Microwave activation of processes in mesopores: The thiourea electrooxidation at mesoporous platinum
In situ microwave activation is applied to the electrochemical oxidation of thiourea at low surface area (polished polycrystalline) and at high surface area (electrodeposited mesoporous platinum coated) platinum microelectrodes. The one electron oxidation of thiourea to formamidine disulfide is moni...
| Asıl Yazarlar: | , , , |
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| Materyal Türü: | Journal article |
| Dil: | English |
| Baskı/Yayın Bilgisi: |
2006
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| _version_ | 1826272954602749952 |
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| author | Ghanem, M Coles, B Compton, R Marken, F |
| author_facet | Ghanem, M Coles, B Compton, R Marken, F |
| author_sort | Ghanem, M |
| collection | OXFORD |
| description | In situ microwave activation is applied to the electrochemical oxidation of thiourea at low surface area (polished polycrystalline) and at high surface area (electrodeposited mesoporous platinum coated) platinum microelectrodes. The one electron oxidation of thiourea to formamidine disulfide is monitored as a function of the different activation parameters. In the absence of microwaves (ambient temperature, low mass transport) increasing the surface area (roughness) increases the thiourea oxidation response predominantly due to adsorption effects. In the presence of high microwave intensities, high mass transport and thermal effects further increase the oxidation current at mesoporous platinum. The most effective thickness of the mesoporous platinum film for the thiourea oxidation process is estimated as 3 μm independent of electrode diameter, temperature, or mass transport effects. © 2006 Wiley-VCH Verlag GmbH and Co. KGaA. |
| first_indexed | 2024-03-06T22:20:43Z |
| format | Journal article |
| id | oxford-uuid:54f477d5-e23a-41fa-8013-813b09f6c481 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:20:43Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:54f477d5-e23a-41fa-8013-813b09f6c4812022-03-26T16:40:58ZMicrowave activation of processes in mesopores: The thiourea electrooxidation at mesoporous platinumJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:54f477d5-e23a-41fa-8013-813b09f6c481EnglishSymplectic Elements at Oxford2006Ghanem, MColes, BCompton, RMarken, FIn situ microwave activation is applied to the electrochemical oxidation of thiourea at low surface area (polished polycrystalline) and at high surface area (electrodeposited mesoporous platinum coated) platinum microelectrodes. The one electron oxidation of thiourea to formamidine disulfide is monitored as a function of the different activation parameters. In the absence of microwaves (ambient temperature, low mass transport) increasing the surface area (roughness) increases the thiourea oxidation response predominantly due to adsorption effects. In the presence of high microwave intensities, high mass transport and thermal effects further increase the oxidation current at mesoporous platinum. The most effective thickness of the mesoporous platinum film for the thiourea oxidation process is estimated as 3 μm independent of electrode diameter, temperature, or mass transport effects. © 2006 Wiley-VCH Verlag GmbH and Co. KGaA. |
| spellingShingle | Ghanem, M Coles, B Compton, R Marken, F Microwave activation of processes in mesopores: The thiourea electrooxidation at mesoporous platinum |
| title | Microwave activation of processes in mesopores: The thiourea electrooxidation at mesoporous platinum |
| title_full | Microwave activation of processes in mesopores: The thiourea electrooxidation at mesoporous platinum |
| title_fullStr | Microwave activation of processes in mesopores: The thiourea electrooxidation at mesoporous platinum |
| title_full_unstemmed | Microwave activation of processes in mesopores: The thiourea electrooxidation at mesoporous platinum |
| title_short | Microwave activation of processes in mesopores: The thiourea electrooxidation at mesoporous platinum |
| title_sort | microwave activation of processes in mesopores the thiourea electrooxidation at mesoporous platinum |
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