Redox Property–Local Structure Relationships in the Rh-Loaded CeO2–ZrO2Mixed Oxides

Vlaic, G.; Monte, R. Di; Fornasiero, Paolo; Fonda, Emiliano; Kašpar, Jan; Graziani, M.

doi:10.1006/jcat.1998.2335

Cited by 182 publications

(161 citation statements)

References 28 publications

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“…It thus enables the simultaneous oxidation of CO and hydrocarbons and the reduction of NO. [8,9] Ceria nanoparticles were demonstrated to have no significant adverse effects on the cytotoxicity in a 3D in vitro co-culture model of the epithelial airway barrier for diesel exhaust exposure in such a way that their use as a fuel-borne catalyst can be advantageous, though its long-term effects still remain to be elucidated. [10] They have also been proposed for biomedical applications, for example in sun creams [11] and more recently in the form of nanocontainers as drug carriers for the prevention of, for example, implant infections.…”

Section: Introductionmentioning

confidence: 99%

Toxicity and Protective Effects of Cerium Oxide Nanoparticles (Nanoceria) Depending on Their Preparation Method, Particle Size, Cell Type, and Exposure Route

Gagnon

Fromm

2015

Eur J Inorg Chem

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Nanoceria (cerium oxide nanoparticles) toxicity is currently a concern because of its use in motor vehicles in order to reduce carbon monoxide (CO), nitrogen oxides (NOx), and hydrocarbons in exhaust gases. In addition, many questions arise with respect to its biomedical applications exploiting its potential to protect cells against irradiation and oxidative stress. Indeed, toxicology studies on nanoceria report results that seem contradictory, demonstrating toxic effects in some studies, protective effects in others, and sometimes little or no effect at all. The variability in the experimental setups and particle characterization makes these studies difficult to compare and the toxicity of newly developed nanoceria materials challenging to predict. This microreview aims to compare the toxicity of nanoceria in terms of preparation method, particle size, concentration, host organism, and exposure method.

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Section: Introductionmentioning

confidence: 99%

Toxicity and Protective Effects of Cerium Oxide Nanoparticles (Nanoceria) Depending on Their Preparation Method, Particle Size, Cell Type, and Exposure Route

Gagnon

Fromm

2015

Eur J Inorg Chem

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“…[2][3][4][5][6][7] For Ce 0.5 Zr 0.5 O 2 , eight oxygen atoms around a central Zr atom are expected 8 (two shells of four atoms for a tetragonal structure or one shell of eight atoms for a cubic structure). As already pointed out by Yashima, 9 the method used for the EXAFS analysis can drastically affect the obtained results.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies indicate that the OSC of ZrO 2 based materials are closely related to their structure. 2,3 It is therefore indispensable to unambiguously determine their structural properties.…”

Section: Introductionmentioning

confidence: 99%

Understanding of Enhanced Oxygen Storage Capacity in Ce_0.5Zr_0.5O₂: The Presence of an Anharmonic Pair Distribution Function in the Zr−O₂ Subshell as Analyzed by XAFS Spectroscopy

et al. 2001

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Standard EXAFS analysis on Ce x Zr 1-x O 2 mixed oxides leads to incorrect structural parameters. A comparison of XRD Rietveld analysis with an EXAFS study of a Y-doped reference compound and a Ce 0.5 Zr 0.5 O 2 catalyst showed that in order to obtain reliable structural parameters with EXAFS an anharmonic pair distribution function has to be used for the analysis of the second Zr-O bond. The anharmonicity of the second Zr-O subshell points to a much weaker Zr-O bond than in the first Zr-O subshell. A lamellar type structural model explains the high oxygen storage capacity of Ce 0.5 Zr 0.5 O 2 . The short Zr-O 1 distance corresponds to the intralayer Zr-O bond and the much weaker Zr-O 2 distance to the interlayer Zr-O interaction. The oxygen storage capacity is determined by the interlayer Zr-O interaction.

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“…In the particular case of nickel, we have already demonstrated the feasibility of this process for the fabrication of Ni/ceria composites [16]. The present research represents the first step of a process aiming to achieve, by electrodeposition, the synthesis of nickel and rare earth oxides, having both good electronic and ionic conductivity [19][20][21][22][23], as potential materials for SOFC electrodes.…”

Section: Introductionmentioning

confidence: 74%

Electrodeposition of a Au-Dy2O3 Composite Solid Oxide Fuel Cell Catalyst from Eutectic Urea/Choline Chloride Ionic Liquid

Mele

Bozzini

2012

Energies

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Abstract:In this research we have fabricated and tested Au/Dy 2 O 3 composites for applications as Solid Oxide Fuel Cell (SOFC) electrocatalysts. The material was obtained by a process involving electrodeposition of a Au-Dy alloy from a urea/choline chloride ionic liquid electrolyte, followed by selective oxidation of Dy to Dy 2 O 3 in air at high temperature. The electrochemical kinetics of the electrodeposition bath were studied by cyclic voltammetry, whence optimal electrodeposition conditions were identified. The heat-treated material was characterised from the morphological (scanning electron microscopy), compositional (X-ray fluorescence spectroscopy) and structural (X-ray diffractometry) points of view. The electrocatalytic activity towards H 2 oxidation and O 2 reduction was tested at 650 °C by electrochemical impedance spectrometry. Our composite electrodes exhibit an anodic activity that compares favourably with the only literature result available at the time of this writing for Dy 2 O 3 and an even better cathodic performance.

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Redox Property–Local Structure Relationships in the Rh-Loaded CeO2–ZrO2Mixed Oxides

Cited by 182 publications

References 28 publications

Toxicity and Protective Effects of Cerium Oxide Nanoparticles (Nanoceria) Depending on Their Preparation Method, Particle Size, Cell Type, and Exposure Route

Toxicity and Protective Effects of Cerium Oxide Nanoparticles (Nanoceria) Depending on Their Preparation Method, Particle Size, Cell Type, and Exposure Route

Understanding of Enhanced Oxygen Storage Capacity in Ce_0.5Zr_0.5O₂: The Presence of an Anharmonic Pair Distribution Function in the Zr−O₂ Subshell as Analyzed by XAFS Spectroscopy

Electrodeposition of a Au-Dy2O3 Composite Solid Oxide Fuel Cell Catalyst from Eutectic Urea/Choline Chloride Ionic Liquid

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Redox Property–Local Structure Relationships in the Rh-Loaded CeO2–ZrO2Mixed Oxides

Cited by 182 publications

References 28 publications

Toxicity and Protective Effects of Cerium Oxide Nanoparticles (Nanoceria) Depending on Their Preparation Method, Particle Size, Cell Type, and Exposure Route

Toxicity and Protective Effects of Cerium Oxide Nanoparticles (Nanoceria) Depending on Their Preparation Method, Particle Size, Cell Type, and Exposure Route

Understanding of Enhanced Oxygen Storage Capacity in Ce0.5Zr0.5O2: The Presence of an Anharmonic Pair Distribution Function in the Zr−O2 Subshell as Analyzed by XAFS Spectroscopy

Electrodeposition of a Au-Dy2O3 Composite Solid Oxide Fuel Cell Catalyst from Eutectic Urea/Choline Chloride Ionic Liquid

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Understanding of Enhanced Oxygen Storage Capacity in Ce_0.5Zr_0.5O₂: The Presence of an Anharmonic Pair Distribution Function in the Zr−O₂ Subshell as Analyzed by XAFS Spectroscopy