Nanocomposite Prepared from In Situ Grafting of Polypyrrole to Aminobenzoyl-Functionalized Multiwalled Carbon Nanotube and Its Electrochemical Properties
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- Nanocomposite Prepared from In Situ Grafting of Polypyrrole to Aminobenzoyl-Functionalized Multiwalled Carbon Nanotube and Its Electrochemical Properties
- Jeon, In-Yup; Choi, Hyun-Jung; Tan, Loon-Seng; Baek, Jong-Beom
- 4-aminobenzoic acid; Alkaline treatment; Ammonium persulfate; Covalent link; Cycle stability; De-doping; Electrical conductivity; Electrocatalytic activity; Electron transfer; Friedel-crafts acylation; Functionalizations; grafting; Homopolymers; Hydrochloric acid solution; In-situ; Multi-walled; Oxygen reduction reaction; Polyphosphoric acids
- Issue Date
- JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.49, no.12, pp.2529 - 2537
- 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 (PPA)/phosphorous 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 (APS)/aqueous 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).
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