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Electrochemistry at Negative Potentials in Bis(trifluoromethanesulfonyl)amide Ionic Liquids
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September 25, 2009
The bis(trifluoromethanesulfonyl)amide (TFSA) anion is widely studied as an ionic liquid (IL) forming anion which imparts many useful properties, notably electrochemical stability. Here we present electrochemical and spectroscopic evidence indicating that reductive decomposition of the bis(trifluoromethanesulfonyl)amide (TFSA) anion begins at ~ −2.0 V vs. Fc+/Fc, well before the reported cathodic limit for many of these ILs. These processes are shown to be dependent upon the electrode substrate and are influenced by the water content of the IL. Supporting ab initio calculations are presented which suggest a possible mechanism for the anion decomposition. The products appear to passivate the electrode surface and the implications of this behaviour are discussed.
Received: 2006-6-19
Accepted: 2006-8-17
Published Online: 2009-9-25
Published in Print: 2006-10-1
© Oldenbourg Wissenschaftsverlag
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Articles in the same Issue
- Preface: 92nd Bunsenkolloquium – Physical Chemistry in Ionic Liquids
- Relaxation Dynamics upon Ultrashort UV Photo-Excitation of an Iodide Doped Ionic Liquid and of a Pure Lithium Iodide Melt
- Electrochemistry in Room Temperature Ionic Liquids: A Review and Some Possible Applications
- Electrochemical Deposition of Nanostructured Metals and Alloys from Ionic Liquids
- Coating of Mild Steel by Aluminium in the Ionic Liquid [EMIm]Tf2N and its Corrosion Performance
- Microviscosity and Micropolarity Effects of Imidazolium Based Ionic Liquids Investigated by Spin Probes Their Diffusion and Spin Exchange
- Semi-Empirical Methods to Predict the Physical Properties of Ionic Liquids: An Overview of Recent Developments
- Water Vibrational Bands as a Polarity Indicator in Ionic Liquids
- Probing Lithium and Alumina Impurities in Air- and Water Stable Ionic Liquids by Cyclic Voltammetry and In Situ Scanning Tunneling Microscopy
- The Static Dielectric Constant of Ionic Liquids
- A Comparative Study on the Electronic Structure of the 1-Ethyl-3-Methylimidazolium Bis(trifluoromethylsulfonyl)amide RT-Ionic Liquid by Electron Spectroscopy and First Principles Calculations
- Phase Separation in Solutions of Room Temperature Ionic Liquids in Hydrocarbons
- Surface Studies on the Ionic Liquid 1-Ethyl-3-Methylimidazolium Ethylsulfate Using X-Ray Photoelectron Spectroscopy (XPS)
- Templating and Phase Behaviour of the Long Chain Ionic Liquid C16mimCl
- Preparation of CdSe Quantum Dots in Ionic Liquids
- Electrochemistry at Negative Potentials in Bis(trifluoromethanesulfonyl)amide Ionic Liquids
- Enthalpies of Solution of Organic Solutes in the Ionic Liquids [Me3BuN][NTf2] and [EMIM][EtSO4]
- Electrodeposition of Metals for Micro- and Nanostructuring at Interfaces between Solid, Liquid and Gaseous Conductors: Dendrites, Whiskers and Nanoparticles
