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Шкерин, С. Н.; Gormsen, S.; Primdahl, S.; Mogensen, Mogens Bjerg

doi:10.1023/a:1026163118315

Cited by 4 publications

(18 citation statements)

References 6 publications

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“…Electrode conductance values for Pt on the 600°C-deposited YSZ film and on the single crystal YSZ surfaces range from a factor of two to ten times higher than that on the tape-cast YSZ. These values are similar to the best reported values obtained with sputtered [25,34], gauze [34,35], and wire [36,37] platinum electrodes on YSZ, though there is significant variability within reported literature values. Note that, despite the simplified electrode structures employed in previous studies, the TPB lengths used to normalize those values are sometimes rather crude estimates.…”

Section: Resultssupporting

confidence: 87%

“…The thin film YSZ specimens prepared here are unique in that they are prepared from high purity metal alloy targets (nominal Si concentration of 3.6 ppm). The [36] and [37] are based on measurements in pure O 2 whereas all other measurements were in air). A reference line indicates a slope of 1.5 eV.…”

Section: Resultsmentioning

confidence: 99%

“…8 The low frequency-electrode polarization-conductance, normalized by the TPB length, for platinum electrodes on YSZ films deposited on an unheated (closed squares) and 600°C (closed circles) fused silica substrate. The dashed lines are extrapolated from the indicated references (note [36] and [37] are based on measurements in pure O 2 whereas all other measurements were in air). A reference line indicates a slope of 1.5 eV.…”

Section: Resultsmentioning

confidence: 99%

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Highly enhanced electrochemical performance of silicon-free platinum–yttria stabilized zirconia interfaces

2008

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In the drive to achieve economically viable solid oxide fuel cells, efforts have been directed towards substantially decreasing their operating temperature. Unfortunately, these efforts have been hindered by extremely sluggish electrode kinetics at reduced temperatures. In this report, we show that silicon impurities on the surface of the electrolyte play a critical role in influencing electrode kinetics. More specifically, improvements by as much as three orders of magnitude are reported for the performance of platinum electrodes on yttria-stabilized zirconia electrolytes prepared as high purity thin films with a largely Sifree surface. These improvements in performance are estimated to enable operation of a solid oxide fuel cell down to approximately 400°C.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Highly enhanced electrochemical performance of silicon-free platinum–yttria stabilized zirconia interfaces

2008

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“…Each reaction occurs on a particular interface. The probable extension of the electrochemical reaction region along other interfaces (metal/ gas [5,11,26,27] or electrolyte/gas [28][29][30][31]) makes the above reaction scheme more complicated.…”

Section: Introductionmentioning

confidence: 99%

Effect of microstructure on the electrochemical behavior of Pt/YSZ electrodes

et al. 2007

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Two types of O 2 ,Pt/YSZ electrode preparation (Pt/YSZ cermet and sputtered platinum film) have been characterized by SEM and by cyclic voltammetry and chronoamperometry at 450°C in 20 kPa oxygen. Cyclic voltammetry on the cermet and on the as-sputtered non-porous film electrode evidenced the characteristics of the PtO x /Pt couple. The corresponding redox reaction occurs at the metal/electrolyte interface and it manifests itself by an anodic wave and one of more cathodic peaks in the voltammogram. Heat treatment of the sputtered electrode at 700°C in oxygen atmosphere resulted in a porous structure by coalescence of the film. Cyclic voltammetry of the porous film electrode featured the characteristics of the O 2 /O 2) couple, i.e. the redox reaction of gaseous oxygen occurring at the tpb. Chronoamperometry at anodic potentials showed similar features for both electrode preparations: an initial inhibition, a current peak and a slow activation, the latter being related to the phenomenon of electrochemical promotion of catalysis.

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“…4) [47][48][49][50][51][52][53][54][55][56], which consisted of a large number of statistically identical contacts that were welded by diffusion under pressure in identical conditions, made it possible to solve the problem of reproducibility of properties of electrodes. It is precisely such an electrode that made it possible to isolate the influence of the composition of electrolyte [47,49] and the orientation of the surface of a single-crystal electrolyte [54,55] on the rate of the oxygen reaction.…”

Section: Dense Electrodesmentioning

confidence: 99%

Current Production Processes on Metallic Electrodes in Contact with Oxygen-Conducting Solid Electrolytes with Face-Centered Cubic Lattice of the Fluorite Type

Шкерин

2005

Russ J Electrochem

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The data concerning the processes of current production that occur in the electrode system é 2 ,Pt/O 2-, which are available from relevant literature sources, are considered. Major progress in the understanding of the kinetics of an oxygen reaction has been attained with the application of model electrodes and cells, as well as at the expense of the application of such physical methods as a radiotracer method and atomic force microscopy. A discussion of model notions on the specific features of the occurrence of an oxygen reaction, which are formed on the basis of consideration of experimental results is the major subject matter of this communication. It is claimed that modernization of an existing model with allowance made for the fact of the existence, on the surface of an electrolyte with a face-centered cubic lattice, of a layer with another structure gives one a chance to also describe experimental results that cannot be described in the framework of an existing model.

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Untitled

Cited by 4 publications

References 6 publications

Highly enhanced electrochemical performance of silicon-free platinum–yttria stabilized zirconia interfaces

Highly enhanced electrochemical performance of silicon-free platinum–yttria stabilized zirconia interfaces

Effect of microstructure on the electrochemical behavior of Pt/YSZ electrodes

Current Production Processes on Metallic Electrodes in Contact with Oxygen-Conducting Solid Electrolytes with Face-Centered Cubic Lattice of the Fluorite Type

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