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Cyclic Voltammetrically Prepared MnO 2 ‐Polyaniline Composite and Its Electrocatalysis for Oxygen Reduction Reaction (ORR)
Author(s) -
Ding KeQiang
Publication year - 2009
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200900132
Subject(s) - chemistry , polyaniline , cyclic voltammetry , aniline , electrocatalyst , composite number , manganese , fourier transform infrared spectroscopy , catalysis , inorganic chemistry , electrochemistry , chemical engineering , electrode , nuclear chemistry , organic chemistry , polymer , composite material , polymerization , materials science , engineering
The composite of manganese dioxide‐polyaniline (MnO 2 ‐PANI) was successfully prepared by cyclic voltammetry (CV) from a 0.5 M H 2 SO 4 solution containing 0.2 M aniline and 0.5 M MnSO 4 . Scanning electron microscopy (SEM) images revealed that cauliflower like manganese dioxides entangled with PANI were generated. The spectra obtained from UV‐vis spectrophotometry (UV‐vis) and Fourier transform infrared spectrometry (FTIR) strongly demonstrated that this novel composite was composed by MnO 2 and PANI, and also there was an interaction between MnO 2 and PANI. Then, for the first time, this resultant composite was modified on a graphite electrode and employed in the oxygen reduction reaction (ORR), subsequently, the obtained cyclic voltammograms (CVs) verified that ORR could proceed on this resultant composite of MnO 2 ‐PANI. Lastly, the possible catalysis mechanism of MnO 2 ‐PANI towards ORR was proposed based on the results we acquired. Developing a novel substrate on which ORR could proceed is the main contribution of this work.