Oxidation of Carbon Monoxide on Strontium
                                                Ferrate

Lauvstad, Gro Østensen

doi:10.1149/199501.0731pv

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“…Iron(IV)-containing perovskites are extensively used in catalysis (6)(7)(8)(9)(10)(11)(12) and electrocatalysis (13)(14)(15)(16)(17)(18)(19). Their applications are largely related to oxidations and electrooxidations.…”

Section: Introductionmentioning

confidence: 99%

Synthesis ofAFeO2.5+x(0≤x≤0.5;A=Sr, Ca) Mixed Oxides from the Oxidative Thermal Decomposition ofA[Fe(CN)5NO]·4H2O

Gómez

Morán

Carbonio

et al. 1999

Journal of Solid State Chemistry

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Section: Introductionmentioning

confidence: 99%

Synthesis ofAFeO2.5+x(0≤x≤0.5;A=Sr, Ca) Mixed Oxides from the Oxidative Thermal Decomposition ofA[Fe(CN)5NO]·4H2O

Gómez

Morán

Carbonio

et al. 1999

Journal of Solid State Chemistry

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Carbon dioxide reduction on gadolinia-doped ceria cathodes

2008

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AC impedance spectroscopy has been performed on 40 mol% gadolinia-doped ceria electrodes on yttria stabilized zirconia (YSZ) at 700-950°C in reducing CO/CO 2 atmospheres. Area-specific-resistance (ASR) values for this electrode were in the range of 0.8-37 Ω-cm 2 , about two orders of magnitude lower than measurements on Pt electrodes and slightly lower than data on Ni-YSZ electrodes in the literature under similar temperature and partial pressure of oxygen (P O 2 ) conditions. A continuum-based model of this electrode is described and an analysis performed to extract the vacancy diffusion coefficient (D v ) and surface exchange rate coefficient (R 0 ) as a function of temperature and P O 2 , from the impedance results. The D v data agree reasonably well with published measurements of the tracer diffusion coefficient (D ⁎ ) based on isotope profiling by secondary ion mass spectroscopy (SIMS) and conductivity measurements on 40 mol% GDC. The R 0 values are a factor of 3 lower than the published measurements of the surface reaction rate (k) obtained from isothermal thermogravimetric relaxation, and decrease with increasing P O 2 . Values of the thermodynamic factor (A) calculated from the fitted model parameters matched well with those calculated from oxygen nonstoichiometry data in the literature. Published by Elsevier B.V.

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Oxidation of Carbon Monoxide on Strontium Ferrate

Cited by 2 publications

References 0 publications

Synthesis ofAFeO2.5+x(0≤x≤0.5;A=Sr, Ca) Mixed Oxides from the Oxidative Thermal Decomposition ofA[Fe(CN)5NO]·4H2O

Synthesis ofAFeO2.5+x(0≤x≤0.5;A=Sr, Ca) Mixed Oxides from the Oxidative Thermal Decomposition ofA[Fe(CN)5NO]·4H2O

Carbon dioxide reduction on gadolinia-doped ceria cathodes

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