DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Article >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/14109

Title: Carbon-supported Pd-Fe electrocatalysts for oxygen reduction reaction (ORR) and their methanol tolerance
Authors: NEERGAT, M
GUNASEKAR, V
RAHUL, R
Keywords: SCANNING ELECTROCHEMICAL MICROSCOPY
PALLADIUM ALLOY ELECTROCATALYSTS
TEMPERATURE FUEL-CELLS
SURFACE-AREA
THERMODYNAMIC GUIDELINES
BIMETALLIC CATALYSTS
TRANSITION-METALS
DISK ELECTRODE
O-2 REDUCTION
CO
Issue Date: 2011
Publisher: ELSEVIER SCIENCE SA
Citation: JOURNAL OF ELECTROANALYTICAL CHEMISTRY,658(1-2)25-32
Abstract: Carbon-supported palladium-iron bimetallic electrocatalysts of different Pd to Fe ratios (1:1, 2:1, 3:1) were prepared by a low temperature single step co-reduction method in alkaline media without any stabilizing agents. The physical characterizations of catalysts were done using XRD and TEM. The electrochemical characterizations were done using underpotential deposition (upd) of hydrogen and copper. Electrocatalytic activities for oxygen reduction reaction (ORR) were investigated and compared to that of standard Pt/C catalyst. The carbon-supported Pd-Fe bimetallic catalysts showed higher surface area than that of pure Pd/C. The half-wave potential of ORR on as-prepared palladium-iron bimetallic catalysts was shifted positively by similar to 75-100 mV from that of Pd/C in oxygen saturated 0.1 M HClO(4) solution. The highest catalytic activity was obtained with Pd(3)Fe/C - catalyst and it was close to that of standard Pt/C. XRD analysis did not show any noticeable shift in peak position due to alloying. In presence of methanol, carbon-supported Pd and Pd-Fe bimetallic catalysts showed superior ORR selectivity and activity unlike Pt/C. The peroxide generation on Pd(3)Fe/C - the best of Pd based electrocatalyst - was comparable to that on Pt/C. These catalysts, prepared at low temperature and without any further heat-treatment, gave activities that were free from effects of crystallite size, segregation, and enrichment of precious metal content that might happen at high temperature. (C) 2011 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jelechem.2011.04.016
http://dspace.library.iitb.ac.in/jspui/handle/100/14109
ISSN: 1572-6657
Appears in Collections:Article

Files in This Item:

There are no files associated with this item.

View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback