Electrochemically deposited Cu2O cubic particles on boron doped diamond substrate as efficient photocathode for solar hydrogen generation

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dc.check.date2019-02-21
dc.check.infoAccess to this item is restricted until 24 months after publication by the request of the publisher.en
dc.contributor.authorMavrokefalos, Christos K.
dc.contributor.authorHasan, Maksudul
dc.contributor.authorRohan, James F.
dc.contributor.authorCompton, Richard G.
dc.contributor.authorFoord, John S.
dc.contributor.funderIrish Research Councilen
dc.contributor.funderH2020 Marie Skłodowska-Curie Actionsen
dc.date.accessioned2017-02-28T15:02:13Z
dc.date.available2017-02-28T15:02:13Z
dc.date.issued2017-02-21
dc.date.updated2017-02-28T14:42:52Z
dc.description.abstractHerein, we report a novel photocathode for the water splitting reaction. The electrochemical deposition of Cu2O particles on boron doped diamond (BDD) electrodes and the subsequent decoration with NiO nanoparticles by a dip coating method to act as co-catalyst for hydrogen evolution reaction is described. The morphology analysis by scanning electron microscope (SEM) revealed that Cu2O particles are cubic and decorated sporadically with NiO nanoparticles. X-ray photoelectron spectroscopy (XPS) confirmed the electronic interaction at the interface between Cu2O and NiO through a binding energy shift of the main Cu 2p peak. The photoelectrochemical (PEC) performance of NiO-Cu2O/BDD showed a much higher current density (-0.33 mA/cm2) and photoconversion efficiency (0.28%) compared to the unmodified Cu2O/BDD electrode, which are only -0.12 mA/cm2 and 0.06%, respectively. The enhancement in PEC performance is attributable to the synergy of NiO as an electron conduction mediator leading to the enhanced charge separation and transfer to the reaction interface for hydrogen evolution as evidenced by electrochemical impedance spectroscopy (EIS) and charge carrier density calculation. Stability tests showed that the NiO nanoparticles loading content on Cu2O surface is a crucial parameter in this regard.en
dc.description.sponsorshipIrish Research Council (Elevate fellowship ELEVATEPD/2014/15 co-funded by Marie Curie Actions)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMavrokefalos, C. K., Hasan, M., Rohan, J. F., Compton, R. G. and Foord, J. S. 'Electrochemically deposited Cu2O cubic particles on boron doped diamond substrate as efficient photocathode for solar hydrogen generation', Applied Surface Science. In Press. doi:10.1016/j.apsusc.2017.02.148en
dc.identifier.doi10.1016/j.apsusc.2017.02.148
dc.identifier.issn0169-4332
dc.identifier.journaltitleApplied Surface Scienceen
dc.identifier.urihttps://hdl.handle.net/10468/3707
dc.language.isoenen
dc.publisherElsevieren
dc.rights© 2017 Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 licenseen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectDiamonden
dc.subjectCopper Oxideen
dc.subjectPhotocatalystsen
dc.subjectSolar Fuelsen
dc.subjectWater Splittingen
dc.subjectHydrogen Energy.en
dc.titleElectrochemically deposited Cu2O cubic particles on boron doped diamond substrate as efficient photocathode for solar hydrogen generationen
dc.typeArticle (peer-reviewed)en
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