Academic Journal
Hydrogen-Induced Reduction Improves the Photoelectrocatalytic Performance of Titania
| العنوان: | Hydrogen-Induced Reduction Improves the Photoelectrocatalytic Performance of Titania |
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| المؤلفون: | Carlos Sánchez-Sánchez, Roberto Muñoz, Elena Alfonso-González, Mariam Barawi, José I. Martínez, Elena López-Elvira, Gabriel Sánchez-Santolino, Naoya Shibata, Yuichi Ikuhara, Gary J. Ellis, Mar García-Hernández, María Francisca López, Víctor A. de la Peña O’Shea, José A. Martín-Gago |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Molecular Biology, Evolutionary Biology, Space Science, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, single crystals annealed, multiscale study opens, magnitudes behave oppositely, green photothermal absorbers, enhanced (× 10, solar energy applications, induced reduction improves, atomic scale description, efficient rutile tio, 2 , improved photoelectrocatalytic performance, atomic hydrogen experience, rutile tio, photoelectrocatalytic performance, diverse applications, strong reduction, reduction mechanisms, photoelectrochemical performance, titanium dioxide, ti atoms, structural rearrangement, spectral range, sensing materials, reduced materials, photocatalytic properties |
| الوصف: | One of the main challenges to expand the use of titanium dioxide (titania) as a photocatalyst is related to its large band gap energy and the lack of an atomic scale description of the reduction mechanisms that may tailor the photocatalytic properties. We show that rutile TiO 2 single crystals annealed in the presence of atomic hydrogen experience a strong reduction and structural rearrangement, yielding a material that exhibits enhanced light absorption, which extends from the ultraviolet to the near-infrared (NIR) spectral range, and improved photoelectrocatalytic performance. We demonstrate that both magnitudes behave oppositely: heavy/mild plasma reduction treatments lead to large/negligible spectral absorption changes and poor/enhanced (×10) photoelectrocatalytic performance, as judged from the higher photocurrent. To correlate the photoelectrochemical performance with the atomic and chemical structures of the hydrogen-reduced materials, we have modeled the process with in situ scanning tunneling microscopy measurements, which allow us to determine the initial stages of oxygen desorption and the desorption/diffusion of Ti atoms from the surface. This multiscale study opens a door toward improved materials for diverse applications such as more efficient rutile TiO 2 -based photoelectrocatalysts, green photothermal absorbers for solar energy applications, or NIR-sensing materials. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| Relation: | https://figshare.com/articles/journal_contribution/Hydrogen-Induced_Reduction_Improves_the_Photoelectrocatalytic_Performance_of_Titania/25255151 |
| DOI: | 10.1021/acsaem.3c02707.s001 |
| الاتاحة: | https://doi.org/10.1021/acsaem.3c02707.s001 https://figshare.com/articles/journal_contribution/Hydrogen-Induced_Reduction_Improves_the_Photoelectrocatalytic_Performance_of_Titania/25255151 |
| Rights: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.63B9FEED |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acsaem.3c02707.s001 |
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