Low Temperature Synthesis and Properties of Gadolinium-Doped Cerium Oxide Nanoparticles

Marina F. S. Machado, Leticia P. R. Moraes, Natalia K. Monteiro, Vincenzo Esposito, Daniel Zanetti De Florio, Debora Marani, Fabio C. Fonseca

Research output: Contribution to journalConference abstract in journalResearchpeer-review

Abstract

Gadolinium-doped cerium oxide (GDC) is an attractive ceramic material for solid oxide fuel cells (SOFCs) both as the electrolyte or in composite electrodes. The Ni/GDC cermet can be tuned as a catalytic layer, added to the conventional Ni/yttria-stabilized zirconia (YSZ), for the internal steam reforming of different fuels. Such an anode allows the SOFC to operate with hydrocarbon fuels by internal reforming. GDC exhibits high oxygen ion conductivity at a wide range of temperatures and displays a high resistance to carbon deposition. However, an inconvenience of ceria-based oxides is the high sintering temperature needed to obtain a fully dense ceramic body, which can result in undesired reactions with YSZ. In this study, a green chemistry route for the synthesis of 10 mol% GDC nanoparticles is proposed. Such a low temperature synthesis provides control over particle size and sinterability of the material. The aqueous precipitation method starts from the nitrates of both cerium and gadolinium and uses excess hexamethylenetetramine (HMT) to produce crystalline GDC at 80 ºC. As-produced powders were found to be GDC crystalline fluorite-type structure, with crystallite size ≤ 10 nm. Thermalgravimetric analysis show a small mass loss and dilatometry profiles show a total retraction of ˃ 20% up to 1400 °C. The electrical properties of the material were studied by impedance spectroscopy measurements of sintered samples in a controlled atmosphere. The samples sintered for 2 hours at 1400 °C exhibited electrical conductivity comparable to previously reported data for GDC.
Original languageEnglish
Article number322
JournalElectrochemical Society. Meeting Abstracts (Online)
VolumeMA2017-03
Pages (from-to)1
ISSN2151-2043
Publication statusPublished - 2017
Event15th International Symposium on Solid Oxide Fuel Cells (SOFC-XV) - Hollywood, United States
Duration: 23 Jul 201728 Jul 2017
Conference number: 15
http://www.electrochem.org/sofc-xv

Conference

Conference15th International Symposium on Solid Oxide Fuel Cells (SOFC-XV)
Number15
CountryUnited States
CityHollywood
Period23/07/201728/07/2017
Internet address

Cite this

Machado, M. F. S., P. R. Moraes, L., Monteiro, N. K., Esposito, V., Zanetti De Florio, D., Marani, D., & C. Fonseca, F. (2017). Low Temperature Synthesis and Properties of Gadolinium-Doped Cerium Oxide Nanoparticles. Electrochemical Society. Meeting Abstracts (Online), MA2017-03, 1. [322].
Machado, Marina F. S. ; P. R. Moraes, Leticia ; Monteiro, Natalia K. ; Esposito, Vincenzo ; Zanetti De Florio, Daniel ; Marani, Debora ; C. Fonseca, Fabio. / Low Temperature Synthesis and Properties of Gadolinium-Doped Cerium Oxide Nanoparticles. In: Electrochemical Society. Meeting Abstracts (Online). 2017 ; Vol. MA2017-03. pp. 1.
@article{cc07156a88d34eedabb7c9ddb979dc2f,
title = "Low Temperature Synthesis and Properties of Gadolinium-Doped Cerium Oxide Nanoparticles",
abstract = "Gadolinium-doped cerium oxide (GDC) is an attractive ceramic material for solid oxide fuel cells (SOFCs) both as the electrolyte or in composite electrodes. The Ni/GDC cermet can be tuned as a catalytic layer, added to the conventional Ni/yttria-stabilized zirconia (YSZ), for the internal steam reforming of different fuels. Such an anode allows the SOFC to operate with hydrocarbon fuels by internal reforming. GDC exhibits high oxygen ion conductivity at a wide range of temperatures and displays a high resistance to carbon deposition. However, an inconvenience of ceria-based oxides is the high sintering temperature needed to obtain a fully dense ceramic body, which can result in undesired reactions with YSZ. In this study, a green chemistry route for the synthesis of 10 mol{\%} GDC nanoparticles is proposed. Such a low temperature synthesis provides control over particle size and sinterability of the material. The aqueous precipitation method starts from the nitrates of both cerium and gadolinium and uses excess hexamethylenetetramine (HMT) to produce crystalline GDC at 80 ºC. As-produced powders were found to be GDC crystalline fluorite-type structure, with crystallite size ≤ 10 nm. Thermalgravimetric analysis show a small mass loss and dilatometry profiles show a total retraction of ˃ 20{\%} up to 1400 °C. The electrical properties of the material were studied by impedance spectroscopy measurements of sintered samples in a controlled atmosphere. The samples sintered for 2 hours at 1400 °C exhibited electrical conductivity comparable to previously reported data for GDC.",
author = "Machado, {Marina F. S.} and {P. R. Moraes}, Leticia and Monteiro, {Natalia K.} and Vincenzo Esposito and {Zanetti De Florio}, Daniel and Debora Marani and {C. Fonseca}, Fabio",
year = "2017",
language = "English",
volume = "MA2017-03",
pages = "1",
journal = "Electrochemical Society. Meeting Abstracts (Online)",
issn = "2151-2043",

}

Machado, MFS, P. R. Moraes, L, Monteiro, NK, Esposito, V, Zanetti De Florio, D, Marani, D & C. Fonseca, F 2017, 'Low Temperature Synthesis and Properties of Gadolinium-Doped Cerium Oxide Nanoparticles', Electrochemical Society. Meeting Abstracts (Online), vol. MA2017-03, 322, pp. 1.

Low Temperature Synthesis and Properties of Gadolinium-Doped Cerium Oxide Nanoparticles. / Machado, Marina F. S. ; P. R. Moraes, Leticia; Monteiro, Natalia K. ; Esposito, Vincenzo; Zanetti De Florio, Daniel; Marani, Debora; C. Fonseca, Fabio.

In: Electrochemical Society. Meeting Abstracts (Online), Vol. MA2017-03, 322, 2017, p. 1.

Research output: Contribution to journalConference abstract in journalResearchpeer-review

TY - ABST

T1 - Low Temperature Synthesis and Properties of Gadolinium-Doped Cerium Oxide Nanoparticles

AU - Machado, Marina F. S.

AU - P. R. Moraes, Leticia

AU - Monteiro, Natalia K.

AU - Esposito, Vincenzo

AU - Zanetti De Florio, Daniel

AU - Marani, Debora

AU - C. Fonseca, Fabio

PY - 2017

Y1 - 2017

N2 - Gadolinium-doped cerium oxide (GDC) is an attractive ceramic material for solid oxide fuel cells (SOFCs) both as the electrolyte or in composite electrodes. The Ni/GDC cermet can be tuned as a catalytic layer, added to the conventional Ni/yttria-stabilized zirconia (YSZ), for the internal steam reforming of different fuels. Such an anode allows the SOFC to operate with hydrocarbon fuels by internal reforming. GDC exhibits high oxygen ion conductivity at a wide range of temperatures and displays a high resistance to carbon deposition. However, an inconvenience of ceria-based oxides is the high sintering temperature needed to obtain a fully dense ceramic body, which can result in undesired reactions with YSZ. In this study, a green chemistry route for the synthesis of 10 mol% GDC nanoparticles is proposed. Such a low temperature synthesis provides control over particle size and sinterability of the material. The aqueous precipitation method starts from the nitrates of both cerium and gadolinium and uses excess hexamethylenetetramine (HMT) to produce crystalline GDC at 80 ºC. As-produced powders were found to be GDC crystalline fluorite-type structure, with crystallite size ≤ 10 nm. Thermalgravimetric analysis show a small mass loss and dilatometry profiles show a total retraction of ˃ 20% up to 1400 °C. The electrical properties of the material were studied by impedance spectroscopy measurements of sintered samples in a controlled atmosphere. The samples sintered for 2 hours at 1400 °C exhibited electrical conductivity comparable to previously reported data for GDC.

AB - Gadolinium-doped cerium oxide (GDC) is an attractive ceramic material for solid oxide fuel cells (SOFCs) both as the electrolyte or in composite electrodes. The Ni/GDC cermet can be tuned as a catalytic layer, added to the conventional Ni/yttria-stabilized zirconia (YSZ), for the internal steam reforming of different fuels. Such an anode allows the SOFC to operate with hydrocarbon fuels by internal reforming. GDC exhibits high oxygen ion conductivity at a wide range of temperatures and displays a high resistance to carbon deposition. However, an inconvenience of ceria-based oxides is the high sintering temperature needed to obtain a fully dense ceramic body, which can result in undesired reactions with YSZ. In this study, a green chemistry route for the synthesis of 10 mol% GDC nanoparticles is proposed. Such a low temperature synthesis provides control over particle size and sinterability of the material. The aqueous precipitation method starts from the nitrates of both cerium and gadolinium and uses excess hexamethylenetetramine (HMT) to produce crystalline GDC at 80 ºC. As-produced powders were found to be GDC crystalline fluorite-type structure, with crystallite size ≤ 10 nm. Thermalgravimetric analysis show a small mass loss and dilatometry profiles show a total retraction of ˃ 20% up to 1400 °C. The electrical properties of the material were studied by impedance spectroscopy measurements of sintered samples in a controlled atmosphere. The samples sintered for 2 hours at 1400 °C exhibited electrical conductivity comparable to previously reported data for GDC.

M3 - Conference abstract in journal

VL - MA2017-03

SP - 1

JO - Electrochemical Society. Meeting Abstracts (Online)

JF - Electrochemical Society. Meeting Abstracts (Online)

SN - 2151-2043

M1 - 322

ER -

Machado MFS, P. R. Moraes L, Monteiro NK, Esposito V, Zanetti De Florio D, Marani D et al. Low Temperature Synthesis and Properties of Gadolinium-Doped Cerium Oxide Nanoparticles. Electrochemical Society. Meeting Abstracts (Online). 2017;MA2017-03:1. 322.