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| Content Provider | Springer Nature Link |
|---|---|
| Author | Croze, Virginie Ettingshausen, Frank Melke, Julia Soehn, Matthias Stuermer, Dominic Roth, Christina |
| Copyright Year | 2009 |
| Abstract | For a detailed understanding and systematic optimization of fuel cell systems, in situ studies are an indispensable tool, as they provide information on the catalyst structure in different operation conditions. X-ray absorption spectroscopy (XAS) is in particular suitable for operando investigations, since it does not require ultra high vacuum conditions or long-range order in the sample. Furthermore, it provides in situ information on oxidation state, adsorbed species and catalyst structure, and thus complements ex situ information, e.g. from X-ray diffraction (structure), X-ray photoelectron spectroscopy (oxidation state) and FTIR (adsorbates) nicely. In a spectroelectrochemistry experiment, XAS can be combined with different electrochemical techniques in order to satisfy different needs and scientific aims. Spectra of both a Pt–Ru anode catalyst and a Pt–Co cathode catalyst were recorded at different potentials, while measuring the current-potential characteristics of a single cell. So-called half-cell measurements, where the former fuel cell cathode was used with hydrogen as the reference electrode, were performed in water and ethanol to obtain a more detailed mechanistic insight into the ethanol electrooxidation. From a more industrial point of view, different catalysts were tested with a fast potential cycling protocol simulating rapid load changes in a vehicle. |
| Starting Page | 877 |
| Ending Page | 883 |
| Page Count | 7 |
| File Format | |
| ISSN | 0021891X |
| Journal | Journal of Applied Electrochemistry |
| Volume Number | 40 |
| Issue Number | 5 |
| e-ISSN | 15728838 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2009-05-13 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | In situ Fuel cells X-ray absorption spectroscopy Spectroelectrochemistry Operando Industrial Chemistry/Chemical Engineering Physical Chemistry Electrochemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Materials Chemistry Chemical Engineering Electrochemistry |
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