Platinized titanium dioxide electrodes for methanol oxidation and photo-oxidation
Platinized deposits have been formed on TiO2 particulate films supported on Ti substrates, by means of galvanic replacement of pre-deposited metallic Cu and subsequent immersion of the Cu/TiO2 coatings into a chloroplatinic acid solution. The spontaneous replacement of Cu by Pt results in Pt(Cu)/TiO...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
International Association of Physical Chemists (IAPC)
2012-11-01
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| Series: | Journal of Electrochemical Science and Engineering |
| Subjects: | |
| Online Access: | http://www.jese-online.org/Articles/Vol_02/No_4/pdf/jESE_Vol2_No4_p155-169_2012.pdf |
| _version_ | 1818501243216068608 |
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| author | IOANNIS POULIOS GEORGIOS KOKKINIDIS EUGENIA VALOVA STEPHAN ARMYANOV JENIA GEORGIEVA IOANNA MINTSOULI SVETLOZAR IVANOV SOTIRIS SOTIROPOULOS |
| author_facet | IOANNIS POULIOS GEORGIOS KOKKINIDIS EUGENIA VALOVA STEPHAN ARMYANOV JENIA GEORGIEVA IOANNA MINTSOULI SVETLOZAR IVANOV SOTIRIS SOTIROPOULOS |
| author_sort | IOANNIS POULIOS |
| collection | DOAJ |
| description | Platinized deposits have been formed on TiO2 particulate films supported on Ti substrates, by means of galvanic replacement of pre-deposited metallic Cu and subsequent immersion of the Cu/TiO2 coatings into a chloroplatinic acid solution. The spontaneous replacement of Cu by Pt results in Pt(Cu)/TiO2/Ti electrodes. Both the platinized and the precursor TiO2/Ti electrodes have been characterized by SEM microscopy/EDS spectroscopy, their surface electrochemistry has been assessed by cyclic voltammetry in the dark and their photoelectrochemical properties by photovoltammetry under UV illumination. It has been found that, although platinized rutile-rich electrodes exhibit typical Pt surface electrochemistry, the anatase-rich electrodes show only traces of oxide formation and stripping. The latter has been translated to a suppression of methanol oxidation at anatase-rich electrodes. On the contrary, methanol oxidation at platinized rutile-rich electrodes occurs at significant rates and can be further enhanced upon UV illumination, as a result of Pt and TiO2 synergism in the photoelectrochemical oxidation of methanol. |
| first_indexed | 2024-12-10T20:53:31Z |
| format | Article |
| id | doaj.art-facfc08a9753492dab5a6beada602d3d |
| institution | Directory Open Access Journal |
| issn | 1847-9286 |
| language | English |
| last_indexed | 2024-12-10T20:53:31Z |
| publishDate | 2012-11-01 |
| publisher | International Association of Physical Chemists (IAPC) |
| record_format | Article |
| series | Journal of Electrochemical Science and Engineering |
| spelling | doaj.art-facfc08a9753492dab5a6beada602d3d2022-12-22T01:34:02ZengInternational Association of Physical Chemists (IAPC)Journal of Electrochemical Science and Engineering1847-92862012-11-0124155169Platinized titanium dioxide electrodes for methanol oxidation and photo-oxidationIOANNIS POULIOSGEORGIOS KOKKINIDISEUGENIA VALOVASTEPHAN ARMYANOVJENIA GEORGIEVAIOANNA MINTSOULISVETLOZAR IVANOVSOTIRIS SOTIROPOULOSPlatinized deposits have been formed on TiO2 particulate films supported on Ti substrates, by means of galvanic replacement of pre-deposited metallic Cu and subsequent immersion of the Cu/TiO2 coatings into a chloroplatinic acid solution. The spontaneous replacement of Cu by Pt results in Pt(Cu)/TiO2/Ti electrodes. Both the platinized and the precursor TiO2/Ti electrodes have been characterized by SEM microscopy/EDS spectroscopy, their surface electrochemistry has been assessed by cyclic voltammetry in the dark and their photoelectrochemical properties by photovoltammetry under UV illumination. It has been found that, although platinized rutile-rich electrodes exhibit typical Pt surface electrochemistry, the anatase-rich electrodes show only traces of oxide formation and stripping. The latter has been translated to a suppression of methanol oxidation at anatase-rich electrodes. On the contrary, methanol oxidation at platinized rutile-rich electrodes occurs at significant rates and can be further enhanced upon UV illumination, as a result of Pt and TiO2 synergism in the photoelectrochemical oxidation of methanol.http://www.jese-online.org/Articles/Vol_02/No_4/pdf/jESE_Vol2_No4_p155-169_2012.pdfTitanium dioxideplatinumgalvanic replacementelectrocatalysisphotoelectrocatalysis |
| spellingShingle | IOANNIS POULIOS GEORGIOS KOKKINIDIS EUGENIA VALOVA STEPHAN ARMYANOV JENIA GEORGIEVA IOANNA MINTSOULI SVETLOZAR IVANOV SOTIRIS SOTIROPOULOS Platinized titanium dioxide electrodes for methanol oxidation and photo-oxidation Journal of Electrochemical Science and Engineering Titanium dioxide platinum galvanic replacement electrocatalysis photoelectrocatalysis |
| title | Platinized titanium dioxide electrodes for methanol oxidation and photo-oxidation |
| title_full | Platinized titanium dioxide electrodes for methanol oxidation and photo-oxidation |
| title_fullStr | Platinized titanium dioxide electrodes for methanol oxidation and photo-oxidation |
| title_full_unstemmed | Platinized titanium dioxide electrodes for methanol oxidation and photo-oxidation |
| title_short | Platinized titanium dioxide electrodes for methanol oxidation and photo-oxidation |
| title_sort | platinized titanium dioxide electrodes for methanol oxidation and photo oxidation |
| topic | Titanium dioxide platinum galvanic replacement electrocatalysis photoelectrocatalysis |
| url | http://www.jese-online.org/Articles/Vol_02/No_4/pdf/jESE_Vol2_No4_p155-169_2012.pdf |
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