Yang, Florent ; Schröck, Christopher ; Kugelstadt, Jan ; Zhang, Siyuan ; Scheu, Christina ; Trautmann, Christina ; Maijenburg, A. Wouter ; Toimil-Molares, Maria Eugenia (2020)
Cu2O/TiO2 nanowire assemblies as photocathodes for solar hydrogen evolution: influence of diameter, length and numberdensity of wires.
In: Zeitschrift für Physikalische Chemie, 234 (6)
doi: 10.1515/zpch-2019-1529
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The performance of free-standing parallel-aligned nanowire arrays and interconnected networks of single-crystalline cuprous oxide (Cu2O) coated with titanium oxide (TiO2) as photocathodes for solar energy harvesting was analyzed. The nanostructures were synthesized by electrodeposition in polymer membranes prepared by ion-track technology. To enhance the photoelectrochemical stability of the nanowires in aqueous solution, they were conformally coated with a 10 nm thick TiO2 layer by atomic layer deposition. The diameter, size, geometry and number density of the parallel nanowires were systematically varied. The generated photocurrents show a clear increase as a function of wire diameter and wire number. In turn, the photocurrent does not get larger with increasing wire length. Highly interconnected networks of nanowires under 45 degrees from various directions enabled further increase of wire density number and exhibited higher photocurrent densities compared to parallel arrays.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Yang, Florent ; Schröck, Christopher ; Kugelstadt, Jan ; Zhang, Siyuan ; Scheu, Christina ; Trautmann, Christina ; Maijenburg, A. Wouter ; Toimil-Molares, Maria Eugenia |
| Art des Eintrags: | Bibliographie |
| Titel: | Cu2O/TiO2 nanowire assemblies as photocathodes for solar hydrogen evolution: influence of diameter, length and numberdensity of wires |
| Sprache: | Englisch |
| Publikationsjahr: | 6 Februar 2020 |
| Verlag: | De Gruyter |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Zeitschrift für Physikalische Chemie |
| Jahrgang/Volume einer Zeitschrift: | 234 |
| (Heft-)Nummer: | 6 |
| DOI: | 10.1515/zpch-2019-1529 |
| Kurzbeschreibung (Abstract): | The performance of free-standing parallel-aligned nanowire arrays and interconnected networks of single-crystalline cuprous oxide (Cu2O) coated with titanium oxide (TiO2) as photocathodes for solar energy harvesting was analyzed. The nanostructures were synthesized by electrodeposition in polymer membranes prepared by ion-track technology. To enhance the photoelectrochemical stability of the nanowires in aqueous solution, they were conformally coated with a 10 nm thick TiO2 layer by atomic layer deposition. The diameter, size, geometry and number density of the parallel nanowires were systematically varied. The generated photocurrents show a clear increase as a function of wire diameter and wire number. In turn, the photocurrent does not get larger with increasing wire length. Highly interconnected networks of nanowires under 45 degrees from various directions enabled further increase of wire density number and exhibited higher photocurrent densities compared to parallel arrays. |
| Freie Schlagworte: | Cu2O, electrodeposition, ion-track technology, nanowires, nanowire networks, photocathode, size effect, solar-to-hydrogen |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Ionenstrahlmodifizierte Materialien |
| Hinterlegungsdatum: | 29 Feb 2024 08:12 |
| Letzte Änderung: | 29 Feb 2024 08:12 |
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