Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/117835
Title: Tailoring the Surface Chemical Reactivity of Transition-Metal Dichalcogenide PtTe2 Crystals
Authors: Politano, A.
Chiarello, G.
Kuo, C. -N.
Lue, C. S.
Edla, R.
Torelli, P.
Pellegrini, V.
Boukhvalov, D. W.
Issue Date: 2018
Publisher: Wiley-VCH Verlag
Citation: Tailoring the Surface Chemical Reactivity of Transition-Metal Dichalcogenide PtTe2 Crystals / A. Politano, G. Chiarello, C. -N. Kuo et al. // Advanced Functional Materials. — 2018. — Vol. 28. — Iss. 15. — 1706504.
Abstract: PtTe2 is a novel transition-metal dichalcogenide hosting type-II Dirac fermions that displays application capabilities in optoelectronics and hydrogen evolution reaction. Here it is shown, by combining surface science experiments and density functional theory, that the pristine surface of PtTe2 is chemically inert toward the most common ambient gases (oxygen and water) and even in air. It is demonstrated that the creation of Te vacancies leads to the appearance of tellurium-oxide phases upon exposing defected PtTe2 surfaces to oxygen or ambient atmosphere, which is detrimental for the ambient stability of uncapped PtTe2-based devices. On the contrary, in PtTe2 surfaces modified by the joint presence of Te vacancies and substitutional carbon atoms, the stable adsorption of hydroxyl groups is observed, an essential step for water splitting and the water–gas shift reaction. These results thus pave the way toward the exploitation of this class of Dirac materials in catalysis. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Keywords: DENSITY FUNCTIONAL THEORY
SURFACE SCIENCE
TRANSITION-METAL DICHALCOGENIDES
VIBRATIONAL SPECTROSCOPY
X-RAY PHOTOELECTRON SPECTROSCOPY
CARBON
CHEMICAL SHIFT
CHROMIUM COMPOUNDS
DENSITY FUNCTIONAL THEORY
DENSITY OF GASES
TELLURIUM COMPOUNDS
TRANSITION METALS
VIBRATIONAL SPECTROSCOPY
WATER GAS SHIFT
X RAY PHOTOELECTRON SPECTROSCOPY
AMBIENT ATMOSPHERE
APPLICATION CAPABILITY
HYDROGEN EVOLUTION REACTIONS
PRISTINE SURFACES
SURFACE CHEMICAL REACTIVITY
SURFACE SCIENCE
TRANSITION METAL DICHALCOGENIDES
WATER GAS SHIFT (WGS) REACTION
PLATINUM COMPOUNDS
URI: http://hdl.handle.net/10995/117835
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85041697938
ISSN: 1616301X
DOI: 10.1002/adfm.201706504
metadata.dc.description.sponsorship: Horizon 2020 Framework Programme, H2020: 696656-GrapheneCore1
A.P. and G.C. thank Vito Fabio for technical support and Marilena Zappia for having participated in HREELS experiments. This work was partly performed in the framework of the Nanoscience Foundry and Fine Analysis (NFFA-MIUR Italy Progetti Internazionali) project under Proposal No. 2017004. This project received funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 696656-GrapheneCore1.
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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