Journal
ELECTROCHIMICA ACTA
Volume 231, Issue -, Pages 557-564Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.02.099
Keywords
Heteroatom-doped graphene; Phosphorus doping; Defect-engineering; Dopamine detection; Electrochemical sensor
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Funding
- National Science Foundation of China [51501083]
- Gansu Provincial Science and Technology Department Fund [1606RJZA097]
- Gansu Provincial Education Department Fund [2015A-061]
- Lanzhou Jiaotong University Youth Fund [2014015]
- Science and Technology Department of Hebei Province Projects [152111230]
- Health Department of Hebei Province Project [20160030]
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Heteroatom-doped graphene materials emerged as promising metal-free catalysts have recently attracted a growing interest in electrochemical sensing applications. However, their catalytic activity and sensing performances still need to be further improved. Herein, we reported the development of unique phosphorus (P)-doped and plasma-etched graphene (denoted as PG-E) as an efficient metal-free electrocatalyst for dopamine (DA) sensing. It was demonstrated that introducing both P-dopants and plasma-engineered defects in graphene could synergistically improve the activity toward electrocatalytic oxidation of DA by increasing the accessible active sites and promoting the electron transport capability. The resulting PG-E modified electrode showed exceptional DA sensing performances with low detection limit, high selectivity and good stability. These results suggested that the synergistic effect of dopants and defects might be an important factor for developing the advanced graphene-based metal-free catalysts for electrochemical sensing. (C) 2017 Elsevier Ltd. All rights reserved.
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