Volltext-Downloads (blau) und Frontdoor-Views (grau)

Nuclear magnetic resonance study of ion adsorption on microporous carbide-derived carbon

  • A detailed understanding of ion adsorption within porous carbon is key to the design and improvement of electric double-layer capacitors, more commonly known as supercapacitors. In this work nuclear magnetic resonance (NMR) spectroscopy is used to study ion adsorption in porous carbide-derived carbons. These predominantly microporous materials have a tuneable pore size which enables a systematic study of the effect of pore size on ion adsorption. Multinuclear NMR experiments performed on the electrolyte anions and cations reveal two main environments inside the carbon. In-pore ions (observed at low frequencies) are adsorbed inside the pores, whilst ex-pore ions (observed at higher frequencies) are not adsorbed and are in large reservoirs of electrolyte between carbon particles. All our experiments were carried out in the absence of an applied electrical potential in order to assess the mechanisms related to ion adsorption without the contribution of electrosorption. Our results indicate similar adsorption behaviour for anions and cations. Furthermore, we probe the effect of sample orientation, which is shown to have a marked effect on the NMR spectra. Finally, we show that a 13 C -> 1 H cross polarisation experiment enables magnetisation transfer from the carbon architecture to the adsorbed species, allowing selective observation of the adsorbed ions and confirming our spectral assignments.

Download full text files

Export metadata

Additional Services

Share in Twitter Search Google Scholar


Document Type:Article
Author:Alexander C. ForseORCiD, John M. Griffin, Hao Wang, Nicole M. Trease, Volker PresserORCiD, Yury GogotsiORCiD, Patrice SimonORCiD, Clare P. GreyORCiD
Parent Title (English):Physical Chemistry Chemical Physics
First Page:7722
Last Page:7730
Year of first Publication:2013
Release Date:2022/11/18
Impact:04.198 (2013)
Open Access:Open Access
Signature:INM 2013/36
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International