Synthesis and application of rare-earth elements (Gd, Sm, and Nd) doped ceria-based solid solutions for methyl mercaptan catalytic decomposition

He, Dedong; Hao, Husheng; Chen, Dingkai; Liu, Jiangping; Yu, Jianguo; Lu, Jichang; Liu, Feng; Wan, Gengping; He, Shan; Luo, Yongming

doi:10.1016/j.cattod.2016.06.022

Cited by 107 publications

(41 citation statements)

References 37 publications

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“…Finally we will calculate the magnetization M of a Sm doped CeO 2 NP. The radius of the doping ion Sm 3+ (1.17 Å) is larger compared to that of Ce 4+ (0.97 Å) and leads to increasing of the lattice what is in qualitative agreement with the experimental data of many authors . The grain size decreases with increasing Sm concentration .…”

Section: Numerical Results and Discussionsupporting

confidence: 89%

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Magnetic Properties of Rare Earth Doped SnO₂, TiO₂ and CeO₂ Nanoparticles

Apostolov

Apostolova

Wesselinowa

2018

Physica Status Solidi (b)

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The magnetic properties of rare earth doped SnO 2 , TiO 2 , and CeO 2 nanoparticles are studied theoretically. The discrepancies in the literature for some doping cases are explained, for example, the lattice parameters and the magnetization in Pr and Sm doped CeO 2 nanoparticles. There is a strong connection between the lattice deformations and the magnetization M. M decreases (except for Y doped CeO 2 ) due to the larger radius of the rare earth ions compared to that of the host ions which leads to increase of the lattice parameters and decrease of the exchange interactions. The decrease of M is due also to the enhanced number of oxygen vacancies with increasing dopant concentration. For Y doping the lattice parameters decrease and M increases with increasing Y concentration. We have discussed the origin of the different behavior of M in rare earth doped nanoparticles.

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Section: Numerical Results and Discussionsupporting

confidence: 89%

“…Swatsitang et al reported a maximum in the lattice parameter values and in the magnetization M at small Sm concentration,

x = 0.1

. The cited above experimental data are for

0 \leq x \leq

0.2–0.25. We have calculated also M in Sm doped SnO 2 and TiO 2 NPs taking the lattice parameter values from Ref.…”

Section: Numerical Results and Discussionmentioning

confidence: 84%

Magnetic Properties of Rare Earth Doped SnO₂, TiO₂ and CeO₂ Nanoparticles

Apostolov

Apostolova

Wesselinowa

2018

Physica Status Solidi (b)

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“…This is one of the reasons for the best catalytic activity of Sm. He et al [46] also proposed that Sm can promote the increase in oxygen vacancies, thereby increasing the catalytic activity.…”

Section: The Homogeneous Reaction Of Co 2 /C 2 H 6 In the Absence Of mentioning

confidence: 99%

Selective catalytic and kinetic studies on oxydehydrogenation of ethane with CO2 over lanthanide metal catalysts

Wang¹,

Wang²,

Yang³

et al. 2020

Comptes Rendus. Chimie

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Single metal catalysts with different active components (La, Sm, Ce) and La loadings (5%, 10%, 15%) were prepared. Oxydehydrogenation of C 2 H 6 with CO 2 over the above catalysts was studied by catalyst activity experiments and characterization tests. The results indicate that the homogeneous reaction of CO 2 /C 2 H 6 is the coupling of ethane pyrolysis and hydrogenolysis. Dehydrogenation has better selectivity than reforming on La/Sm/Ce-based catalysts; Sm exhibits the best catalytic activity due to carbon deposition resistance and many oxygen vacancies. C 2 H 6 conversion on 10% Sm/SiO 2 is 42.75% at 700°C, but C 2 H 4 selectivity is lowest. Because of the existence of Ce 4+ , Ce has the best C 2 H 4 selectivity; it has potential to modify the catalyst, but its catalytic activity is lowest. La shows the best catalytic performance. The activation energy on 10% La/SiO 2 is 83.99 kJ/mol, C 2 H 4 selectivity is 96.84% at 700°C, and its optimum loading is between 10% and 15%.

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“…In fact oxide of rare earth elements have been widely used as structural or electronic promoters to improve the activity, selectivity and thermal stability of CeO 2 through the formation of solid solution [26][27]29]. When doping with lanthanide cations an increase in the concentration of oxygen vacancies in the ceria structure is expected.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Rh/MnO 2 -CeO 2 /Al 2 O 3 catalysts for CO-PrOx reaction

Laguna

López-Cartés

2017

Molecular Catalysis

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Rh/MnO 2 -CeO 2 /Al 2 O 3 catalysts with different manganese-to-ceria ratios have been synthesized, characterized and tested in CO-PrOx reaction. The physicochemical properties of the solids were studied by XRD, Raman spectroscopy, BET surface area, H 2 -TPR, TGA-DTG and TEM. The differences observed in the textural, structural and redox properties were related to the Mn-toceria ratio of the samples. The segregation of Mn species was observed at high Mn-to-Ce ratios.In opposite way, MnO 2 -CeO 2 solid solutions were obtained at low Mn to Ce ones. In this last case, the physicochemical properties of the solids were favored by the intimate Rh-Ce-Mn contact. The effect of the Mn-Ce presence on Rh catalysts which promotes the catalytic behavior towards selective CO oxidation was observed to be better at low temperatures. At higher temperatures, Mn species promote the Reverse Water Gas Shift reaction, whilst ceria promotes the H 2 oxidation in the whole range of working temperatures.

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Synthesis and application of rare-earth elements (Gd, Sm, and Nd) doped ceria-based solid solutions for methyl mercaptan catalytic decomposition

Cited by 107 publications

References 37 publications

Magnetic Properties of Rare Earth Doped SnO₂, TiO₂ and CeO₂ Nanoparticles

Magnetic Properties of Rare Earth Doped SnO₂, TiO₂ and CeO₂ Nanoparticles

Selective catalytic and kinetic studies on oxydehydrogenation of ethane with CO2 over lanthanide metal catalysts

Synthesis and characterization of Rh/MnO 2 -CeO 2 /Al 2 O 3 catalysts for CO-PrOx reaction

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Synthesis and application of rare-earth elements (Gd, Sm, and Nd) doped ceria-based solid solutions for methyl mercaptan catalytic decomposition

Cited by 107 publications

References 37 publications

Magnetic Properties of Rare Earth Doped SnO2, TiO2 and CeO2 Nanoparticles

Magnetic Properties of Rare Earth Doped SnO2, TiO2 and CeO2 Nanoparticles

Selective catalytic and kinetic studies on oxydehydrogenation of ethane with CO2 over lanthanide metal catalysts

Synthesis and characterization of Rh/MnO 2 -CeO 2 /Al 2 O 3 catalysts for CO-PrOx reaction

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Product

Resources

About

Magnetic Properties of Rare Earth Doped SnO₂, TiO₂ and CeO₂ Nanoparticles

Magnetic Properties of Rare Earth Doped SnO₂, TiO₂ and CeO₂ Nanoparticles