铜族金属与完整及氮掺杂石墨烯的相互作用

基于广义梯度密度泛函理论和周期平板模型,研究了铜族金属单原子和双原子簇与完整及氮掺杂石墨烯的结合情况.结果表明,氮掺杂后石墨烯的电子结构特性由半金属性变为金属性;铜族金属在完整及石墨型氮掺杂石墨烯上的吸附较弱,结合能约为0.5eV,而在吡啶型氮掺杂和吡咯型氮掺杂石墨烯上有较强的化学吸附,结合能一般大于1eV;吡咯型氮掺杂后的构型不稳定,金属原子及簇与包含该结构的石墨烯衬底作用时会使其向吡啶型氮掺杂转变,并最终得到基于吡啶型氮掺杂的稳定吸附构型.Mulliken电荷布居分析显示,吸附在吡啶型氮掺杂石墨烯上的金属单原子与金属双原子簇带电性质相反.态密度及轨道分析表明,Cu与吡啶型氮掺杂石墨烯空位处...

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Published in催化学报 Vol. 33; no. 9; pp. 1578 - 1585
Main Author 尹伟 林华香 章永凡 黄昕 陈文凯
Format Journal Article
LanguageChinese
Published 福州大学化学系,福建福州3501162%福州大学福建省光催化重点实验室—省部共建国家重点实验室培育基地,福建福州350002 2012
Subjects
吸附
密度泛函理论
氮掺杂
石墨烯
铜族金属
铜族金属
密度泛函理论
氮掺杂
吸附
石墨烯
Online AccessGet full text
ISSN0253-9837
1872-2067
DOI10.3724/SP.J.1088.2012.20416

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Abstract 基于广义梯度密度泛函理论和周期平板模型,研究了铜族金属单原子和双原子簇与完整及氮掺杂石墨烯的结合情况.结果表明,氮掺杂后石墨烯的电子结构特性由半金属性变为金属性;铜族金属在完整及石墨型氮掺杂石墨烯上的吸附较弱,结合能约为0.5eV,而在吡啶型氮掺杂和吡咯型氮掺杂石墨烯上有较强的化学吸附,结合能一般大于1eV;吡咯型氮掺杂后的构型不稳定,金属原子及簇与包含该结构的石墨烯衬底作用时会使其向吡啶型氮掺杂转变,并最终得到基于吡啶型氮掺杂的稳定吸附构型.Mulliken电荷布居分析显示,吸附在吡啶型氮掺杂石墨烯上的金属单原子与金属双原子簇带电性质相反.态密度及轨道分析表明,Cu与吡啶型氮掺杂石墨烯空位处留有悬挂键的三个原子成键,而Au与其中两个C原子成键.
AbstractList 基于广义梯度密度泛函理论和周期平板模型,研究了铜族金属单原子和双原子簇与完整及氮掺杂石墨烯的结合情况.结果表明,氮掺杂后石墨烯的电子结构特性由半金属性变为金属性;铜族金属在完整及石墨型氮掺杂石墨烯上的吸附较弱,结合能约为0.5eV,而在吡啶型氮掺杂和吡咯型氮掺杂石墨烯上有较强的化学吸附,结合能一般大于1eV;吡咯型氮掺杂后的构型不稳定,金属原子及簇与包含该结构的石墨烯衬底作用时会使其向吡啶型氮掺杂转变,并最终得到基于吡啶型氮掺杂的稳定吸附构型.Mulliken电荷布居分析显示,吸附在吡啶型氮掺杂石墨烯上的金属单原子与金属双原子簇带电性质相反.态密度及轨道分析表明,Cu与吡啶型氮掺杂石墨烯空位处留有悬挂键的三个原子成键,而Au与其中两个C原子成键.
O643; 基于广义梯度密度泛函理论和周期平板模型,研究了铜族金属单原子和双原子簇与完整及氮掺杂石墨烯的结合情况.结果表明,氮掺杂后石墨烯的电子结构特性由半金属性变为金属性;铜族金属在完整及石墨型氮掺杂石墨烯上的吸附较弱,结合能约为0.5 eV,而在吡啶型氮掺杂和吡咯型氮掺杂石墨烯上有较强的化学吸附,结合能一般大于1 eV;吡咯型氮掺杂后的构型不稳定,金属原子及簇与包含该结构的石墨烯衬底作用时会使其向吡啶型氮掺杂转变,并最终得到基于吡啶型氮掺杂的稳定吸附构型. Mulliken 电荷布居分析显示,吸附在吡啶型氮掺杂石墨烯上的金属单原子与金属双原子簇带电性质相反.态密度及轨道分析表明, Cu 与吡啶型氮掺杂石墨烯空位处留有悬挂键的三个原子成键,而 Au 与其中两个 C 原子成键.
Author 尹伟 林华香 章永凡 黄昕 陈文凯
AuthorAffiliation 福州大学化学系,福建福州350116 福州大学福建省光催化重点实验室一省部共建国家重点实验室培育基地,福建福州350002
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Keywords 铜族金属
密度泛函理论
氮掺杂
吸附
石墨烯
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Notes The binding strength of coinage metal （IB group） single and double atoms clusters on perfect or N-doped graphene has been stud- ied with the periodic slab model using generalized gradient approximation （GGA）. The calculated results indicated that N-doped graphene showed metallic electron properties rather than semimetallic ones of perfect graphene. Physical or weak chemical adsorption was got on perfect or graphite N-doped graphene with the binding energy around 0.5 eV. Chemical adsorption happened on pyridine N-doped graphene and pyrrole N-doped graphene with binding energy above 1 eV. Pyrrole N-doped graphene was less stable than graphite N-doped graphene or pyridine N-doped graphene. When adsorbates interacted with pyrrole N-doped graphene, it carried out the transition from pyrrole N-doped graphene to pyridine N-doped graphene, and the most stable adsorption structure based on pyridine N-doped graphene was obtained finally. The analysis of Mulliken population indicated that metal single atoms had positive
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PublicationTitle 催化学报
PublicationTitleAlternate Chinese Journal of Catalysis
PublicationTitle_FL Chinese Journal of Catalysis
PublicationYear 2012
Publisher 福州大学化学系,福建福州3501162%福州大学福建省光催化重点实验室—省部共建国家重点实验室培育基地,福建福州350002
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Snippet 基于广义梯度密度泛函理论和周期平板模型,研究了铜族金属单原子和双原子簇与完整及氮掺杂石墨烯的结合情况.结果表明,氮掺杂后石墨烯的电子结构特性由半金属性变为金属性;...
O643; 基于广义梯度密度泛函理论和周期平板模型,研究了铜族金属单原子和双原子簇与完整及氮掺杂石墨烯的结合情况.结果表明,氮掺杂后石墨烯的电子结构特性由半金属性变为金...
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SubjectTerms 吸附
密度泛函理论
氮掺杂
石墨烯
铜族金属
Title 铜族金属与完整及氮掺杂石墨烯的相互作用
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