Anomalously low activation energy of nanoconfined MgCO3 precipitation

Anomalously low activation energy of nanoconfined MgCO3 precipitation

Magnesite (MgCO3) precipitation within the nanoconfined space of adsorbed H2O films (∼5 monolayers) was determined to have an apparent activation energy of only 36 ± 6 kJ mol−1, suggesting that Mg2+ under nanoconfinement adopts a hydration configuration that mimics that of aqueous Ca2+, at least ene...

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Veröffentlicht in:Chemical communications (Cambridge, England) England), 2019-05, Vol.55 (48), p.6835-6837
Hauptverfasser: Miller, Quin R S, Kaszuba, John P, Schaef, Herbert T, Bowden, Mark E, McGrail, B Peter, Rosso, Kevin M
Format: Artikel
Sprache:eng
Schlagworte:
Activation energy
Calcium carbonate
Calcium ions
Correlation analysis
Hydration
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Magnesite
Magnesium carbonate
Mass spectrometry
Rate constants
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Zusammenfassung:Magnesite (MgCO3) precipitation within the nanoconfined space of adsorbed H2O films (∼5 monolayers) was determined to have an apparent activation energy of only 36 ± 6 kJ mol−1, suggesting that Mg2+ under nanoconfinement adopts a hydration configuration that mimics that of aqueous Ca2+, at least energetically, if not also specifically in hydration structure.
ISSN:1359-7345
1364-548X
DOI:10.1039/c9cc01337g