Photodehydrogenation of ethanol over CuO/TiO heterostructures
| Autor: | Xing, Congcong, Zhang, Yu, Liu, Yongpeng, Wang, Xiang, Li, Junshan, Martínez-Alanis, Paulina R., Spadaro, Maria Chiara, Guardia, Pablo, Arbiol i Cobos, Jordi, Llorca, Jordi, Cabot, Andreu |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona |
| Popis: | Altres ajuts: CERCA Program/Generalitat de Catalunya. ICN2 thanks supporting from the CERCA Program/Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Autònoma de Barcelona Materials Science PhD program. J.L. is a Serra Hunter fellow and is grateful to GC 2017 SGR 128 and ICREA Academia program. The photodehydrogenation of ethanol is a sustainable and potentially cost-effective strategy to produce hydrogen and acetaldehyde from renewable resources. The optimization of this process requires the use of highly active, stable and selective photocatalytic materials based on abundant elements and the proper adjustment of the reaction conditions, including temperature. In this work, CuO-TiO type-II heterojunctions with different CuO amounts are obtained by a one-pot hydrothermal method. The structural and chemical properties of the produced materials and their activity toward ethanol photodehydrogenation under UV and visible light illumination are evaluated. The CuO-TiO photocatalysts exhibit a high selectivity toward acetaldehyde production and up to tenfold higher hydrogen evolution rates compared to bare TiO. We further discern here the influence of temperature and visible light absorption on the photocatalytic performance. Our results point toward the combination of energy sources in thermo-photocatalytic reactors as an efficient strategy for solar energy conversion. |
| Databáze: | OpenAIRE |
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