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

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dc.contributor.author Mavrokefalos, Christos K.
dc.contributor.author Hasan, Maksudul
dc.contributor.author Rohan, James F.
dc.contributor.author Compton, Richard G.
dc.contributor.author Foord, John S.
dc.date.accessioned 2017-02-28T15:02:13Z
dc.date.available 2017-02-28T15:02:13Z
dc.date.issued 2017-02-21
dc.identifier.citation Mavrokefalos, 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.2017.02.148 en
dc.identifier.issn 0169-4332
dc.identifier.uri http://hdl.handle.net/10468/3707
dc.identifier.doi 10.1016/j.apsusc.2017.02.148
dc.description.abstract Herein, 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.sponsorship Irish Research Council (Elevate fellowship ELEVATEPD/2014/15 co-funded by Marie Curie Actions) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier en
dc.rights © 2017 Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license en
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject Diamond en
dc.subject Copper Oxide en
dc.subject Photocatalysts en
dc.subject Solar Fuels en
dc.subject Water Splitting en
dc.subject Hydrogen Energy. en
dc.title Electrochemically deposited Cu2O cubic particles on boron doped diamond substrate as efficient photocathode for solar hydrogen generation en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother James Rohan, Tyndall Microsystems, University College Cork, Cork, Ireland. +353-21-490-3000 Email: james.rohan@tyndall.ie en
dc.internal.availability Full text available en
dc.check.info Access to this item is restricted until 24 months after publication by the request of the publisher. en
dc.check.date 2019-02-21
dc.date.updated 2017-02-28T14:42:52Z
dc.description.version Accepted Version en
dc.internal.rssid 385326856
dc.contributor.funder Irish Research Council en
dc.contributor.funder H2020 Marie Skłodowska-Curie Actions en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Applied Surface Science en
dc.internal.copyrightchecked No !!CORA!! en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress james.rohan@tyndall.ie en


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© 2017 Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license Except where otherwise noted, this item's license is described as © 2017 Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
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