Perovskite-Type Lanthanum Cobaltite LaCoO<sub>3</sub>: Aspects of Processing Route toward Practical Applications

Dragan, Mirela; Enache, Stanică; Varlam, Mihai; Petrov, Κ.

doi:10.5772/intechopen.86260

Cited by 12 publications

(6 citation statements)

References 32 publications

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“…Figure e indicates 2D pCN nanosheets having distinct flaked structures as a result of the sonicating treatment. Figure f displays FE-SEM images of LaCoO 3 having a larger and less agglomerated rhombohedral structure Figure g shows TiO 2 -grown Ti 3 C 2 sheets dispersed by LaCoO 3 .…”

Section: Resultsmentioning

confidence: 99%

Constructing Exfoliated, Ti₃C₂T_x MXene-Dispersed, LaCoO₃ and pC₃N₄-Based Nanocomposites with In Situ Grown Titania through Etching/Oxidation for Stimulating Solar H₂ Production

Tasleem

Tahir

2023

Energy Fuels

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The use of a well-designed Ti 3 C 2 MXene with in situ embedded titania nanoparticles to construct a porous carbon nitride (pCN)/LaCoO 3 Z-scheme and S-scheme heterojunction for stimulating solar hydrogen production has been explored. A novel oxidized/etched approach was employed to produce MXene to maximize charge separation in LaCoO 3 perovskite-dispersed pCN. On increasing the HF etching time from 24 to 48 h, the amount of titania embedded over the MXene was increased, enabling 1.71 times more H 2 evolution. More importantly, integrated etched/ oxidized Ti 3 C 2 nanoflowers showed more reaction area with enhanced light absorption, which was more prominent with increased temperature. The H 2 evolution was significantly increased due to in situ embedded TiO 2 . Comparatively, optimized 15Ti 3 C 2 T x /pCN was found to be more efficient at lower temperatures, which was further increased 7-fold with a 10Ti 3 C 2 T x / pCN-coupled LaCoO 3 Z-scheme heterojunction. This obvious enhancement was evidently due to utilizing the maximum redox potential with good interface interaction among the components to promote charge carrier separation. Among the sacrificial agents, TEOA was found to be more promising, with 9.1 times more H 2 production due to its strong bond with amine-based pCN, which was further confirmed by quantum analysis. In conclusion, the Z-scheme photosystem is promising for efficient mobility and separation of charges and would also be beneficial for other solar energy applications.

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Section: Resultsmentioning

confidence: 99%

Constructing Exfoliated, Ti₃C₂T_x MXene-Dispersed, LaCoO₃ and pC₃N₄-Based Nanocomposites with In Situ Grown Titania through Etching/Oxidation for Stimulating Solar H₂ Production

Tasleem

Tahir

2023

Energy Fuels

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“…In our previous work, we showed that single-phase perovskite LaCoO3 powders are readily obtained from lanthanum and cobalt oxide precursors by one-step solid-state synthesis at 1000 ∘C for 8 h [44,45]. The crystal structure of LaCoO3 is rhombohedral (space group R−3c, ICSD 01-084-0845).…”

Section: Resultsmentioning

confidence: 99%

Electronic Percolation Threshold of Self-Standing Ag-LaCoO3 Porous Electrodes for Practical Applications

et al. 2019

Self Cite

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Perovskite LaCoO 3 materials have various applications, from selective permeable membranes and gas sensing devices to water splitting applications. However, the intrinsic electrical resistivity of the perovskite limits the applicative potential. To overcome that, Ag powder was used with LaCoO 3 to obtain porous composite electrodes with enhanced conductivities. For that, a series of composite Ag-LaCoO 3 powders were prepared into pellets and pre-sintered at various temperatures up to 1000 ∘ C. Their structural properties and morphology were investigated by X-ray diffraction and scanning electron microscopy. The electronic transport of compacted specimens was studied by impedance spectroscopy. The results indicate that the presence of Ag acts as pre-sintering additive to obtain porous electrodes, with porosity values as high as 40% at 50 vol. % Ag. Moreover, the overall electrical resistivity of the composite electrodes varied well over four orders of magnitude. The results are discussed within the generalized Bruggeman theory for effective media comprising arbitrarily shaped metallic and semiconducting inclusions.

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“…LaCoO 3 (LCO), a complexing oxide with a perovskite-type structure, is another promising cathode material for SOFC due to its high electronic and ionic conductivities. [5,74] This mixed conductivity is attributed to the reaction sites available at the surface of LCO along with TPB without aiding any conductive materials. However, the incompatibility of this oxide with SOFC applications arises due to its high thermal expansion coefficient (TEC) and its tendency to react strongly with yttrium-stabilized zirconia electrolyte at temperatures exceeding 900 °C.…”

Section: Lscf (La 1-x Sr X Co 1-y Fe Y O 3-δ ) Cathode Materialsmentioning

confidence: 99%

Advancements in Perovskite‐Based Cathode Materials for Solid Oxide Fuel Cells: A Comprehensive Review

Samreen,

Ali,

Huzaifa

et al. 2023

The Chemical Record

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The high‐temperature solid oxide fuel cells (SOFCs) are the most efficient and green conversion technology for electricity generation from hydrogen‐based fuel as compared to conventional thermal power plants. Many efforts have been made to reduce the high operating temperature (>800 °C) to intermediate/low operating temperature (400 °C<T<800 °C) in SOFCs in order to extend their life span, thermal compatibility, cost‐effectiveness, and ease of fabrication. However, the major challenges in developing cathode materials for low/intermediate temperature SOFCs include structural stability, catalytic activity for oxygen adsorption and reduction, and tolerance against contaminants such as chromium, boron, and sulfur. This research aims to provide an updated review of the perovskite‐based state‐of‐the‐art cathode materials LaSrMnO3 (LSM) and LaSrCOFeO3 (LSCF), as well as the recent trending Ruddlesden‐Popper phase (RP) and double perovskite‐structured materials SOFCs technology. Our review highlights various strategies such as surface modification, codoping, infiltration/impregnation, and composites with fluorite phases to address the challenges related to LSM/LSCF‐based electrode materials and improve their electrocatalytic activity. Moreover, this study also offers insight into the electrochemical performance of the double perovskite oxides and Ruddlesden‐Popper phase materials as cathodes for SOFCs.

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Perovskite-Type Lanthanum Cobaltite LaCoO₃: Aspects of Processing Route toward Practical Applications

Cited by 12 publications

References 32 publications

Constructing Exfoliated, Ti₃C₂T_x MXene-Dispersed, LaCoO₃ and pC₃N₄-Based Nanocomposites with In Situ Grown Titania through Etching/Oxidation for Stimulating Solar H₂ Production

Constructing Exfoliated, Ti₃C₂T_x MXene-Dispersed, LaCoO₃ and pC₃N₄-Based Nanocomposites with In Situ Grown Titania through Etching/Oxidation for Stimulating Solar H₂ Production

Electronic Percolation Threshold of Self-Standing Ag-LaCoO3 Porous Electrodes for Practical Applications

Advancements in Perovskite‐Based Cathode Materials for Solid Oxide Fuel Cells: A Comprehensive Review

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Perovskite-Type Lanthanum Cobaltite LaCoO3: Aspects of Processing Route toward Practical Applications

Cited by 12 publications

References 32 publications

Constructing Exfoliated, Ti3C2Tx MXene-Dispersed, LaCoO3 and pC3N4-Based Nanocomposites with In Situ Grown Titania through Etching/Oxidation for Stimulating Solar H2 Production

Constructing Exfoliated, Ti3C2Tx MXene-Dispersed, LaCoO3 and pC3N4-Based Nanocomposites with In Situ Grown Titania through Etching/Oxidation for Stimulating Solar H2 Production

Electronic Percolation Threshold of Self-Standing Ag-LaCoO3 Porous Electrodes for Practical Applications

Advancements in Perovskite‐Based Cathode Materials for Solid Oxide Fuel Cells: A Comprehensive Review

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Perovskite-Type Lanthanum Cobaltite LaCoO₃: Aspects of Processing Route toward Practical Applications

Constructing Exfoliated, Ti₃C₂T_x MXene-Dispersed, LaCoO₃ and pC₃N₄-Based Nanocomposites with In Situ Grown Titania through Etching/Oxidation for Stimulating Solar H₂ Production

Constructing Exfoliated, Ti₃C₂T_x MXene-Dispersed, LaCoO₃ and pC₃N₄-Based Nanocomposites with In Situ Grown Titania through Etching/Oxidation for Stimulating Solar H₂ Production