Synthesis and Characterization of LaNiO3, LaNi(1-x)Fe xO3 andLaNi(1-x)Co xO3 Perovskite Oxides for Catalysis Application
Synthesis and Characterization of LaNiO3, LaNi(1-x)Fe xO3 andLaNi(1-x)Co xO3 Perovskite Oxides for Catalysis Application
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LaNiO3、LaNi(1-x)Fe xO3 和LaNi(1-x)Co xO3 钙钛矿氧化物的合成与表征及其催化应用
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发表时间：
2002
期刊：
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通讯作者：
J. Assaf
中科院分区：
文献类型：
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作者：
S. M. D. Lima;J. Assaf
具有钙钛矿型结构的混合金属氧化物在催化、电催化和电子陶瓷等方面显示出巨大的应用潜力。采用沉淀法合成了LaNiO 3、LaNi（1-x）FexO 3和LaNi（1-x）CoxO 3（x = 0.4和0.7）三种钙钛矿型氧化物催化剂，用于甲烷重整制氢和合成气。通过X射线衍射、热重和差热分析、电感耦合等离子体原子发射光谱、比表面积测量、能量色散X射线光谱、扫描电子显微镜和程序升温还原对化合物进行了表征。结果表明，将制备方法与煅烧条件（时间和温度）相结合，可以制备出具有所需结构和重要性能的氧化物。
Mixed metal oxides with perovskite-type structure show a great potential to be used in catalysis, electrocatalysis and electronic ceramics. Perovskites oxides catalysts with the composition LaNiO3, LaNi(1-x)FexO3 and LaNi(1-x)CoxO3 (x = 0.4 and 0.7) have been synthesized by the precipitation method to be used in the methane reforming to produce hydrogen and synthesis gas. The compounds were characterized by X-ray diffraction, thermogravimetric and differential thermal analysis, inductively coupled plasma atomic emission spectroscopy, surface area measurements, energy dispersive X-ray spectrometry coupled to scanning electron microscopy and temperature programmed reduction. The results showed that a suitable combination of the preparation method with calcination variables (time and temperature) could result in oxides with the desired structure and with important properties at the application point of view in heterogeneous catalysis.