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Electroswitchable noble-metal-free catalysis for molecular solar thermal systems

Molecular solar thermal (MOST) systems convert solar energy into chemical energy via a simple unimolecular reaction, enabling efficient energy storage. However, controlling the energy release remains a challenge. Here, we present an electroswitchable, noble-metal-free hybrid catalyst that enables en...

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Bibliographic Details
Main Authors: Franz, Evanie (Author) , Fickenscher, Georg (Author) , Schulze, Erik J. (Author) , Krappmann, Daniel (Author) , Weidlich, Anna (Author) , Luchs, Tobias (Author) , Dreuw, Andreas (Author) , Hirsch, Andreas (Author) , Brummel, Olaf (Author) , Libuda, Jörg (Author)
Format: Article (Journal) Editorial
Language:English
Published: 11 July 2025
In: ACS energy letters
Year: 2025, Volume: 10, Issue: 7, Pages: 3196-3202
ISSN:2380-8195
DOI:10.1021/acsenergylett.5c01341
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/acsenergylett.5c01341
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Author Notes:Evanie Franz, Georg Fickenscher, Erik J. Schulze, Daniel Krappmann, Anna Weidlich, Tobias Luchs, Andreas Dreuw, Andreas Hirsch, Olaf Brummel, and Jörg Libuda
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Summary:Molecular solar thermal (MOST) systems convert solar energy into chemical energy via a simple unimolecular reaction, enabling efficient energy storage. However, controlling the energy release remains a challenge. Here, we present an electroswitchable, noble-metal-free hybrid catalyst that enables energy release with high activity and selectivity. The MOST system is p-methoxyphenyl-ethyl ester-norbornadiene (mPENBD), which is photoconverted to its energy-rich quadricyclane isomer (mPEQC). A CoII porphyrin derivative, anchored as a self-assembled monolayer (SAM) on an atomically defined Co3O4(111) electrode, catalyzes the back-conversion of mPEQC to mPENBD with exceptional selectivity. Over 100 cycles, no side products were detected, and only minimal deactivation occurred. Most importantly, catalytic activity can be switched on and off via electrode potential due to the reversible conversion between an active CoII porphyrin SAM and an inactive CoI porphyrin SAM. This electroswitchable catalyst enables precise control of energy release in MOST-based solar energy storage systems.
Item Description:Online veröffentlicht: 13. Juni 2025
Gesehen am 16.10.2025
Physical Description:Online Resource
ISSN:2380-8195
DOI:10.1021/acsenergylett.5c01341

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