Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/91722
Title: Study of overoxidized polypyrrole using X-ray photoelectron spectroscopy
Authors: Ge, H.
Qi, G.
Kang, E.-T. 
Neoh, K.G. 
Keywords: overoxidation
polypyrrole
X.p.s.
Issue Date: Feb-1994
Source: Ge, H.,Qi, G.,Kang, E.-T.,Neoh, K.G. (1994-02). Study of overoxidized polypyrrole using X-ray photoelectron spectroscopy. Polymer 35 (3) : 504-508. ScholarBank@NUS Repository.
Abstract: Overoxidation of polypyrrole was carried out electrochemically and studied by X-ray photoelectron spectroscopy. It is shown that overoxidation starts on the polymer adjacent to the electrode and then advances to the polymer facing solution. During overoxidation, original positive charges on polypyrrole (-NH+-) are mostly replaced by -NH-, accompanied by the loss of counterions. Overoxidation progresses in two steps. Carbons are oxidized into COH in the first step and into CO in the second step. Changing the pH of the media and increasing the potential have no significant effects on the degree of overoxidation in the range studied. © 1994.
Source Title: Polymer
URI: http://scholarbank.nus.edu.sg/handle/10635/91722
ISSN: 00323861
Appears in Collections:Staff Publications

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