Effect of preparation method on the properties of nanostructured gadolinia-doped ceria materials for IT-SOFCs

Fernando F. Munoz; A. Gabriela Leyva; Richard T. Baker; Rodolfo O. Fuentes

doi:10.1016/j.ijhydene.2011.12.094

Effect of preparation method on the properties of nanostructured gadolinia-doped ceria materials for IT-SOFCs

Fernando F. Munoz, A. Gabriela Leyva, Richard T. Baker, Rodolfo O. Fuentes^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

In order to obtain different morphologies, nanostructured Gd_0.1Ce_0.9O_1.95 (GDC10) and Gd_0.2Ce_0.8O_1.90 (GDC20) were synthesized using three different chemical methods: reverse microemulsion (RM), cation complexation (CC) and template-filling (TF). The resulting materials were characterized by synchrotron radiation X-ray diffraction (SR-XRD), by X-ray absorption near-edge spectroscopy (XANES) and by scanning and high resolution transmission electron microscopy (SEM and HRTEM). All nanostructured mixed oxides were found to have a cubic crystal phase (Fm3m space group) with an average crystallite sizes ranging from 9.6 to 132 nm. Tubular nanostructured GDC10 obtained using a template-filling method exhibited the largest specific surface area (97 m² g^-1) while the lowest values were obtained using the cation complexation method (23 m² g^-1). XANES results indicated that the extent of reduction of these materials was small. Nevertheless, the Ce³⁺ ion was detected. Preliminary catalytic studies showed that the tubular nanostructured (TF) GDC10 samples exhibited better catalytic activity for CH₄ oxidation than the CC and RM nanopowders of the same chemical composition.

Original language	English
Pages (from-to)	14854-14863
Number of pages	10
Journal	International Journal of Hydrogen Energy
Volume	37
Issue number	19
DOIs	https://doi.org/10.1016/j.ijhydene.2011.12.094
Publication status	Published - 1 Oct 2012

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@article{7bd5cfb1f22748a9932881d5e7242251,

title = "Effect of preparation method on the properties of nanostructured gadolinia-doped ceria materials for IT-SOFCs",

abstract = "In order to obtain different morphologies, nanostructured Gd0.1Ce0.9O1.95 (GDC10) and Gd0.2Ce0.8O1.90 (GDC20) were synthesized using three different chemical methods: reverse microemulsion (RM), cation complexation (CC) and template-filling (TF). The resulting materials were characterized by synchrotron radiation X-ray diffraction (SR-XRD), by X-ray absorption near-edge spectroscopy (XANES) and by scanning and high resolution transmission electron microscopy (SEM and HRTEM). All nanostructured mixed oxides were found to have a cubic crystal phase (Fm3m space group) with an average crystallite sizes ranging from 9.6 to 132 nm. Tubular nanostructured GDC10 obtained using a template-filling method exhibited the largest specific surface area (97 m2 g-1) while the lowest values were obtained using the cation complexation method (23 m2 g-1). XANES results indicated that the extent of reduction of these materials was small. Nevertheless, the Ce3+ ion was detected. Preliminary catalytic studies showed that the tubular nanostructured (TF) GDC10 samples exhibited better catalytic activity for CH4 oxidation than the CC and RM nanopowders of the same chemical composition.",

author = "Munoz, {Fernando F.} and {Gabriela Leyva}, A. and Baker, {Richard T.} and Fuentes, {Rodolfo O.}",

year = "2012",

month = oct,

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doi = "10.1016/j.ijhydene.2011.12.094",

language = "English",

volume = "37",

pages = "14854--14863",

journal = "International Journal of Hydrogen Energy",

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number = "19",

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T1 - Effect of preparation method on the properties of nanostructured gadolinia-doped ceria materials for IT-SOFCs

AU - Munoz, Fernando F.

AU - Gabriela Leyva, A.

AU - Baker, Richard T.

AU - Fuentes, Rodolfo O.

PY - 2012/10/1

Y1 - 2012/10/1

N2 - In order to obtain different morphologies, nanostructured Gd0.1Ce0.9O1.95 (GDC10) and Gd0.2Ce0.8O1.90 (GDC20) were synthesized using three different chemical methods: reverse microemulsion (RM), cation complexation (CC) and template-filling (TF). The resulting materials were characterized by synchrotron radiation X-ray diffraction (SR-XRD), by X-ray absorption near-edge spectroscopy (XANES) and by scanning and high resolution transmission electron microscopy (SEM and HRTEM). All nanostructured mixed oxides were found to have a cubic crystal phase (Fm3m space group) with an average crystallite sizes ranging from 9.6 to 132 nm. Tubular nanostructured GDC10 obtained using a template-filling method exhibited the largest specific surface area (97 m2 g-1) while the lowest values were obtained using the cation complexation method (23 m2 g-1). XANES results indicated that the extent of reduction of these materials was small. Nevertheless, the Ce3+ ion was detected. Preliminary catalytic studies showed that the tubular nanostructured (TF) GDC10 samples exhibited better catalytic activity for CH4 oxidation than the CC and RM nanopowders of the same chemical composition.

AB - In order to obtain different morphologies, nanostructured Gd0.1Ce0.9O1.95 (GDC10) and Gd0.2Ce0.8O1.90 (GDC20) were synthesized using three different chemical methods: reverse microemulsion (RM), cation complexation (CC) and template-filling (TF). The resulting materials were characterized by synchrotron radiation X-ray diffraction (SR-XRD), by X-ray absorption near-edge spectroscopy (XANES) and by scanning and high resolution transmission electron microscopy (SEM and HRTEM). All nanostructured mixed oxides were found to have a cubic crystal phase (Fm3m space group) with an average crystallite sizes ranging from 9.6 to 132 nm. Tubular nanostructured GDC10 obtained using a template-filling method exhibited the largest specific surface area (97 m2 g-1) while the lowest values were obtained using the cation complexation method (23 m2 g-1). XANES results indicated that the extent of reduction of these materials was small. Nevertheless, the Ce3+ ion was detected. Preliminary catalytic studies showed that the tubular nanostructured (TF) GDC10 samples exhibited better catalytic activity for CH4 oxidation than the CC and RM nanopowders of the same chemical composition.

U2 - 10.1016/j.ijhydene.2011.12.094

DO - 10.1016/j.ijhydene.2011.12.094

M3 - Article

SN - 0360-3199

VL - 37

SP - 14854

EP - 14863

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 19

ER -

Effect of preparation method on the properties of nanostructured gadolinia-doped ceria materials for IT-SOFCs

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