Synthesis of mesoporous ceria-based nanopowders for functional materials application

Zagaynov, Igor V.; Vorobiev, A.V.; Kutsev, S. V.

doi:10.1016/j.matlet.2014.10.096

Cited by 10 publications

(2 citation statements)

References 23 publications

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“…Unfortunately, for Cu-Mn-Zr-Ce-O solid solution cell parameter is not correlated with any equation, so the contribution of surface lattice relaxations to the variations of the lattice parameters cannot be excluded. The lattice parameter of sample 6 is higher than pure ceria (sample 0, [10]), because in according to a full height approximation of the spectrum the copper oxides can be probably found in the form of amorphous state, but is less than bulk ceria lattice parameter in eq. 2 (5.413 Å).…”

Section: Resultsmentioning

confidence: 93%

Investigation of structure and morphology of Cu-Mn-Zr-Ce-O solid solutions

Zagaynov¹,

Коновалов²,

Koneva³

2018

LoM

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Materials based on ceria are of interest due to the fact that they have a large oxygen storage capacity and high mobility of oxygen, which can offer high catalytic activity and electrical conductivity. It is well known that the copper or manganese doping of ceria leads to a synergistic effect -a decrease in temperature of the catalytic reaction and the activation energy, but, unfortunately, the solid solutions Cu-Mn-(Zr)-Ce-O could not be presented earlier. So, a series of Cu-Mn-Zr-Ce-O solid solutions was synthesized by co-precipitation method with sonication. The crystallite size of all samples is about 7 -9 nm, and does not depend on the Cu / Mn ratio. The variation in the lattice parameter corresponds to the Vegard's law and can be described by the semiempirical equation for ceria based solid solutions: Cu-Mn-Ce-O is clear correlated to the equation, but Cu-Mn-Zr-Ce-O is not. Pore size distributions in the range of 2 -25 nm for Cu-Mn-Ce-O systems and 2 -40 nm for Cu-Mn-Zr-Ce-O systems were observed. Thereby the preparing of homogeneous solid solutions gives the better textural property, thermal stability, catalytic and other properties as compared to domain-or phase-segregated nonhomogeneous ones. Therefore, this method allowed creating such homogeneous solid solutions, giving the better properties for their application. These systems can be applied in catalysis as a support or in IT-SOFC as an electrolyte.

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Section: Resultsmentioning

confidence: 93%

Investigation of structure and morphology of Cu-Mn-Zr-Ce-O solid solutions

Zagaynov¹,

Коновалов²,

Koneva³

2018

LoM

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“…It was found that, the conguration of the metal oxide played a critical role in the electronic structure 16,25,26 and the synergistic interaction between the metal oxide and Pt. 4,27 Therefore, it is useful to explore the novel morphology of CeO 2 as a cocatalyst in methanol electrooxidation.…”

Section: Introductionmentioning

confidence: 99%

Superior methanol electrooxidation activity and CO tolerance of mesoporous helical nanospindle-like CeO₂modified Pt/C

Chen

et al. 2015

RSC Adv.

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In an attempt to enhance the electrocatalytic activity and CO tolerance of ceria modified Pt/C electrodes, a novel structured ceria material has been developed. Left-handed helical CeO 2 nano-spindles with mesoporous structures were successfully synthesized through a template-free based precursor method on a large scale. By a microwave-assisted polyol synthesis process, the ceria modified Pt/C electrocatalysts were synthesized. The helical CeO 2 nanospindle based electrode Pt@Heli-CeO 2 /C exhibits superior electrochemically active surface areas, and significantly enhanced methanol oxidation catalytic activity and CO antipoisoning activity, compared to Pt/C and a nano-octahedral CeO 2 modified electrode Pt@Octa-CeO 2 /C. The experimental results show that Pt@Heli-CeO 2 /C possesses 8.2 times and 3.2 times higher activity for methanol electrooxidation than Pt/C and Pt@Octa-CeO 2 /C, respectively.This remarkable enhancement could be attributed to the reasons as follows: compared to octahedral CeO 2 , the unique helical CeO 2 is more conductive with better electron transfer and can provide more active surface sites to strengthen the support-metal interactions based on an electronic transfer mechanism from CeO 2 to Pt, thus helical CeO 2 can promote better dispersion of the Pt (0) nanocrystallites and a high concentration of metallic Pt(0) in the composition. ; Tel: +86 10 82317103 † Electronic supplementary information (ESI) available: TG result of CeO 2 -Heli-P; H 2 -TPR and N 2 adsorption-desorption isotherm results of the obtained ceria. See

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A general method to produce mesoporous oxide spherical particles through an aerosol method from aqueous solutions

Zelcer

Franceschini

Lombardo

et al. 2019

J Sol-Gel Sci Technol

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Synthesis of mesoporous ceria-based nanopowders for functional materials application

Cited by 10 publications

References 23 publications

Investigation of structure and morphology of Cu-Mn-Zr-Ce-O solid solutions

Investigation of structure and morphology of Cu-Mn-Zr-Ce-O solid solutions

Superior methanol electrooxidation activity and CO tolerance of mesoporous helical nanospindle-like CeO₂modified Pt/C

A general method to produce mesoporous oxide spherical particles through an aerosol method from aqueous solutions

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Synthesis of mesoporous ceria-based nanopowders for functional materials application

Cited by 10 publications

References 23 publications

Investigation of structure and morphology of Cu-Mn-Zr-Ce-O solid solutions

Investigation of structure and morphology of Cu-Mn-Zr-Ce-O solid solutions

Superior methanol electrooxidation activity and CO tolerance of mesoporous helical nanospindle-like CeO2modified Pt/C

A general method to produce mesoporous oxide spherical particles through an aerosol method from aqueous solutions

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Superior methanol electrooxidation activity and CO tolerance of mesoporous helical nanospindle-like CeO₂modified Pt/C