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Journal article
Tuning the Microenvironment of Water Confined in Ti 3 C 2 T x MXene by Cation Intercalation
Journal of physical chemistry. C, v 128(7), pp 2803-2813
13 Feb 2024
PMID: 38414833
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The local microenvironment has recently been found to play a major role in the electrocatalytic activity of nanomaterials. Modulating the microenvironment by adding alkali metal cations into the electrolyte can be used to either suppress hydrogen or oxygen evolution, thereby extending the electrochemical window of energy storage systems, or to tune the selectivity of electrocatalysts. MXenes are a large family of two-dimensional transition metal carbides, nitrides, and carbonitrides that have shown potential for use in electrochemical energy storage applications. Due to their negatively charged surfaces, MXenes can accommodate cations and water molecules between the layers. Nevertheless, the nature of the aqueous microenvironment in the MXene interlayer space is poorly understood. Here, we apply Fourier transform infrared spectroscopy (FTIR) to probe the hydrogen bonding of intercalated water in Ti
C
T
as a function of intercalated cation and relative humidity. Substantial changes in the FTIR spectra after cation exchange demonstrate that the hydrogen bonding of water molecules confined between the MXene layers is strongly cation-dependent. Furthermore, the IR absorbance of the confined water correlates with resistivity estimated by 4-point probe measurements and interlayer distance calculated from XRD patterns. This work demonstrates that cation intercalation strongly modulates the confined microenvironment, which can be used to tune the activity or selectivity of electrochemical reactions in the interlayer space of MXenes in the future.
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Details
- Title
- Tuning the Microenvironment of Water Confined in Ti 3 C 2 T x MXene by Cation Intercalation
- Creators
- Mailis Lounasvuori - Helmholtz-Zentrum Berlin für Materialien und EnergieTeng Zhang - Drexel UniversityYury Gogotsi - Drexel UniversityTristan Petit - Helmholtz-Zentrum Berlin für Materialien und Energie
- Publication Details
- Journal of physical chemistry. C, v 128(7), pp 2803-2813
- Publisher
- American Chemical Society
- Number of pages
- 11
- Grant note
- no. 89592 , Volkswagen Foundation: 89592 Volkswagen Foundation (Freigeist Fellowship): 947852 European Research Council (ERC) under the European Union: DE-SC0018618 US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences
This project has received funding from the Volkswagen Foundation (Freigeist Fellowship no. 89592), the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement no. 947852), and the US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (grant no. DE-SC0018618). The authors thank Nico Grimm at the Helmholtz-Zentrum Berlin for his help with the experiments.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:001167240000001
- Scopus ID
- 2-s2.0-85185573033
- Other Identifier
- 991021854756104721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology