Palladium nanoparticles anchored on graphene nanosheets: Methanol, ethanol oxidation reactions and their kinetic studies

Handle URI:
http://hdl.handle.net/10754/563879
Title:
Palladium nanoparticles anchored on graphene nanosheets: Methanol, ethanol oxidation reactions and their kinetic studies
Authors:
Nagaraju, Doddahalli H.; Devaraj, Sappani; Balaya, Palani
Abstract:
Palladium nanoparticles decorated graphene (Gra/Pd nanocomposite) was synthesized by simultaneous chemical reduction of graphene oxide and palladium salt in a single step. The negatively charged graphene oxide (GO) facilitates uniform distribution of Pd2+ ions onto its surface. The subsequent reduction by hydrazine hydrate provides well dispersed Pd nanoparticles decorated graphene. Different amount of Pd nanoparticles on graphene was synthesized by changing the volume to weight ratio of GO to PdCl2. X-ray diffraction studies showed FCC lattice of Pd with predominant (1 1 1) plane. SEM and TEM studies revealed that thin graphene nanosheets are decorated by Pd nanoparticles. Raman spectroscopic studies revealed the presence of graphene nanosheets. The electro-catalytic activity of Gra/Pd nanocomposites toward methanol and ethanol oxidation in alkaline medium was evaluated by cyclic voltammetric studies. 1:1 Gra/Pd nanocomposite exhibited good electro-catalytic activity and efficient electron transfer. The kinetics of electron transfer was studied using chronoamperometry. Improved electro-catalytic activity of 1:1 Gra/Pd nanocomposite toward alcohol oxidation makes it as a potential anode for the alcohol fuel cells. © 2014 Elsevier Ltd.
KAUST Department:
Materials Science and Engineering Program
Publisher:
Elsevier BV
Journal:
Materials Research Bulletin
Issue Date:
Dec-2014
DOI:
10.1016/j.materresbull.2014.08.027
Type:
Article
ISSN:
00255408
Sponsors:
Authors gratefully acknowledge financial support (R-265-000-345-232; R-265-000-345-646) by MINDEF and NUS. We also thank IMRE, Singapore for Raman spectral studies.
Appears in Collections:
Articles; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorNagaraju, Doddahalli H.en
dc.contributor.authorDevaraj, Sappanien
dc.contributor.authorBalaya, Palanien
dc.date.accessioned2015-08-03T12:18:04Zen
dc.date.available2015-08-03T12:18:04Zen
dc.date.issued2014-12en
dc.identifier.issn00255408en
dc.identifier.doi10.1016/j.materresbull.2014.08.027en
dc.identifier.urihttp://hdl.handle.net/10754/563879en
dc.description.abstractPalladium nanoparticles decorated graphene (Gra/Pd nanocomposite) was synthesized by simultaneous chemical reduction of graphene oxide and palladium salt in a single step. The negatively charged graphene oxide (GO) facilitates uniform distribution of Pd2+ ions onto its surface. The subsequent reduction by hydrazine hydrate provides well dispersed Pd nanoparticles decorated graphene. Different amount of Pd nanoparticles on graphene was synthesized by changing the volume to weight ratio of GO to PdCl2. X-ray diffraction studies showed FCC lattice of Pd with predominant (1 1 1) plane. SEM and TEM studies revealed that thin graphene nanosheets are decorated by Pd nanoparticles. Raman spectroscopic studies revealed the presence of graphene nanosheets. The electro-catalytic activity of Gra/Pd nanocomposites toward methanol and ethanol oxidation in alkaline medium was evaluated by cyclic voltammetric studies. 1:1 Gra/Pd nanocomposite exhibited good electro-catalytic activity and efficient electron transfer. The kinetics of electron transfer was studied using chronoamperometry. Improved electro-catalytic activity of 1:1 Gra/Pd nanocomposite toward alcohol oxidation makes it as a potential anode for the alcohol fuel cells. © 2014 Elsevier Ltd.en
dc.description.sponsorshipAuthors gratefully acknowledge financial support (R-265-000-345-232; R-265-000-345-646) by MINDEF and NUS. We also thank IMRE, Singapore for Raman spectral studies.en
dc.publisherElsevier BVen
dc.subjectA.en
dc.subjectA. Metalsen
dc.subjectBen
dc.subjectCatalytic propertiesen
dc.subjectChemical synthesisen
dc.subjectDen
dc.subjectElectrochemical propertiesen
dc.subjectNanostructuresen
dc.titlePalladium nanoparticles anchored on graphene nanosheets: Methanol, ethanol oxidation reactions and their kinetic studiesen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalMaterials Research Bulletinen
dc.contributor.institutionDepartment of Mechanical Engineering, 117 576, Singapore, Singaporeen
dc.contributor.institutionSchool of Chemical and Biotechnology, SASTRA University, Thanjavur 613 401, Indiaen
dc.contributor.institutionNational University of Singapore, Engineering Science Programme, Faculty of Engineering, #04-23 Engineering Drive, Singapore 117574, Singaporeen
kaust.authorNagaraju, Doddahalli H.en
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