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Overoxidized Polypyrrole/Cobalt Tetrasulfonated Phthalocyanine Modified Ultramicro‐Carbon‐Fiber Electrodes for the Electrooxidation of 2‐Mercaptoethanol
Author(s) -
Gulppi Miguel,
Bedioui Fethi,
Zagal José H.
Publication year - 2001
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200109)13:13<1136::aid-elan1136>3.0.co;2-#
Subject(s) - polypyrrole , cobalt , phthalocyanine , inorganic chemistry , chemistry , electrode , materials science , electrochemistry , organic chemistry
We report on the catalytic electrooxidation of 2‐mercaptoethanol on ultramicro‐carbon‐fiber electrode (UMCF) modified with overoxidized polypyrrole‐doped cobalt‐tetrasulfonated phthalocyanine (CoTSPc) film. The easily prepared electrodes are stable and do not passivate after repetitive use. The sensitivity of the modified UMCF electrode towards the amperometric detection of 2‐mercaptoethanol was tested with differential pulse voltammetry (DPV) and differential normal pulse amperometry (DNPA). A calculated detection limit as low as 8×10 −5 M was obtained by DPV. Our results show that UMCF electrodes are promising for the detection of low concentrations of thiols as mass transport limitations are minimized.