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Unprecedented solar water splitting of dendritic nanostructured Bi2O3 films by combined oxygen vacancy formation and Na2MoO4 doping
dc.contributor.author | Naji Shaddad, Maged | |
dc.contributor.author | Arunachalam, Prabhakarn | |
dc.contributor.author | Hezam, Mahmoud | |
dc.contributor.author | AL-Saeedan, Norah M. | |
dc.contributor.author | Gimenez, Sixto | |
dc.contributor.author | Bisquert, Juan | |
dc.contributor.author | Al-Mayouf, Abdullah | |
dc.date.accessioned | 2021-11-02T08:01:19Z | |
dc.date.available | 2021-11-02T08:01:19Z | |
dc.date.issued | 2021-05-27 | |
dc.identifier.citation | SHADDAD, Maged N., et al. Unprecedented solar water splitting of dendritic nanostructured Bi2O3 films by combined oxygen vacancy formation and Na2MoO4 doping. International Journal of Hydrogen Energy, 2021. | ca_CA |
dc.identifier.issn | 0360-3199 | |
dc.identifier.uri | http://hdl.handle.net/10234/195329 | |
dc.description.abstract | We demonstrate the synergetic effect of Na2MoO4-doping and vacuum-annealing on dendritic nanostructured bismuth oxide (Bi2O3) thin films prepared by electrodeposition for visible-light-assisted photoelectrochemical (PEC) water oxidation. After evaluating various extents of Na2MoO4-doping as well as vacuum-annealing temperatures, it was evidenced that both Na2MoO4-doping and vacuum-annealing significantly improved the efficiency and PEC water oxidation performance. Compared to the undoped Bi2O3 photoanode, the optimized Na2MoO4-doped Bi2O3, after vacuum-annealing, resulted in more than 25-fold enhancement in the photoanodic current density to 1.06 mA/cm2 at 1.23 VRHE under AM1.5 G illumination. The PEC enhancement is credited mainly to the increased PEC surface active sites in the Na2MoO4-doped vacuum annealed sample. Confirmed by combined XPS and Mott-Schottky (M − S) analysis, vacuum annealing resulted in surface oxygen vacancies that can contribute to the photocatalytic activity. Besides, Na2MoO4-doping resulted in reduced dimensions of the dendritic structure, revealed by FE-SEM and XRD measurements, resulting in larger surface area and, therefore, larger surface/electrolyte contact. This dual strategy (metal doping + vacuum annealing) can be generalized to assemble photoanodes of other materials used for the production of solar fuels. Our results make a valuable step towards efficient Bi2O3/BiVO4 pn heterojunctions. | ca_CA |
dc.format.extent | 13 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | Elsevier | ca_CA |
dc.publisher | International Association for Hydrogen Energy | ca_CA |
dc.relation.isPartOf | International Journal of Hydrogen Energy Volume 46, Issue 46, 6 July 2021, Pages 23702-23714 | ca_CA |
dc.relation.uri | https://ars.els-cdn.com/content/image/1-s2.0-S0360319921016311-mmc1.docx | ca_CA |
dc.rights | 0360-3199/©2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. | ca_CA |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | ca_CA |
dc.subject | β-Bi2O3 nonporous | ca_CA |
dc.subject | oxygen vacancies (OVs) | ca_CA |
dc.subject | water splitting | ca_CA |
dc.subject | surface engineering | ca_CA |
dc.subject | doping | ca_CA |
dc.title | Unprecedented solar water splitting of dendritic nanostructured Bi2O3 films by combined oxygen vacancy formation and Na2MoO4 doping | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | https://doi.org/10.1016/j.ijhydene.2021.04.184 | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_CA |
dc.relation.publisherVersion | https://www.sciencedirect.com/journal/international-journal-of-hydrogen-energy | ca_CA |
dc.type.version | info:eu-repo/semantics/acceptedVersion | ca_CA |
project.funder.name | National Plan for Science,Technology and Innovation, King Abdulaziz City for Science and Technology, Kingdom of Saudi Arabia | ca_CA |
oaire.awardNumber | 14-NAN2323-02 | ca_CA |
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