人工晶体学报2024，Vol.53Issue(10)：1752-1758,7.
二维金属有机框架电子性质的电场调控:第一性原理研究
Electric Field Modulated Electronic Properties of Two-Dimensional Metal-Organic Framework:First-Principles Study
摘要
Abstract
Based on density functional theory(DFT),a two-dimensional(2D)metal-organic framework(MOF)based on Co and Cu atoms were presented.Based on the phonon dispersion calculations,no imaginary mode is found in the phonon branches,which verifies that the crystal structures of MOF could be stable.Based on the calculation of electronic band structure,it is found that the Cu-based MOF is a metallic system by applying external electric field.While the Co-based MOF undergoes a transition from metal to semiconductor under external electric field.When the external electric field intensity reaches up to 0.5 eV/Å,the band gap of Co-based MOF is around 0.1 eV,while this does not happen in the Cu-based MOF.Furthermore,the N2 adsorption and the nitrogen reduction reaction(NRR)were investigated for the Co-based MOF,which shows that the NRR for the Co-based MOF exhibits good performance,and the electric field could enhance this effect of NRR.The free energy of NRR under external electric field of 0.5 eV/Å is 0.51 eV lower than that without electric field.Therefore,our study would prospectively guide the experimental researchers on the design of NRR.关键词
二维MOF/声子能谱/能带结构/氮还原反应/密度泛函理论/第一性原理Key words
2D MOF/phonon dispersion/band structure/NRR/DFT/first-principle分类
数理科学引用本文复制引用
杨燕,王献朗,陈昊天,卢浩,佘世雄,黄智昊..二维金属有机框架电子性质的电场调控:第一性原理研究[J].人工晶体学报,2024,53(10):1752-1758,7.基金项目
青海省自然科学基金(2020-ZJ-742) （2020-ZJ-742）
国家自然科学基金(22164017) （22164017）
