure of perovskite does not change to cubic, as observed for BaFe 1−x Cu x O 3 series [16,18], thus, it seems to support that Ni is not inserted into the BaFeO 3 perovskite. Instead of that, Ni is forming a new BaNiO 3 perovskite because, as commented above, the tolerance factor (t) for nickel perovskite is closer to the ideal value (see Table 2).…”

Section: Crystalline Structurementioning

confidence: 67%

“…All catalysts show a certain NO x adsorption capacity, which decreases in the presence of Ni. Note that, as observed for other perovskite-based catalysts [15][16][17][18][19], the peak corresponding to NO x desorbed is larger than the peak corresponding to NO x adsorbed due to the amount of NO x adsorbed at room temperature before starting the NO x -TPR experiment which is not registered.…”

Section: No To No 2 Oxidation (No X -Tpr)mentioning

confidence: 84%

“…The corresponding nominal ratio (calculated from the stoichiometric composition of the BaFe 1−x Ni x O 3 catalysts) is 1.5, but all catalysts present an O L /Fe + Ba + Ni ratio lower and far to the nominal one, which indicates that the perovskite structure presents a very low proportion of lattice oxygen, that is, it is a very distorted structure. The use of EDTA as additional chelating agent during sol-gel process seems to promote the distortion of the structure, as BaFeO 3 obtained avoiding the use of EDTA [16,18] presents a higher O L /Fe + Ba + Ni ratio, i.e. , a less distorted structure.…”

Section: Surface Propertiesmentioning

confidence: 99%

“…Mixed oxides with perovskite-like structure (ABO 3 ) present interesting properties to be used as catalysts for different reactions related to the control of pollutants generated by ICEs [12], and they are considered, among others, as a potential alternative to the use of noble metals for soot removal from diesel engines [13][14][15][16][17]. In a previous study, a series of BaFe 1−x Cu x O 3 catalysts (x = 0, 0.1, 0.3 and 0.4) were synthesized, characterized, and tested for soot oxidation under gasoline direct injection (GDI) exhaust conditions [16,18] and diesel exhaust conditions [16]. The BaFe 1−x Cu x O 3 perovskites catalyze both, the NO 2 -assisted diesel soot oxidation and, to a lesser extent, the soot oxidation during the "fuel cut" stage of GDI exhaust conditions (1% O 2 ).…”

Section: Introductionmentioning

confidence: 99%

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BaFe1−xNixO3 Catalysts for NOx-Assisted Diesel Soot Oxidation

et al. 2022

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In this work, it is analyzed the effect of the partial substitution of Fe by Ni in a BaFeO3 perovskite to be used as the catalyst for NOx-assisted diesel soot oxidation. A series of BaFe1−xNixO3 (x = 0, 0.2, 0.4 and 0.8) catalysts have been synthesized by using the sol–gel method. The catalysts have been characterized by ICP-OES, XRD, XPS, O2-TPD, H2-TPR- and TEM. The catalytic activity for NO to NO2 oxidation and NOx-assisted diesel soot oxidation have been determined by Temperature Programmed Reaction experiments (NOx -TPR and Soot-NOx-TPR, respectively) and by isothermal reaction at 450 °C. Ni seems not to be inserted in the BaFeO3 perovskite and, instead of that, BaNiO3 perovskite and NiO are detected on the surface of the perovskite BaFeO3. XPS data reveal the coexistence of Fe(III) and Fe(IV) on the catalyst’s surface (being Fe(III) the main oxidation state) and the presence of oxygen vacancies. All catalysts are active for NO oxidation to NO2, showing BaFeO3 and BaFe0.6Ni0.4O3 the best catalytic performance. BaFe0.6Ni0.4O3 shows the highest proportion of nickel on surface and it combines the highest activity and stability for NOx-assisted diesel soot oxidation. Also, this catalyst presents the highest initial soot oxidation rate which minimizes the accumulation of unreacted soot during reaction.

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Section: Crystalline Structurementioning

confidence: 67%

Section: No To No 2 Oxidation (No X -Tpr)mentioning

confidence: 84%

Section: Surface Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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BaFe1−xNixO3 Catalysts for NOx-Assisted Diesel Soot Oxidation

et al. 2022

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“…Torregrosa-Rivero et al [63] deepened the soot oxidation performance of BaFe 1-x Cu x O 3 catalysts (x = 0, 0.1, 0.3, and 0.4) in the presence of oxygen. For this purpose, TPO with 1% O 2 in He were performed, in order to work under "fuel cuts" GDI exhaust conditions.…”

Section: Perovskite-type Catalysts For Gasoline Soot Oxidationmentioning

confidence: 99%

Catalytic Materials for Gasoline Particulate Filters Soot Oxidation

Matarrese

2021

Catalysts

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The energy efficiency of Gasoline Direct Injection (GDI) engines is leading to a continuous increase in GDI engine vehicle population. Consequently, their particulate matter (soot) emissions are also becoming a matter of concern. As required for diesel engines, to meet the limits set by regulations, catalyzed particulate filters are considered as an effective solution through which soot could be trapped and burnt out. However, in contrast to diesel application, the regeneration of gasoline particulate filters (GPF) is critical, as it occurs with almost an absence of NOx and under oxygen deficiency. Therefore, in the recent years it was of scientific interest to develop efficient soot oxidation catalysts that fit such particular gasoline operating conditions. Among them ceria- and perovskite-based formulations are emerging as the most promising materials. This overview summarizes the very recent academic contributions focusing on soot oxidation materials for GDI, in order to point out the most promising directions in this research area.

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Mn‐Based Mullites for Environmental and Energy Applications

Li,

Wang,

et al. 2024

Advanced Materials

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Mn‐based mullite oxides AMn2O5 (A = lanthanide, Y, Bi) is a novel type of ternary catalyst in terms of their electronic and geometric structures. The coexistence of pyramid Mn3+–O and octahedral Mn4+–O makes the d‐orbital selectively active toward various catalytic reactions. The alternative edge‐ and corner‐sharing stacking configuration constructs the confined active sites and abundant active oxygen species. As a result, they tend to show superior catalytic behaviors and thus gain great attention in environmental treatment and energy conversion and storage. In environmental applications, Mn‐based mullites have been demonstrated to be highly active toward low‐temperature oxidization of CO, NO, volatile organic compounds (VOCs), etc. Recent research further shows that mullites decompose O3 and ozonize VOCs from −20 °C to room temperature. Moreover, mullites enhance oxygen reduction reactions (ORR) and sulfur reduction reactions (SRR), critical kinetic steps in air‐battery and Li–S batteries, respectively. Their distinctive structures also facilitate applications in gas‐sensitive sensing, ionic conduction, high mobility dielectrics, oxygen storage, piezoelectricity, dehydration, H2O2 decomposition, and beyond. A comprehensive review from basic physicochemical properties to application certainly not only gains a full picture of mullite oxides but also provides new insights into designing heterogeneous catalysts.

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BaFe1−xCuxO3 Perovskites as Active Phase for Diesel (DPF) and Gasoline Particle Filters (GPF)

Cited by 16 publications

References 68 publications

BaFe1−xNixO3 Catalysts for NOx-Assisted Diesel Soot Oxidation

BaFe1−xNixO3 Catalysts for NOx-Assisted Diesel Soot Oxidation

Catalytic Materials for Gasoline Particulate Filters Soot Oxidation

Mn‐Based Mullites for Environmental and Energy Applications

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