Electrode Kinetic Studies of the Hydroquinone-Benzoquinone System and the Reaction between Hydroquinone and Ammonia in Propylene Carbonate: Application to the Indirect Electroanalytical Sensing of Ammonia
The oxidation of hydroquinone and reduction of benzoquinone have been studied by cyclic voltammetry at glassy carbon electrodes in propylene carbonate. Diffusion coefficients of the different species obtained from chronoamperometric measurements with use of microdisk electrodes were 2.7 ( 0.3 X 10-6...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
American Chemical Society
2007
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| Online Access: | http://hdl.handle.net/20.500.11937/10035 |
| _version_ | 1848746118955925504 |
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| author | Ji, X. Banks, C. Silvester, Debbie Wain, A. Compton, R. |
| author_facet | Ji, X. Banks, C. Silvester, Debbie Wain, A. Compton, R. |
| author_sort | Ji, X. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The oxidation of hydroquinone and reduction of benzoquinone have been studied by cyclic voltammetry at glassy carbon electrodes in propylene carbonate. Diffusion coefficients of the different species obtained from chronoamperometric measurements with use of microdisk electrodes were 2.7 ( 0.3 X 10-6 cm2 s-1 for hydroquinone and 4.2 ( 0.2 X 10-6 cm2 s-1 for benzoquinone. Simulation was used to model the cyclic voltammetric responses of macroelectrodes to give electrode kinetic information for the electrochemical oxidation of hydroquinone and reduction of benzoquinone. Next, the reaction between ammonia and hydroquinone was investigated. It is shown that ammonia reversibly removes one proton from the hydroquinone molecules, resulting in a new wave observed at ca. + 0.15 V (vs Ag wire). Finally by measuring the peak current of the new wave as a function of ammonia concentration its analytical utility for ammonia sensing was examined in the range from 10 and 100 ppm. |
| first_indexed | 2025-11-14T06:28:11Z |
| format | Journal Article |
| id | curtin-20.500.11937-10035 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:28:11Z |
| publishDate | 2007 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-100352017-09-13T14:50:15Z Electrode Kinetic Studies of the Hydroquinone-Benzoquinone System and the Reaction between Hydroquinone and Ammonia in Propylene Carbonate: Application to the Indirect Electroanalytical Sensing of Ammonia Ji, X. Banks, C. Silvester, Debbie Wain, A. Compton, R. The oxidation of hydroquinone and reduction of benzoquinone have been studied by cyclic voltammetry at glassy carbon electrodes in propylene carbonate. Diffusion coefficients of the different species obtained from chronoamperometric measurements with use of microdisk electrodes were 2.7 ( 0.3 X 10-6 cm2 s-1 for hydroquinone and 4.2 ( 0.2 X 10-6 cm2 s-1 for benzoquinone. Simulation was used to model the cyclic voltammetric responses of macroelectrodes to give electrode kinetic information for the electrochemical oxidation of hydroquinone and reduction of benzoquinone. Next, the reaction between ammonia and hydroquinone was investigated. It is shown that ammonia reversibly removes one proton from the hydroquinone molecules, resulting in a new wave observed at ca. + 0.15 V (vs Ag wire). Finally by measuring the peak current of the new wave as a function of ammonia concentration its analytical utility for ammonia sensing was examined in the range from 10 and 100 ppm. 2007 Journal Article http://hdl.handle.net/20.500.11937/10035 10.1021/jp066704y American Chemical Society restricted |
| spellingShingle | Ji, X. Banks, C. Silvester, Debbie Wain, A. Compton, R. Electrode Kinetic Studies of the Hydroquinone-Benzoquinone System and the Reaction between Hydroquinone and Ammonia in Propylene Carbonate: Application to the Indirect Electroanalytical Sensing of Ammonia |
| title | Electrode Kinetic Studies of the Hydroquinone-Benzoquinone System and the Reaction between Hydroquinone and Ammonia in Propylene Carbonate: Application to the Indirect Electroanalytical Sensing of Ammonia |
| title_full | Electrode Kinetic Studies of the Hydroquinone-Benzoquinone System and the Reaction between Hydroquinone and Ammonia in Propylene Carbonate: Application to the Indirect Electroanalytical Sensing of Ammonia |
| title_fullStr | Electrode Kinetic Studies of the Hydroquinone-Benzoquinone System and the Reaction between Hydroquinone and Ammonia in Propylene Carbonate: Application to the Indirect Electroanalytical Sensing of Ammonia |
| title_full_unstemmed | Electrode Kinetic Studies of the Hydroquinone-Benzoquinone System and the Reaction between Hydroquinone and Ammonia in Propylene Carbonate: Application to the Indirect Electroanalytical Sensing of Ammonia |
| title_short | Electrode Kinetic Studies of the Hydroquinone-Benzoquinone System and the Reaction between Hydroquinone and Ammonia in Propylene Carbonate: Application to the Indirect Electroanalytical Sensing of Ammonia |
| title_sort | electrode kinetic studies of the hydroquinone-benzoquinone system and the reaction between hydroquinone and ammonia in propylene carbonate: application to the indirect electroanalytical sensing of ammonia |
| url | http://hdl.handle.net/20.500.11937/10035 |