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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/20764
Title: Oxygen reduction reaction catalyzed by platinum nanonetwork prepared by template free one step synthesis for polymer electrolyte membrane fuel cells
Authors: Narayanamoorthy B.
Kumar, B. V.V.S.Pavan
Eswaramoorthy M.
Balaji S.
Published in: Materials Research Bulletin
Abstract: The reduction reaction of molecular oxygen (ORR) was investigated using supportless Pt nanonetwork (Pt NN) electrocatalyst in sulfuric acid medium. Pt NN was prepared by template free borohydride reduction. The transmission electron microscope images revealed a network like nano-architecture having an average cluster size of 30 nm. The electrochemical characterization of supportless and Vulcan carbon supported Pt NN (Pt NN/VC) was carried out using rotating disc and ring disc electrodes at various temperatures. Kinetic and thermodynamic parameters were estimated under hydrodynamic conditions and compared with Pt NN/VC and reported Pt/C catalysts. The accelerated durability test revealed that supportless Pt NN is quite stable for 5000 potential cycles with 22% reduction in electrochemical surface area (ECSA). While the initial limiting current density has in fact increased by 11.6%, whereas Pt NN/VC suffered nearly 55% loss in ECSA and 13% loss in limiting current density confirming an enhanced stability of supportless Pt NN morphology for ORR compared to conventional Pt/C ORR catalysts in acid medium. © 2014 Elsevier Ltd.
Citation: Materials Research Bulletin, 55: 137-145
URI: https://doi.org/10.1016/j.materresbull.2014.04.005
http://repository.iitr.ac.in/handle/123456789/20764
Issue Date: 2014
Publisher: Elsevier Ltd
Keywords: Catalytic properties
Electrochemical measurements
Nanostructures
Sol-gel chemistry
Transmission electron microscopy
ISSN: 255408
Author Scopus IDs: 57211391199
55266247800
55983367600
57195988277
Author Affiliations: Narayanamoorthy, B., Department of Chemistry, Faculty of Science, Sri Chandrasekharendra Saraswathi Viswa Mahavidyalaya (SCSVMV University), Enathur, Kanchipuram 631561, India
Kumar, B.V.V.S.P., Nanomaterials and Catalysis Lab, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bangalore 560 064, India
Eswaramoorthy, M., Nanomaterials and Catalysis Lab, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bangalore 560 064, India
Balaji, S., Department of Chemistry, Faculty of Science, Sri Chandrasekharendra Saraswathi Viswa Mahavidyalaya (SCSVMV University), Enathur, Kanchipuram 631561, India
Funding Details: Financial support from the Board of Research in Nuclear Sciences (BRNS) , Department of Atomic Energy (DAE), bearing reference No. 2009/37/29/BRNS, Government of India is acknowledged. S.B. thanks the SCSVMV University for in-house facilities and B.N. thanks the BRNS for the award of SRF. Department of Atomic Energy, Government of India, पऊवि: 2009/37/29/BRNS; Board of Research in Nuclear Sciences, BRNS
Corresponding Author: Balaji, S.; Department of Chemistry, Faculty of Science, Sri Chandrasekharendra Saraswathi Viswa Mahavidyalaya (SCSVMV University), Enathur, Kanchipuram 631561, India; email: prof.balaji13@gmail.com
Appears in Collections:Journal Publications [CY]

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