A Simple Chemical Procedure for Extending the Conductive State of Polypyrrole to More Negative Potentials
Abstract
The electronically conductive polymer polypyrrole is an electronic conductor at potentials positive of ca. -0.4 V vs. the saturated calomel electrode (SCE) and an electronic insulator at potentials negative of this value. As a result of this potential-dependent conductor/insulator transition, a polypyrrole film can be used as an electrode for redox couples with E(o)'s positive of ca. -0.4 V vs. SCE but cannot be used as an electrode for couples with E(o)'s negative of this value. We have discovered a simple chemical procedure that extends the conductive state of polypyrrole to ca. -1.1 V vs. SCE. This procedure entails treating the polypyrrole film with aqueous sodium hydroxide. We demonstrate this extension of the conductive state to more negative potentials in this paper. We also propose, and test, a chemical model that explains the extension of the conductive state
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1993
- Accession Number
- ADA266235
Entities
People
- Charles R. Martin
- Leon S. Van Dyke
- Susumu Kuwabata
Organizations
- Colorado State University