Kübler, Markus (2021)
Developing a New Synthesis Strategy for Fe-N-C Catalysts for the Oxygen Reduction Reaction in Proton-Exchange-Membrane Fuel Cells.
Technische Universität
doi: 10.26083/tuprints-00017885
Ph.D. Thesis, Primary publication, Publisher's Version
|
Text
(pdf)
2021_05_18_Developing a new Synthesis Strategy for Fe-N-C Catalysts for the Oxygen Reduction Reaction in Proton-Exchange-Membrane Fuel Cells.pdf Copyright Information: CC BY-SA 4.0 International - Creative Commons, Attribution ShareAlike. Download (10MB) | Preview |
Item Type: | Ph.D. Thesis | ||||
---|---|---|---|---|---|
Type of entry: | Primary publication | ||||
Title: | Developing a New Synthesis Strategy for Fe-N-C Catalysts for the Oxygen Reduction Reaction in Proton-Exchange-Membrane Fuel Cells | ||||
Language: | English | ||||
Referees: | Kramm, Prof. Dr. Ulrike I. ; Albert, Prof. Dr. Barbara | ||||
Date: | 2021 | ||||
Place of Publication: | Darmstadt | ||||
Collation: | xx, 181, VIII Seiten | ||||
Date of oral examination: | 5 July 2021 | ||||
DOI: | 10.26083/tuprints-00017885 | ||||
Abstract: | Within this work, a new synthesis method for a Fe-N-C catalyst is developed. Fe-N-C catalysts are considered promising materials for the replacement of expensive Pt and catalyze the oxygen reduction reaction (ORR) on the cathode inside proton-exchange-membrane fuel cells (PEMFCs). This work briefly summarizes the standpoint of current PEMFC technology and provides a detailed overview on the to this day reported synthesis methods and applied precursors for Fe-N-C catalysts. One major concern with the synthesis of Fe-N-C catalysts is that for a high performance often complex precursors like porphyrins or zeolitic imidazolate frameworks (ZIFs) are used. These precursors are expensive or not well suited for a scale-up [1-3]. Here, a new method is presented which is based on a cheap and simple polypyrrole precursor which at the same time yields catalysts with a high fuel cell performance. Important parameters for the new preparation method are systematically investigated and useful insights, for instance on the influence of the iron salt precursor, a bimetallic iron and manganese approach, the heat-treatment temperature, or the effectiveness of the acid leaching, are presented. The final catalyst of this work is compared to the best-off performing Fe-N-C catalysts reported in literature. Further, the overall preparation method is briefly discussed with respect to its scale-up practicability by comparing the individual synthesis steps to the to this day commercially most advanced Fe-N-C catalysts. |
||||
Alternative Abstract: |
|
||||
Status: | Publisher's Version | ||||
URN: | urn:nbn:de:tuda-tuprints-178853 | ||||
Classification DDC: | 500 Science and mathematics > 540 Chemistry | ||||
Divisions: | 07 Department of Chemistry > Fachgebiet Anorganische Chemie > Catalysts and Electrocatalysts 07 Department of Chemistry > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie > Catalysts and Electrocatalysts |
||||
Date Deposited: | 15 Dec 2021 13:35 | ||||
Last Modified: | 15 Dec 2021 13:35 | ||||
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/17885 | ||||
PPN: | 489278833 | ||||
Export: |
View Item |