Anomalously low activation energy of nanoconfined MgCO3 precipitation

Quin R. S. Miller; John P. Kaszuba; Herbert T. Schaef; Mark E. Bowden; B. Peter McGrail; Kevin M. Rosso

doi:10.1039/C9CC01337G

You do not have JavaScript enabled. Please enable JavaScript to access the full features of the site or access our non-JavaScript page.

Anomalously low activation energy of nanoconfined MgCO₃ precipitation†

Quin R. S. Miller,

*^ab John P. Kaszuba,

^ac Herbert T. Schaef,

^b Mark E. Bowden,

^d B. Peter McGrail^e and Kevin M. Rosso

Author affiliations

* Corresponding authors

^a Department of Geology and Geophysics, University of Wyoming, 1000 E. University Avenue, Laramie, WY 82071, USA

^b Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, P. O. Box 999, MS K8-98, Richland, WA 99352, USA
E-mail: QuinRS.Miller@pnnl.gov

^c School of Energy Resources, University of Wyoming, 1000 E. University Avenue, Laramie, WY 82071, USA

^d William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P. O. Box 999, MS K8-98, Richland, WA 99352, USA

^e Energy and Environment Directorate, Pacific Northwest National Laboratory, P. O. Box 999, MS K8-98, Richland, WA 99352, USA

Abstract

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.

Download options Please wait...

Supplementary files

Supplementary information PDF (698K)

Article information

DOI: https://doi.org/10.1039/C9CC01337G
Article type: Communication
Submitted: 15 Feb 2019
Accepted: 20 May 2019
First published: 29 May 2019

Download Citation

Chem. Commun., 2019,55, 6835-6837

Author version available

Download author version (PDF)

Permissions

Request permissions

Anomalously low activation energy of nanoconfined MgCO₃ precipitation

Q. R. S. Miller, J. P. Kaszuba, H. T. Schaef, M. E. Bowden, B. P. McGrail and K. M. Rosso, Chem. Commun., 2019, 55, 6835 DOI: 10.1039/C9CC01337G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Social activity

Fetching data from CrossRef.
This may take some time to load.

Chemical Communications