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Quantum Chemical Study on the Decomposition of N_2O with O~-, O_2~-, and O_3~-

机译:N_2O被O〜-,O_2〜-和O_3〜-分解的量子化学研究

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摘要

High-level quantum chemical calculations have been performed on the decomposition reactions of N_2O with cation-stabilized oxygen species (O~-, O_2~-, and O_3~-), which compose a model catalytic cycle where O_2~- is regenerated. The calculated results show that O~- and O_3~- can be expected to be the most active species in the N_2O decomposition process, with activation barriers at the multiconfigurational second-order perturbation level (CASPT2) of 29.5 and 32.5 kcal/mol, respectively. The calculated activation barrier for N_2O decomposition through reaction with O_2~- is 40.8 kcal/mol. Comparison with experiments involving these species on metal-oxide substrates indicates the role of the ionic surface to reduce the barriers.
机译:对N_2O与阳离子稳定的氧(O〜-,O_2〜-和O_3〜-)的分解反应进行了高级量子化学计算,构成了其中O_2〜-被再生的模型催化循环。计算结果表明,在N_2O分解过程中,O〜-和O_3〜-有望成为最活跃的物种,在多构型二级扰动水平(CASPT2)的激活势垒分别为29.5和32.5 kcal / mol。 。通过与O_2〜-的反应计算得出的N_2O分解的活化势垒为40.8 kcal / mol。与涉及这些物质在金属氧化物基质上的实验的比较表明,离子表面在减少势垒方面的作用。

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