dc.date.accessioned | 2020-07-16T18:35:47Z | |
dc.date.available | 2020-07-16T18:35:47Z | |
dc.date.created | 2018-11-19T17:04:51Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Xu, Kaiqi Chatzitakis, Athanasios Eleftherios Jensen, Ingvild Julie Thue Grandcolas, Mathieu Norby, Truls Eivind . Ta3N5/Co(OH)x composites as photocatalysts for photoelectrochemical water splitting. Photochemical and Photobiological Sciences. 2019, 18(4), 837-844 | |
dc.identifier.uri | http://hdl.handle.net/10852/78025 | |
dc.description.abstract | Ta3N5 nanotubes (NTs) were obtained from nitridation of Ta2O5 NTs, which were grown directly on Ta foil through a 2-step anodization procedure. With Co(OH)x decoration, a photocurrent density as high as 2.3 mA cm−2 (1.23 V vs. NHE) was reached under AM1.5G simulated solar light; however, the electrode suffered from photocorrosion. More stable photoelectrochemical (PEC) performance was achieved by first loading Co(OH)x, followed by loading cobalt phosphate (Co–Pi) as double co-catalysts. The Co(OH)x/Co–Pi double co-catalysts may act as a hole storage layer that slows down the photocorrosion caused by the accumulated holes on the surface of the electrode. A “waggling” appearance close to the “mouth” of Ta2O5 NTs was observed, and may indicate structural instability of the “mouth” region, which breaks into segments after nitridation and forms a top layer of broken Ta3N5 NTs. A unique mesoporous structure of the walls of the Ta3N5 NTs, which is reported here the first time, is also a result of the nitridation process. We believe that the mesoporous structure makes it difficult for the nanotubes to be fully covered by the co-catalyst layer, hence rationalizing the remaining degradation by photocorrosion. | en_US |
dc.language | EN | |
dc.title | Ta3N5/Co(OH)x composites as photocatalysts for photoelectrochemical water splitting | en_US |
dc.type | Journal article | en_US |
dc.creator.author | Xu, Kaiqi | |
dc.creator.author | Chatzitakis, Athanasios Eleftherios | |
dc.creator.author | Jensen, Ingvild Julie Thue | |
dc.creator.author | Grandcolas, Mathieu | |
dc.creator.author | Norby, Truls Eivind | |
cristin.unitcode | 185,15,17,0 | |
cristin.unitname | Senter for materialvitenskap og nanoteknologi | |
cristin.ispublished | true | |
cristin.fulltext | preprint | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1632334 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Photochemical and Photobiological Sciences&rft.volume=18&rft.spage=837&rft.date=2019 | |
dc.identifier.jtitle | Photochemical and Photobiological Sciences | |
dc.identifier.volume | 18 | |
dc.identifier.issue | 4 | |
dc.identifier.startpage | 837 | |
dc.identifier.endpage | 844 | |
dc.identifier.doi | https://doi.org/10.1039/c8pp00312b | |
dc.identifier.urn | URN:NBN:no-81141 | |
dc.type.document | Tidsskriftartikkel | en_US |
dc.source.issn | 1474-905X | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/78025/2/Ta3N5_K%2BXu%2Bet%2Bal.pdf | |
dc.type.version | SubmittedVersion | |
dc.relation.project | NFR/250261 | |