Sivakumar, C. (2007) Finely dispersed Pt nanoparticles in conducting poly(o-anisidine)nanofibrillar matrix as electrocatalytic material. Electrochimica Acta, 52. pp. 4182-4190. ISSN 0013-4686

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Abstract

A new approach based on stepwise oxidation of o-anisidine is explored for generating nanoporous films of poly(o-anisidine), POA and loading of Pt nanoparticles that are subsequently used for electrocatalysis of methanol oxidation are presented and compared with bulk Pt. POA film can easily be prepared by stepwise electro-oxidation procedure with very high porosity consisting of nanofibrillar structure using without templates. Controlled sizes of Pt nanoparticles were entrapped into POA matrix by a two-step process in which first PtCl6 2− ions are sorbed into the pores of polymer matrix followed by electroreduction at −0.55V in a 0.5M H2SO4 solution. Loading of Pt nanoparticles (10–200 �g/cm2) onto POA matrix were accomplished by varying the concentration (2–10 mM) of the sorbate, i.e., H2PtCl6. The sizes of the Pt nanoparticles were determined from TEM analysis and Pt particles were found to be in the range of 10–20 nm. The crystallite phase of Pt particles in POA was examined from XRD pattern. AFM image further supports Pt particles embedded in POA matrix.

Item Type:	Article
Uncontrolled Keywords:	Nanofibrillar POA; Pt nanoparticles; Electrocatalysis; TEM; XRD; AFM
Subjects:	Nanotechnology
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	26 Mar 2012 17:41
Last Modified:	26 Mar 2012 17:41
URI:	http://cecri.csircentral.net/id/eprint/644

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