Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.294
Publication date: 16th December 2024
Photoelectrochemical (PEC) energy storage is a promising technology for our sustainable future. Many photoelectrodes have been developed to drive the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Optimizing photoelectrodes that are highly active and selective to the reactions is a challenging task, as well as ensuring their stability during operation in harsh PEC environments.
In this talk, we present an illuminated scanning flow cell (iSFC) setup that enables the performance of operando PEC characterization on the activity of photoelectrodes, and simultaneously on their stability against aqueous dissolution. Selected examples of the operando setup will be presented, for instance the photo-corrosion of BiVO4 photoanodes [1], [2], and the photo-stability range of ZnFe2O4 photoanodes [3].
Then, studies on a promising photocathode material, CuBi2O4, will be presented. The photocathode has been investigated not only for HER, but also nitrogen reduction reaction (NRR) as a PEC route to fixate N2. Dissolution of Bi has been observed in an alkaline environment, and the PEC corrosion was further revealed using scanning transmission electron microscopy (STEM).
We acknowledge funding from the German Research Foundation (DFG) under the framework of the priority program 2370 (project numbers: 501901537, 502202153).
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