Show simple item record

dc.contributor.authorSudhagar, P.
dc.contributor.authorSong, Taeseup
dc.contributor.authorDevadoss, Anitha
dc.contributor.authorLee, Jung Woo
dc.contributor.authorHaro, Marta
dc.contributor.authorTerashima, Chiaki
dc.contributor.authorLysak, Volodymyr V.
dc.contributor.authorBisquert, Juan
dc.contributor.authorFujishima, Akira
dc.contributor.authorGimenez, Sixto
dc.contributor.authorPaik, Ungyu
dc.date.accessioned2016-03-23T19:22:57Z
dc.date.available2016-03-23T19:22:57Z
dc.date.issued2015
dc.identifier.issn1463-9084
dc.identifier.issn1463-9076
dc.identifier.urihttp://hdl.handle.net/10234/155285
dc.description.abstractThe interaction strength of Au nanoparticles with pristine and nitrogen doped TiO2 nanowire surfaces was analysed using density functional theory and their significance in enhancing the solar driven photoelectrocatalytic properties was elucidated. In this article, we prepared 4-dimethylaminopyridine capped Au nanoparticle decorated TiO2 nanowire systems. The density functional theory calculations show {101} facets of TiO2 as the preferred phase for dimethylaminopyridine–Au nanoparticles anchoring with a binding energy of 8.282 kcal mol1 . Besides, the interaction strength of Au nanoparticles was enhanced nearly four-fold (35.559 kcal mol1 ) at {101} facets via nitrogen doping, which indeed amplified the Au nanoparticle density on nitrided TiO2. The Au coated nitrogen doped TiO2 (N–TiO2–Au) hybrid electrodes show higher absorbance owing to the light scattering effect of Au nanoparticles. In addition, N–TiO2–Au hybrid electrodes block the charge leakage from the electrode to the electrolyte and thus reduce the charge recombination at the electrode/electrolyte interface. Despite the beneficial band narrowing effect of nitrogen in TiO2 on the electrochemical and visible light activity in N–TiO2–Au hybrid electrodes, it results in low photocurrent generation at higher Au NP loading (3.4 107 M) due to light blocking the N–TiO2 surface. Strikingly, even with a ten-fold lower Au NP loading (0.34 107 M), the synergistic effects of nitrogen doping and Au NPs on the N–TiO2–Au hybrid system yield high photocurrent compared to TiO2 and TiO2–Au electrodes. As a result, the N–TiO2–Au electrode produces nearly 270 mmol h1 cm2 hydrogen, which is nearly two-fold higher than the pristine TiO2 counterpart. The implications of these findings for the design of efficient hybrid photoelectrocatalytic electrodes are discussed. Introducca_CA
dc.description.sponsorShipGlobal Research Laboratory (GRL) Program through the National Research Foundation of Korea (NRF) - Ministry of Science. K20704000003TA050000310 Japan Society for the Promotion of Science (JSPS) University Jaume I. P1.1B2014-51 Government of the Russian Federation. 074-U01ca_CA
dc.format.extent8 p.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherRoyal Society of Chemistryca_CA
dc.relation.isPartOfPhys. Chem. Chem. Phys., 2015, 17, 19371ca_CA
dc.rightsThis journal is © the Owner Societies 2015ca_CA
dc.subjectvisible-lightca_CA
dc.subjectdoped tio2ca_CA
dc.subjectphotocatalytic reactionsca_CA
dc.subjectanatase tio2ca_CA
dc.subjectwaterca_CA
dc.subjectnanoparticlesca_CA
dc.subjectnanostructuresca_CA
dc.subjectelectrodesca_CA
dc.subjectoxidationca_CA
dc.subjectcellsca_CA
dc.titleModulating the interaction between gold and TiO2 nanowires for enhanced solar driven photoelectrocatalytic hydrogen generationca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttp://dx.doi.org/10.1039/c5cp01175b
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_CA
dc.relation.publisherVersionhttp://pubs.rsc.org/en/content/articlelanding/2015/cp/c5cp01175b#!divAbstractca_CA


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record