The morphology dependent electrocatalytic activity of Ir nanostructures towards oxygen reduction

Chakrapani, Kalapu and Sampath, Srinivasan (2014) The morphology dependent electrocatalytic activity of Ir nanostructures towards oxygen reduction. In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 16 (31). pp. 16815-16823.

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Abstract

Iridium nanostructures with different morphologies are synthesized by a simple, environmentally friendly approach in aqueous media under mild conditions. The morphology dependent electrocatalytic activity of Ir nanochains and nanoparticles towards oxygen reduction reaction (ORR) has been demonstrated in both acidic and alkaline media. Comparative electrochemical studies reveal that nanochains exhibit significantly enhanced ORR activities in both acidic and alkaline media as compared with nanoparticles, as a result of the continuous structure of interconnected particles. The mechanism of oxygen reduction on Ir nanostructures predominantly follows a four-electron pathway in alkaline and acidic solutions. Excellent stability and good selectivity towards methanol tolerance are reported.

Item Type:	Journal Article
Publication:	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Publisher:	ROYAL SOC CHEMISTRY
Additional Information:	Copy right for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	04 Sep 2014 11:00
Last Modified:	04 Sep 2014 11:00
URI:	http://eprints.iisc.ac.in/id/eprint/49753

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