Ionic–gelation synthesis of gadolinium doped ceria (Ce 0.8 Gd 0.2 O 1.90 ) nanocomposite powder using sodium-alginate

Pezeshkpour, Shaghayegh; Abdullah, Ahmad Zuhairi; Salamatinia, Babak; Horri, Bahman Amini

doi:10.1016/j.ceramint.2017.02.145

Cited by 11 publications

(5 citation statements)

References 54 publications

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“…The crystallite size and lattice constant of the synthesized GDC powders were estimated by Scherrer's equation and the Bragg equation, respectively (Table 1). The lattice parameter estimated for both the synthesized samples was around 5.43 Å, in excellent agreement with the literature value (5.42 Å from ICDD card no 50-0201) [43]. This confirms the homogeneous dissolution of gadolinium cations in the fluorite structure.…”

Section: Structural Characterization and Elemental Analysissupporting

confidence: 88%

“…The peaks obtained map well onto literature XRD patterns, with full compatibility with the ICDD data (card no. 50-0201) reported for both Gd0.1Ce0.9O1.95 and Gd0.2Ce0.8O1.9 [43]. The broad peaks observed with the synthesized powders indicate the formation of particles with smaller crystal sizes compared to the commercial GDC powder (for which sharper XRD peaks are observed).…”

Section: Structural Characterization and Elemental Analysismentioning

confidence: 87%

“…50-0201) reported for Gd0.1Ce0.9O1.95 and Gd0.2Ce0.8O1.9 [43]. All peaks in the profiles are assigned/indexed to the fluorite structure, specifically the (111), ( 200), ( 220), ( 311), ( 222), (400), ( 331) and (420) reflections [42].…”

Section: Structural Characterization and Elemental Analysismentioning

confidence: 99%

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A benzoate coprecipitation route for synthesizing nanocrystalline GDC powder with lowered sintering temperature

Ghaemi

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Horri

2021

Ceramics International

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Section: Structural Characterization and Elemental Analysissupporting

confidence: 88%

Section: Structural Characterization and Elemental Analysismentioning

confidence: 87%

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A benzoate coprecipitation route for synthesizing nanocrystalline GDC powder with lowered sintering temperature

Ghaemi

Slade

Horri

2021

Ceramics International

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“…Thus, choosing a proper fabrication method is of significant importance in achieving a high-performance SOFC with desirable properties [330]. In addition, the conventional solid-state reaction synthesis, the other fabrication techniques such as sol-gel [331], hydrothermal [332], citrate sol-gel [58], polymeric salt composition [333], co-precipitation [216], combustion synthesis [334], glycine-nitrate and citrate [152,335], impregnation [233], infiltration [249], Pechini [147], spray pyrolysis [334], ionic gelation [25], etc., have been used for the fabrication of various individual SOFC layers. For instance, in the case of microtubular SOFCs, gel-casting, extrusion, cold isostatic press, etc., have been extensively investigated for fabricating the supporting microtubes [330].…”

Section: Synthesis Methods and Conditionsmentioning

confidence: 99%

Progress in Material Development for Low-Temperature Solid Oxide Fuel Cells: A Review

Vostakola

Horri

2021

Energies

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Solid oxide fuel cells (SOFCs) have been considered as promising candidates to tackle the need for sustainable and efficient energy conversion devices. However, the current operating temperature of SOFCs poses critical challenges relating to the costs of fabrication and materials selection. To overcome these issues, many attempts have been made by the SOFC research and manufacturing communities for lowering the operating temperature to intermediate ranges (600–800 °C) and even lower temperatures (below 600 °C). Despite the interesting success and technical advantages obtained with the low-temperature SOFC, on the other hand, the cell operation at low temperature could noticeably increase the electrolyte ohmic loss and the polarization losses of the electrode that cause a decrease in the overall cell performance and energy conversion efficiency. In addition, the electrolyte ionic conductivity exponentially decreases with a decrease in operating temperature based on the Arrhenius conduction equation for semiconductors. To address these challenges, a variety of materials and fabrication methods have been developed in the past few years which are the subject of this critical review. Therefore, this paper focuses on the recent advances in the development of new low-temperature SOFCs materials, especially low-temperature electrolytes and electrodes with improved electrochemical properties, as well as summarizing the matching current collectors and sealants for the low-temperature region. Different strategies for improving the cell efficiency, the impact of operating variables on the performance of SOFCs, and the available choice of stack designs, as well as the costing factors, operational limits, and performance prospects, have been briefly summarized in this work.

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“…The synthesis of metal oxide nanoparticles (e.g., Ce 0.8 Gd 0.2 O 1.90 , NiO-GDC, Ho 2 Zr 2 O 7 , and Ni x Fe y O 4 ) based on sodium alginate gel solutions/granules has been previously developed and reported upon [ 1 , 2 , 3 , 4 ]. The alginate gelation is caused by the interaction that is present between the metal cations and the carboxylate groups in a hydrogel solution, with the cation exchange reaction occurring at a rapid rate [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

On-Line pH Measurement Cation Exchange Kinetics of Y3+-Exchanged Alginic Acid for Y2O3 Nanoparticles Synthesis

Liu,

Zhou,

Zhang

et al. 2024

Nanomaterials

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A new sol-gel method that employs cation exchange from an aqueous metal ion solution with H+ ions of granulated alginic acid was developed for synthesizing high-purity Y2O3 nanoparticles. In this study, the cation exchange kinetics of H+~Y3+ in aqueous solution were analyzed using on-line pH technology and off-line inductively coupled plasma-atomic emission spectrometry (ICP-AES) analysis. Pseudo 2nd-order models were utilized to evaluate the parameters of the kinetics, suggesting that the concentration of H+~Y3+ involved in the cation exchange reaction was 1:1.733. Further, a comprehensive understanding of the Y-ALG calcination process was developed using thermo-gravimetric analysis, along with results obtained from differential scanning calorimetry (TGA/DSC). A detailed analysis of the XRD Rietveld refinement plots revealed that the crystallite sizes of Y2O3 nanoparticles were about 4 nm (500 °C) and 15 nm (800 °C), respectively. Differential pulse voltammetry (DPV) was employed to investigate the electrochemical oxidation of catechol. The oxidation peak currents of catechol at Y2O3 (500 °C)/GCE and Y2O3 (800 °C)/GCE showed two stages linear function of concentration (2.0~20.0 × 10−6 mol/L, 20.0~60.0 × 10−6 mol/L). The results indicated that the detection limits were equal to 2.4 × 10−7 mol/L (Y2O3 (500 °C)/GCE) and 7.8 × 10−7 mol/L (Y2O3 (800 °C)/GCE). The study not only provided a method to synthesize metal oxide, but also proposed a promising on-line pH model to study cation exchange kinetics.

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Ionic–gelation synthesis of gadolinium doped ceria (Ce 0.8 Gd 0.2 O 1.90 ) nanocomposite powder using sodium-alginate

Cited by 11 publications

References 54 publications

A benzoate coprecipitation route for synthesizing nanocrystalline GDC powder with lowered sintering temperature

A benzoate coprecipitation route for synthesizing nanocrystalline GDC powder with lowered sintering temperature

Progress in Material Development for Low-Temperature Solid Oxide Fuel Cells: A Review

On-Line pH Measurement Cation Exchange Kinetics of Y3+-Exchanged Alginic Acid for Y2O3 Nanoparticles Synthesis

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