期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 120, 期 16, 页码 8804-8812出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.6b02097
关键词
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资金
- National Natural Science Foundation of China [21203174, 21221061, 21273219]
- Natural Science Foundation of Jilin Province [20130522141JH, 20150101012JC]
- Department of Science and Technology of Sichuan Province
The electrocatalyst, nitrobenzene molecular doped graphene, for the oxygen reduction reaction (ORR) is investigated by the first-principles calculations. We find that zigzag edge (Z), doped armchair edge (NBA), and the opposite-side edge of doped zigzag nanoribbon (NBZ-2) are three active centers that contribute to the efficient catalytic performance. Our calculations suggest that such excellent electrocatalytic properties originate from the induced high asymmetry spin density and charge redistribution. The calculated onsite potentials are -0.13, -0.43, and -0.11 V for Z, NBA, and NBZ-2, which are close to the experimental values of -0.20 V on NBG and -0.24 V on graphene. We also find that the electrocatalytic activity and the tolerance of methanol depend on the doped configurations. Therefore, the carefully controllable synthesis is highly expected to further improve the ORR activity of nitrobenzene-doped graphene.
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