An ultra-high vacuum electrochemical/mass spectrometry study of anodic decomposition of a protic ionic liquid
Protic ionic liquids (PILs) are ionic liquids that are formed by proton transfer from Brønsted acids to Brønsted bases, and which are being proposed for use in a wide range of electrochemical devices. In this contribution, we describe electrolysis of the PIL diethylmethylammonium trifluoromethanesul...
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Elsevier
2018
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| Online Access: | https://eprints.nottingham.ac.uk/50694/ |
| _version_ | 1848798316531286016 |
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| author | Goodwin, Sean Gibson, Joshua Jones, Robert Walsh, Darren A. |
| author_facet | Goodwin, Sean Gibson, Joshua Jones, Robert Walsh, Darren A. |
| author_sort | Goodwin, Sean |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Protic ionic liquids (PILs) are ionic liquids that are formed by proton transfer from Brønsted acids to Brønsted bases, and which are being proposed for use in a wide range of electrochemical devices. In this contribution, we describe electrolysis of the PIL diethylmethylammonium trifluoromethanesulfonate at Pd, Pt, and Au electrodes in an ultra- high vacuum chamber connected to a mass spectrometer. At potentials negative of about −0.8 V vs. Pd/H, reduction of the PIL cations occurs, liberating H2. Positive of about 2.2 V vs. Pd/H, electrooxidation of the PIL anions occurs, resulting in the detection of a number of fragments of the trifluoromethanesulfonate ions using the mass spectrometer. Notably, electrooxidation of the PIL anions occurs at the same potential, regardless of whether Pt, Au, or Pd is used as the electrode. In contrast, electrooxidation of water in the PIL occurs at different potentials in the PIL as the electrode composition changes. These results show that the electrochemical window of the PIL is independent of the electrode composition, but if water is present in the liquid, this independence is masked by the electrolysis of water. |
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| format | Article |
| id | nottingham-50694 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:17:50Z |
| publishDate | 2018 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-506942020-05-04T19:51:14Z https://eprints.nottingham.ac.uk/50694/ An ultra-high vacuum electrochemical/mass spectrometry study of anodic decomposition of a protic ionic liquid Goodwin, Sean Gibson, Joshua Jones, Robert Walsh, Darren A. Protic ionic liquids (PILs) are ionic liquids that are formed by proton transfer from Brønsted acids to Brønsted bases, and which are being proposed for use in a wide range of electrochemical devices. In this contribution, we describe electrolysis of the PIL diethylmethylammonium trifluoromethanesulfonate at Pd, Pt, and Au electrodes in an ultra- high vacuum chamber connected to a mass spectrometer. At potentials negative of about −0.8 V vs. Pd/H, reduction of the PIL cations occurs, liberating H2. Positive of about 2.2 V vs. Pd/H, electrooxidation of the PIL anions occurs, resulting in the detection of a number of fragments of the trifluoromethanesulfonate ions using the mass spectrometer. Notably, electrooxidation of the PIL anions occurs at the same potential, regardless of whether Pt, Au, or Pd is used as the electrode. In contrast, electrooxidation of water in the PIL occurs at different potentials in the PIL as the electrode composition changes. These results show that the electrochemical window of the PIL is independent of the electrode composition, but if water is present in the liquid, this independence is masked by the electrolysis of water. Elsevier 2018-05 Article PeerReviewed Goodwin, Sean, Gibson, Joshua, Jones, Robert and Walsh, Darren A. (2018) An ultra-high vacuum electrochemical/mass spectrometry study of anodic decomposition of a protic ionic liquid. Electrochemistry Communications, 90 . pp. 111-115. ISSN 1388-2481 ionic liquids; electrochemical window; mass spectrometry; ultra-high vacuum https://www.sciencedirect.com/science/article/pii/S1388248118300833?via%3Dihub doi:10.1016/j.elecom.2018.04.013 doi:10.1016/j.elecom.2018.04.013 |
| spellingShingle | ionic liquids; electrochemical window; mass spectrometry; ultra-high vacuum Goodwin, Sean Gibson, Joshua Jones, Robert Walsh, Darren A. An ultra-high vacuum electrochemical/mass spectrometry study of anodic decomposition of a protic ionic liquid |
| title | An ultra-high vacuum electrochemical/mass spectrometry study of anodic decomposition of a protic ionic liquid |
| title_full | An ultra-high vacuum electrochemical/mass spectrometry study of anodic decomposition of a protic ionic liquid |
| title_fullStr | An ultra-high vacuum electrochemical/mass spectrometry study of anodic decomposition of a protic ionic liquid |
| title_full_unstemmed | An ultra-high vacuum electrochemical/mass spectrometry study of anodic decomposition of a protic ionic liquid |
| title_short | An ultra-high vacuum electrochemical/mass spectrometry study of anodic decomposition of a protic ionic liquid |
| title_sort | ultra-high vacuum electrochemical/mass spectrometry study of anodic decomposition of a protic ionic liquid |
| topic | ionic liquids; electrochemical window; mass spectrometry; ultra-high vacuum |
| url | https://eprints.nottingham.ac.uk/50694/ https://eprints.nottingham.ac.uk/50694/ https://eprints.nottingham.ac.uk/50694/ |