4.7 Article

Anomalously low activation energy of nanoconfined MgCO3 precipitation

期刊

CHEMICAL COMMUNICATIONS
卷 55, 期 48, 页码 6835-6837

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ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cc01337g

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  1. U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES), Chemical Sciences, Geosciences, and Biosciences Division through its Geosciences program at Pacific Northwest National Laboratory (PNNL)
  2. U.S. Department of Energy Office of Fossil Energy at PNNL through the National Energy Technology Laboratory, Morgantown, West Virginia
  3. University of Wyoming (UW) Department of Geology and Geophysics
  4. University of Wyoming (UW) School of Energy Resources
  5. University of Wyoming School of Energy Resources
  6. Nielson Energy Fellowship

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Magnesite (MgCO3) precipitation within the nanoconfined space of adsorbed H2O films (similar to 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.

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