Catalytic redox activity and electrical conductivity of nanocrystalline non-stoichiometric cerium oxide

Andreas Tschöpe; Jackie Y. Ying; Harry L. Tuller

doi:10.1016/0925-4005(96)80025-6

Catalytic redox activity and electrical conductivity of nanocrystalline non-stoichiometric cerium oxide

Andreas Tschöpe, Jackie Y. Ying^*, Harry L. Tuller

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

Abstract

Nanocrystalline cerium was synthesized by magnetron sputtering and inert gas condensation. Controlled post-oxidation of the metallic nanoclusters resulted in formation of oxygen-deficient cerium oxide. Catalytic redox reactions such as SO₂ reduction by CO and CO oxidation in air were investigated. A comparison of activity with conventional stoichiometric ceria catalysts was used as a probe to distinguish different surface reactions. Electrical conductivity of nanocrystalline CeO_2-x was investigated by impedance spectroscopy and compared with literature data for single-crystal CeO₂. The results are discussed in terms of the microstructure and defect chemistry of nanocrystalline cerium oxide.

Original language	English
Pages (from-to)	111-114
Number of pages	4
Journal	Sensors and Actuators B: Chemical
Volume	31
Issue number	1-2
DOIs	https://doi.org/10.1016/0925-4005(96)80025-6
State	Published - Feb 1996
Externally published	Yes

Keywords

Catalytic redox activity
Electrical conductivity
Nanocrystalline cerium oxide

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/0925-4005(96)80025-6

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title = "Catalytic redox activity and electrical conductivity of nanocrystalline non-stoichiometric cerium oxide",

abstract = "Nanocrystalline cerium was synthesized by magnetron sputtering and inert gas condensation. Controlled post-oxidation of the metallic nanoclusters resulted in formation of oxygen-deficient cerium oxide. Catalytic redox reactions such as SO2 reduction by CO and CO oxidation in air were investigated. A comparison of activity with conventional stoichiometric ceria catalysts was used as a probe to distinguish different surface reactions. Electrical conductivity of nanocrystalline CeO2-x was investigated by impedance spectroscopy and compared with literature data for single-crystal CeO2. The results are discussed in terms of the microstructure and defect chemistry of nanocrystalline cerium oxide.",

keywords = "Catalytic redox activity, Electrical conductivity, Nanocrystalline cerium oxide",

author = "Andreas Tsch{\"o}pe and Ying, \{Jackie Y.\} and Tuller, \{Harry L.\}",

year = "1996",

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doi = "10.1016/0925-4005(96)80025-6",

language = "English",

volume = "31",

pages = "111--114",

journal = "Sensors and Actuators B: Chemical",

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publisher = "Elsevier B.V.",

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T1 - Catalytic redox activity and electrical conductivity of nanocrystalline non-stoichiometric cerium oxide

AU - Tschöpe, Andreas

AU - Ying, Jackie Y.

AU - Tuller, Harry L.

PY - 1996/2

Y1 - 1996/2

N2 - Nanocrystalline cerium was synthesized by magnetron sputtering and inert gas condensation. Controlled post-oxidation of the metallic nanoclusters resulted in formation of oxygen-deficient cerium oxide. Catalytic redox reactions such as SO2 reduction by CO and CO oxidation in air were investigated. A comparison of activity with conventional stoichiometric ceria catalysts was used as a probe to distinguish different surface reactions. Electrical conductivity of nanocrystalline CeO2-x was investigated by impedance spectroscopy and compared with literature data for single-crystal CeO2. The results are discussed in terms of the microstructure and defect chemistry of nanocrystalline cerium oxide.

AB - Nanocrystalline cerium was synthesized by magnetron sputtering and inert gas condensation. Controlled post-oxidation of the metallic nanoclusters resulted in formation of oxygen-deficient cerium oxide. Catalytic redox reactions such as SO2 reduction by CO and CO oxidation in air were investigated. A comparison of activity with conventional stoichiometric ceria catalysts was used as a probe to distinguish different surface reactions. Electrical conductivity of nanocrystalline CeO2-x was investigated by impedance spectroscopy and compared with literature data for single-crystal CeO2. The results are discussed in terms of the microstructure and defect chemistry of nanocrystalline cerium oxide.

KW - Catalytic redox activity

KW - Electrical conductivity

KW - Nanocrystalline cerium oxide

UR - https://www.scopus.com/pages/publications/0030083981

U2 - 10.1016/0925-4005(96)80025-6

DO - 10.1016/0925-4005(96)80025-6

M3 - Article

AN - SCOPUS:0030083981

SN - 0925-4005

VL - 31

SP - 111

EP - 114

JO - Sensors and Actuators B: Chemical

JF - Sensors and Actuators B: Chemical

IS - 1-2

ER -

Catalytic redox activity and electrical conductivity of nanocrystalline non-stoichiometric cerium oxide

Abstract

Keywords

ASJC Scopus subject areas

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