论文部分内容阅读
研究了La_(1-x)Sr_xNiO_(3-λ)(0≤x≤1)系列催化剂的固态性质与催化氨氧化反应性能的关系。发现在LaNiO_3中掺入Sr~(2+),在x≤0.3的范围内,催化剂保持钙钛石结构不变,但晶格发生了较大的畸变,氧空位有序化程度提高;在X>0.3的范围内,钙钛石结构逐步被破坏,出现La_2NiO_4相。此系列催化剂用于氨氧化反应,Ni~(3+)是主要的活性离子,O~-或O_2~(2-)离子为主要活性氧种,反应遵循Redox机理。
The relationship between the solid state properties of La_ (1-x) Sr_xNiO_ (3-λ) (0≤x≤1) catalysts and the catalytic performance of the ammoxidation was investigated. It is found that when Sr 2+ is doped into LaNiO 3, the structure of perovskite remains unchanged in the range of x≤0.3, however, the crystal lattice undergoes large distortion and the order of oxygen vacancies increases. > 0.3 range, the perovskite structure is gradually destroyed, appear La_2NiO_4 phase. This series of catalysts is used for ammoxidation. Ni 3+ is the main active ion and O 2- or O 2 2- ions are the main active oxygen species. The reaction follows the mechanism of Redox.