Understanding the Hydration Process of Salts: The Relation between Surface Mobility and Metastability

Jelle Houben; Dennis Langelaan; Luc Brinkman; Henk Huinink; Hartmut R. Fischer; Olaf C.G. Adan

doi:10.1021/acs.cgd.2c00416

Understanding the Hydration Process of Salts: The Relation between Surface Mobility and Metastability

Jelle Houben
, Dennis Langelaan
, Luc Brinkman
, Henk Huinink (Corresponding author)
, Hartmut R. Fischer
, Olaf C.G. Adan

Research output: Contribution to journal › Article › Academic › peer-review

10 Citations (Scopus)

151 Downloads (Pure)

Abstract

In this work, the relation between mobility and metastability is investigated. This is done under pure water vapor vacuum conditions. First, the properties of the metastable zone under pure water vapor conditions are investigated and compared to those under atmospheric conditions. Second, mobility is investigated using electrochemical impedance spectroscopy, whereby we differentiate between bulk and surface mobility. Using surface mobility, we showed that mobility is a prerequisite for the nucleation of K2CO3. Sufficient mobility must be introduced for the diffusion of ions and water, whereby an increase of almost two orders of magnitude (800 times) is observed on a hydrated sample. It has been shown that the metastable zone is both a consequence of the energy barrier for nucleation and the low ion mobility at low vapor pressures.

Original language	English
Pages (from-to)	4906-4916
Number of pages	11
Journal	Crystal Growth and Design
Volume	22
Issue number	8
DOIs	https://doi.org/10.1021/acs.cgd.2c00416
Publication status	Published - Aug 2022

Funding

This work was funded by the TKI project Dope4Heat with project number 1507201 and the Dutch Organization for Applied Research (TNO). This work reflects only the authors’ view. The authors thank Henry van der Meer for supplying the composite materials used in this work and Hans Dalderop and Jef Noijen for their technical support.

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AU - Huinink, Henk

AU - Fischer, Hartmut R.

AU - Adan, Olaf C.G.

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Understanding the Hydration Process of Salts: The Relation between Surface Mobility and Metastability

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