Analysis of label oxygen transfer during the reaction of N₂O decomposition (¹⁸O₂/N₂¹⁶O) on LaMnO_3 + δ indicated that ¹⁶O transfer from N₂¹⁶O to ¹⁶O₂ preceded faster compared to oxygen exchange ¹⁸O₂/¹⁶O₂ and involved the interaction with two lattice oxygen of perovskite. It suggests that surface oxygen vacancies play an important role in reactivity of LaMnO₃ and explains why at times correlation can be found between catalytic activity and bulk oxygen diffusion (La_1 − xSr_xMnO_3 ± δ) and at other time catalytic properties correlate with surface oxygen exchange constant (La_1−xSr_xFeO_3−θ). The former can be due to general correspondence between surface oxygen exchange kinetics and bulk oxygen diffusion.

中文翻译：

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LaMnO _{3 +δ}上N ₂ O分解的同位素瞬态动力学研究

在LaMnO _{3 +δ}上N ₂ O分解（¹⁸ O ₂ / N ₂ ¹⁶ O）反应过程中标记氧的转移表明，与氧交换¹⁸ O相比，从N ₂ ¹⁶ O到¹⁶ O _2的¹⁶ O转移要快。₂ / ¹⁶ ö ₂以及涉及到钙钛矿的2个晶格氧的相互作用。这表明表面氧空位在LaMnO _3的反应性中起重要作用并解释了为什么有时会发现催化活性与大量氧气扩散之间存在相关性（La _{1-  x} Sr _x MnO _3±δ），而有时催化性能却与表面氧交换常数相关（La _{1- x} Sr _x FeO _{3- θ}）。前者可能是由于表面氧交换动力学和氧扩散之间的一般对应关系。