DOI: https://doi.org/10.29363/nanoge.ecat.2023.013
Publication date: 10th October 2023
Design of photoelectrochemical reactors for solar water splitting brings together science and engineering. It is a truly fascinating interdisciplinary challenge, requiring the understanding of semiconductor physics, (photo-)electrochemistry (including catalysis and corrosion), chemical engineering (including fluid dynamics and mass and heat transfer) and optics, which are all crucial to the development of an efficient and robust device.
I shall discuss the principal factors which constrain device design and present the work we have done on several different systems. I will also present our multiphysics models, which are required for device optimisation to avoid overall performance loss.[1 – 4] Losses in terms of hydrogen production rate and solar-to-hydrogen conversion efficiency could be caused by: severe potential and current distributions across poorly conducing electrodes, overheating, product crossover, optical losses due to light blockage by evolving hydrogen/oxygen bubbles and electrode corrosion.
In general, I am an interested in discovering the answer to the question ‘What might an industrial scale photoelectrochemical reactor system ultimately look like?’. I will talk about the steps taken to answer this question thus far and I will also discuss the research carried our in my research group: Electrochemical Systems Laboratory.
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