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Topochemical Transf...
Topochemical Transformation of Two-Dimensional VSe2 into Metallic Nonlayered VO2 for Water Splitting Reactions in Acidic and Alkaline Media
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- Najafi, Leyla (author)
- BeDimens SpA, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.
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- Oropesa-Nuñez, Reinier (author)
- Uppsala universitet,Fasta tillståndets fysik
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- Bellani, Sebastiano (author)
- BeDimens SpA, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.
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- Martin-Garcia, Beatriz (author)
- Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.
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- Pasquale, Lea (author)
- Ist Italiano Tecnol, Mat Characterizat Facil, I-16163 Genoa, Italy.
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- Serri, Michele (author)
- Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.
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- Drago, Filippo (author)
- Ist Italiano Tecnol, Nanochem Dept, I-16163 Genoa, Italy.
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- Luxa, Jan (author)
- Univ Chem & Technol Prague, Dept Inorgan Chem, Prague 166286, Czech Republic.
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- Sofer, Zdenek (author)
- Univ Chem & Technol Prague, Dept Inorgan Chem, Prague 166286, Czech Republic.
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- Sedmidubsky, David (author)
- Univ Chem & Technol Prague, Dept Inorgan Chem, Prague 166286, Czech Republic.
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- Brescia, Rosaria (author)
- Ist Italiano Tecnol, Electron Microscopy Facil, I-16163 Genoa, Italy.
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- Lauciello, Simone (author)
- Ist Italiano Tecnol, Electron Microscopy Facil, I-16163 Genoa, Italy.
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- Zappia, Marilena, I (author)
- BeDimens SpA, I-16163 Genoa, Italy.
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- Shinde, Dipak, V (author)
- Ist Italiano Tecnol, Nanochem Dept, I-16163 Genoa, Italy.
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- Manna, Liberato (author)
- Ist Italiano Tecnol, Nanochem Dept, I-16163 Genoa, Italy.
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- Bonaccorso, Francesco (author)
- BeDimens SpA, I-16163 Genoa, Italy.;Ist Italiano Tecnol, Graphene Labs, I-16163 Genoa, Italy.
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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)
- 2021-12-23
- 2022
- English.
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In: ACS Nano. - : American Chemical Society (ACS). - 1936-0851 .- 1936-086X. ; 16:1, s. 351-367
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Abstract
Subject headings
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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.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- rutile vanadium dioxide
- oxygen evolution reaction
- hydrogen evolution reaction
- water splitting
- electrocatalyst
Publication and Content Type
- ref (subject category)
- art (subject category)
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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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Sedmidubsky, Dav ...
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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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ACS Nano
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Uppsala University