Dhanasekaran, P. and Selvaganesh, S.V. and Shukla, A. and Nagaraju, N. and Bhat, S.D. (2018) Boosting Pt oxygen reduction reaction activity and durability by carbon semi-coated titania nanorods for proton exchange membrane fuel cells. Electrochimica Acta, 263. pp. 596-609. ISSN 0013-4686

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Abstract

We report a simple, scalable approach to improve interfacial characteristics of carbon semi-coated titania nanorods-supported-Pt with superior peak power density as compared to Pt/C with thin metal loading of 150 mg cm�2. Thin layer of carbon coated titania nanorod is synthesized by hydrothermal method. Carbon coated titania nanorods boosts the Pt oxygen reduction reaction activity than carbon. The crystal structure, dispersion of platinum nanoparticles, surface morphology and oxidation state are studied by X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy, respectively. Studies using conventional three electrode setup shows that Pt/CCT-30 retains 48% of initial electrochemical surface area even after 40,000 potential cycles between 0.6 and 1.2 V. The solid fuel cell mode accelerated stress durability studies show that thin layer of carbon coated titania nanorods-Pt (Pt/CCT 30) significantly enhances stability and preserves 75% of initial fuel cell performance even after 10,000 potential cycles between 1 and 1.5 V. In comparison, only 20% of performance is retained for Pt supported on carbon after 3000 cycles

Item Type:	Article
Uncontrolled Keywords:	Hydrothermal method;Oxygen reduction reaction;Fuel cell Durability;Titania nanorods
Subjects:	Fuel Cells Nanotechnology Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	03 Jun 2019 09:42
Last Modified:	03 Jun 2019 09:42
URI:	http://cecri.csircentral.net/id/eprint/3200

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