Influence of Adsorption Kinetics upon the Electrochemically Reversible Hydrogen Oxidation Reaction
The hydrogen oxidation reaction was studied at bright polycrystalline platinum microelectrodes. A smaller steady-state current was observed in experiment as compared to that anticipated for a diffusion limited process. To facilitate physical insight into this system, a simulation model based on the...
| Auteurs principaux: | , , , , |
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| Format: | Journal article |
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American Chemical Society
2015
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| _version_ | 1826299505873518592 |
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| author | Lin, C Jiao, X Tschulik, K Batchelor-Mcauley, C Compton, R |
| author_facet | Lin, C Jiao, X Tschulik, K Batchelor-Mcauley, C Compton, R |
| author_sort | Lin, C |
| collection | OXFORD |
| description | The hydrogen oxidation reaction was studied at bright polycrystalline platinum microelectrodes. A smaller steady-state current was observed in experiment as compared to that anticipated for a diffusion limited process. To facilitate physical insight into this system, a simulation model based on the Tafel-Volmer mechanism for the hydrogen oxidation reaction was developed. Under conditions of reversible electron transfer, the adsorption kinetics k<inf>a</inf> and k<inf>d</inf> are found to have distinctly different influences upon the voltammetry responses. Correspondence between the simulated and the experimental voltammograms is found, confirming the decrease of the steady-state current is caused by the slow adsorption process. The combined adsorption parameter k<inf>a</inf>γmax<sup>2</sup> on the Tafel-Volmer mechanism was approximately 5.0 × 10<sup>-4</sup> m s<sup>-1</sup>, where γ <inf>max</inf> (mol m<sup>-2</sup>) is the maximum surface coverage of adsorption hydrogen atoms. |
| first_indexed | 2024-03-07T05:02:57Z |
| format | Journal article |
| id | oxford-uuid:d8f23eb1-d9b0-4e91-ab6c-cddec0d01c81 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T05:02:57Z |
| publishDate | 2015 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:d8f23eb1-d9b0-4e91-ab6c-cddec0d01c812022-03-27T08:52:23ZInfluence of Adsorption Kinetics upon the Electrochemically Reversible Hydrogen Oxidation ReactionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d8f23eb1-d9b0-4e91-ab6c-cddec0d01c81Symplectic Elements at OxfordAmerican Chemical Society2015Lin, CJiao, XTschulik, KBatchelor-Mcauley, CCompton, RThe hydrogen oxidation reaction was studied at bright polycrystalline platinum microelectrodes. A smaller steady-state current was observed in experiment as compared to that anticipated for a diffusion limited process. To facilitate physical insight into this system, a simulation model based on the Tafel-Volmer mechanism for the hydrogen oxidation reaction was developed. Under conditions of reversible electron transfer, the adsorption kinetics k<inf>a</inf> and k<inf>d</inf> are found to have distinctly different influences upon the voltammetry responses. Correspondence between the simulated and the experimental voltammograms is found, confirming the decrease of the steady-state current is caused by the slow adsorption process. The combined adsorption parameter k<inf>a</inf>γmax<sup>2</sup> on the Tafel-Volmer mechanism was approximately 5.0 × 10<sup>-4</sup> m s<sup>-1</sup>, where γ <inf>max</inf> (mol m<sup>-2</sup>) is the maximum surface coverage of adsorption hydrogen atoms. |
| spellingShingle | Lin, C Jiao, X Tschulik, K Batchelor-Mcauley, C Compton, R Influence of Adsorption Kinetics upon the Electrochemically Reversible Hydrogen Oxidation Reaction |
| title | Influence of Adsorption Kinetics upon the Electrochemically Reversible Hydrogen Oxidation Reaction |
| title_full | Influence of Adsorption Kinetics upon the Electrochemically Reversible Hydrogen Oxidation Reaction |
| title_fullStr | Influence of Adsorption Kinetics upon the Electrochemically Reversible Hydrogen Oxidation Reaction |
| title_full_unstemmed | Influence of Adsorption Kinetics upon the Electrochemically Reversible Hydrogen Oxidation Reaction |
| title_short | Influence of Adsorption Kinetics upon the Electrochemically Reversible Hydrogen Oxidation Reaction |
| title_sort | influence of adsorption kinetics upon the electrochemically reversible hydrogen oxidation reaction |
| work_keys_str_mv | AT linc influenceofadsorptionkineticsupontheelectrochemicallyreversiblehydrogenoxidationreaction AT jiaox influenceofadsorptionkineticsupontheelectrochemicallyreversiblehydrogenoxidationreaction AT tschulikk influenceofadsorptionkineticsupontheelectrochemicallyreversiblehydrogenoxidationreaction AT batchelormcauleyc influenceofadsorptionkineticsupontheelectrochemicallyreversiblehydrogenoxidationreaction AT comptonr influenceofadsorptionkineticsupontheelectrochemicallyreversiblehydrogenoxidationreaction |