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钙钛矿ABO_3复合氧化物用于取代贵金属催化剂的研究工作已取得突破性进展尤其是近几年来在具有钙钛矿结构类型化合物中高临界温度超导材料的发现,更引起国内外学者的重视。对LaCoO_3的结构及各种物化性质的研究已相当多。Lam等用XPS对LaCoO_3一类化合物的价带谱进行过研究,并且与用分子簇、自由离子模型的计算结果进行比较,解释了LaCoO_3的电子结构。我们曾对La_(1-x)Sr_xCoO_3中La与配位体之间的作用,表面氧的状态以及在氢气气氛下钴的还原行为作过研究,但至今对
The research progress of perovskite ABO_3 composite oxide for replacing precious metal catalysts has made breakthroughs. Especially in recent years, the discovery of high-temperature superconducting materials with perovskite structure type compounds has drawn more and more attention from scholars at home and abroad. The structure of LaCoO_3 and a variety of physical and chemical properties of the study has been quite a lot. Lam et al. Studied the valence band spectra of a class of LaCoO_3 compounds by XPS, and compared the calculated results with molecular clusters and free ion models to explain the electronic structure of LaCoO_3. We have studied the interaction between La and the ligand in La 1-x Sr x CoO 3, the state of surface oxygen and the reduction behavior of cobalt under hydrogen atmosphere. However,