Electrolyte

Minh, Nguyễn Quang

doi:10.1016/b978-044489568-4/50005-0

Cited by 112 publications

(155 citation statements)

References 134 publications

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“…Electrolytes with apatite-type structure have been studied in last years due to their high ionic conductivity at low temperature and potential application in solid oxide fuel cells (SOFCs) [1][2][3][4][5][6][7][8]. The dominant ion conduction mechanism in these materials is via interstitial oxide ions, in contrast to the commonly used fluorite and perovskite-based electrolytes, where the conduction occurs via oxygen vacancies [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 98%

Lanthanum Germanate‐Based Apatites as Electrolyte for SOFCs

Marrero-López¹,

Díaz-Carrasco²,

Peña-Martínez³

et al. 2011

Fuel Cells

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Germanate apatites with composition La10–xGe5.5Al0.5O26.75–3x/2 have been evaluated for the first time as possible electrolytes for solid oxide fuel cells (SOFCs). Different electrode materials have been considered in this study, i.e. manganite, ferrite, nickelates and cobaltite as cathode materials; and NiO–CGO composite and chromium–manganite as anodes. The chemical compatibility and electrochemical performance of these electrodes with La9.8Ge5.5Al0.5O26.45 have been studied by X‐ray powder diffraction (XRPD) and impedance spectroscopy. The XRPD analysis did not reveal appreciable bulk reactivity with the formation of reaction products between the germanate electrolyte and these electrodes up to 1,200 °C. However, a significant cation interdiffusion was observed by energy dispersive spectroscopy (EDS) at the electrode/electrolyte interface, which leads to a significant decrease of the performance of these electrodes.

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Section: Introductionmentioning

confidence: 98%

Lanthanum Germanate‐Based Apatites as Electrolyte for SOFCs

Marrero-López¹,

Díaz-Carrasco²,

Peña-Martínez³

et al. 2011

Fuel Cells

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“…Current SOFCs often employ yttria-stabilized zirconia (YSZ) as an electrolyte and require an operating temperature of 800-1000°C to minimize ohmic loss [1]. Recently, considerable efforts have been directed to intermediate temperature SOFCs based on the electrolytes of doped ceria.…”

Section: Introductionmentioning

confidence: 99%

Open-circuit voltage of ceria-based thin film SOFC supported on nano-porous alumina

Joo

Choi

2007

Solid State Ionics

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“…Among the different types of fuel cells, particularly, the Polymer Exchange Membrane Fuel Cells (PEMFCs) have been intensively studied during the last few years as a result of the increasing interest on the development of more efficient, and environmentally friendly, ways of energy generation [1,2].…”

Section: Introductionmentioning

confidence: 99%

Preferential CO oxidation (CO-PROX) catalyzed by CuO supported on nanocrystalline CeO2 prepared by a freeze-drying method

Arango-Díaz

Moretti

Talon

et al. 2014

Applied Catalysis A: General

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a b s t r a c tNanocrystalline CeO 2 with a regular size of 9.5 nm was prepared by a freeze-drying method, and subsequent impregnated with a Cu(II) acetate solution, varying the loading of Cu (3, 6, 12 wt.%). The resulting CuO/CeO 2 materials were characterized by N 2 physisorption at −196 • C, HRTEM, H 2 -TPR, X-ray diffraction, Raman spectroscopy and XPS and tested as catalysts in the preferential CO oxidation in a H 2 -rich stream (CO-PROX) in the temperature range • C. In spite of their low specific surface areas the catalysts exhibited a good catalytic performance, resulting active and selective in the CO-PROX reaction at low temperatures. The inhibiting effect of the simultaneous presence of CO 2 (15 vol.%) and H 2 O (10 vol.%) in the reaction mixture on the performance of CuO-CeO 2 catalysts was also investigated. The addition of CO 2 and water in the gas stream depressed CO oxidation up to 160• C, its effect being negligible at higher temperatures. Nevertheless, despite these expected deactivation phenomena, a CO conversion value higher than 90% and a CO 2 selectivity of about 90% was achieved for all the samples at 160• C. The excellent performance, especially shown by the catalyst with 6 wt%. of copper, has been related to the wide dispersion of the copper active sites associated with the high amount of Ce 4+ species before reaction.

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Electrolyte

Cited by 112 publications

References 134 publications

Lanthanum Germanate‐Based Apatites as Electrolyte for SOFCs

Lanthanum Germanate‐Based Apatites as Electrolyte for SOFCs

Open-circuit voltage of ceria-based thin film SOFC supported on nano-porous alumina

Preferential CO oxidation (CO-PROX) catalyzed by CuO supported on nanocrystalline CeO2 prepared by a freeze-drying method

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