Catalytic combustion of methane on nano-structured perovskite-type oxides fabricated by ultrasonic spray combustion

Xun, Wei; Hug, P.; Figi, Renato; Trottmann, Matthias; Weidenkaff, Anke; Ferri, Davide

doi:10.1016/j.apcatb.2009.10.017

Cited by 54 publications

(31 citation statements)

References 49 publications

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“…The formation of these porous surfaces was completed during calcination, which was confirmed previously by the comparison of samples prepared by USC with and without citric acid . Citric acid induces a similar process to that observed in the combustion synthesis producing the characteristic morphology observed after calcination.…”

Section: Resultssupporting

confidence: 80%

“…The samples consisted of a heterogeneous size distribution of pseudo‐spherical particles in the range of 0.05‐3 μm. The particles possessed a hollow structure already after synthesis, which is an intrinsic consequence of the synthesis process . USC implicates the evolution of a considerable amount of gaseous products inside the solid spherical particles originating from the precursor droplets produced by the ultrasonic nebulizer.…”

Section: Resultsmentioning

confidence: 99%

“…The perovskite‐type materials were synthesized by ultrasonic spray combustion (USC), using the experimental equipment described in detail elsewhere . Briefly, a precursor solution was atomized using an ultrasonic nebulizer composed of three piezoelectric oscillators.…”

Section: Methodsmentioning

confidence: 99%

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Structural Reversibility of LaCo_1‐xCu_xO₃ Followed by In Situ X‐ray Diffraction and Absorption Spectroscopy

Pereñíguez

Ferri

2018

ChemPhysChem

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Combinations of perovskite-type oxides with transition and precious metals exhibit a remarkable self-regenerable property that could be exploited for numerous practical applications. The objective of the present work was to study the reversibility of structural changes of perovskite-type oxides under cyclic reducing/oxidizing atmosphere by taking advantage of the reducibility of LaCoO . LaCoO and LaCo Cu O were prepared by ultrasonic spray combustion and were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS) and temperature-programmed reduction (TPR). XRD and XAS data confirmed that copper adopted the coordination environment of cobalt at the B-site of the rhombohedral LaCoO under the selected synthesis conditions. The structural evolution under reducing atmosphere was studied by in situ XRD and XANES supporting the assignment of the observed structural changes to the reduction of the perovskite-type oxide from ABB'O (B'=Cu) to B' /ABO and to B' B /A O . Successive redox cycles allowed the observation of a nearly complete reversibility of the perovskite phase, i. e. copper was able to revert into LaCoO upon oxidation. The reversible reduction/segregation of copper and incorporation at the B-site of the perovskite-type oxides could be used in chemical processes where the material can be functionalized by segregation of Cu and protected against irreversible structural changes upon re-oxidation.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%

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Structural Reversibility of LaCo_1‐xCu_xO₃ Followed by In Situ X‐ray Diffraction and Absorption Spectroscopy

Pereñíguez

Ferri

2018

ChemPhysChem

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“…4,. A number of works address the role of the catalyst preparation method and the nature of the oxide precursor [15,19,20,30,31,33,[40][41][42][43]. In particular, the use of precursors related to the naturally occurring mineral known under the name of hydrotalcite has been indicated as providing particularly active mixed oxide catalysts [24,27,34,35,39,45,46].…”

Section: Introductionmentioning

confidence: 99%

Cu/Mn-based mixed oxides derived from hydrotalcite-like precursors as catalysts for methane combustion

Machej

Serwicka

Zimowska

et al. 2014

Applied Catalysis A: General

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“…These catalysts had good performance in the DRM tests [8]. Novel routes for the synthesis of fine metallic or catalyst particles involve ultrasonic aerosolization [9][10][11]. As an example, fine Fe-Ni powder is produced by pyrolysis and reduction of aerosolized chlorides, without the calcination [12].…”

Section: Introductionmentioning

confidence: 99%

Ni-Pd-Al2O3 catalyst supported on reticulated ceramic foam for dry methane reforming

Nikolić¹,

Kamberović²,

Korać³

et al. 2015

Metall Mater Eng

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In the present study, Ni-Pd/Al 2 O 3 catalyst supported on α-Al 2 O 3 based foam was prepared and evaluated in the dry methane reforming process. Corresponding metal chlorides were deposited to the foam surface by impregnation of the foam with ultrasonically aerosolized salt solutions at 473 K and drying at that temperature. Calcination step was excluded and the catalyst was reduced at very low temperature -533 K. The reforming experiment lasted for 3 h, with standing time of 1 h at the following temperatures: 873, 973 and 1023 K. Conclusions on selectivity, catalytic activity and stability were reached on the basis of CO and H 2 yields.

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Catalytic combustion of methane on nano-structured perovskite-type oxides fabricated by ultrasonic spray combustion

Cited by 54 publications

References 49 publications

Structural Reversibility of LaCo_1‐xCu_xO₃ Followed by In Situ X‐ray Diffraction and Absorption Spectroscopy

Structural Reversibility of LaCo_1‐xCu_xO₃ Followed by In Situ X‐ray Diffraction and Absorption Spectroscopy

Cu/Mn-based mixed oxides derived from hydrotalcite-like precursors as catalysts for methane combustion

Ni-Pd-Al2O3 catalyst supported on reticulated ceramic foam for dry methane reforming

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Catalytic combustion of methane on nano-structured perovskite-type oxides fabricated by ultrasonic spray combustion

Cited by 54 publications

References 49 publications

Structural Reversibility of LaCo1‐xCuxO3 Followed by In Situ X‐ray Diffraction and Absorption Spectroscopy

Structural Reversibility of LaCo1‐xCuxO3 Followed by In Situ X‐ray Diffraction and Absorption Spectroscopy

Cu/Mn-based mixed oxides derived from hydrotalcite-like precursors as catalysts for methane combustion

Ni-Pd-Al2O3 catalyst supported on reticulated ceramic foam for dry methane reforming

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Product

Resources

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Structural Reversibility of LaCo_1‐xCu_xO₃ Followed by In Situ X‐ray Diffraction and Absorption Spectroscopy

Structural Reversibility of LaCo_1‐xCu_xO₃ Followed by In Situ X‐ray Diffraction and Absorption Spectroscopy