Bibliographic Details
| Title: |
The effect of halide ion impurities and Nafion on electrooxidation of CO on platinum |
| Authors: |
Strmcnik, D., Gaberscek, M.1, Hocevar, S.1, Jamnik, J.1 |
| Source: |
Solid State Ionics. Jun2005, Vol. 176 Issue 19-22, p1759-1763. 5p. |
| Subjects: |
Oxidation, Direct energy conversion, Electric batteries, Electrons |
| Abstract: |
Abstract: The effect of selected impurities that can be brought into the system from the synthesis of the catalyst or from the Nafion membrane on the CO electrooxidation is investigated. In the presence of halide ions, the CO oxidation peak is shifted to more positive values. The extent of displacement is the largest in the case of iodine, followed by bromide, chloride and fluoride. The same order is known for adsorption affinity of halide ions on platinum. Higher halide ion concentrations also result in larger CO peak displacement. All findings are consistent with the assumption that halide ions are adsorbed on sites that are usually occupied by water—the crucial species needed for CO oxidation. Nafion itself seems to have no effect on CO oxidation. The usually observed shifts of CO peak in Nafion-treated surfaces are ascribed to the presence of organic impurities in Nafion. [Copyright &y& Elsevier] |
|
Copyright of Solid State Ionics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Engineering Source |
