Efficient and Stable Hydrogen Evolution from HI Splitting Using a Robust 2D Tin-Iodide Perovskite
Samiksha Mukesh Jain, Samrat Das Adhikari, Camilo A. Mesa, Hind Benzidi, José Manuel González-Acosta, Andrés F. Gualdrón-Reyes, Núria López, Sixto Giménez, Iván Mora-Seró
TL;DR
A new tin-iodide perovskite material efficiently produces hydrogen from sunlight and is highly stable and recyclable.
Contribution
A 2D tin-iodide perovskite with exceptional photostability and recoverability is developed for hydrogen production.
Findings
4FPSI perovskite microcrystals show long-term photostability and sustained H2 production from HI splitting.
Intermittent light irradiation enhances H2 production by improving charge separation and reducing recombination.
Degraded materials can be chemically recovered to restore hydrogen production capabilities.
Abstract
Photocatalytic hydrogen (H2) production with 2D Ruddlesden–Popper tin-iodide perovskites has recently emerged as a promising route toward sustainable solar-to-fuel conversion. However, a major limitation of these systems lies in their rapid degradation caused by tin and iodide oxidation. In the present study, we report the synthesis of 4-fluorophenethylammonium tin-iodide (4FPSI) perovskite microcrystals in a mixture of hydroiodic acid (HI) and H2O, which exhibit remarkable long-term photostability and sustained photocatalytic H2 production via HI splitting. Intermittent light irradiation was shown to further boost H2 production by promoting efficient charge separation and suppressing the accumulation of trapped charge carriers that drive recombination. Notably, reused and aged materials showed enhanced photocatalytic performance, which theoretical simulations attributed to surface…
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Taxonomy
TopicsAdvanced Photocatalysis Techniques · Perovskite Materials and Applications · TiO2 Photocatalysis and Solar Cells