High Surface Area Cerium Oxide

Fink, C. R.; Hagemeyer, Alfred; Hogan, Zach; Volpe, Anthony F.; Yoder, J. A.

doi:10.2174/2211544705666160509161559

Cited by 4 publications

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“…50180 m 2 •g ¹1 ). 8,22) It is assumed that the CeO 2 prepared from the amorphous alloy is advantageous in surface area. No significant difference in pore diameter was observed among the various prepared samples.…”

Section: Resultsmentioning

confidence: 99%

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Preparation of Nanoporous CeO2 Catalyst Supports by Chemical Treatment of Amorphous Alloys and Investigation of Ni/CeO2 Catalytic Activity

et al. 2019

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Nanoporous CeO 2 was prepared implementing the dealloying method on precursors consisting of CeAl alloys characterized by different atomic arrangements. In fact, the atomic arrangement of the precursor alloy strongly influence the surface area of CeO 2 in the final product. Nanoporous CeO 2 with quite high surface area were formed when an amorphous CeAl alloy was used as the precursor. The catalytic performance of the catalyst that Ni was supported on CeO 2 prepared from amorphous alloy were evaluated based on the reaction whereby molecular hydrogen is released from ammonia borane. A high level of catalytic activity was observed due to that fine Ni particles were dispersed on CeO 2 prepared from amorphous alloy with quite high surface area.

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Section: Resultsmentioning

confidence: 99%

“…In addition, it was found that the CeO 2 prepared from amorphous alloy in this study has a much higher surface area than the CeO 2 prepared by a general preparation method such as hydrothermal synthesis method and dry decomposition methods. 8,22) 2. Experimental Procedure…”

Section: Introductionmentioning

confidence: 99%

Preparation of Nanoporous CeO2 Catalyst Supports by Chemical Treatment of Amorphous Alloys and Investigation of Ni/CeO2 Catalytic Activity

et al. 2019

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“…Oxy-and amino acid-aided routes are widely used for the synthesis of electrode materials [3,11] and have already been implemented on a small to medium-sized level [13,14]. The essence of the citric acid aided route lies in the pyrolysis of acidic metal citrates, which is strongly exothermal, involves the loss of a great amount of gaseous reaction products, and leads to oxides or their mixtures in the nanosized form.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of LiMn2O4 for high-rate applications by means of citric acid aided route and microwave heating

Shmatok,

Potapenko,

Kirillov

2024

J. Electrochem. Sci. Eng.

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Due to shortening the duration of the process and possibility to obtain crystals of smaller and uniform size, microwave heating is considered an effective and promising tool for the synthesis of LiMn2O4, a valuable cathode material for lithium-ion batteries. However, electrochemical characteristics of LiMn2O4 obtained with its help are almost completely absent and do not allow for drawing a sound conclusion regarding advantages and drawbacks of microwave processing. Here we present a description of the microwave-assisted citric acid aided synthesis, characterization and electrochemical performance of LiMn2O4. The disclosure of detailed working protocols enabling one to manufacture samples tolerant to extremely high currents is the main novelty of this paper. Specifically, our material sustains current loads up to 40 C (5920 mA g-1) and completely recovers after cycling at harsh conditions.

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“…Breysse et al 5) and Mendelovici et al 6) revealed that using CeO 2 as a catalyst support led to the excellent catalytic activity in CO oxidation 5) and ethylene oxidation reactions, 6) respectively. Fink et al 7) and Masui et al 8) prepared fine CeO 2 particles with high surface area from precipitation 7) and hydrothermal 8) synthesis. Recently, Ishikawa 9) clarified that CeO 2 prepared from a crystalline alloy by the dealloying method was advantageous in high surface area.…”

Section: Introductionmentioning

confidence: 99%

Pd-Dispersed CeO2 Catalyst Prepared from Dealloying the Pd–Ce–Al Ternary Amorphous Alloy Used for Oxidation Reaction

et al. 2020

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The relationship between preparation method and the catalytic activity as well as reusability for PdCeO 2 catalyst was investigated. Pddispersed CeO 2 prepared from dealloying in NaOH aqueous solution of a PdCeAl ternary amorphous alloy as a precursor. The dealloying proceeded by active dissolution of Al and Ce to form sodium aluminate ion, Na[Al(OH 4)](aq), and CeO 2 particles, respectively. At the same time, Pd acting as cathode resulted in directly to be metallic nailed-particles exposing partly from the matrices of the CeO 2 particles. Its catalytic activity and reusability as a function of its surface area of exposed-Pd as well as sample surface area were investigated, compared with those of Pd-supported CeO 2 which was prepared by conventional liquid phase reduction. Pd-dispersed CeO 2 was higher in exposed Pd surface area than Pd-supported CeO 2 despite its lower sample surface area. It is likely that the nailed Pd on the CeO 2 prevents themselves from aggregation during sample preparation and reusability study. As a result, in the oxidation reaction of methyl benzyl alcohol, Pd-dispersed CeO 2 showed higher catalytic activity and reusability than Pd-supported CeO 2. The oxidation reaction of methyl benzyl alcohol is a measure of the oxidative decomposition reaction of harmful substances. Pd-dispersed CeO 2 is expected to be widely used for the oxidative decomposition reaction of harmful substances.

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High Surface Area Cerium Oxide

Cited by 4 publications

References 0 publications

Preparation of Nanoporous CeO<sub>2</sub> Catalyst Supports by Chemical Treatment of Amorphous Alloys and Investigation of Ni/CeO<sub>2</sub> Catalytic Activity

Preparation of Nanoporous CeO<sub>2</sub> Catalyst Supports by Chemical Treatment of Amorphous Alloys and Investigation of Ni/CeO<sub>2</sub> Catalytic Activity

Optimal design of LiMn2O4 for high-rate applications by means of citric acid aided route and microwave heating

Pd-Dispersed CeO<sub>2</sub> Catalyst Prepared from Dealloying the Pd–Ce–Al Ternary Amorphous Alloy Used for Oxidation Reaction

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