Molecular fluorinated cobalt phthalocyanine immobilized on ordered mesoporous carbon as an electrochemical sensing platform for sensitive detection of hydrogen peroxide and hydrazine in alkaline medium

[Display omitted] •Molecular CoPcF16 is anchored on CMK-3.•The interaction between CoPcF16 and CMK-3 is investigated.•CMK-3-CoPcF16 exhibits high electrocatalytic activity.•Sensitive detection of H2O2 and hydrazine is achieved. Non-precious molecular cobalt phthalocyanine (CoPc) complexes have been...

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Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2022-02, Vol.906, p.116019, Article 116019
Main Authors: Yuan, Baiqing, Sun, Peng, Fernandez, Carlos, Wang, Hemin, Guan, Peiyu, Xu, Hui, Niu, Yuzhong
Format: Article
Language:English
Subjects:
Carbon
Cobalt
Electrocatalysts
Electrochemical impedance spectroscopy
Electrochemical sensors
Electron microscopy
Fluorinated cobalt phthalocyanine
Fluorination
Fluorine
Hydrazine
Hydrazines
Hydrogen peroxide
Hydrogen peroxide (H2O2)
Microscopy
Ordered mesoporous carbon
Oxidation
Paramagnetic resonance
Photoelectrons
Spectrum analysis
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Summary:[Display omitted] •Molecular CoPcF16 is anchored on CMK-3.•The interaction between CoPcF16 and CMK-3 is investigated.•CMK-3-CoPcF16 exhibits high electrocatalytic activity.•Sensitive detection of H2O2 and hydrazine is achieved. Non-precious molecular cobalt phthalocyanine (CoPc) complexes have been considered to be promising electrocatalysts due to diversity of substituents and carbon supporting matrixes. Here, we report a highly dispersed fluorinated CoPc (CoPcF16) molecule electrocatalyst immobilized in ordered mesoporous carbon CMK-3 (CMK-3-CoPcF16) via π-π interaction. The molecular electrocatalyst is characterized by X-ray photoelectron spectroscopy, Raman spectrum, electronic paramagnetic resonance, scanning electron microscopy, transmission electron microscopy and electrochemicalimpedance spectroscopy. The combination of fluorine substituents and high loading capability of CMK-3 increase the solubility of CoPc, suppress aggregation, and thereby enhance the electrocatalytic performance. As a result, the CMK-3-CoPcF16 modified electrode shows high electrocatalytic activity towards the oxidation of hydrogen peroxide and hydrazine. CMK-3-CoPcF16 hybrid is successfully presented as an electrochemical sensing platform for sensitive detection of H2O2 and hydrazine with a detection limit of 0.03 and 0.2 µM, respectively.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2022.116019