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Topochemical Transf...
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Najafi, LeylaBeDimens SpA, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.
(author)
Topochemical Transformation of Two-Dimensional VSe2 into Metallic Nonlayered VO2 for Water Splitting Reactions in Acidic and Alkaline Media
- Article/chapterEnglish2022
Publisher, publication year, extent ...
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2021-12-23
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American Chemical Society (ACS),2022
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:uu-472940
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-472940URI
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https://doi.org/10.1021/acsnano.1c06662DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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The engineering of the structural and morphological properties of nanomaterials is a fundamental aspect to attain desired performance in energy storage/conversion systems and multifunctional composites. We report the synthesis of room temperature-stable metallic rutile VO2 (VO2 (R)) nanosheets by topochemically transforming liquid-phase exfoliated VSe2 in a reductive Ar-H2 atmosphere. The asproduced VO2 (R) represents an example of two-dimensional (2D) nonlayered materials, whose bulk counterparts do not have a layered structure composed by layers held together by van der Waals force or electrostatic forces between charged layers and counterbalancing ions amid them. By pretreating the VSe2 nanosheets by O-2 plasma, the resulting 2D VO2 (R) nanosheets exhibit a porous morphology that increases the material specific surface area while introducing defective sites. The assynthesized porous (holey)-VO2 (R) nanosheets are investigated as metallic catalysts for the water splitting reactions in both acidic and alkaline media, reaching a maximum mass activity of 972.3 A g(-1) at -0.300 V vs RHE for the hydrogen evolution reaction (HER) in 0.5 M H2SO4 (faradaic efficiency = 100%, overpotential for the HER at 10 mA cm(-2) = 0.184 V) and a mass activity (calculated for a non 100% faradaic efficiency) of 745.9 A g(-1) at +1.580 V vs RHE for the oxygen evolution reaction (OER) in 1 M KOH (overpotential for the OER at 10 mA cm(-2) = 0.209 V). By demonstrating proof-of-concept electrolyzers, our results show the possibility to synthesize special material phases through topochemical conversion of 2D materials for advanced energy-related applications.
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Oropesa-Nuñez, ReinierUppsala universitet,Fasta tillståndets fysik(Swepub:uu)reior263
(author)
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Bellani, SebastianoBeDimens SpA, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.
(author)
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Martin-Garcia, BeatrizIst Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.
(author)
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Pasquale, LeaIst Italiano Tecnol, Mat Characterizat Facil, I-16163 Genoa, Italy.
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Serri, MicheleIst Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.
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Drago, FilippoIst Italiano Tecnol, Nanochem Dept, I-16163 Genoa, Italy.
(author)
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Luxa, JanUniv Chem & Technol Prague, Dept Inorgan Chem, Prague 166286, Czech Republic.
(author)
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Sofer, ZdenekUniv Chem & Technol Prague, Dept Inorgan Chem, Prague 166286, Czech Republic.
(author)
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Sedmidubsky, DavidUniv Chem & Technol Prague, Dept Inorgan Chem, Prague 166286, Czech Republic.
(author)
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Brescia, RosariaIst Italiano Tecnol, Electron Microscopy Facil, I-16163 Genoa, Italy.
(author)
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Lauciello, SimoneIst Italiano Tecnol, Electron Microscopy Facil, I-16163 Genoa, Italy.
(author)
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Zappia, Marilena, IBeDimens SpA, I-16163 Genoa, Italy.
(author)
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Shinde, Dipak, VIst Italiano Tecnol, Nanochem Dept, I-16163 Genoa, Italy.
(author)
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Manna, LiberatoIst Italiano Tecnol, Nanochem Dept, I-16163 Genoa, Italy.
(author)
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Bonaccorso, FrancescoBeDimens SpA, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.
(author)
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BeDimens SpA, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.Fasta tillståndets fysik
(creator_code:org_t)
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In:ACS Nano: American Chemical Society (ACS)16:1, s. 351-3671936-08511936-086X
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Najafi, Leyla
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Oropesa-Nuñez, R ...
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Bellani, Sebasti ...
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Martin-Garcia, B ...
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Pasquale, Lea
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Serri, Michele
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Drago, Filippo
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Luxa, Jan
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Sofer, Zdenek
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Brescia, Rosaria
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Lauciello, Simon ...
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Zappia, Marilena ...
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Shinde, Dipak, V
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Manna, Liberato
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Bonaccorso, Fran ...
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