Alcohol-mediated self-assembly of mesoporous transition-metal pyrophosphates and phosphates: transformation to metal hydroxides and alkaline OER performance.
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| Title: | Alcohol-mediated self-assembly of mesoporous transition-metal pyrophosphates and phosphates: transformation to metal hydroxides and alkaline OER performance. |
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| Authors: | Ceran, Gözde1 (AUTHOR), Karakaya Durukan, Irmak1 (AUTHOR), Dag, Ömer1,2 (AUTHOR) dag@fen.bilkent.edu.tr |
| Source: | Dalton Transactions: An International Journal of Inorganic Chemistry. 3/17/2026, Vol. 55 Issue 11, p4601-4620. 20p. |
| Subjects: | Pyrophosphates, Oxygen evolution reactions, Hydroxides, Sol-gel processes, Molecular self-assembly, Electrochemical analysis, Alkalinization, Mesoporous materials |
| Abstract: | The sol–gel process offers a scalable route to mesoporous materials whose nanoarchitecture can be tuned by controlling the reaction medium. Here, methanol, ethanol, and butanol were used to regulate the reactivity and self-assembly of transition-metal nitrates, pyrophosphoric acid (PPA), and Pluronic® P123. Clear precursor solutions formed mesostructured (M2HxP2O7(NO3)x·yH2O)n–P123 intermediates (M = Mn, Co, Ni) via precipitation or gelation during solvent evaporation. The solution, precipitate, and supernatant fractions were isolated, characterized, and calcined to yield mesoporous products. Solution- and precipitate-derived samples produced amorphous mesoporous M2P2O7 that crystallized at elevated temperatures, whereas the supernatant yielded mesoporous M3(PO4)2. Mesoporous Ni2P2O7 exhibited the highest surface area (410 m2 g−1) and most uniform pore size (5.3 nm), followed by Co2P2O7, while Mn2P2O7 was least favourable, reflecting solvent-dependent sol–gel behaviour. Electrodes fabricated on FTO and graphite and tested in 1 M KOH showed limited stability on FTO but good stability on graphite, except for Mn2P2O7, which underwent Mn(VI) disproportionation. The most stable and OER-active electrodes originated from the Co(II) supernatant. However, all metal phosphate and metal pyrophosphate electrodes transformed into metal hydroxides under alkaline conditions, indicating that the observed electrochemical activity arises from the metal hydroxide phases. [ABSTRACT FROM AUTHOR] |
| Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 192349620 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Alcohol-mediated self-assembly of mesoporous transition-metal pyrophosphates and phosphates: transformation to metal hydroxides and alkaline OER performance. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ceran%2C+Gözde%22">Ceran, Gözde</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Karakaya+Durukan%2C+Irmak%22">Karakaya Durukan, Irmak</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dag%2C+Ömer%22">Dag, Ömer</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> dag@fen.bilkent.edu.tr</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Dalton+Transactions%3A+An+International+Journal+of+Inorganic+Chemistry%22">Dalton Transactions: An International Journal of Inorganic Chemistry</searchLink>. 3/17/2026, Vol. 55 Issue 11, p4601-4620. 20p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Pyrophosphates%22">Pyrophosphates</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+evolution+reactions%22">Oxygen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Hydroxides%22">Hydroxides</searchLink><br /><searchLink fieldCode="DE" term="%22Sol-gel+processes%22">Sol-gel processes</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+self-assembly%22">Molecular self-assembly</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+analysis%22">Electrochemical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Alkalinization%22">Alkalinization</searchLink><br /><searchLink fieldCode="DE" term="%22Mesoporous+materials%22">Mesoporous materials</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The sol–gel process offers a scalable route to mesoporous materials whose nanoarchitecture can be tuned by controlling the reaction medium. Here, methanol, ethanol, and butanol were used to regulate the reactivity and self-assembly of transition-metal nitrates, pyrophosphoric acid (PPA), and Pluronic® P123. Clear precursor solutions formed mesostructured (M2HxP2O7(NO3)x·yH2O)n–P123 intermediates (M = Mn, Co, Ni) via precipitation or gelation during solvent evaporation. The solution, precipitate, and supernatant fractions were isolated, characterized, and calcined to yield mesoporous products. Solution- and precipitate-derived samples produced amorphous mesoporous M2P2O7 that crystallized at elevated temperatures, whereas the supernatant yielded mesoporous M3(PO4)2. Mesoporous Ni2P2O7 exhibited the highest surface area (410 m2 g−1) and most uniform pore size (5.3 nm), followed by Co2P2O7, while Mn2P2O7 was least favourable, reflecting solvent-dependent sol–gel behaviour. Electrodes fabricated on FTO and graphite and tested in 1 M KOH showed limited stability on FTO but good stability on graphite, except for Mn2P2O7, which underwent Mn(VI) disproportionation. The most stable and OER-active electrodes originated from the Co(II) supernatant. However, all metal phosphate and metal pyrophosphate electrodes transformed into metal hydroxides under alkaline conditions, indicating that the observed electrochemical activity arises from the metal hydroxide phases. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1039/d6dt00072j Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 20 StartPage: 4601 Subjects: – SubjectFull: Pyrophosphates Type: general – SubjectFull: Oxygen evolution reactions Type: general – SubjectFull: Hydroxides Type: general – SubjectFull: Sol-gel processes Type: general – SubjectFull: Molecular self-assembly Type: general – SubjectFull: Electrochemical analysis Type: general – SubjectFull: Alkalinization Type: general – SubjectFull: Mesoporous materials Type: general Titles: – TitleFull: Alcohol-mediated self-assembly of mesoporous transition-metal pyrophosphates and phosphates: transformation to metal hydroxides and alkaline OER performance. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ceran, Gözde – PersonEntity: Name: NameFull: Karakaya Durukan, Irmak – PersonEntity: Name: NameFull: Dag, Ömer IsPartOfRelationships: – BibEntity: Dates: – D: 17 M: 03 Text: 3/17/2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 14779226 Numbering: – Type: volume Value: 55 – Type: issue Value: 11 Titles: – TitleFull: Dalton Transactions: An International Journal of Inorganic Chemistry Type: main |
| ResultId | 1 |
