Spectroelectrochemical investigation of redox states in a polypyrrole/lignin composite electrode material
2015 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 3, no 24, 12927-12937 p.Article in journal (Refereed) Published
We report spectroelectrochemical studies to investigate the charge storage mechanism of composite polypyrrole/lignin electrodes. Renewable bioorganic electrode materials were produced by electropolymerization of pyrrole in the presence of a water-soluble lignin derivative acting as a dopant. The resulting composite exhibited enhanced charge storage abilities due to a lignin-based faradaic process, which was expressed after repeated electrochemical redox of the material. The in situ FTIR spectroelectrochemistry results show the formation of quinone groups, and reversible oxidation-reduction of these groups during charge-discharge experiments in the electrode materials. The most significant IR bands include carbonyl absorption near 1705 cm(-1), which is attributed to the creation of quinone moieties during oxidation, and absorption at 1045 cm(-1) which is due to hydroquinone moieties.
Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2015. Vol. 3, no 24, 12927-12937 p.
IdentifiersURN: urn:nbn:se:liu:diva-120069DOI: 10.1039/c5ta00788gISI: 000356022800044OAI: oai:DiVA.org:liu-120069DiVA: diva2:839931
Funding Agencies|Knut and Alice Wallenberg foundation; Marie Curie network Renaissance; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009-00971]2015-07-062015-07-062015-08-18