Proteic sol-gel synthesis of copper doped misfit Ca-cobaltites with potential SOFC application

Lima, Chrystian G.M.; Silva, Rinaldo M.; Aquino, Flávia de Medeiros; Raveau, B.; Caignaert, V.; Cesário, Moisés R.; Macedo, Daniel A.

doi:10.1016/j.matchemphys.2016.11.063

Cited by 21 publications

(2 citation statements)

References 30 publications

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“…ethylene glycol of 1:1. This method has already been successfully used to synthesize several other materials for energy conversion and storagerelated applications [13,14,16,[20][21][22][23].…”

Section: Graphic Abstract Introductionmentioning

confidence: 99%

Proteic sol–gel synthesis of Gd-doped ceria: a comprehensive structural, chemical, microstructural and electrical analysis

et al. 2020

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Gd-doped ceria (Ce 1-x Gd x O 2-d ; x = 0, 0.1 and 0.2) is one of the best ceramic electrolytes for application in solid oxide electrochemical devices. This work reports an innovative and environmentally friendly route known as ''proteic sol-gel synthesis'' using gelatin for their preparation. Materials are characterized via thermogravimetric analysis, X-ray diffractometry, scanning electron microscopy, Raman and X-ray photoelectron spectroscopies, and electrochemical impedance spectroscopy. The proposed method allows to produce pure phase nanosized powders at 400 °C that exhibit excellent sinterability at 1350 °C. Significant differences are found in the bulk at lower temperatures, with estimated defect association enthalpies of 0.45 and 0.56 eV for the compositions containing 10 and 20 mol% Gd, respectively, leading to an increased bulk conductivity in the first case. In contrast, identical grain boundary Schottky barrier height values of around 0.2 V are a possible result of the relatively low sintering temperature, decreasing the extent of the acceptor dopant segregation to the grain boundaries due to insufficient cation mobility. This leads to similar specific grain boundary characteristics in both doped compositions. Overall, this work provides a rational understanding of a novel route for the synthesis of CGO ceramics with competitive performance and decreased sintering temperature.

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Section: Graphic Abstract Introductionmentioning

confidence: 99%

Proteic sol–gel synthesis of Gd-doped ceria: a comprehensive structural, chemical, microstructural and electrical analysis

et al. 2020

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“…However, due to its high cost, efforts have been made to develop metal oxide catalysts that can combine improved electrochemical activity with low cost [4]. Moreover, calcium-cobaltites (such as Ca 3 Co 4 O 9 , hereafter called C349) have been widely investigated for energy-related applications [5][6][7]. The electrochemical performance of powdered C349 as a potential electrode for ORR/OER has already been reported [8].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical assessment of Ca3Co4O9 nanofibres obtained by Solution Blow Spinning

et al. 2018

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Ca 3 Co 4 O 9 (C349) nanofibres were obtained by Solution Blow Spinning (SBS) and evaluated as electrocatalysts for Oxygen Reduction and Oxygen Evolution Reactions (ORR and OER). Calcined nanofibres were characterised in terms of structural, morphological and electrochemical features.Results showed that catalytic activity of C349 nanofibres for ORR/OER is in line with literature data for carbon-related materials. The areal capacitance is much better than that of TiO 2 nanotubes.

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Progress in Misfit Ca-Cobaltite Electrodes for Solid Oxide Electrochemical Cells

Araújo

Macedo

Graça

et al. 2022

Handbook of Energy Materials

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Proteic sol-gel synthesis of copper doped misfit Ca-cobaltites with potential SOFC application

Cited by 21 publications

References 30 publications

Proteic sol–gel synthesis of Gd-doped ceria: a comprehensive structural, chemical, microstructural and electrical analysis

Proteic sol–gel synthesis of Gd-doped ceria: a comprehensive structural, chemical, microstructural and electrical analysis

Electrochemical assessment of Ca3Co4O9 nanofibres obtained by Solution Blow Spinning

Progress in Misfit Ca-Cobaltite Electrodes for Solid Oxide Electrochemical Cells

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