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Electronic Interactions in Illuminated Carbon Dot/MoS2 Ensembles and Electrocatalytic Activity towards Hydrogen Evolution

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Electronic Interactions in Illuminated Carbon Dot/MoS2 Ensembles and Electrocatalytic Activity towards Hydrogen Evolution
Canton‐Vitoria, Ruben
Vallan, Lorenzo
Ταγματάρχης, Νίκος
Urriolabeitia, Esteban
Benito, Ana M.
Maser, Wolfgang K.
Άρθρο σε επιστημονικό περιοδικό
2018
The preparation, characterization, and photophysical and electrocatalytic properties of carbon dot (CD)/MoS2 ensembles is reported. Based on electrostatic interactions, ammonium‐functionalized MoS2, which was prepared upon reaction of 1,2‐dithiolane tert‐butyl carbamate with MoS2 followed by acidic deprotection, was coupled with CDs bearing multiple carboxylates on their periphery, as derived upon microwave‐assisted polycondensation of citric acid and ethylenediamine followed by alkaline treatment. Insights into electronic interactions between the two species within CD/MoS2 ensembles emanated from absorption and photoluminescence titration assays. Efficient fluorescence quenching of CDs by MoS2 was observed and attributed to photoinduced electron/energy transfer as the decay mechanism for the transduction of the singlet excited state of CDs. Finally, the electrocatalytic performance of the CD/MoS2 ensemble was assessed towards the hydrogen evolution reaction and found to be superior to that of individual CDs species.
Χημεία (Γενικά) (EL)
Chemistry (General) (EN)
Donor–acceptor systems (EL)
Energy conversion (EL)
Chalcogens (EL)
Carbon dots (EL)
Photochemistry (EL)
English
Wiley
Chemistry – A European Journal
Copyright © Copyright © WILEY-VCH Verlag GmbH & Co. KGaA
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.el
National Hellenic Research Foundation (NHRF)
Helios - Repository of the National Hellenic Research Foundation (NHRF)



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