Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/2170
Title: Pd-Pt alloys nanowires as support-less electrocatalyst with high synergistic enhancement in efficiency for methanol oxidation in acidic medium
Authors: Rana, Moumita
Patil, Pramod K.
Chhetri, Manjeet
Dileep, K.
Datta, Ranjan
Gautam, Ujjal K.
Keywords: Chemistry
Metal nanowires
Galvanic displacement
Electrocatalysis
Methanol oxidation
DMFC
Membrane Fuel-Cells
Ethanol Oxidation
Facile Synthesis
Hollow Nanostructures
Excellent Platform
Oxygen Reduction
Alkaline-Medium
Platinum
Catalysts
Electrooxidation
Issue Date: 2016
Publisher: Academic Press Inc Elsevier Science
Citation: Rana, M.; Patil, P. K.; Chhetri, M.; Dileep, K.; Datta, R.; Gautam, U. K., Pd-Pt alloys nanowires as support-less electrocatalyst with high synergistic enhancement in efficiency for methanol oxidation in acidic medium. Journal of Colloid and Interface Science 2016, 463, 99-106 http://dx.doi.org/10.1016/j.jcis.2015.10.042
Journal of Colloid and Interface Science
463
Abstract: In a facile approach, Pd73Pt27 alloy nanowires (NWs) with large aspect ratios were synthesized in high yield by using sacrificial templates. Unlike majority of processes, our synthesis was carried out in aqueous solution with no intermittent separating stages for the products, while maintaining the NW morphology up to similar to 30% of Pt. Upon evaporation of their dispersion, the NWs transform into a stable porous membrane due to self-entanglement and can be directly lifted and employed for electrocatalytic applications without external catalyst supports. We show that the NW membranes exhibit efficient electrocatalytic performance for methanol oxidation reaction (MOR) with 10 times higher mass activity and 4.4 times higher specific activity in acidic media as compared to commercial Pt catalysts. The membrane electrocatalysts is robust and exhibited very good stability with retention of similar to 70% mass-activity after 4000 potential cycles. Since Pd was found to be inert towards MOR in acidic medium, our investigation provides a direct estimate of synergistic enhancement of efficiency. Over 10 times increment of mass activity appears to be significantly higher than previous investigations in various other reaction media. (C) 2015 Elsevier Inc. All rights reserved.
Description: Restricted Access
URI: http://hdl.handle.net/10572/2170
ISSN: 0021-9797
Appears in Collections:Research Articles (Ranjan Datta)

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