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Direct-current-induced transformation at the interface between platinum anode and holmium-doped ceria electrolyte
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10.1063/1.3142263
/content/aip/journal/jap/105/11/10.1063/1.3142263
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/11/10.1063/1.3142263

Figures

Image of FIG. 1.
FIG. 1.

Schematic of setup, showing a current was applied on a disk-shaped HDC sample.

Image of FIG. 2.
FIG. 2.

[(a)–(d)] SEM image of the anode-side surface (after the dc test) of HDC samples with different doping level and sintered at different temperature. The testing temperature was and the duration was 1 h. (e) Products collected from sample (d). (f) Morphology at the bottom of circular holes on (d). [(g) and (h)] The testing temperature decreased to .

Image of FIG. 3.
FIG. 3.

(a) TEM image and (b) typical [110] SAED pattern taken from the 25HDC bulk sample sintered at . (c) TEM image of a grain in coarse-grained particles and (d) of the nanocrystalline particles formed at the anode/electrolyte interface. Insets are enlarged HRTEM images and SAED patterns. The aperture size for SAED was about on the image.

Image of FIG. 4.
FIG. 4.

(a) Ce -edge and (b) oxygen -edge of the 25HDC bulk sample sintered at and two kinds of dc-induced products formed at the anode/electrolyte interface.

Image of FIG. 5.
FIG. 5.

Schematics of (a) the initiation of dc-induced ordering at Pt/HDC interface, (b) the diffusion of Ho cations and appearance of cations around the ordered phase, and (c) the development of dc-induced phase and the formation of circular holes on the anodic side surface of HDC. Coarse-grained and nanocrystalline particles are denoted as I and II in (c).

Tables

Generic image for table
Table I.

Characteristics of the dc-induced products.

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/content/aip/journal/jap/105/11/10.1063/1.3142263
2009-06-09
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Direct-current-induced transformation at the interface between platinum anode and holmium-doped ceria electrolyte
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/11/10.1063/1.3142263
10.1063/1.3142263
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