Carbonate–Hydrogenocarbonate Coexistence and Dynamics in Layered Double Hydroxides

Carbonated layered double hydroxides were fully characterized by vibrational spectroscopies, powder X-ray diffraction and solid-state NMR tuning the cations, the layer charge density, and the preparation method to get original structural and dynamical features within the materials. It clearly appear...

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Bibliographic Details
Published inJournal of physical chemistry. C Vol. 121; no. 11; pp. 6104 - 6112
Main Authors Di Bitetto, Arnaud, Kervern, Gwendal, André, Erwan, Durand, Pierrick, Carteret, Cédric
Format Journal Article
LanguageEnglish
Published American Chemical Society 23.03.2017
Subjects
Chemical Sciences
Material chemistry
or physical chemistry
Theoretical and
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Summary:Carbonated layered double hydroxides were fully characterized by vibrational spectroscopies, powder X-ray diffraction and solid-state NMR tuning the cations, the layer charge density, and the preparation method to get original structural and dynamical features within the materials. It clearly appears that carbonate and hydrogenocarbonate coexist in the same interlayer after contact with air and also that the hydrogenocarbonate quantity is correlated to the MII/MIII molar ratio constituting a strong pH probe of the interlayer space. Likewise, these two species are involved in an exchange process with atmospheric carbon dioxide, and hydrogenocarbonate proves to be the key parameter of exchange kinetics. These crucial results, extended to various cationic couples, could lead to new alternatives for carbon dioxide storage.
ISSN:1932-7447
1932-7455
DOI:10.1021/acs.jpcc.6b12192