NiO/CeO2-Sm2O3 nanocomposites for partial oxidation of methane: In-situ experiments by dispersive X-ray absorption spectroscopy

Toscani, Lucía M.; Bellora, Marina S.; Huck‐Iriart, Cristián; Soldati, Analía Leticia; Sacanell, Joaquín; Martins, Tereza Silva; Craievich, Aldo Felix; Fantini, M.C.A.; Larrondo, Susana Adelina; Lamas, Diego G.

doi:10.1016/j.apcata.2021.118357

Cited by 8 publications

(3 citation statements)

References 41 publications

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“…[2] Thus, many researchers have turned to ceria-based anodes modified with transition metals, since these materials exhibit ionic and electronic conductivity in reducing atmospheres, and excellent catalytic properties for the combustion of hydrocarbons. [3][4][5][6] Ni supported on ceria or ceria zirconia mixed oxides are active materials for electro catalysis, and, in order to provide a good level of electronic conductivity to the anode of SOFC, the Ni°c ontent is usually 50 vol %. For methane-fueled SOFCs, high nickel content represents a problem due to carbon deposition, which may lead to catalyst deactivation.…”

Section: Introductionmentioning

confidence: 99%

“…Materials used as anodes in SOFCs should fulfill special requirements such as having a stable microstructure, good levels of ionic and electronic conductivity, and high catalytic activity at reduced temperatures [2] . Thus, many researchers have turned to ceria‐based anodes modified with transition metals, since these materials exhibit ionic and electronic conductivity in reducing atmospheres, and excellent catalytic properties for the combustion of hydrocarbons [3–6] . Ni supported on ceria or ceria zirconia mixed oxides are active materials for electro catalysis, and, in order to provide a good level of electronic conductivity to the anode of SOFC, the Ni° content is usually 50 vol %.…”

Section: Introductionmentioning

confidence: 99%

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Phase Relationship and Ni Solubility in Nanoparticles of Ce_0.9Zr_0.1O₂

Zimicz,

Castillo,

Prado

et al. 2024

ChemistrySelect

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The phase relationship, defect formation, and incorporation of Ni in Ce0.9Zr0.1O2 have been investigated in samples of nominal composition (Ce0.9Zr0.1)1‐xNixO2‐δ with x=0.03, 0.05 and 0.1, synthesized by a cation complexation route and heat treated at 600, 800 and 1000 °C. Several structural (XRD, XAS, HRTEM) and spectroscopic (XPS, Raman) techniques have been used. Our data show the lattice parameters determined from XRD do not significantly vary with the Ni content or annealing temperature. The increasing defect concentration with increasing Ni content revealed by Raman spectra was associated to the formation of oxygen vacancies in the bulk due to coexistence of NiO and Ce0.9Zr0.1O2. On the other hand, no variation in the oxygen vacancies concentration was detected at the surface with increasing the Ni content by XPS data. In those samples with the lowest Ni concentrations (3 and 5 %) and heat treated at 600 °C, the analysis of the EXAFS zone of the K‐edge of Ni indicates that local order around Ni cations is not long‐range, suggesting the presence of a noncrystalline phase. When the Ni content is higher (10 %) and/or the temperature of the thermal treatment is increased, the crystallization of NiO is clearly detected by XRD, EXAFS and HRTEM.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phase Relationship and Ni Solubility in Nanoparticles of Ce_0.9Zr_0.1O₂

Zimicz,

Castillo,

Prado

et al. 2024

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…Quite popular and commonly used SOFC anode materials are composites based on nickel or its oxide with the addition of a solid electrolyte based on cerium or zirconium dioxide, which is doped with yttrium, scandium, or other rare earth elements, e.g., Ni—GDC (Ni—CeO 2 -Gd 2 O 3 ), NiO—SDC (NiO—CeO 2 -Sm 2 O 3 ), NiO—YSZ (NiO—ZrO 2 -Y 2 O 3 ), and Ni—ScSZ (Ni—ZrO 2 -Sc 2 O 3 ) [ 15 , 16 , 17 , 18 ]. The anode materials based on nickel oxide and samarium-doped ceria (NiO—SDC) have a higher ionic conductivity in the intermediate-temperature range compared with the traditionally used yttrium-stabilized zirconia cermets and also demonstrate a higher chemical resistance to carbonization when using methane and other hydrocarbons as a fuel, which attracts particular attention in this context [ 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of Nickel Oxide and Its Application in the Additive Manufacturing of Planar Nanostructures

et al. 2023

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The hydrothermal synthesis of nickel oxide in the presence of triethanolamine was studied. Furthermore, the relationship between the synthesis conditions, thermal behavior, crystal structure features, phase composition and microstructure of semi-products, and the target oxide nanopowders was established. The thermal behavior of the semi-products was studied using a simultaneous thermal analysis (in particular, using one that involved thermogravimetric analysis and differential scanning calorimetry, TGA/DSC). An X-ray diffraction (XRD) analysis revealed that varying the triethanolamine and nickel chloride concentration in the reaction system can govern the formation of α- and β-Ni(OH)2-based semi-products that contain Ni(HCO3)2 or Ni2(CO3)(OH)2 as additional components. The set of functional groups in the powders was determined using a Fourier-transform infrared (FTIR) spectroscopy analysis. Using microextrusion printing, a composite NiO—(CeO2)0.80(Sm2O3)0.20 anode film was fabricated. Using XRD, scanning electron microscopy (SEM), and atomic force microscopy (AFM) analyses, it was demonstrated that the crystal structure, dispersity, and microstructure character of the obtained material correspond to the initial nanopowders. Using Kelvin probe force microscopy (KPFM) and scanning capacitance microscopy (SCM), the local electrophysical properties of the printed composite film were examined. The value of its conductivity was evaluated using the four-probe method on a direct current in the temperature range of 300–650 °C. The activation energy for the 500–650 °C region, which is of most interest in the context of intermediate-temperature SOFCs working temperatures, has been estimated.

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Interface engineering of Ni/NiO hierarchical heterojunction for oxygen evolution reaction: A combined experimental and theoretical study

Liu

Jia

et al. 2022

Applied Surface Science

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NiO/CeO2-Sm2O3 nanocomposites for partial oxidation of methane: In-situ experiments by dispersive X-ray absorption spectroscopy

Cited by 8 publications

References 41 publications

Phase Relationship and Ni Solubility in Nanoparticles of Ce_0.9Zr_0.1O₂

Phase Relationship and Ni Solubility in Nanoparticles of Ce_0.9Zr_0.1O₂

Hydrothermal Synthesis of Nickel Oxide and Its Application in the Additive Manufacturing of Planar Nanostructures

Interface engineering of Ni/NiO hierarchical heterojunction for oxygen evolution reaction: A combined experimental and theoretical study

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NiO/CeO2-Sm2O3 nanocomposites for partial oxidation of methane: In-situ experiments by dispersive X-ray absorption spectroscopy

Cited by 8 publications

References 41 publications

Phase Relationship and Ni Solubility in Nanoparticles of Ce0.9Zr0.1O2

Phase Relationship and Ni Solubility in Nanoparticles of Ce0.9Zr0.1O2

Hydrothermal Synthesis of Nickel Oxide and Its Application in the Additive Manufacturing of Planar Nanostructures

Interface engineering of Ni/NiO hierarchical heterojunction for oxygen evolution reaction: A combined experimental and theoretical study

Contact Info

Product

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Phase Relationship and Ni Solubility in Nanoparticles of Ce_0.9Zr_0.1O₂

Phase Relationship and Ni Solubility in Nanoparticles of Ce_0.9Zr_0.1O₂