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544841

Sigma-Aldrich

Cerium(IV) oxide

greener alternative

nanopowder, <25 nm particle size (BET)

Synonym(s):

Ceric oxide, Ceric oxide, ceria

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About This Item

Linear Formula:
CeO2
CAS Number:
1306-38-3
Molecular Weight:
172.11
EC Number:
215-150-4
MDL number:
MFCD00010933
UNSPSC Code:
26111700
PubChem Substance ID:
24878788
NACRES:
NA.23
Pricing and availability is not currently available.

form

nanopowder

Quality Level

100

reaction suitability

reagent type: catalyst
core: cerium

greener alternative product characteristics

Design for Energy Efficiency
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sustainability

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particle size

<25 nm (BET)

density

7.13 g/mL at 25 °C (lit.)

application(s)

battery manufacturing

greener alternative category

Enabling

SMILES string

O=[Ce]=O

InChI

1S/Ce.2O

InChI key

CETPSERCERDGAM-UHFFFAOYSA-N

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General description

Cerium(IV)oxide (CeO₂), also known as ceric oxide, ceria, or cerium dioxide, is an oxide of the rare-earth metal cerium. It appears as a white to yellow nanopowder with a particle size of less than 25 nm (BET), exhibiting high surface area and reactivity. It is used in various applications, including catalysis, electrochemical applications, and in glass and ceramics. CeO₂ is widely employed in catalytic converters for automotive applications, where it aids in the reduction of harmful emissions. Additionally, it is used in the production of advanced ceramics, glass polishing, and as a catalyst in various chemical reactions. Its unique properties also make it valuable in solid oxide fuel cells and as a UV filter in sunscreens.[1]

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product is intended for Molecular Solar Thermal Energy Storage Systems (MOST) and has been enhanced for energy efficiency. Click here for more information.

Application

CeO2nanopowder is utilized in solid oxide fuel cells (SOFCs) due to its ionicconductivity and stability at high temperatures. It is also used in batteriesand supercapacitors to improve performance. Additionally, CeO2 is used as a polishing powder in the glass andsemiconductor industries. Its fine particle size and hardness make it effectivefor achieving high surface finishes on optical components.
The additon of CeO2 to CuO/TiO2 increases specific surface area and inhibits sintering and pore size growth at high temperatures.

Legal Information

Product of Engi-Mat Co.

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCX3316
MKCW3131
MKCW8511
MKCT6483
MKCV1880

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Vishal Shah et al.
PloS one, 7(10), e47827-e47827 (2012-10-31)
Cerium oxide nanoparticles have found numerous applications in the biomedical industry due to their strong antioxidant properties. In the current study, we report the influence of nine different physical and chemical parameters: pH, aeration and, concentrations of MgSO(4), CaCl(2), KCl
Cecilia Mondelli et al.
Chimia, 66(9), 694-698 (2012-12-06)
The heterogeneously catalyzed gas-phase oxidation of HCl to Cl(2) offers an energy-efficient and eco- friendly route to recover chlorine from HCl-containing byproduct streams in the chemical industry. This process has attracted renewed interest in the last decade due to an
Xiangyan Zhou et al.
Journal of nanoscience and nanotechnology, 13(1), 204-215 (2013-05-08)
The cerium oxide nanoparticles (NPs) have been widely used in the fields of fuel additives, cosmetics, commodities, pharmaceuticals and other industries. Exposure of the CeO2 NPs causes a public concern on their potential health risk. In this study, the interactions
Dengsong Zhang et al.
Nanoscale, 5(3), 1127-1136 (2013-01-04)
The MnO(x) and CeO(x) were in situ supported on carbon nanotubes (CNTs) by a poly(sodium 4-styrenesulfonate) assisted reflux route for the low-temperature selective catalytic reduction (SCR) of NO with NH(3). X-Ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM)
Gao Li et al.
Chemical communications (Cambridge, England), 48(98), 12005-12007 (2012-11-07)
The Au(25)(SR)(18)/CeO(2) nanocluster catalyst showed high activity in the homocoupling of aryl iodides (e.g. up to 99.8% yield with iodobenzene) and excellent recyclability.
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Questions

1–3 of 3 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  3. 酸化セリウムnanopowder（544841）を水に分散させると、透明な黄緑色の均一な分散液になりますでしょうか？

    1 answer

    1. This product is available as a 10% dispersion in water under product number 643009. The appearance is an off-white liquid. The clarity is not a specification. However, this material is insoluble in water and is not expected to be a clear solution. Note that product 289744 is an unrelated dispersion of Cerium (IV) oxide in acidified water. The appearance of this item is listed as a yellow-orange liquid. Please see the links below to review a sample or lot-specific Certificate of Analysis for each item.

      643009
      https://www.sigmaaldrich.com/product/aldrich/643009#product-documentation

      289744
      https://www.sigmaaldrich.com/product/aldrich/289744#product-documentation

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