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A catalyst-free achieving of N-doped carbon nanotubes: The healing of single-vacancy defects by NO molecule
被引:4
|作者:
Esrafili, Mehdi D.
[1
]
Saeidi, Nasibeh
[1
]
机构:
[1] Univ Maragheh, Dept Chem, Lab Theoret Chem, Maragheh, Iran
关键词:
Carbon nanotube;
Healing;
Nitrogen oxide;
DFT;
Vacancy;
OXYGEN REDUCTION REACTION;
TOPOLOGICAL DEFECTS;
ELECTRONIC-PROPERTIES;
ADSORPTION;
BORON;
GRAPHENE;
MONOXIDE;
ENERGY;
D O I:
10.1016/j.cplett.2017.11.017
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:
Density functional theory calculations are performed to study the healing mechanism of single-vacancy defects in zigzag (n,0) CNTs by NO molecule (n = 6,8,10). The results indicate that the healing process proceeds through a two-step mechanism. First, NO molecule adsorbs over the defective site. Then, the extra oxygen atom (O-ads) is eliminated by three different ways: (i) NO + O-ads -> NO2, (ii) CO + O-ads -> CO2, or (iii) SO2 + O-ads -> SO3. The dependency of the healing process on the tube diameter is studied in detail. The results of this work suggest a novel approach to achieve N-doped CNTs. (C) 2017 Elsevier B.V. All rights reserved.
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页码:172 / 177
页数:6
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