Relation between solid oxide electrolyte surface properties and electrode reaction kinetics

Schouler, E.J.L.

doi:10.1016/0167-2738(83)90115-7

Cited by 33 publications

(22 citation statements)

References 24 publications

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“…At higher temperatures the rate determining step is related to the migration of oxygen vacancies in the electolyte. He also notes that some electronic conductivity of the electrolyte surface has a positive influence [7].…”

Section: Electrode and Electrocatalytic Processmentioning

confidence: 99%

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Electrical and catalytic properties of some oxides with the fluorite or pyrochlore structure

Dijk

Maat

Roelofs

et al. 1984

Materials Research Bulletin

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In view of their possible use as electrocatalysts, several oxides with the fluorite or pyrochlore structure were investigated. Part I of this paper deals with the synthesis, characterization and electrical conductivity of these materials. All lanthanide titanates investigated (partly doped with Bi) show the pyrochlore structure and are poor conductors, except for the compounds containing Tb. For Nd-zirconates, partly substituted with Ce, the degree of order depends on the amount of Ce and temperature treatment. Ionic and in some cases mixed conductivity was observed. Part II reports about the catalytic activity for CO oxidation INTRODUCTION

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Section: Electrode and Electrocatalytic Processmentioning

confidence: 99%

“…[3,[5][6][7]) that both electrode material and electrolyte substrate are of great importance to activity (and selectivity) of the (electrocatalytic) reaction employed. The process studied most frequently is the cathodic and anodic reaction of molecular oxygen, as encountered in oxygen sensors and pumps.…”

Section: Electrode and Electrocatalytic Processmentioning

confidence: 99%

Electrical and catalytic properties of some oxides with the fluorite or pyrochlore structure

Dijk

Maat

Roelofs

et al. 1984

Materials Research Bulletin

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“…Besides properties of the metal surface, the surface of the solid electrolyte, too, is known to have a pronounced influence on the rate of this oxygen exchange reaction at temperatures below 700°C [3][4][5]. It may provide active sites for oxygen adsorption along which adsorbed oxygen species are transported to the noble metal electrode, but the electrolyte surface itself does not participate in the electron transfer reaction as its electronic conductivity is too low.…”

Section: Introductionmentioning

confidence: 99%

Electronic properties of ion-implanted yttria-stabilized zirconia

et al. 1993

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Ion implantation of iron and titanium has been applied to modify the surface properties of polycrystalline yttria-stabilized zirconia ( (ZrO2)o.s7 (YOt.5)o.13 ~ (YSZ)) discs in an attempt to prepare surfaces with a mixed conductivity and by this an enhanced surface oxygen exchange kinetics. Surface-sensitive spectroscopic techniques were applied to investigate the implanted layers as a function of different pretreatments such as oxidation, reduction and annealing. Depth profiles were recorded by Rutherford Backscattering Spectroscopy (RBS) and X-ray Photoelectron Spectroscopy (XPS) in combination with sputtering. Ion Scattering Spectroscopy (ISS) and XPS were used to investigate the surface composition and valency of implanted ions. Electronic properties like the band gap, the work function and the energy difference between the Fermi level and valence band edge (EF--Ev) were obtained from Ultraviolet Photoelectron Spectroscopy (UPS) and Electron Energy Loss Spectroscopy (EELS). Overlayers of Fe203 or TiO2 are formed during oxidation of as-implanted samples. The Fe-and Ti-oxides could be reduced in hydrogen to the oxidation states Fe 2+, Fe ° or Ti 3+. Annealing of the samples leads to decreased surface concentrations of the implanted ions due to in-diffusion. At the surface of the annealed iron-implanted samples, Fe 2+ and metallic Fe could be generated after further reduction whereas at the surface of the annealed Ti-implanted samples only Ti 4+ was detectable.

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“…For oxygen this site will be a surface anion vacancy, the normal and logical 02 adsorption site [2,6,26,28]. Both vacancies and metal ions have been proposed as a CO adsorption site [14,21,22]; considering the immediate vicinity of metal and oxygen ion positions, steric hinderance of the 02 adsorption process by the surface complex formed after CO adsorption can be rationalized.…”

Section: Zirconatesmentioning

confidence: 99%

“…Other investigations on CO oxidation, using lanthanide oxides and fluorite oxides [1, 2,3] indicated or demonstrated the use of lattice oxygen in the reaction. With temperature programmed reduction it is possible to acquire information on the extraction of oxygen from the crystal lattice [4].…”

Section: Introductionmentioning

confidence: 99%

Electrical and catalytic properties of some oxides with the fluorite or pyrochlore structure

Maat

Dijk

Roelofs

et al. 1984

Materials Research Bulletin

View full text Add to dashboard Cite

show abstract

Relation between solid oxide electrolyte surface properties and electrode reaction kinetics

Cited by 33 publications

References 24 publications

Electrical and catalytic properties of some oxides with the fluorite or pyrochlore structure

Electrical and catalytic properties of some oxides with the fluorite or pyrochlore structure

Electronic properties of ion-implanted yttria-stabilized zirconia

Electrical and catalytic properties of some oxides with the fluorite or pyrochlore structure

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