20.500.12556/DiRROS-30851 Architectural engineering of reduced graphene oxide in ▫$BiVO_4$▫ photoanodes for enhanced photoelectrochemical performance Bismuth vanadate (BiVO4) is a promising photoanode material for solar water splitting due to its visible-light absorption and earth-abundant composition. Herein, we investigate how the spatial positioning of reduced graphene oxide (rGO) influences the photoelectrochemical performance of hydrothermally synthesized BiVO4 photoanodes. Two heterostructures were examined, with rGO incorporated either beneath the BiVO4 layer (BVO/rGO/FTO) or on the surface (rGO/BVO/FTO). Both architectures exhibit enhanced photocurrent densities compared to pristine BiVO4. Surface-deposited rGO primarily improves interfacial charge extraction, resulting in the highest photocurrent and interfacial efficiencies exceeding 25–30%. In contrast, buried rGO enhances bulk charge separation and electron transport, leading to a nearly twofold increase in charge-transport efficiency and an fourfold enhancement in photovoltage. IPCE values increased by more than one order of magnitude relative to pristine BiVO4, demonstrating the importance of heterointerface engineering for optimizing charge-transfer pathways in ceramic photoanodes. watersplitting reduced graphene oxide heterointerfaces cepitev vode true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2026 The Author(s). Neznano 2026-07-07 12:13:56 2026-07-07 12:13:57 2026-07-08 03:48:24 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Soavtorji iz Slovenije: Srečo Škapin, Matjaž Spreitzer; Opis vira z dne 6. 7. 2026; str. 1-13 Vol. 27, [article no.] 101009 Sep. 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2026-05-19 2026-06-25 2026-06-26 544.5/.6 2666-5395 10.1016/j.oceram.2026.101009 283753987 https://www.sciencedirect.com/science/article/pii/S2666539526001057?via%3Dihub 1 921377b0-79ec-11f1-a65c-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=47265 RAZ_Jelic_Marko_2026.pdf RAZ_Jelic_Marko_2026.pdf 1 AA9941EAFEC3378095F14AB3271B9141 359718f0bcd8508ba257fbcf7fb351e5c2ca87bb10377174d760ec181111bead fea23801-79ec-11f1-a65c-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=47266 Institut Jožef Stefan 0 0 0