Controllable Synthesis of Defective TiO2 Nanorods for Efficient Hydrogen Production
Nanorods (NRs), with their high atomic surface exposure within a crystalline architecture, facilitate effective diffusion/transport of charge, rendering them particularly suitable for applications requiring both interaction with the media and charge transfer. In this study, we present a straightforw...
| Autores: | , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:307877 |
| Acceso en línea: | https://ddd.uab.cat/record/307877 https://dx.doi.org/urn:doi:10.1021/acsaelm.4c00821 |
| Access Level: | acceso abierto |
| Palabra clave: | TiO2 nanorod Photocatalysis Hydrogen production Brookite Defect |
| Sumario: | Nanorods (NRs), with their high atomic surface exposure within a crystalline architecture, facilitate effective diffusion/transport of charge, rendering them particularly suitable for applications requiring both interaction with the media and charge transfer. In this study, we present a straightforward approach to produce brookite-phase titanium dioxide (TiO) NRs with tunable defects and narrow size distributions by utilizing methylamine hydrochloride and 1,2-hexadecanediol as shape-directing agents. The presence of the Ti defect was confirmed by electron paramagnetic resonance and X-ray photoelectron spectroscopy, and its effect on the photocatalytic properties of TiO, with and without Pt loading, show that the longest TiO NRs provide the highest photocatalytic and photoelectrochemical hydrogen production activity. Transient photocurrent response analysis, electrochemical impedance spectroscopy, and Mott-Schottky analysis plots indicate that an increase in temperature significantly reduces the interface barrier and lowers the transport resistance, leading to a 104% improvement in hydrogen production rates from 25 to 60 °C for the longest TiO NRs. This study underscores the critical role of the TiO nanorod dimensions (18-45 nm) in elevating the hydrogen production efficiency. At 25 °C, rates surged from 1.6 to 2.6 mmol g h, and at 60 °C, rates soared from 3.3 to 5.3 mmol g h, demonstrating the substantial impact of TiO NRs on enhancing hydrogen generation. |
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