By a mild and straightforward synthetic protocol in aqueous solution and without surfactants, hierarchical Cu2O nanospheres were grown on preformed In2O3 nanostructures, varying the ratio In:Cu (2.5, 0.5). Accordingly, two different binary compounds In2O3-Cu2O were prepared and afterwards they were integrated with TiO2 NPs. The ternary composites having a loading of 2.0, 5.0 and 10.0 wt.% respectively of binary In2O3-Cu2O, were tested as photocatalysts in the solar-driven production of hydrogen from water, using as sacrificial agents alcohols derived from the biomass. Satisfyingly, the rate of H2 evolution (20.5 mmol/g h) resulted two orders of magnitude higher respect to bare TiO2 (0.2 mmol/g h). Electrochemical impedance spectroscopy and photoluminescence measurements revealed the formation of a tight heterojunction between In2O3 and Cu2O, which is responsible for the improved charge carrier density and transfer and for the diminished electron-hole recombination.
Tightly Interfaced Cu2O with In2O3 to Promote Hydrogen Evolution in Presence of Biomass‐Derived Alcohols
Impemba, Salvatore;Provinciali, Giacomo;Filippi, Jonathan;Caporali, Stefano;Muzzi, Beatrice;Caporali, Maria
2024
Abstract
By a mild and straightforward synthetic protocol in aqueous solution and without surfactants, hierarchical Cu2O nanospheres were grown on preformed In2O3 nanostructures, varying the ratio In:Cu (2.5, 0.5). Accordingly, two different binary compounds In2O3-Cu2O were prepared and afterwards they were integrated with TiO2 NPs. The ternary composites having a loading of 2.0, 5.0 and 10.0 wt.% respectively of binary In2O3-Cu2O, were tested as photocatalysts in the solar-driven production of hydrogen from water, using as sacrificial agents alcohols derived from the biomass. Satisfyingly, the rate of H2 evolution (20.5 mmol/g h) resulted two orders of magnitude higher respect to bare TiO2 (0.2 mmol/g h). Electrochemical impedance spectroscopy and photoluminescence measurements revealed the formation of a tight heterojunction between In2O3 and Cu2O, which is responsible for the improved charge carrier density and transfer and for the diminished electron-hole recombination.File | Dimensione | Formato | |
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ChemNanoMat - 2024 - Impemba - Tightly Interfaced Cu2O with In2O3 to Promote Hydrogen Evolution in Presence of.pdf
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Descrizione: "This is the peer reviewed version of the following article: Salvatore Impemba, Giacomo Provinciali, Jonathan Filippi, Stefano Caporali, Beatrice Muzzi, Andrea Casini, Maria Caporali, ChemNanoMat 2024, e202400459, which has been published in final form at https://doi.org/10.1002/cnma.202400459. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited."
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