期刊
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
卷 14, 期 3, 页码 252-263出版社
WORLD SCI PUBL CO INC
DOI: 10.1142/S1088424610001994
关键词
hydrogen peroxide; tetra-amino phthalocyanine; atomic force microscopy; electrochemical impedance spectroscopy; cobalt; manganese
资金
- Department of Science and Technology (DST)
- National Research Foundation (NRF) South Africa through the DST/NRF South African Research Chairs Initiative
- National Research Foundation (NRF) South Africa, Rhodes University
- Mintek and Goldfields
- DST/Mintek Nanotechnology Innovation Centre (NIC)
- DST-RPDP
This work reports the use of metallo tetra-amino phthalocyanines (MTAPc, M = Co and Mn) polymer thin films on gold and glassy carbon electrode surfaces for the detection and monitoring of hydrogen peroxide (H2O2). The polymer-modified electrodes were characterized using electrochemical and microscopic-based methods. Atomic force microscopy (AFM) was used to study the bare and polymer-modified ITO surfaces. The electrocatalytic reduction of H2O2 with glassy carbon polymer-modified electrodes gave higher current densities compared to their gold counterparts. The electroanalytical properties of H2O2 were obtained using a real-time calibration curve of the amperometric determination in pH 7.4 aqueous solution. The limits of detection (LoD) of the polymer-modified electrodes towards electroreduction of H2O2 were of the order of 10(-7) M, with high sensitivity ranging from 6.0-15.4 mA.mM(-1).cm(-2).
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