Publication date: 27th March 2025
Light induced water splitting (Li-WS) is an attractive way of generating green hydrogen that can be achieved by using devices with different configurations. One example is the straightforward PV-EC design, composed of a photovoltaic cell (PV) connected to an electrolyser (EC), in which light harvesting is separated from the electrolyte chamber where the chemical reactions take place. When more compact designs are envisioned, the process becomes more challenging involving the synchronization of several key phenomena and processes including light absorption, charge separation and chemical bond breakage and formation. Two chemical reactions are to be considered when dealing with Li-WS, namely the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) that are usually triggered by hydrogen evolution catalysts (HEC) and water oxidation catalysts (WOC), respectively. This presentation will take you on a journey across key HEC and WOC catalytic centers in Li-WS, emphasizing their mechanistic pathways and interactions with conducting supports and semiconductor materials of different nature, from graphitic materials to inorganic and organic semiconductors.
Grant PID2021-128496OB-I00 funded by MICIU/AEI/10.13039/501100011033/
SOREC2 GA 101084326 funded by the European Union
2021SGR00064 funded by AGUAR-Generalitat de Catalunya
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