Studies of In-situ Raman Spectroscopy on Deprotonation and Degeneration of PPY Films

Authors

Jinsong Gao, State Key Laboratory for Physical Chemistry of Solid Surface,Department of Chemistry,Xiamen University,Xiamen University,Xiamen 361005)1)(Department of Chemistry, Nanjing University,Nanjing 210093;
Jing Chen, State Key Laboratory for Physical Chemistry of Solid Surface,Department of Chemistry,Xiamen University,Xiamen University,Xiamen 361005)1)(Department of Chemistry, Nanjing University,Nanjing 210093;
Yanzhen Chen, State Key Laboratory for Physical Chemistry of Solid Surface,Department of Chemistry,Xiamen University,Xiamen University,Xiamen 361005)1)(Department of Chemistry, Nanjing University,Nanjing 210093;
Qi Xue, State Key Laboratory for Physical Chemistry of Solid Surface,Department of Chemistry,Xiamen University,Xiamen University,Xiamen 361005)1)(Department of Chemistry, Nanjing University,Nanjing 210093;
Zhongqun Tian, State Key Laboratory for Physical Chemistry of Solid Surface,Department of Chemistry,Xiamen University,Xiamen University,Xiamen 361005)1)(Department of Chemistry, Nanjing University,Nanjing 210093;

Abstract

By combining the in-situ Raman spectroscopic technique with the normalelectrochemical measurements ,the behavior and structure of PPY films in neutral or basic solutionswere studied.The oxidized PPY loses protons on the N atoms of pyrrole rings and is deprotonated inthese solutions ,resulting the formation of the quinoid structure. It makes the C=C stretching vibrationbonds of PPY split.Because this quinoid structure can′t be further oxidized ,the PPY becomes moredifficult to be oxidized and less reversible with the increasing of pH value of solutions and the degree ofdeprotonation of PPY. In the strong basic solution ( pH=13),the PPY film is degenerated in thepotential region more positive than O V. The degeneration may be related to the damage of the pyrrolering structure of PPY.

Keywords

In-situ Rarman spectroscopy, Polypyrrole, Deprotonation

DOI Link

https://doi.org/10.61558/2993-074X.1309

Publication Date

1995-11-28

Online Available Date

1995-11-28

Revised Date

1995-11-28

Received Date

1995-11-28

Recommended Citation

Jinsong Gao, Jing Chen, Yanzhen Chen, Qi Xue, Zhongqun Tian. Studies of In-situ Raman Spectroscopy on Deprotonation and Degeneration of PPY Films[J]. Journal of Electrochemistry, 1995 , 1(4): 389-396.
DOI: 10.61558/2993-074X.1309
Available at: https://jelectrochem.xmu.edu.cn/journal/vol1/iss4/2

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