Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Covalently functionalized layered MoS2 supported Pd nanoparticles as highly active oxygen reduction electrocatalysts
Δημιουργός/Συγγραφέας:	Perivoliotis, Dimitrios K Sato, Yuta Suenaga, Kazu [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos
Εκδότης:	Royal Society of Chemistry
Ημερομηνία:	2020-09-17
Γλώσσα:	Αγγλικά
DOI:	10.1039/d0nr04446f
Άλλο:	32857099
Περίληψη:	Molybdenum disulfide nanosheets covalently modified with a 1,2-dithiolane derivative were used as a novel substrate for the immobilization of Pd nanoparticles (PdNPs) towards the development of a highly efficient hybrid electrocatalyst, namely PdNPs/f-MoS2, for the oxygen reduction in an alkaline medium. The newly prepared hybrid material was thoroughly characterized through complementary techniques such as Raman and IR spectroscopy, TGA, HRTEM, STEM/EELS, and EDS. The PdNPs/f-MoS2 nanohybrid exhibited excellent performance towards oxygen electroreduction with a positive onset potential of +0.066 V and a half-wave potential of -0.116 V vs. Hg/HgO, along with a high current response, which are superior to those of its graphene counterpart and comparable to those of the benchmark Pd/C product. Moreover, PdNPs/f-MoS2 was proved to be remarkably stable as chronoamperometric assays showed minimum activity loss among the tested materials, clearly outperforming the commercial catalyst. The excellent performance of PdNPs/f-MoS2 is attributable to (i) the high affinity of the catalytic PdNPs with the f-MoS2 substrate, (ii) the absence of any capping agent for the stabilization of PdNPs onto f-MoS2, and more importantly (iii) the preservation of the integrity of the MoS2 basal plane during the functionalization process. Lastly, the oxygen reduction on PdNPs/f-MoS2 proceeded through the energy efficient four-electron pathway, showing great potential for the use of layered transition metal dichalcogenides in energy conversion applications, comprising fuel cells.
Τίτλος πηγής δημοσίευσης:	Nanoscale
Τόμος/Κεφάλαιο:	12
Τεύχος:	35
Σελίδες:	18278–18288
Θεματική Κατηγορία:	[EL] Χημεία (Γενικά)[EN] Chemistry (General) [EL] Φασματοσκοπία[EN] Spectroscopy
Λέξεις-Κλειδιά:	MoS2 Nanoparticles Oxygen reduction electrocatalyst Hybrid Electrocatalyst Graphene Transition metal dichalcogenides (TMDs)
Κάτοχος πνευματικών δικαιωμάτων:	Copyright © 2020 The Royal Society of Chemistry
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://pubs.rsc.org/en/content/articlelanding/2020/nr/d0nr04446f
Ηλεκτρονική διεύθυνση περιοδικού (link) :	https://pubs.rsc.org/en/journals/journalissues/nr#!recentarticles&adv
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο