Aspects of the Influence of Light on the Adsorption and Electrooxidation of Allyl Alcohol on Pt/Pt Electrodes in Perchloric Acid Solutions
The electrooxidation of the adsorbed species produced by allyl alcohol adsorption on platinized platinum electrode has been studied in 1.0 M HClO4 medium. The maximum amount of adsorbed intermediates formed during allyl alcohol adsorption on the electrode surface, was observed at the adsorption pote...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
1998-01-01
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| Series: | Journal of the Brazilian Chemical Society |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531998000500012 |
| _version_ | 1811268514368978944 |
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| author | Barin Claudia Smaniotto Gonçalves Reinaldo Simões |
| author_facet | Barin Claudia Smaniotto Gonçalves Reinaldo Simões |
| author_sort | Barin Claudia Smaniotto |
| collection | DOAJ |
| description | The electrooxidation of the adsorbed species produced by allyl alcohol adsorption on platinized platinum electrode has been studied in 1.0 M HClO4 medium. The maximum amount of adsorbed intermediates formed during allyl alcohol adsorption on the electrode surface, was observed at the adsorption potential, Eads = 0.00 V (SCE). Chronoamperometric studies at this potential confirm that the current associated with the hydrogen adsorption process decreases in the presence of the organic compound. Allyl alcohol displaces adsorbed hydrogen at the active sites. The incidence of polychromatic light on the electrode improves this effect as shown by comparison with the same experiments in the darkness. However, the electrooxidation of the adsorbed species comprise a monoelectronic charge transfer step. The anodic current associated with this process was higher under illumination than in the dark. This difference was attributed to a light-induced effect: either on the adsorption process of allyl alcohol on Pt/Pt, or on the electrooxidation of the adsorbed species. The electrooxidation of the adsorbed species formed during allyl alcohol adsorption demands apparent activation energies equivalent to 33.3 kJ mol-1 and 24.9 kJ mol-1 in the dark and under illumination, respectively. |
| first_indexed | 2024-04-12T21:24:17Z |
| format | Article |
| id | doaj.art-1045407f2e0f41b9b37dd9f808ea926f |
| institution | Directory Open Access Journal |
| issn | 0103-5053 |
| language | English |
| last_indexed | 2024-04-12T21:24:17Z |
| publishDate | 1998-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Journal of the Brazilian Chemical Society |
| spelling | doaj.art-1045407f2e0f41b9b37dd9f808ea926f2022-12-22T03:16:13ZengSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society0103-50531998-01-0195473481Aspects of the Influence of Light on the Adsorption and Electrooxidation of Allyl Alcohol on Pt/Pt Electrodes in Perchloric Acid SolutionsBarin Claudia SmaniottoGonçalves Reinaldo SimõesThe electrooxidation of the adsorbed species produced by allyl alcohol adsorption on platinized platinum electrode has been studied in 1.0 M HClO4 medium. The maximum amount of adsorbed intermediates formed during allyl alcohol adsorption on the electrode surface, was observed at the adsorption potential, Eads = 0.00 V (SCE). Chronoamperometric studies at this potential confirm that the current associated with the hydrogen adsorption process decreases in the presence of the organic compound. Allyl alcohol displaces adsorbed hydrogen at the active sites. The incidence of polychromatic light on the electrode improves this effect as shown by comparison with the same experiments in the darkness. However, the electrooxidation of the adsorbed species comprise a monoelectronic charge transfer step. The anodic current associated with this process was higher under illumination than in the dark. This difference was attributed to a light-induced effect: either on the adsorption process of allyl alcohol on Pt/Pt, or on the electrooxidation of the adsorbed species. The electrooxidation of the adsorbed species formed during allyl alcohol adsorption demands apparent activation energies equivalent to 33.3 kJ mol-1 and 24.9 kJ mol-1 in the dark and under illumination, respectively.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531998000500012allyl alcoholphoto-effectselectrooxidationadsorptionplatinum platinized electrode |
| spellingShingle | Barin Claudia Smaniotto Gonçalves Reinaldo Simões Aspects of the Influence of Light on the Adsorption and Electrooxidation of Allyl Alcohol on Pt/Pt Electrodes in Perchloric Acid Solutions Journal of the Brazilian Chemical Society allyl alcohol photo-effects electrooxidation adsorption platinum platinized electrode |
| title | Aspects of the Influence of Light on the Adsorption and Electrooxidation of Allyl Alcohol on Pt/Pt Electrodes in Perchloric Acid Solutions |
| title_full | Aspects of the Influence of Light on the Adsorption and Electrooxidation of Allyl Alcohol on Pt/Pt Electrodes in Perchloric Acid Solutions |
| title_fullStr | Aspects of the Influence of Light on the Adsorption and Electrooxidation of Allyl Alcohol on Pt/Pt Electrodes in Perchloric Acid Solutions |
| title_full_unstemmed | Aspects of the Influence of Light on the Adsorption and Electrooxidation of Allyl Alcohol on Pt/Pt Electrodes in Perchloric Acid Solutions |
| title_short | Aspects of the Influence of Light on the Adsorption and Electrooxidation of Allyl Alcohol on Pt/Pt Electrodes in Perchloric Acid Solutions |
| title_sort | aspects of the influence of light on the adsorption and electrooxidation of allyl alcohol on pt pt electrodes in perchloric acid solutions |
| topic | allyl alcohol photo-effects electrooxidation adsorption platinum platinized electrode |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531998000500012 |
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