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Microporous N,P‐Codoped Graphitic Nanosheets as an Efficient Electrocatalyst for Oxygen Reduction in Whole pH Range for Energy Conversion and Biosensing Dissolved Oxygen
Author(s) -
Lin Deqing,
Hu Chuangang,
Chen Hao,
Qu Jia,
Dai Liming
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201802040
Subject(s) - electrocatalyst , conjugated microporous polymer , microporous material , overpotential , biocompatibility , biosensor , oxygen , chemistry , nuclear chemistry , materials science , inorganic chemistry , chemical engineering , electrochemistry , nanotechnology , electrode , organic chemistry , engineering
Microporous N,P‐codoped graphitic nanosheets (N,P‐CMP‐1000) were synthesized by thermal annealing (1000 °C) of as‐synthesized conjugated microporous polymers (CMPs) in the presence of phytic acid, which can be used as an effective metal‐free electrocatalyst for the oxygen reduction reaction (ORR) for energy conversion. In the whole pH range (i.e. alkaline, acidic, and neutral solutions), the obtained N,P‐CMP‐1000 exhibits superior electrocatalytic activity for ORR with a low overpotential, high current density, and good stability. Furthermore, N,P‐CMP‐1000 can also be applied for electrochemically sensing dissolved oxygen (DO), with a high sensitivity (1.89 μA mg −1 L) and broad detection range (2.56 to 16.65 mg L −1 ) due to its good electrocatalytic performance towards ORR in neutral solution. In vitro cytotoxicity tests (CCK‐8 and Live/Dead Cell Double Staining Assay) of N,P‐CMP‐1000 extracts demonstrated its good biocompatibility to Human Corneal Epithelial Cells (HCEC), which shows its great potential as an eye‐wearable biosensor for sensing DO in tears.