Compounds of cerium, titanium and oxygen

Bamberger, C.E.; Haverlock, Tamara J.; Shoup, Shara S.; Kopp, Otto C.; Stump, Nathan A.

doi:10.1016/0925-8388(94)90078-7

Cited by 27 publications

(16 citation statements)

References 11 publications

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“…The results they obtained agree well with the solubility of Ce 2 Ti 2 O 7 in the same cubic pyrochlore hosts [25]. As Pu is not easily studied experimentally, and Pu and Ce share many common chemical and crystallochemical properties, Ce has often been used as a nonradioactive surrogate for Pu [18,[26][27][28][29][30].…”

Section: A N U S C R I P Tsupporting

confidence: 75%

The solubility of cerium in La2Ti2O7 by DFT + U calculations

Liu

Yang

Chen

et al. 2015

Journal of Alloys and Compounds

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Section: A N U S C R I P Tsupporting

confidence: 75%

The solubility of cerium in La2Ti2O7 by DFT + U calculations

Liu

Yang

Chen

et al. 2015

Journal of Alloys and Compounds

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“…Another series of perovskite-type solid solutions conates do not all exhibit the same crystal structure. From studied is that of Sr 6-12x Ce 6x Ti 5 O 16 (0.08 Յ x Յ 0.43), lanthanum to gadolinium, they adopt a cubic pyrochlore-where cerium is tetravalent (9). There are also a few known type structure (2).…”

Section: Introductionmentioning

confidence: 98%

“…The first step in establishing the possible utility of these types of compounds and solid solutions as possible waste It was noted that the point at which no more changes were detected was harder to achieve in the mixed titaniumhosts for actinides is to define the existence and the limits of solid solution. Since, based on the corresponding ionic zirconium systems than in the titanium-only systems (4,5,8,9). radii and electronic structures, it is accepted that lanthanide elements can be used as surrogates for actinides, Resultant compounds and solid solutions were identified and characterized by XRD.…”

Section: Introductionmentioning

confidence: 99%

Lanthanide-Containing Zirconotitanate Solid Solutions

Shoup

Bamberger

Tyree

et al. 1996

Journal of Solid State Chemistry

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“…Previous studies 34,36 have shown the cerium solubility limit in SrTiO 3 to be related to the defect compensation mechanism which is highly dependent on the processing atmosphere. Under oxidizing conditions the donor is compensated by strontium vacancies, which corresponds to the general formula Sr 1-1.5x Ce x TiO 3±δ .…”

Section: Resultsmentioning

confidence: 99%

Nickel Impregnated Cerium-Doped Strontium Titanate Fuel Electrode: Direct Carbon Dioxide Electrolysis and Co-Electrolysis

Cumming

Thompson

Rothman

2016

J. Electrochem. Soc.

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Direct electrolysis of carbon dioxide and co-electrolysis of steam and carbon dioxide offers an efficient and effective method to produce CO or syngas and also utilizes CO 2 in a carbon-neutral fuel cycle. Here we report the use of composite fuel electrode containing a Sr 0.7 Ce 0.2 TiO 3±δ (SCT) and Sm 0.20 Ce 0.80 O 2-δ (SDC) backbone which has been infiltrated with nickel nitrate and decomposed to form nickel surface decoration on the ceramic scaffold. Maximum cell current during electrolysis at 850 • C was 263 mAcm −2 and 192 mAcm −2 at 1.8V for co-electrolysis and CO 2 , respectively. The infiltrated nickel particles provided a large surface area and enhanced activity during electrolysis. Fossil-based fuels remain the key component in the global energy mix. Their continued use leads to carbon dioxide emissions which contributes to climate change. To mitigate emissions, renewable energy sources (wind, solar and tidal, biomass etc.) have seen increased popularity. One of the key challenges facing the uptake of renewable electrical generation technologies is a way to store the intermittent electricity these tend to generate. Another complicating factor is the role fossil fuels play in transportation where alternatives such as hydrogen are limited by infrastructure and viable carbonfree hydrogen generation technology. Both of these issues can be addressed by producing liquid hydrocarbon fuel from renewable or excess grid electricity.1 High temperature electrolysis of steam and carbon dioxide has been shown an efficient and scalable route to producing syngas which will readily convert to a versatile range of downstream hydrocarbons.2-6 Use of a state-of-the-art solid oxide electrolysis cell with nickel-YSZ composite electrode for CO/CO 2 has also been demonstrated as a means of directly utilizing and recycling captured carbon dioxide rather than capture and storage. However, using traditional nickel-based composite electrodes showed relatively high levels of passivation due to sulfur impurities in the gas feed streams. 7The need for a robust alternative to nickel-composite electrode materials has been widely documented for solid oxide fuel cells. ). Typically these materials are prepared with a small degree of cation non-stoichiometry to maintain a single phase during synthesis. In the case of La-doped STO it has been found experimentally that oxygen excess can be accommodated by the formation of layered intergrowths rich in La. 22 Nb, Y and Ce doped materials do not seem to support intergrowth structures and tend to precipitate second phases if the stoichiometry, defect regime and processing conditions are not coordinated.Electrochemical cell performance has been reported for Y, La and Nb-doped titanate materials 23,24 with encouraging testing results, however, many of the titanate materials show negligible catalytic activity. 25Significant performance improvements have been shown in electrodes based on a titanate backbone where the microstructure has been decorated with metal nanoparticles. 25,26 Typically the...

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Compounds of cerium, titanium and oxygen

Cited by 27 publications

References 11 publications

The solubility of cerium in La2Ti2O7 by DFT + U calculations

The solubility of cerium in La2Ti2O7 by DFT + U calculations

Lanthanide-Containing Zirconotitanate Solid Solutions

Nickel Impregnated Cerium-Doped Strontium Titanate Fuel Electrode: Direct Carbon Dioxide Electrolysis and Co-Electrolysis

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