000K  utf8
1100  2022$c2022-09-25
1500  eng
2050  urn:nbn:de:gbv:27-dbt-20221017-074756-005
2051  10.3390/nano12193343
3000  Rosner, Tal
3010  Adir, Noam
3010  Amirav, Lilac
3010  Micheel, Mathias
3010  Pavlopoulos, Nicholas G.
3010  Shoyhet, Hagit
3010  Wächtler, Maria
4000  The Other Dimension—Tuning Hole Extraction via Nanorod Width  [Rosner, Tal]
4060  10 Seiten
4209  Solar-to-hydrogen generation is a promising approach to generate clean and renewable fuel. Nanohybrid structures such as CdSe@CdS-Pt nanorods were found favorable for this task (attaining 100% photon-to-hydrogen production efficiency); yet the rods cannot support overall water splitting. The key limitation seems to be the rate of hole extraction from the semiconductor, jeopardizing both activity and stability. It is suggested that hole extraction might be improved via tuning the rod’s dimensions, specifically the width of the CdS shell around the CdSe seed in which the holes reside. In this contribution, we successfully attain atomic-scale control over the width of CdSe@CdS nanorods, which enables us to verify this hypothesis and explore the intricate influence of shell diameter over hole quenching and photocatalytic activity towards H 2 production. A non-monotonic effect of the rod’s diameter is revealed, and the underlying mechanism for this observation is discussed, alongside implications towards the future design of nanoscale photocatalysts.
4950  https://doi.org/10.3390/nano12193343$xR$3Volltext$534
4950  https://nbn-resolving.org/urn:nbn:de:gbv:27-dbt-20221017-074756-005$xR$3Volltext$534
4961  https://www.db-thueringen.de/receive/dbt_mods_00053633
5051  570
5550  hole extraction
5550  hydrogen
5550  photocatalysis
5550  seeded rods
5550  semiconductor nanorods
5550  transient absorption