Adsorption and reaction mechanism of UDMH and O2 on Cu2O (111) surface: A combined first-principles and reactive molecular dynamics study

被引:0
作者
Wang, Hao-yang [1 ]
Jia, Ying [1 ]
Lv, Xiao-meng [1 ]
Zhou, Wan-ting [1 ]
机构
[1] Xian Res Inst High Technol, Xian 710025, Peoples R China
基金
中国国家自然科学基金;
关键词
Unsymmetrical dimethylhydrazine; Density functional theory; Adsorption energies; Reaction mechanism; Molecular dynamics; WASTE-WATER;
D O I
10.1016/j.chemphys.2025.112750
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Unsymmetrical dimethylhydrazine (UDMH), a widely used liquid propellant, has garnered significant attention for its environmental monitoring challenges. This study explores the adsorption properties and reaction mechanisms of UDMH and oxygen on the Cu2O (111) surface through first-principles calculations and molecular dynamics simulations. Initially, adsorption energies and charge transfer dynamics were analyzed at various adsorption sites, revealing strong adsorption capacities for both UDMH and oxygen. Subsequently, molecular dynamics simulations elucidated the reaction pathways between UDMH and oxygen on the Cu2O (111) surface. The results indicate that UDMH undergoes rapid redox reactions with oxygen, forming multiple stable compounds. This highlights the substantial impact of oxygen on the accuracy of UDMH concentration detection by Cu2O-based sensors. These findings provide valuable insights for improving the design and functionality of gassensitive materials for UDMH detection.
引用
收藏
页数:6
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