Publication date: 15th December 2025
Renewable H2 is a carbon-free energy vector and sustainable alternative to the use of fossil fuels. Solar-driven photocatalytic H2 generation from water is envisioned as an attractive technology for this purpose.[1] In recent years, metal-organic frameworks (MOFs) have emerged as potential heterogeneous photocatalysts for water splitting reactions.[2] One of the current challenges is the development of efficient MOFs for solar-driven overall water splitting (OWS) into H2 and O2.[2]
Herein, I present some of the strategies developed in our group to boost the photocatalytic performance of MOFs for solar-assisted water splitting reactions including hydrogen evolution (HER), oxygen evolution (OER) and OWS reactions.[2] The nature of metal node and organic ligand composition is identified as a methodology that determines both their energy band diagram and ability to boost water splitting reactions.[3] The development of mixed-metal porphyrin-based MOFs will also be discussed.[4] The influence of co-catalysts on photocatalytic activity of MOFs will be briefly shown.[5] MOF defect engineering via in situ or post-synthetic modification also can boost photocatalytic activity.[6] Finally, recent methodologies based on engineering MOF-on-MOF heterojunctions with the record activities for challenging OWS are presented.[7] Experimental evidence on the observed photocatalytic activities and insights about reaction mechanisms will be discussed through the presentation based on several techniques including spectroscopic and electrochemical characterizations combined with computational chemistry.
S.N. acknowledges financial support received from Grant PID2024-155324OB-I00 funded by MICIU/AEI/10.13039/501100011033 and by ERDF A way of making Europe and from European Union under the Grant Agreement 101084131 (MOF2H2 project).
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