In-situ Raman spectroscopy analysis of the interfaces between Ni-based SOFC anodes and stabilized zirconia electrolyte

Агарков, Д. А.; Бурмистров, И. Н.; Tsybrov, Fedor; Tartakovskii, I. I.; Хартон, В.В.; Bredikhin, S. I.

doi:10.1016/j.ssi.2016.12.034

Cited by 29 publications

(15 citation statements)

References 24 publications

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“…The characteristic Raman peaks (Figure 9b) for the monoclinic phase zirconia were evidenced at 143, 174, 325, 377, and 468, while the characteristic peaks of the tetragonal phase zirconia were observed at 263 and 632 cm −1 . The existence of nickel oxide was confirmed by a signal at 1099 cm −1 in the 20% Ni/ZrO2-COP-F catalyst [43][44][45][46][47][48][49]. Significant changes in zirconia structure were observed for 20% Ni/ZrO2-COP-S catalyst, mainly in the bands exhibited for the monoclinic phase at 175, 325, and 468 cm −1 and those corresponding to nickel oxide at 776 and 956 cm −1 , which could be assigned to an Ni-O-Zr interaction.…”

Section: Resultsmentioning

confidence: 91%

High Selectivity and Stability of Nickel Catalysts for CO2 Methanation: Support Effects

et al. 2018

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In this work, we present an investigation concerning the evaluation of the catalytic properties of Ni nanoparticles supported on ZrO2, SiO2, and MgAl2O4 for CO2 hydrogenation to methane. The supports were prepared by coprecipitation and sol-gel, while Ni was incorporated by impregnation (10–20 wt %). X-ray diffraction, nitrogen physisorption, temperature-programmed reduction, H2 pulse chemisorption, Raman spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy were the main characterization techniques employed. A laboratory fixed-bed reactor operated at atmospheric pressure, a temperature range of 350–500 °C, and a stoichiometric H2/CO2 molar ratio was used for catalyst evaluation. The most outstanding results were obtained with nickel catalysts supported on ZrO2 with CO2 conversions of close to 60%, and selectivity to methane formation was 100% on a dry basis, with high stability after 250 h of reaction time. The majority presence of tetragonal zirconia, as well as the strong Ni–ZrO2 interaction, were responsible for the high catalytic performance of the Ni/ZrO2 catalysts.

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Section: Resultsmentioning

confidence: 91%

High Selectivity and Stability of Nickel Catalysts for CO2 Methanation: Support Effects

et al. 2018

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“…One can observe several overlapped peaks associated with zirconium and cerium oxides. The most intensive of them is attributed to ceria; zirconia signals are much lower compared to the electrolyte-supported cells [21,23]. The NiO peaks could also be separated from the room-temperature spectrum of oxidized anode, but their intensity is too low.…”

Section: Resultsmentioning

confidence: 96%

“…The membrane transparency in combination withring-shaped cathode enables to pass the laser excitation beam across solid electrolyte and to collect scattered radiation from the inner "anode | electrolyte" interface, simultaneously measuring the current vs. voltage dependencies and impedance spectra of the electrochemical cell. Similar in-situ approach proposed in our previous works [19][20][21][22][23] was based on the use of zirconia single crystals as the membrane of electrolytes u p p o r t e d c e l l s ( E S C s ) . H o w e v e r , t h e E S C geometry substantially limits the range of working temperatures and currents due to high ohmic resistance of the thick (~ 250 μm) zirconia membrane; its thickness also leads to the dominance of cubic zirconia contribution visible in the Raman spectra.…”

Section: Introductionmentioning

confidence: 99%

In-Situ Raman Spectroscopy Studies of Oxygen Spillover at Solid Oxide Fuel Cell Anodes

Eliseeva¹,

Бурмистров²,

Агарков³

et al. 2020

Chemical Problems

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The present work is centered on the combined studies of anodic processes in electrodesupported solid oxide fuel cells (SOFCs) usingin-situ Raman spectroscopic and electrochemical measurements. A possibility to perform direct spectroscopic measurements at the inner electrolyte | anode interface in the case of anode-supported SOFC with polycrystalline thin-film zirconia solid electrolyte was experimentally demonstrated. The application of anode-supported SOFC architecture makes also it possible to significantly extend the range of operating temperatures and current densities across the electrochemical cell. The results confirma direct incorporation of oxygen anions transported through zirconia electrolyte into the ceria-based anode sublayer, with subsequent fuel oxidation at the cermet anode.

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“…Raman spectra of the specimens were recorded on a Renishaw inVia Raman microscopic spectrometer (Renishaw, Wotton-under-Edge, Gloucestershire, UK) (λexc. = 532 nm) and with a home-made Raman setup that was described in previous works [13,14]. The crystal structure was studied using transmission electron microscopy at a 200 kV accelerating voltage with a JEM-2100 microscope (JEOL, Tokyo, Kanto, Japan).…”

Section: Methodsmentioning

confidence: 99%

Skull Melting Growth and Characterization of (ZrO2)0.89(Sc2O3)0.1(CeO2)0.01 Crystals

et al. 2020

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(ZrO2)0.89(Sc2O3)0.1(CeO2)0.01 crystals have been grown by directional melt crystallization in a cold crucible. The chemical and phase compositions of the crystals have been characterized using energy dispersion X-ray spectroscopy (EDX), Raman scattering spectroscopy and transmission electron microscopy (TEM). The X-ray photoelectron emission method has been used for determining the valence state of the Ce ions. We show that directional melt crystallization produces an inhomogeneous ceria distribution along the crystal length. The as-grown crystals are mixtures of cubic and rhombohedral zirconia modifications. The rhombohedral phase has an inhomogeneous distribution along crystal length. Melt crystallization does not produce single-phase cubic (ZrO2)0.89(Sc2O3)0.1(CeO2)0.01 crystals. The formation of the phase structure in the crystals for different synthesis methods has been discussed.

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In-situ Raman spectroscopy analysis of the interfaces between Ni-based SOFC anodes and stabilized zirconia electrolyte

Abstract: A new experimental approach for in-situ

Cited by 29 publications

References 24 publications

High Selectivity and Stability of Nickel Catalysts for CO2 Methanation: Support Effects

High Selectivity and Stability of Nickel Catalysts for CO2 Methanation: Support Effects

In-Situ Raman Spectroscopy Studies of Oxygen Spillover at Solid Oxide Fuel Cell Anodes

Skull Melting Growth and Characterization of (ZrO2)0.89(Sc2O3)0.1(CeO2)0.01 Crystals

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