2007
DOI: 10.1590/s0100-40422007000500002
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Estudo da oxidação total do etanol usando óxidos tipo perovskita LaBO3 (B= Mn, Ni, Fe)

Abstract: Recebido em 16/11/05; aceito em 1/3/07; publicado na web em 30/7/07 STUDY OF TOTAL OXIDATION OF ETHANOL USING THE PEROVSKITE-TYPE OXIDES LaBO 3 (B= Mn, Ni, Fe). The present work investigated the effect of coprecipitation-oxidant synthesis on the specific surface area of perovskite-type oxides LaBO 3 (B= Mn, Ni, Fe) for total oxidation of ethanol. The perovskite-type oxides were characterized by X-ray diffraction, nitrogen adsorption (BET method), thermogravimetric analysis (TGA-DTA), TPR and X-ray photoelectro… Show more

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Cited by 9 publications
(8 citation statements)
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“…For example, increasing substitution of Sr 2+ for La 3+ on the A-site of LaFe 0.2 Co 0.8 O leads to increased oxygen nonstoichiometry and subsequently increased ionic conductivity at the expense of stability of the cubic perovskite phase [8] Recently, these materials have been used for catalyst or supported media for the production of oxygen from air [9], which justifies its constant research. This fact is attributed to the capacity of this simple structure to accommodate a wide variety of ions with different valences and it can be easily synthesized due to its chemical structure flexibility [10,11], indicating the importance of this type of perovskite oxide. However, only a small fraction of materials presenting perovskite structure has been explored in the catalysis field at low temperature [12][13][14], although a catalyst is actually used in the majority of the chemical and petrochemical industrial processes.…”
Section: Introductionmentioning
confidence: 99%
“…For example, increasing substitution of Sr 2+ for La 3+ on the A-site of LaFe 0.2 Co 0.8 O leads to increased oxygen nonstoichiometry and subsequently increased ionic conductivity at the expense of stability of the cubic perovskite phase [8] Recently, these materials have been used for catalyst or supported media for the production of oxygen from air [9], which justifies its constant research. This fact is attributed to the capacity of this simple structure to accommodate a wide variety of ions with different valences and it can be easily synthesized due to its chemical structure flexibility [10,11], indicating the importance of this type of perovskite oxide. However, only a small fraction of materials presenting perovskite structure has been explored in the catalysis field at low temperature [12][13][14], although a catalyst is actually used in the majority of the chemical and petrochemical industrial processes.…”
Section: Introductionmentioning
confidence: 99%
“…[1][2][3] Os compostos mais numerosos e interessantes com a estrutura perovsquita são os óxidos mistos com fórmula geral ABO 3 , no qual geralmente o sítio A é ocupado por um elemento terra rara e/ou um alcalino terroso e o sítio B é um metal de transição 3d, no estado de oxidação +3. Além disto, para que a estrutura perovsquita seja formada é necessário que a soma das cargas dos cátions A e B seja +6.…”
Section: Introductionunclassified
“…Além disto, para que a estrutura perovsquita seja formada é necessário que a soma das cargas dos cátions A e B seja +6. 2,[4][5][6][7][8] A perovsquita do tipo LaNiO 3 é um óxido metálico terra rara típico, que tem sido amplamente investigado como estudo de caso dentre as perovsquitas de terras raras contendo Ni 3+ .…”
Section: Introductionunclassified
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