Repozytorium publikacji - Politechnika Gdańska

Here, novel in-situ Raman photoelectrochemical measurements are performed. The obtained results have proved that it is possible to track the progress of a photoelectrochemical reaction that takes place on a semiconducting electrode using the spectroscopic method. As an exemplary system, the Ti/TiO2/Prussian blue electrode is investigated. Since TiO2 is an n-type semiconductor, it cannot act as an efficient anode in dark conditions. Thus, once electrochemically reduced Prussian blue deposited on TiO2 is not reoxi- dized during anodic polarization. However, Everitt’s salt oxidation may be possible when photoexcitation of TiO2 with UV LED radiation takes place at a potential which is more anodic than the flat band poten- tial of the semiconductor. This process is successfully monitored in-situ using Raman spectroscopy. The measurements performed at different conditions allow to distinguish between processes induced by po- larization and illumination (or both). The proposed method of photoelectrode characterization through a real-time monitoring approach can be further developed and utilized for other photoelectrochemical systems.

Autorzy

• dr inż. Konrad Trzciński link otwiera się w nowej karcie ,
• dr inż. Mariusz Szkoda link otwiera się w nowej karcie ,
• Zuzanna Zarach link otwiera się w nowej karcie ,
• dr hab. inż. Mirosław Sawczak,
• dr hab. inż. Andrzej Nowak link otwiera się w nowej karcie