Dynamic process of H-controlled oxygen concentration in LBE: A first-principles study

Dynamic process of H-controlled oxygen concentration in LBE: A first-principles study
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LBE 中 H 控制氧浓度的动态过程:第一性原理研究

DOI:
10.1016/j.jnucmat.2015.09.037
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发表时间:
2015-12
影响因子:
3.1
通讯作者:
Pan, B. C.
Pan, B. C.
中科院分区:
工程技术2区
文献类型:
--
作者:
Zhang, Y. G.;He, H. Y.;Liu, C. S.;Pan, B. C.

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采用第一性原理分子动力学方法研究了液态铅铋共晶中氢的行为和氢控制氧浓度的动态过程。我们的计算表明,LBE中的H2分子解离为扩散的H原子,呈H-金属团簇的形式。同时,H更倾向于与LBE中的O相互作用,形成HO自由基和H2O分子,降低了LBE中的O浓度。通过质量作用分析,定量预测了不同温度下,LBE中O浓度随H2引入量的变化。我们的研究结果对于LBE实验中氢控氧浓度的测量具有实用价值。
First-principles molecular dynamics simulations have been performed to study the behaviors of H and the dynamic process of H-controlled O concentration in the liquid lead bismuth eutectic (LBE). Our calculations show that H2molecules in LBE are dissociated to be diffusive H atoms, taking the forms of H-metal clusters. Meanwhile, H prefers to interact with O in LBE to form HO radicals and H2O molecules, reducing the O concentration in LBE. With the mass action analysis, we quantitatively predict the variation of the O concentration in LBE with the amount of the introduced H2at different temperatures. Our results are practical for the H-controlled O concentration in LBE experiments.
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