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Suda, Akihiko; Kandori, Toshio; Terao, N.; Ukyo, Yoshio; Sobukawa, Hideo; Sugiura, Masaaki

doi:10.1023/a:1006514329090

Cited by 37 publications

(32 citation statements)

References 5 publications

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“…temperature lower than 200 C. The result that the amount of Pt loading influences both the storage and release processes indicates that oxygen or hydrogen goes through the Pt parti cles in the oxygen storage or release process. However, the storage process without Pt loading also has a considerable rate at 500 C, 11) indicating that the storage process has an oxida tion route even without Pt. The temperature dependence of the storage rate is stronger than that of the release rate.…”

Section: Temperatureprogrammed Reductionmentioning

confidence: 99%

Effect of the Amount of Pt Loading on the Oxygen Storage Capacity of Ceria-Zirconia Solid Solution

Suda

Yamamura

Sobukawa

et al. 2004

J. Ceram. Soc. Japan

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à/ZAWRjAÅnÌÌ_f \ÉyÚ·àSÊÌe¿ {c¾FERºÀbE]zìpvEEÇYEcÓ«ME·äNME òEY³( )Lc¤G}¤ºC4801192 ¤m §·vè¬As an important oxygen storage material, ceriazirconia solid solution is widely used in automotive threeway catalysts. For the CeZr solid solution being usually used with a noble metal, the evaluation of oxygen storage capacity (OSC) should be conducted with the CeZr solid solution loaded with a noble metal. The measured OSC of noblemetalloaded CeZr solid solution consists of two parts: the stored oxygen within the solid solu tion itself and the adsorbed oxygen on the loaded noble metal particles. Therefore, it is very necessary to clarify the influence of metal loading on the measured OSC in order to ascertain the exact OSC of the solid solution it self. In this research, the authors attempted to clarify the above issues by characterizing the OSC performance of CeZr solid solutions with platinum (Pt) loading from 0.000110 mass÷. We found that increasing the amount of Pt loading increases the oxygen storage and release rates and that increasing the temperature also increases the oxygen storage rate, although the oxygen release rate is not affected by increasing the temperature. The apparent OSC reached saturation over a certain amount of Pt loading and temperature. The saturated OSC increased with increasing temperature.

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Section: Temperatureprogrammed Reductionmentioning

confidence: 99%

Effect of the Amount of Pt Loading on the Oxygen Storage Capacity of Ceria-Zirconia Solid Solution

Suda

Yamamura

Sobukawa

et al. 2004

J. Ceram. Soc. Japan

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“…Therefore, almost all zirconia solid solutions doped with stabilizing agents (e.g., MgO (27,28), CaO (27), Y O (27}29), and CeO (30,31)) were conducted at high pH range under hydrothermal conditions. There are a few reports on the formation of ceria}zirconia solid solution particles rich in CeO , only that by emulsion combustion (32) and mechanical milling (33,34). In our previous work (35) on the hydrothermal synthesis at high pH range over the wide concentration in the CeO }ZrO system, single-phase solid solution particles could not be obtained at the composition rich in ceria.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Direct Synthesis of Nanoparticles of Fluorite-Type Ceria–Zirconia Solid Solutions by “Forced Cohydrolysis” at 100°C

Hirano

Miwa

Inagaki

2001

Journal of Solid State Chemistry

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“…It has been reported that the oxygen storage capacity (OSC) is generated by interconversion between Ce 4+ and Ce 3+ under oxidative and reductive conditions [5,6]. The OSC of the CeO 2 -ZrO 2 solid solution depends largely on the method of preparation; many physical properties such as crystallinity, crystallite and particle sizes, and homogeneity change depending upon its preparation methods and, thus, influence the OSC [7], and many methods such as solid-state reaction [8], high-energy milling [9], coprecipitation method [10,11], sol-gel method [12,13], citrate complex method [14], polymerized complex method [15], combustion synthesis [16,17], and hydrothermal method [18,19] have been reported.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of CeO2–ZrO2 solid solution by glycothermal method and its oxygen release capacity

Hosokawa

Imamura

Iwamoto

et al. 2011

Journal of the European Ceramic Society

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The glycothermal (GT) reaction of Ce acetate and Zr alkoxide directly yielded CeO2-ZrO2 solid solutions in a region of low Ce content ≤40 mol%. Of the CeO2-ZrO2 solid solutions obtained by the GT method and subsequent calcination at 500 or 800 ºC, the sample with 20 mol% Ce content had the largest BET surface area. This sample exhibited the highest Ce-based oxygen release capacity in the whole Ce/Zr composition range.The oxygen release capacities of CeO 2 -ZrO 2 solid solutions synthesized by the GT method were much larger than those of the samples prepared by a coprecipitation (CP) method. The Rietvelt analysis and the repetitive reduction-oxidation experiment indicated that the CeO 2 -ZrO 2 solid solution synthesized by the GT method has a homogeneous structure as compared with that prepared by the CP method.2

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Cited by 37 publications

References 5 publications

Effect of the Amount of Pt Loading on the Oxygen Storage Capacity of Ceria-Zirconia Solid Solution

Effect of the Amount of Pt Loading on the Oxygen Storage Capacity of Ceria-Zirconia Solid Solution

Low-Temperature Direct Synthesis of Nanoparticles of Fluorite-Type Ceria–Zirconia Solid Solutions by “Forced Cohydrolysis” at 100°C

Synthesis of CeO2–ZrO2 solid solution by glycothermal method and its oxygen release capacity

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