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Enhanced Electrocatalytic Performance of Anthraquinonemonosulfonate‐Doped Polypyrrole Composite: Electroanalysis for the Specific Roles of Anthraquinone Derivative and Polypyrrole Layer on Oxygen Reduction Reaction
Author(s) -
Zhao Sha,
Zhang Guoquan,
Fu Lei,
Liu Lifen,
Fang Xiaohong,
Yang Fenglin
Publication year - 2011
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/elan.201000236
Subject(s) - polypyrrole , anthraquinone , chemistry , oxygen , oxygen reduction reaction , electrocatalyst , electrode , inorganic chemistry , electrochemistry , organic chemistry
To analyze the specific roles of anthraquinone‐2‐sulfonate (AQS) and polypyrrole (PPy) layer on oxygen reduction reaction (ORR), the electrocatalytic reduction of oxygen was investigated on the AQS/PPy composite modified graphite electrode. Results show that the enhanced electrocatalytic performance is attributed to the excellent electrocatalytic activity of the immobilized AQS functional groups to mediate two‐electron reduction of O 2 to H 2 O 2 . The PPy layer may not participate in ORR, but it can further catalyze the two‐electron reduction of H 2 O 2 to produce H 2 O in the potential range more negative than that the two‐electron reduction of oxygen proceeds efficiently on the AQS sites.