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|Title:||Correlation of catalytic oxidation and ionic conductivity properties of nanostructured gadolinium-doped ceria.|
|Authors:||Godinho Júnior, Mário|
Rodrigues, Murillo H. M.
Gonçalves, Rosana de Fátima
Roca, Román Alvarez
Mota, Fabiana Villela
Fajardo, Humberto Vieira
|Citation:||GODINHO JÚNIOR, M. et al. Correlation of catalytic oxidation and ionic conductivity properties of nanostructured gadolinium-doped ceria. Materials Science and Engineering B-Advanced Functional Solid-State Materials, v. 266, artigo 115060, 2021. Disponível em: <https://www.sciencedirect.com/science/article/abs/pii/S0921510721000209>. Acesso em: 10 jun. 2021.|
|Abstract:||This paper reports the relationship between ionic conductivity and catalytic activity of ionic conductors based on gadolinium-doped ceria (GDC) at different temperatures. The samples have been characterized by transmission electron microscopy techniques, and the results indicated a highly homogeneous particle size, which confirmed their nanometric size. Afterward, the structure determined using X-ray diffraction analysis has been used to analyze the effect of dopant insertion. Lastly, ionic conductivity data were obtained using the impedance technique and were compared with the conversion rates of volatile organic compounds using GDC heterogeneous catalysts. The samples containing 15% gadolinium presented higher catalytic activity for the oxidation of n hexane (82,5%) as well as higher ionic conductivity at 400 ◦C (3.09 × 10− 4 S⋅cm− 1 ). An attempt is made to correlate conductivity and catalytic oxidation in terms of oxygen mobility, vacancies, and superoxide formation.|
|Appears in Collections:||DEQUI - Artigos publicados em periódicos|
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