Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Terpyridine-functionalized single-walled carbon nanotubes towards selectivity in the oxygen reduction reaction
Δημιουργός/Συγγραφέας:	Sideri, Ioanna K. Arenal, Raul [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos
Ημερομηνία:	2025-06-04
Γλώσσα:	Αγγλικά
DOI:	10.1039/d5na00281h
Άλλο:	40510909
Περίληψη:	Single-walled carbon nanotubes (SWCNTs) have been widely employed as electrocatalysts due to their exceptional mechanical strength and electronic properties, despite lacking intrinsic catalytic centers. Current research efforts focus on enhancing their catalytic activity by modifying them with organometallic chelate complexes, to achieve controlled molecular-level structuring and improved performance in Proton Exchange Membrane Fuel Cells (PEMFCs). While the mechanistic understanding of their electrocatalytic behavior in relation to molecular structure remains in its early stages, it offers valuable insights for the development of efficient electrocatalysts. In this study, SWCNTs were stepwise chemically modified with terpyridine ligands both in the absence of metal and in the presence of ruthenium (Ru) in two different oxidation states. The resulting SWCNT-based nanomaterials were characterized using Raman, UV-Vis, XPS and energy-dispersive X-ray spectroscopy (EDS) coupled with transmission electron microscopy (TEM) imaging, while the degree of functionalization was assessed through thermogravimetric analysis (TGA). A comprehensive electrocatalytic investigation demonstrated how covalent modification with Ru2+ and Ru3+ terpyridine complexes influences the mechanistic pathway of the oxygen reduction reaction (ORR). This comparative analysis underscores the critical role of the first coordination sphere of precious metals in both the thermodynamics and kinetics of ORR, when anchored onto carbon nanomaterial lattices, providing valuable insights for the nanostructured design of efficient carbon-based electrocatalysts.
Τίτλος πηγής δημοσίευσης:	Nanoscale advances
Θεματική Κατηγορία:	[EL] Νανοτεχνολογία[EN] Nanotechnology [EL] Αναλυτική χημεία[EN] Analytical chemistry
Λέξεις-Κλειδιά:	Single-walled carbon nanotubes (SWCNTs) Oxygen Reduction Reaction (ORR) terpyridine functionalization electrocatalysts ruthenium complexes
Χρηματοδότης:	European Union Government of Aragon (DGA)
EU Grant identifier:	101084131 PRTR-C17.I1 E13 23R PID2023-151080NB-I00/AEI/10.13039/501100011033 and CEX2023-001286-S MICIU/AEI/10.13039/501100011033
Όροι και προϋποθέσεις δικαιωμάτων:	This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1039/D5NA00281H
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο