Polyaniline doped with various inorganic acids and polymeric acids as platinum catalyst support for methanol electro-oxidation

Chung Wen Kuo, Ping Lin Kuo, Ko Shan Ho, Tar Hwa Hsieh, Sin Jhih Chen, Tzi Yi Wu, Yu Chang Huang

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22 Citations (Scopus)

Abstract

Polyaniline (PANI) is doped with H 2 SO 4 , HCl, poly(acrylic acid) (PAA), poly(acrylic acid-co-maleic acid) (PAMA), PAA+HCl, and poly(styrenesulfonic acid) (PSS) to obtain PANI-H 2 SO 4 , PANI-HCl, PANI-PAA, PANI-PAMA, PANI-(PAA+HCl), and PANI-PSS films, respectively. Ultraviolet-visible (UV-Vis) and Fourier transform infrared (FT-IR) spectroscopy result confirm that PANI is doped with PSS. X-ray photoelectron spectroscopy (XPS) results indicate that the nitrogen atoms of PANI-PSS are the most positively charged in these films. Scanning electron microscopy (SEM) images reveal that these films are composed of highly porous nanowires. Platinum (Pt) can be incorporated into PANI-H 2 SO 4 , PANI-HCl, PANI-PAA, PANI-PAMA, PANI-(PAA+HCl), and PANI-PSS films via electrochemical deposition to obtain PANI-H 2 SO 4 -Pt, PANI-HCl-Pt, PANI-PAA-Pt, PANI-PAMA-Pt, PANI-(PAA+HCl)-Pt, and PANI-PSS-Pt composite electrodes, respectively. Auger electron spectroscopy (AES) results indicate that Pt particles dispersemore uniformly into the spatial regions of PANI-PSS and PANI-(PAA+HCl) than those of other films. The PANI-PSS-Pt electrode provides the most active surface area of Pt in these electrodes. Cyclic voltammetry results and chronoamperometric response measurements show that the activity and stability towardmethanol oxidation of the PANI-PSS-Pt electrode are the best in these electrodes.

Original languageEnglish
Pages (from-to)1294-1302
Number of pages9
JournalJournal of the Chinese Chemical Society
Volume59
Issue number10
DOIs
Publication statusPublished - 2012 Oct 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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