Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101969
Title: Liquid-Phase Exfoliated Indium–Selenide Flakes and Their Application in Hydrogen Evolution Reaction
Authors: Petroni, E.
Lago, E.
Bellani, S.
Boukhvalov, D. W.
Politano, A.
Gürbulak, B.
Duman, S.
Prato, M.
Gentiluomo, S.
Oropesa-Nuñez, R.
Panda, J. -K.
Toth, P. S.
Del Rio Castillo, A. E.
Pellegrini, V.
Bonaccorso, F.
Issue Date: 2018
Publisher: Wiley-VCH Verlag
Citation: Liquid-Phase Exfoliated Indium–Selenide Flakes and Their Application in Hydrogen Evolution Reaction / E. Petroni, E. Lago, S. Bellani, et al. — DOI 10.1002/smll.201800749 // Small. — 2018. — Vol. 14. — Iss. 26. — 1800749.
Abstract: Single- and few-layered InSe flakes are produced by the liquid-phase exfoliation of β-InSe single crystals in 2-propanol, obtaining stable dispersions with a concentration as high as 0.11 g L−1. Ultracentrifugation is used to tune the morphology, i.e., the lateral size and thickness of the as-produced InSe flakes. It is demonstrated that the obtained InSe flakes have maximum lateral sizes ranging from 30 nm to a few micrometers, and thicknesses ranging from 1 to 20 nm, with a maximum population centered at ≈5 nm, corresponding to 4 Se–In–In–Se quaternary layers. It is also shown that no formation of further InSe-based compounds (such as In2Se3) or oxides occurs during the exfoliation process. The potential of these exfoliated-InSe few-layer flakes as a catalyst for the hydrogen evolution reaction (HER) is tested in hybrid single-walled carbon nanotubes/InSe heterostructures. The dependence of the InSe flakes' morphologies, i.e., surface area and thickness, on the HER performances is highlighted, achieving the best efficiencies with small flakes offering predominant edge effects. The theoretical model unveils the origin of the catalytic efficiency of InSe flakes, and correlates the catalytic activity to the Se vacancies at the edge of the flakes. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Keywords: ELECTROCATALYSIS
HYDROGEN EVOLUTION REACTION
INDIUM SELENIDE
LIQUID-PHASE EXFOLIATION
WATER SPLITTING
CATALYST ACTIVITY
EFFICIENCY
ELECTROCATALYSIS
LIQUIDS
SELENIUM COMPOUNDS
SINGLE CRYSTALS
SINGLE-WALLED CARBON NANOTUBES (SWCN)
YARN
CATALYTIC EFFICIENCIES
EXFOLIATION PROCESS
HYDROGEN EVOLUTION REACTIONS
INDIUM SELENIDE
LIQUID PHASE
THEORETICAL MODELING
ULTRACENTRIFUGATION
WATER SPLITTING
INDIUM COMPOUNDS
URI: http://hdl.handle.net/10995/101969
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85049046689
PURE ID: 7420208
678c8945-7b3c-4f5b-9bee-3d2739c8088b
ISSN: 16136810
DOI: 10.1002/smll.201800749
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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