Anandha ganesh, P. and Jeyakumar, D. (2018) Hierarchical approach of mitigating carbon influence in nano-porous electro-catalyst with unique surface islands for efficient methanol resistive oxygen reduction. Electrochimica Acta, 262. pp. 306-318. ISSN 0013-4696

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Abstract

For the first time, we report a facile one pot aqueous method for support-free Pd85Pt15 nano-porous structures (NPoS) synthesis from PdMn nano-alloys at ambient conditions. A hierarchical approach was successfully employed through a simple “self-settlement” process with descending amounts of carbon to carbon-free electro-catalysts to improve catalyst utilization and avoid carbon degradation during fuel cell operating conditions. Pd85Pt15 NPoS exhibits enhanced methanol resistive oxygen reduction reaction (ORR) activity owing to the presence of highly active and unique surface PdPt islands compared to HiSPEC Pt/C catalysts. Accelerated durability tests of the support-free PdPt NPoS show enhanced durability in harsh acidic environment (1.0 N H2SO4) compared to HiSPEC Pt/C and DOE 2017 e2020 durability target. Preliminary direct methanol fuel cell studies using hierarchically derived Pd85Pt15 NPoS variants were performed at ultra-low Pt content. The effects of carbon content and catalyst layer thickness on fuel cell activities are well discussed

Item Type:	Article
Uncontrolled Keywords:	Nano-porous surface;Surface-active Pd-Pt islands;Methanol tolerant; oxygen reduction reaction;Direct methanol fuel cell;Support-free ORR catalysts
Subjects:	Electrodics and Electrocatalysis Electrochemical Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	03 Jun 2019 09:12
Last Modified:	03 Jun 2019 09:12
URI:	http://cecri.csircentral.net/id/eprint/3243

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