Mechanistic studies of the electro-oxidation pathway of ammonia in several room-temperature ionic liquids
A mechanistic study of the direct oxidation of ammonia has been reported in several room-temperature ionic liquids (RTILs), namely, [C4mim] [BF4], [C4mim][OTf], [C2IrUm][NTf2], [C4mim][NTf2], and [C4mim][PF6], on a 10 μm. diameter Pt microdisk electrode. In four of the RTILs studied, the cyclic volt...
| Главные авторы: | , , , , |
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| Формат: | Journal article |
| Язык: | English |
| Опубликовано: |
2007
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| _version_ | 1826262132866416640 |
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| author | Ji, X Silvester, D Aldous, L Hardacre, C Compton, R |
| author_facet | Ji, X Silvester, D Aldous, L Hardacre, C Compton, R |
| author_sort | Ji, X |
| collection | OXFORD |
| description | A mechanistic study of the direct oxidation of ammonia has been reported in several room-temperature ionic liquids (RTILs), namely, [C4mim] [BF4], [C4mim][OTf], [C2IrUm][NTf2], [C4mim][NTf2], and [C4mim][PF6], on a 10 μm. diameter Pt microdisk electrode. In four of the RTILs studied, the cyclic voltammetric analysis suggests that ammonia is initially oxidized to nitrogen, N2, and protons, which are transferred to an ammonia molecule, forming NH4+ via the protonation of the anion(s) (A-). In contrast, NH4+ is formed first in [C4-mim] [PF6], followed by the protonated anion(s), HA. In all five RTILs, both HA and NH4+ are reduced at the electrode surface, forming hydrogen gas, which is then oxidized. The effect of changing the RTIL anion is discussed, and this may have implications in the defining of pka in RTIL media. This work also has implications in the possible amperometric sensing of ammonia gas. © 2007 American Chemical Society. |
| first_indexed | 2024-03-06T19:31:34Z |
| format | Journal article |
| id | oxford-uuid:1da0d133-815f-400f-8175-071725372c9b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:31:34Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:1da0d133-815f-400f-8175-071725372c9b2022-03-26T11:12:02ZMechanistic studies of the electro-oxidation pathway of ammonia in several room-temperature ionic liquidsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:1da0d133-815f-400f-8175-071725372c9bEnglishSymplectic Elements at Oxford2007Ji, XSilvester, DAldous, LHardacre, CCompton, RA mechanistic study of the direct oxidation of ammonia has been reported in several room-temperature ionic liquids (RTILs), namely, [C4mim] [BF4], [C4mim][OTf], [C2IrUm][NTf2], [C4mim][NTf2], and [C4mim][PF6], on a 10 μm. diameter Pt microdisk electrode. In four of the RTILs studied, the cyclic voltammetric analysis suggests that ammonia is initially oxidized to nitrogen, N2, and protons, which are transferred to an ammonia molecule, forming NH4+ via the protonation of the anion(s) (A-). In contrast, NH4+ is formed first in [C4-mim] [PF6], followed by the protonated anion(s), HA. In all five RTILs, both HA and NH4+ are reduced at the electrode surface, forming hydrogen gas, which is then oxidized. The effect of changing the RTIL anion is discussed, and this may have implications in the defining of pka in RTIL media. This work also has implications in the possible amperometric sensing of ammonia gas. © 2007 American Chemical Society. |
| spellingShingle | Ji, X Silvester, D Aldous, L Hardacre, C Compton, R Mechanistic studies of the electro-oxidation pathway of ammonia in several room-temperature ionic liquids |
| title | Mechanistic studies of the electro-oxidation pathway of ammonia in several room-temperature ionic liquids |
| title_full | Mechanistic studies of the electro-oxidation pathway of ammonia in several room-temperature ionic liquids |
| title_fullStr | Mechanistic studies of the electro-oxidation pathway of ammonia in several room-temperature ionic liquids |
| title_full_unstemmed | Mechanistic studies of the electro-oxidation pathway of ammonia in several room-temperature ionic liquids |
| title_short | Mechanistic studies of the electro-oxidation pathway of ammonia in several room-temperature ionic liquids |
| title_sort | mechanistic studies of the electro oxidation pathway of ammonia in several room temperature ionic liquids |
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