XPS Studies of Sr doped La2CuO4: A potential cathode material for IT-SOFCs

Tyagi, Deepak; Srinivasan, Sriraksha; Wani, B.N.; Bharadwaj, S.R.

doi:10.1016/j.matpr.2018.11.022

Cited by 5 publications

(5 citation statements)

References 3 publications

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“…As it can be seen in the mentioned figure, the peak intensity of the Zn 2p increased after hydrothermal growth of ZnO NWs, which is due to the formation a dense ZnO NW. The peaks at around 530.6 ± 0.2 (Figure b and b′), 1021.7 ± 0.3, and 1043.5 ± 0.3 (Figure d and d′) eV, indicate that Zn and O elements are in the form of Zn 2+ and O 2– chemical valence states). − As it can be concluded from Figure and the above explanations, the binding energy for most elements remained almost unchanged after growing ZnO nanowire.…”

Section: Resultsmentioning

confidence: 78%

Hierarchical Dense Array of ZnO Nanowires Spatially Grown on ZnO/TiO₂ Nanofibers and Their Ultraviolet Activated Gas Sensing Properties

et al. 2019

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A three-dimensional heterostructure using selective growth of ZnO nanowires on TiO 2 /ZnO nanocomposite nanofiber by a novel combination of a postseeding method in an electrospinning process and a hydrothermal technique is presented in this work. A hierarchical dense array of ZnO nanowires with a diameter of 70−120 nm and an aspect ratio of about 10 on TiO 2 /ZnO composite nanofibers (ZnO@TiO 2 /ZnO) was fabricated. XRD, UV−vis, FESEM, HRTEM, TEM, EDX, and XPS analyses were used for characterization of nanofibers. The results demonstrate about 4 times enhancement in UV spectrum absorption in the range of 240−300 nm compared to the nonhierarchical structures. It was found that the optimized operating temperatures for TiO 2 /ZnO nanofibers were 260 and 240 °C in the dark and under UV illumination. Results showed that ZnO@TiO 2 /ZnO exhibit about 3 times improvement in gas sensitivity with UV irradiation for 10−200 ppm of ethanol gas with reduced response and recovery times. UV-illuminated ZnO@TiO 2 /ZnO had about 3.81 and 4.30 times selectivity on ethanol with respect to acetone and toluene.

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Section: Resultsmentioning

confidence: 78%

Hierarchical Dense Array of ZnO Nanowires Spatially Grown on ZnO/TiO₂ Nanofibers and Their Ultraviolet Activated Gas Sensing Properties

et al. 2019

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“…The peaks at low and high binding energies in the O 1s XPS spectra belonged to lattice oxygen and adsorbed oxygen, respectively (Figure d) . The peak of the lattice oxygen was shifted by about 1.7 eV toward the high binding energy due to the doping of Sr . It could be seen that all three samples had the nature of adsorbed oxygen.…”

Section: Resultsmentioning

confidence: 91%

“…23 The content of Cu 3+ in La 4d). 24 The peak of the lattice oxygen was shifted by about 1.7 eV toward the high binding energy due to the doping of Sr. 25 It could be seen that all three samples had the nature of adsorbed oxygen. In the perovskite-like structure, the adsorption and evolution of oxygen largely affect its properties.…”

Section: Morphologies and Structuresmentioning

confidence: 91%

Synthesis and Mechanism of Co²⁺/Sr²⁺ Codoped Magnetic Lanthanum Cuprate with Excellent Corrosion Resistance

Tian,

Chen,

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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The special structure of perovskite-like compounds allows the existence of some open spaces in the crystals that play an important role in their crystal function enhancement and can accommodate active oxygen, which helps to solve some problems in the field of corrosion prevention. The magnetic lanthanum cuprate was obtained through the doping of Co2+ and Sr2+, and compared with La2CuO4 and epoxy resin, its corrosion resistance was improved by 215.2 and 566.7%, respectively. The micromagnetic field in the crystal interfered with the state of motion of the electrons and prolonged their transport path. High concentration doping and substitution of unequal states led to the formation of oxygen vacancy defects, which could trap active oxygen molecules and inhibit cathodic corrosion reactions. The unique alternating interlayer structure of perovskite-like compounds was conducive to the release of Cu2+, thus forming a more stable passivator on the surface of the coating. La1.96Sr0.04Cu0.98Co0.02O4 had both magnetic properties and structural advantages, which enhanced the shielding property of epoxy resin and expanded the application of perovskite-like compounds in the field of corrosion prevention.

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“…S5c, ESI †). 44,45 In addition, it has been demonstrated that A-site doping in perovskite oxides can alter the material's structure, 46 elevated oxygen vacancy concentration, 47,48 which alter the local coordination environment of the B-site ions, leading to enhanced interactions between the B-site ions and the surrounding ions, triggering a change in valence, 46 due to the increase in oxygen vacancy concentration, the valence state of the B-site ion is usually lowered to maintain electroneutrality. 20,47 Fig.…”

Section: Crystal Structures and Microstructures Of The Perovskite Cat...mentioning

confidence: 99%

“…After A-site doping, the binding energy of La shifts to 835.2 eV for LCCO, and 835.5 eV for LSCO, respectively. Additionally, the binding energy of 882.1 eV is ascribed to Ce 3d 5/2 in +4 oxidation state for LCCO (Fig.S5b, ESI †) and 132.1 eV is assigned to Sr 3d 5/2 at +2 oxidation state (Fig.S5c, ESI †) 44,45. In addition, it has been demonstrated that A-site doping in perovskite oxides can alter the material's structure,46 and…”

mentioning

confidence: 98%

Engineering highly selective CO₂ electroreduction in Cu-based perovskites through A-site cation manipulation

Yang,

Chen,

Shao

et al. 2024

Phys. Chem. Chem. Phys.

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XPS Studies of Sr doped La2CuO4: A potential cathode material for IT-SOFCs

Cited by 5 publications

References 3 publications

Hierarchical Dense Array of ZnO Nanowires Spatially Grown on ZnO/TiO₂ Nanofibers and Their Ultraviolet Activated Gas Sensing Properties

Hierarchical Dense Array of ZnO Nanowires Spatially Grown on ZnO/TiO₂ Nanofibers and Their Ultraviolet Activated Gas Sensing Properties

Synthesis and Mechanism of Co²⁺/Sr²⁺ Codoped Magnetic Lanthanum Cuprate with Excellent Corrosion Resistance

Engineering highly selective CO₂ electroreduction in Cu-based perovskites through A-site cation manipulation

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XPS Studies of Sr doped La2CuO4: A potential cathode material for IT-SOFCs

Cited by 5 publications

References 3 publications

Hierarchical Dense Array of ZnO Nanowires Spatially Grown on ZnO/TiO2 Nanofibers and Their Ultraviolet Activated Gas Sensing Properties

Hierarchical Dense Array of ZnO Nanowires Spatially Grown on ZnO/TiO2 Nanofibers and Their Ultraviolet Activated Gas Sensing Properties

Synthesis and Mechanism of Co2+/Sr2+ Codoped Magnetic Lanthanum Cuprate with Excellent Corrosion Resistance

Engineering highly selective CO2 electroreduction in Cu-based perovskites through A-site cation manipulation

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Hierarchical Dense Array of ZnO Nanowires Spatially Grown on ZnO/TiO₂ Nanofibers and Their Ultraviolet Activated Gas Sensing Properties

Hierarchical Dense Array of ZnO Nanowires Spatially Grown on ZnO/TiO₂ Nanofibers and Their Ultraviolet Activated Gas Sensing Properties

Synthesis and Mechanism of Co²⁺/Sr²⁺ Codoped Magnetic Lanthanum Cuprate with Excellent Corrosion Resistance

Engineering highly selective CO₂ electroreduction in Cu-based perovskites through A-site cation manipulation