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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 ...

  • 2021-12-23
  • American Chemical Society (ACS),2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-472940
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-472940URI
  • https://doi.org/10.1021/acsnano.1c06662DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • 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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Added entries (persons, corporate bodies, meetings, titles ...)

  • Oropesa-Nuñez, ReinierUppsala universitet,Fasta tillståndets fysik(Swepub:uu)reior263 (author)
  • Bellani, SebastianoBeDimens SpA, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy. (author)
  • Martin-Garcia, BeatrizIst Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy. (author)
  • Pasquale, LeaIst Italiano Tecnol, Mat Characterizat Facil, I-16163 Genoa, Italy. (author)
  • Serri, MicheleIst Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy. (author)
  • Drago, FilippoIst Italiano Tecnol, Nanochem Dept, I-16163 Genoa, Italy. (author)
  • Luxa, JanUniv Chem & Technol Prague, Dept Inorgan Chem, Prague 166286, Czech Republic. (author)
  • Sofer, ZdenekUniv Chem & Technol Prague, Dept Inorgan Chem, Prague 166286, Czech Republic. (author)
  • Sedmidubsky, DavidUniv Chem & Technol Prague, Dept Inorgan Chem, Prague 166286, Czech Republic. (author)
  • Brescia, RosariaIst Italiano Tecnol, Electron Microscopy Facil, I-16163 Genoa, Italy. (author)
  • Lauciello, SimoneIst Italiano Tecnol, Electron Microscopy Facil, I-16163 Genoa, Italy. (author)
  • Zappia, Marilena, IBeDimens SpA, I-16163 Genoa, Italy. (author)
  • Shinde, Dipak, VIst Italiano Tecnol, Nanochem Dept, I-16163 Genoa, Italy. (author)
  • Manna, LiberatoIst Italiano Tecnol, Nanochem Dept, I-16163 Genoa, Italy. (author)
  • Bonaccorso, FrancescoBeDimens SpA, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy. (author)
  • BeDimens SpA, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.Fasta tillståndets fysik (creator_code:org_t)

Related titles

  • In:ACS Nano: American Chemical Society (ACS)16:1, s. 351-3671936-08511936-086X

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