Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)
DOI: https://doi.org/10.29363/nanoge.matsusfall.2024.254
Publication date: 28th August 2024
Cost-effective and efficient photoelectrochemical (PEC) water splitting stands out as one of the most promising strategies to address sustainable energy supply in the form of green H2. However, large-area photoelectrodes and electrocatalysts featuring fine chemical and morphological control are key for effective industrial deployment. Consequently, up-scaling of laboratory synthetic strategies to an industrial relevant scale is mandatory. In this presentation, we will discuss two different approaches for the development of large-area (photo)electrodes. On the one hand, the preparation of BiVO4 nanoparticles with a continuous flow-system method,[1] and their subsequent deposition onto large-area conductive substrates as water splitting photoanodes will be discussed. BiVO4 photoanodes are the most promising platforms for upscalable photoelectrochemical water splitting.[2] The proposed system allows to up-scale the synthesis through a microreactor and provides an affordable methodology for the fabrication of cost-effective, large-scale BiVO4 photoanodes with areas up to 50 cm2 and competitive performance. On the other hand, we will discuss a low-temperature, straightforward, and fast synthetic method with an extraordinary ability to in situ generate homogeneous NiFe-based electrocatalytic thin films from a precursor solution compatible with different industrial printing techniques such as inkjet printing and slot-die coating.[3] Remarkably, this in situ synthesis approach can be easily integrated into scale-up processes like roll-to-roll printing for large-area and cost-effective mass production. The OER activity of the as-synthesized electrocatalysts was promising and the method is fully compatible with deposition onto metal oxide photoanodes.
We gratefully acknowledge the financial support from the European Commission associated to the European project “SUN2CHEM”, through the Grant Agreement 884444. The authors thank support from the projects (PID2020-116093RB-C41) funded by MCIN/ AEI/10.13039/501100011033/ and by “ERDF A way of making Europe”, by the “European Union”. We want to acknowledge the Ministerio de Universidades, supported by the Margarita Salas postdoctoral contract MGS/2022/02(UP2021-021) financed by the European Union-NextGenerationEU and also Universitat Jaume I (grants UJI-2023-15 and UJI-B2020-50).
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