Accession Number:

ADA571110

Title:

Nanocomposite Prepared from In Situ Grafting of Polypyrrole to Aminobenzoyl-Functionalized Multiwalled Carbon Nanotube and Its Electrochemical Properties

Descriptive Note:

Journal article

Corporate Author:

ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY (KOREA SOUTH)

Report Date:

2011-01-01

Pagination or Media Count:

10.0

Abstract:

We reported the functionalization of multiwalled carbon nanotube MWCNT with 4-aminobenzoic acid by a direct Friedel-Crafts acylation reaction in a mild polyphosphoric acid PPAphosphorous pentoxide P2O5 medium. The resulting 4- aminobenzoyl-functionalized MWCNT AF-MWCNT was used as a platform for the grafting of polypyrrole PPy in ammonium persulfate APSaqueous hydrochloric acid solution to produce PPy-grafted MWCNT PPy-g-MWCNT composite. After dedoping with alkaline treatment, PPy-g-MWCNT displayed 20 times higher electrical conductivity than that of PPy. The current density and cycle stability of PPy-g-MWCNT composite were also remarkably improved compared with those of PPy homopolymer, suggesting that an efficient electron transfer between PPy and MWCNT was possible through covalent links. In addition, PPy-g-MWCNT displayed high electrocatalytic activity for oxygen reduction reaction ORR.

Subject Categories:

  • Refractory Fibers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE