Enhanced catalytic activity of ppy-coated pencil electrode in the presence of chitosan and Au nanoparticles for hydrogen evolution reaction

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dc.contributor.authorKayan, Didem Balun
dc.contributor.authorKoçak, Derya
dc.date.accessioned13.07.201910:50:10
dc.date.accessioned2019-07-29T19:28:15Z
dc.date.available13.07.201910:50:10
dc.date.available2019-07-29T19:28:15Z
dc.date.issued2017
dc.departmentSabire Yazıcı Fen Edebiyat Fakültesi
dc.description.abstractCatalytically active and low-cost electrocatalysts for the production of hydrogen from water are extremely important for future renewable energy systems. Here, we report the fabrication of a facile pencil graphite electrode modified with polypyrrole-chitosan/Au nanoparticles and tested its performance for electrocatalytic hydrogen evolution reaction (HER) as a model process. The porous surface of the pencil graphite electrode (PGE) was modified potentiostically by polypyrrole (PPy) at various film thicknesses in the presence of chitosan (Chi), which is a natural biopolymer, in the electrolyte medium. After the optimum film thickness had been obtained, the Au particles electrodeposited on to the PPy/Chi composite film at the nano-scale to benefit both from its well-known high catalytic activity and to reduce the amount of precious metal Au to prepare a low-cost eletrocatalyst. The performance of this composite catalyst on the H+ reduction (H-ad formation) and thereby on the hydrogen evolution was investigated. Data from cyclic voltammetry (CV), Tafel polarization curves, and electrochemical impedance spectroscopy (EIS) demonstrated that the current densities related to the electron transfer rate changed with the thickness of the composite film, and the catalytic activity was enhanced more with deposition small amount of Au on to the catalyst surface.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [TBAG-114Z315]; Scientific Research Projects Coordination Unit of Aksaray University [2015-036]; Science and Technological Application and Research Center of Aksaray University
dc.description.sponsorshipThe authors gratefully acknowledge financial support from The Scientific and Technological Research Council of Turkey (TUBITAK) (Project Number TBAG-114Z315), Scientific Research Projects Coordination Unit of Aksaray University (2015-036) and Science and Technological Application and Research Center of Aksaray University.
dc.identifier.doi10.1007/s10008-017-3605-4
dc.identifier.endpage2798en_US
dc.identifier.issn1432-8488
dc.identifier.issn1433-0768
dc.identifier.issue10en_US
dc.identifier.scopusqualityQ2
dc.identifier.startpage2791en_US
dc.identifier.urihttps://doi.org/10.1007/s10008-017-3605-4
dc.identifier.urihttps://hdl.handle.net/20.500.12451/6010
dc.identifier.volume21en_US
dc.identifier.wosWOS:000410749000004
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofJournal of Solid State Electrochemistry
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectConducting Composite
dc.subjectPencil Graphite
dc.subjectChitosan
dc.subjectAu Nanoparticles
dc.subjectHydrogen Evolution Reaction
dc.titleEnhanced catalytic activity of ppy-coated pencil electrode in the presence of chitosan and Au nanoparticles for hydrogen evolution reaction
dc.typeArticle

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