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763756

Yttrium-doped ceria

Name: Yttrium-doped ceria
Brand: ALDRICH

nanopowder, yttria 20 mol %, <50 nm particle size (TEM), 99.9% trace metals basis

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Synonym(s):

20YDC, Cerium(IV) oxide-yttria doped, YDC-20, YDC20, Cerium yttrium oxide, YDC, Yttria doped ceria, Yttrium doped ceria

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About This Item

Empirical Formula (Hill Notation):

CeO₂/Y₂O₃

CAS Number:

170033-03-1

UNSPSC Code:

26111700

PubChem Substance ID:

329767074

NACRES:

NA.23

MDL number:

MFCD04039918

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Properties

Product Name

Cerium(IV) oxide-yttria doped, nanopowder, yttria 20 mol %, <50 nm particle size (TEM), 99.9% trace metals basis

Quality Segment

100

assay

99.9% trace metals basis

form

nanopowder

composition

yttria, 20 mol %

reaction suitability

core: cerium

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particle size

<50 nm (TEM)

application(s)

catalysts
glass & ceramic
hydrogen and fuel cell

greener alternative category

, Enabling

SMILES string

O=[Ce]=O.O=[Y]O[Y]=O

InChI

1S/Ce.5O.2Y

InChI key

XVLUKJGVKWVXMP-UHFFFAOYSA-N

Description

General description

8mol% Yttria doped ceria may be prepared by carbonate coprecipitation technique. Yttria doped ceria exhibits high ionic conductivity, low activation energy and small grain boundary resistance. The effect of microstructure on the electrolytic properties was investigated in detail.

Cerium(IV) oxide-yttria doped (YDC-20) is an electrolytic material that is used as an alternative to zirconia-based electrolytes. Its properties include high ionic conductivity (0.01 S cm⁻¹), electronic conductivity (3 S cm⁻¹), enhanced electrode reactions, and high oxygen surface exchange coefficient.

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Application

YDC-20 can be used as an electrolyte in the fabrication of solid oxide fuel cells (SOFCs). A thin film of YDC-20 (~17.5 nm) effectively reduces the cathode/interfacial energy by 0.1 eV and increases the exchange current density by a factor of 4. It can be operated with a temperature range of 300° - 500°C.

They are promising ceramic electrolytes for solid oxide fuel cells operating at low temperatures of 500-700°C (IT-SOFC). Doped ceria interlayers in between bulk yttria-stabilized zirconia electrolyte further enhance the performance of SOFCs.

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Storage Class

11 - Combustible Solids

Flash Point (°F)

Not applicable

Flash Point (°C)