Fabrication of surface oxygen vacancies on NiMnAl-LDO catalyst by high-shear mixer-assisted preparation for low-temperature CO2 methanation

Zeng, Junming; Zhang, Jie; Chang, Zhouxin; Yang, Jun; Liu, Jichang; Li, Jiangbing; Ye, Feng

doi:10.1016/j.fuel.2021.122099

Cited by 16 publications

(5 citation statements)

References 75 publications

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“…Only in the case of Al−O components the area is slightly higher than the stoichiometry value, indicating the possible superposition of other oxygen species in the sample. This is in agreement previous experiments [93,94] on other mixed compound catalysts. In previous works, the mobile oxygen vacancies were defined as the ones appearing at binding energies above 531.5 eV and bound with carbonate in 10 %Co/MA and 3 %La–10 %Co/MA catalysts.…”

Section: Resultssupporting

confidence: 94%

Enhancing Catalytic Performance with Sol‐Gel Hydrotalcite‐Derived Nickel Oxide Catalysts for Dry Reforming of Methane: An Examination on Reactivity and Coke Formation

Gonzalez Caranton,

Stavale,

Annese

et al. 2023

ChemCatChem

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Hydrotalcite‐based materials are preferred as catalysts due to their versatility and easiness of their synthesis. This work studies supported nickel catalysts made from hydrotalcites through sol‐gel synthesis, Ni‐EDTA impregnation, and coprecipitation. The synthetized hydrotalcites present nanocapsular morphology and dispersed nickel nano‐oxide particles after calcination at 500 °C. The catalysts were evaluated at 600 °C and 800 °C for 8 hours and demonstrated high conversions and varying yields, with sol‐gel oxide catalysts (SgOxMix) showing the best performance with the highest reactivity and controlled coke formation at 800 °C after 14 hours of testing. The mixed oxide morphology promotes electronic effects and inhibits carbon encapsulation of metallic particles. Principal component analysis was performed to explain fluctuations in the reaction pathway.

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Section: Resultssupporting

confidence: 94%

Enhancing Catalytic Performance with Sol‐Gel Hydrotalcite‐Derived Nickel Oxide Catalysts for Dry Reforming of Methane: An Examination on Reactivity and Coke Formation

Gonzalez Caranton,

Stavale,

Annese

et al. 2023

ChemCatChem

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“…Encouraged by previous study, more electrons around Ni promoted CO 2 species to combine with dissociated H to generate formate intermediate and thus facilitated methane formation . The shift to a lower binding energy of the Si 2p XPS peak in Figure e for doped catalysts meant the electrons surrounding Si were increased, implying the tight interaction between metallic Ni and support silica. − The binding energy at 528–534 eV of O 1s in Figure f could be segmented into two peaks referring to lattice oxygen (O lat ) and defect oxygen (O def ). , The peak area ( A ) of different oxygen species was a significant reference to evaluate relative contents of surface oxygen vacancy ( C Odef ) based on the formula C Odef = A Odef /( A Odef + A Olat ) . The results were 37.1% for 10Ni/SiO 2 , 45.1% for 10Ni-3Zr/SiO 2 , 46.5% for 10Ni-3Ce/SiO 2 , and 49.8% for 10Ni-3La/SiO 2 .…”

Section: Results and Discussionmentioning

confidence: 85%

“…45−47 The binding energy at 528−534 eV of O 1s in Figure 4f could be segmented into two peaks referring to lattice oxygen (O lat ) and defect oxygen (O def ). 48,49 The peak area (A) of different oxygen species was a significant reference to evaluate relative contents of surface oxygen vacancy (C Odef ) based on the formula C Odef = A Odef /(A Odef + A Olat ). 50 The results were 37.1% for 10Ni/SiO 2 , 45.1% for 10Ni-3Zr/SiO 2 , 46.5% for 10Ni-3Ce/SiO 2 , and 49.8% for 10Ni-3La/SiO 2 .…”

Section: Methodsmentioning

confidence: 99%

Plasma-Induced Micro-combustion for the Synthesis of Ni–M/SiO₂ (M = La, Ce, Zr) Catalysts with High Selectivity toward CO₂ Methanation

Zhao

Liu

Shi

et al. 2022

Ind. Eng. Chem. Res.

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With La, Ce, and Zr as doping additives, Ni-based catalysts were prepared using a plasma-induced micro-combustion method. X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, H 2 temperature-programmed reduction, H 2 temperature-programmed desorption, CO 2 temperature-programmed desorption, and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs) were used to characterize the as-synthesized catalysts. The results illustrated that the catalysts after doping exhibited higher reducibility and a stronger interaction between the metal and support compared with SiO 2 -supported Ni catalyst without additives. The additives increased the electron density around metal Ni and oxygen vacancies of the support, which promoted the CO 2 and hydrogen adsorption. The catalysts were used in CO 2 methanation, and the 10Ni-3La/SiO 2 catalyst exhibited the highest turnover frequency of 0.517 s −1 and especially the highest CH 4 selectivity of 85% at 280 °C under a high space velocity of 120 000 mL/(gcat•h). DRIFTs analysis confirmed adding additives, especially La and Ce, could accelerate the integration of CO 2 species with dissociated H to generate formate intermediate, which facilitated methane formation.

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“…The development of catalysts for the methanation of CO 2 at low temperatures, with both high efficiency and selectivity, is still the focus of this field. A survey of the literature reveals that Co, , Ni, , Ru, ,− and Rh 31 -based catalysts allow for low-temperature catalysis, wherein Ru-based catalysts were more extensively studied and exhibited a higher catalytic activity probably due to their better durability than Ni-based catalysts and low cost compared to Rh-based catalysts …”

Section: Introductionmentioning

confidence: 99%

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO₂ under Mild Conditions

Wang

Ding

et al. 2022

ACS Sustainable Chem. Eng.

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In this work, the vapor-phase methanation of CO 2 at a low temperature was achieved under the catalysis of [Ru]@P(IL n -POSS)-Cl-A (n = 2, 3, 4) hybrids, wherein the molecular low-valent Ru complexes were encapsulated into the imidazolium chloridedecorated porous poly(ionic liquid) skeleton. Mechanistic studies suggest that it follows the cascade hydrogenation of CO 2 without the formation of CO intermediates and the presence of a chloride ligand at the Ru center is crucial for [Ru]@P(IL n -POSS)-Cl-A to reach a high activity. Besides, the textural structure of [Ru]@P(IL n -POSS)-Cl-A can be adjusted by the numbers of IL units (n) in the monomer, thereby affecting the activity and catalyst durability. As such, the activity is positively correlated with the specific surface area rather than the adsorption capacity of CO 2 , and thus, [Ru]@P(IL 2 -POSS)-Cl-A provided the best TON CH4 of 81 at 160 °C. On the other hand, the high density of the IL unit in [Ru]@P(IL 4 -POSS)-Cl-A is conductive to prevent the aggregation of the active Ru species, enabling satisfactory catalyst durability. As a proof of concept, the catalytic activity could be further improved by the strategy of a molecular fence, wherein the molecular Ru sites in [Ru-NMP]@P(IL 2 -POSS)-Cl-A were highly dispersed and stabilized with Nmethylpyrrolidone.

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Fabrication of surface oxygen vacancies on NiMnAl-LDO catalyst by high-shear mixer-assisted preparation for low-temperature CO2 methanation

Cited by 16 publications

References 75 publications

Enhancing Catalytic Performance with Sol‐Gel Hydrotalcite‐Derived Nickel Oxide Catalysts for Dry Reforming of Methane: An Examination on Reactivity and Coke Formation

Enhancing Catalytic Performance with Sol‐Gel Hydrotalcite‐Derived Nickel Oxide Catalysts for Dry Reforming of Methane: An Examination on Reactivity and Coke Formation

Plasma-Induced Micro-combustion for the Synthesis of Ni–M/SiO₂ (M = La, Ce, Zr) Catalysts with High Selectivity toward CO₂ Methanation

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO₂ under Mild Conditions

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Fabrication of surface oxygen vacancies on NiMnAl-LDO catalyst by high-shear mixer-assisted preparation for low-temperature CO2 methanation

Cited by 16 publications

References 75 publications

Enhancing Catalytic Performance with Sol‐Gel Hydrotalcite‐Derived Nickel Oxide Catalysts for Dry Reforming of Methane: An Examination on Reactivity and Coke Formation

Enhancing Catalytic Performance with Sol‐Gel Hydrotalcite‐Derived Nickel Oxide Catalysts for Dry Reforming of Methane: An Examination on Reactivity and Coke Formation

Plasma-Induced Micro-combustion for the Synthesis of Ni–M/SiO2 (M = La, Ce, Zr) Catalysts with High Selectivity toward CO2 Methanation

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO2 under Mild Conditions

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Product

Resources

About

Plasma-Induced Micro-combustion for the Synthesis of Ni–M/SiO₂ (M = La, Ce, Zr) Catalysts with High Selectivity toward CO₂ Methanation

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO₂ under Mild Conditions