at Google ScholarTitle data
Delikaya, Öznur ; Zeyat, Mohammad ; Lentz, Dieter ; Roth, Christina:
Organic Additives to Improve Catalyst Performance for High‐Temperature Polymer Electrolyte Membrane Fuel Cells.
In: ChemElectroChem.
Vol. 6
(2019)
Issue 15
.
- pp. 3892-3900.
ISSN 2196-0216
DOI: https://doi.org/10.1002/celc.201900251
Abstract in another language
High‐temperature polymer electrolyte membrane fuel cells are promising alternatives to low temperature fuel cells, owing to their higher operating temperatures, which allow for easier water management and enhanced catalytic activity. However, their performance suffers from low oxygen solubility in the electrolyte and phosphoric acid poisoning of catalytically active Pt sites. In this work, we developed new organic additives that provide π‐π stacking of the commercially applied carbon support materials as well as variable substitutable functionalities to interact with the Pt nanoparticles. Different electrochemical methods, such as cyclic voltammetry and linear sweep voltammetry, were performed to test the effect of these organic additives on the onset potential, limiting current, and the number of transferred electrons. It is observed that the limiting currents increase for the additive‐modified Pt/C samples, whereas the onset potential for significant oxygen reduction reaction activity remains unchanged. We conclude that enhanced oxygen solubility at the electrode/electrolyte interface is the reason for the observed behavior.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Institutions of the University: | Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering > Chair Electrochemical Process Engineering - Univ.-Prof. Dr. Christina Roth Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 540 Chemistry 600 Technology, medicine, applied sciences > 620 Engineering |
| Date Deposited: | 28 Apr 2021 11:11 |
| Last Modified: | 28 Apr 2021 11:11 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/64975 |