Stabilization of halide perovskite photoanodes with catalytic sheets of different carbon allotropes
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2023-12-18 |
| Authors | Salvador Eslava, MĂĄtyĂĄs DabĂłczi, Zhonghui Zhu |
| Institutions | Imperial College London, Nanjing University of Aeronautics and Astronautics |
Abstract
Section titled âAbstractâStabilization of halide perovskite photoanodes with catalytic sheets of different carbon allotropesSalvador Eslava a, Matyas Daboczi a, Zhonghui Zhu a, ba Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, UKb School of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaMaterials for Sustainable Development Conference (MATSUS)Proceedings of MATSUS Spring 2024 Conference (MATSUS24)#SolFuelScale - Practical aspects of solar fuel production: scalability, stability & outdoor operationBarcelona, Spain, 2024 March 4th - 8thOrganizers: Fatwa Abdi and Virgil AndreiOral, Salvador Eslava, presentation 056DOI: https://doi.org/10.29363/nanoge.matsus.2024.056Publication date: 18th December 2023Halide perovskites have gained wide interest for their application in photovoltaics, sensors, photocatalysis, and photoelectrochemistry, due to their excellent optoelectronic properties. However, their development in photoelectrochemistry for solar fuels and chemicals is hampered by their instability in aqueous environments. In this talk, I will present our recent progress in the protection of halide perovskite-based photoanodes with different sheets of carbon allotropes, namely mesoporous carbon, graphite, glassy carbon, and boron-doped diamond, decorated with electrocatalysts. The protection of a CsPbBr3 photoabsorber film with a mesoporous carbon layer results in photoanodes that last a few hours [1]. Addition of porous graphite sheets increases the stability from hours to days, especially with the addition of water-oxidation NiFeOOH electrocatalyst on the surface of the porous graphite sheet [2]. Longer stabilities of weeks can be achieved by creating porosity gradients with different graphite sheets and by replacing the top graphite sheet upon signs of deterioration. Finally, the best stabilities, projected to be of months, can be realized with more chemically and mechanically stable glassy carbon and boron-doped diamond sheets [3]. These achieve world-record stability: 97% of initial photocurrent close to 8 mA cm-2 is preserved for 210 h under harsh +1.23 V vs RHE of applied bias (stability projection = 10 months). All these carbon allotropes provide the halide perovskites with durable protection, efficient charge separation and transport, electrocatalyst support, and, importantly, photothermal properties for enhanced thermal management, which are invaluable additions for their future development and application of halide perovskite photoelectrochemical devices. References:[1] Poli, I.; Hintermair, U.; Regue, M.; Sackville, E.; Baker, J.; Watson, T.; Eslava, S.; Cameron, P.J. Graphite-protected CsPbBr3 perovskite photoanodes functionalised with water oxidation catalyst for oxygen evolution in water. Nature Comm. 2019, 10, 2097[2] Daboczi, M.; Cui, J.; Temerov, F.; Eslava, S. Scalable All-Inorganic Halide Perovskite Photoanodes with >100 h Operational Stability Containing Earth-Abundant Materials. Adv. Mater. 2023, 2304350[3] Zhu, Z.; Daboczi, M.; Xuan, Y.; Liu, X., Eslava, S. Ultrastable halide perovskite CsPbBr3 photoanodes achieved with electrocatalytic glassy-carbon and boron-doped diamond sheets. Preprint in 10.26434/chemrxiv-2023-bg5wf© FUNDACIO DE LA COMUNITAT VALENCIANA SCITOnanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. 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