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Clearing Up Discrep...
Clearing Up Discrepancies in 2D and 3D Nickel Molybdate Hydrate Structures
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- Dürr, Robin N. (författare)
- Uppsala universitet,Fysikalisk kemi,Université Paris-Saclay,Hammarström
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- Maltoni, Pierfrancesco (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Feng, Shihui, 1994- (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Ghorai, Sagar (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Ström, Petter (författare)
- Uppsala universitet,Tillämpad kärnfysik
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- Tai, Cheuk-Wai, 1973- (författare)
- Stockholms universitet,Avdelningen för oorganisk kemi och strukturkemi
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- Araujo, Rafael (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Edvinsson, Tomas, Professor, 1970- (författare)
- Uppsala universitet,Fasta tillståndets fysik
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(creator_code:org_t)
- American Chemical Society (ACS), 2024
- 2024
- Engelska.
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Ingår i: Inorganic Chemistry. - : American Chemical Society (ACS). - 0020-1669 .- 1520-510X. ; 63:5
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- When electrocatalysts are prepared, modification of the morphology is a common strategy to enhance their electrocatalytic performance. In this work, we have examined and characterized nanorods (3D) and nanosheets (2D) of nickel molybdate hydrates, which previously have been treated as the same material with just a variation in morphology. We thoroughly investigated the materials and report that they contain fundamentally different compounds with different crystal structures, chemical compositions, and chemical stabilities. The 3D nanorod structure exhibits the chemical formula NiMoO4·0.6H2O and crystallizes in a triclinic system, whereas the 2D nanosheet structures can be rationalized with Ni3MoO5–0.5x(OH)x·(2.3 – 0.5x)H2O, with a mixed valence of both Ni and Mo, which enables a layered crystal structure. The difference in structure and composition is supported by X-ray photoelectron spectroscopy, ion beam analysis, thermogravimetric analysis, X-ray diffraction, electron diffraction, infrared spectroscopy, Raman spectroscopy, and magnetic measurements. The previously proposed crystal structure for the nickel molybdate hydrate nanorods from the literature needs to be reconsidered and is here refined by ab initio molecular dynamics on a quantum mechanical level using density functional theory calculations to reproduce the experimental findings. Because the material is frequently studied as an electrocatalyst or catalyst precursor and both structures can appear in the same synthesis, a clear distinction between the two compounds is necessary to assess the underlying structure-to-function relationship and targeted electrocatalytic properties.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- nickel molybdate hydrate; nanorods
- nanosheets layered nickel molybdate
- α-NiMoO4
- molybdenum leaching
- Raman spectroscopy
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Dürr, Robin N.
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Maltoni, Pierfra ...
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Feng, Shihui, 19 ...
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Ghorai, Sagar
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Ström, Petter
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Tai, Cheuk-Wai, ...
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visa fler...
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Araujo, Rafael
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Edvinsson, Tomas ...
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Oorganisk kemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Materialkemi
- Artiklar i publikationen
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Inorganic Chemis ...
- Av lärosätet
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Uppsala universitet
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Stockholms universitet