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Controllable Deposition of a Platinum Nanoparticle Ensemble on a Polyaniline/Graphene Hybrid as a Novel Electrode Material for Electrochemical Sensing
Author(s) -
Qiu JianDing,
Shi Ling,
Liang RuPing,
Wang GuoChong,
Xia XingHua
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201200258
Subject(s) - polyaniline , materials science , graphene , electrode , polymerization , conductive polymer , chemical engineering , x ray photoelectron spectroscopy , nanoparticle , platinum nanoparticles , thermogravimetric analysis , electrochemistry , nanotechnology , polymer , composite material , chemistry , engineering
We demonstrate for the first time an interfacial polymerization method for the synthesis of high‐quality polyaniline‐modified graphene nanosheets (PANI/GNs), which represents a novel type of graphene/polymer heterostructure. The interfacial polymerization at a liquid–liquid interface allows PANI to grow uniformly on the surface of the GNs. An ultra‐high loading of Pt nanoparticles was then controllably deposited on the surface of the PANI/GNs to form a Pt/PANI/GNs hybrid. The obtained composites were characterized by scanning electron microscopy, transmission electron microscopy, energy‐dispersive spectrometry, X‐ray diffraction, X‐ray photoelectron spectroscopy, and thermogravimetric analysis. The Pt/PANI/GNs hybrid shows excellent electrocatalytic activity toward methanol oxidation and oxygen reduction. H 2 O 2 and glucose were used as two representative analytes to demonstrate the sensing performance of a Pt/PANI/GNs‐modified electrode. It is found that this sensing element shows high sensitivity and a low detection limit for H 2 O 2 and glucose. The results demonstrate that the Pt/PANI/GNs hybrid may be an attractive and advanced electrode material with potential applications in the construction of electrochemical sensors and biosensors.