Martinaiou, Ioanna ; Wolker, Thomas ; Shahraei, Ali ; Zhang, Gui-Rong ; Janßen, Arne ; Wagner, Stephan ; Weidler, Natascha ; Stark, Robert W. ; Etzold, Bastian J. M. ; Kramm, Ulrike I. (2018)
Improved electrochemical performance of Fe-N-C catalysts through ionic liquid modification in alkaline media.
In: Journal of Power Sources, 375
doi: 10.1016/j.jpowsour.2017.07.028
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
It is well known that Fe-N-C catalysts reach a significantly better ORR activity in alkaline compared to acidic electrolyte. This advantage makes the material of interest for application in alkaline fuel cells. Beside this, for Pt/C catalyst it is known that the performance in acid can be significantly enhanced through ionic liquid modification following the Solid Catalysts with Ionic Liquid Layer (SCILL) concept. In our current study we combine both advantages and investigate for two Fe-N-C catalysts prepared either with or without sulfur in the precursor mixture the effect of IL modification. The unmodified catalysts are characterized using X-ray induced photoelectron spectroscopy (XPS), 57Fe Mößbauer and Raman spectroscopy as well as N2 sorption. The electrochemical behavior of the unmodified catalyst and with different pore-filling degrees of ionic liquid (IL) is analysed with respect to double layer capacitance, ORR activity and stability in accelerated stress tests mimicking the load-cycle conditions.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Martinaiou, Ioanna ; Wolker, Thomas ; Shahraei, Ali ; Zhang, Gui-Rong ; Janßen, Arne ; Wagner, Stephan ; Weidler, Natascha ; Stark, Robert W. ; Etzold, Bastian J. M. ; Kramm, Ulrike I. |
| Art des Eintrags: | Bibliographie |
| Titel: | Improved electrochemical performance of Fe-N-C catalysts through ionic liquid modification in alkaline media |
| Sprache: | Englisch |
| Publikationsjahr: | 31 Januar 2018 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Power Sources |
| Jahrgang/Volume einer Zeitschrift: | 375 |
| DOI: | 10.1016/j.jpowsour.2017.07.028 |
| URL / URN: | https://pdf.sciencedirectassets.com/271367/1-s2.0-S037877531... |
| Kurzbeschreibung (Abstract): | It is well known that Fe-N-C catalysts reach a significantly better ORR activity in alkaline compared to acidic electrolyte. This advantage makes the material of interest for application in alkaline fuel cells. Beside this, for Pt/C catalyst it is known that the performance in acid can be significantly enhanced through ionic liquid modification following the Solid Catalysts with Ionic Liquid Layer (SCILL) concept. In our current study we combine both advantages and investigate for two Fe-N-C catalysts prepared either with or without sulfur in the precursor mixture the effect of IL modification. The unmodified catalysts are characterized using X-ray induced photoelectron spectroscopy (XPS), 57Fe Mößbauer and Raman spectroscopy as well as N2 sorption. The electrochemical behavior of the unmodified catalyst and with different pore-filling degrees of ionic liquid (IL) is analysed with respect to double layer capacitance, ORR activity and stability in accelerated stress tests mimicking the load-cycle conditions. |
| Freie Schlagworte: | Fe-N-C catalyst, Oxygen reduction reaction, SCILL, Ionic liquid modification, Non-PGM catalyst |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie > Fachgruppe Katalysatoren und Elektrokatalysatoren 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Physics of Surfaces 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie 07 Fachbereich Chemie > Ernst-Berl-Institut > Fachgebiet Makromolekulare Chemie 07 Fachbereich Chemie > Ernst-Berl-Institut > Fachgebiet Technische Chemie 07 Fachbereich Chemie > Ernst-Berl-Institut > Fachgebiet Technische Chemie > Technische Chemie I |
| Hinterlegungsdatum: | 06 Jul 2018 12:22 |
| Letzte Änderung: | 18 Aug 2021 08:18 |
| PPN: | |
| Sponsoren: | Financial supports by the German research foundation via the Graduate School of Excellence Energy Science and Engineering (GSC1070) is gratefully acknowledged., Financial support by the federal ministry of education and research via the joint project NUKFER (05K16RD1) is gratefully acknowledged., Financial support by the NanoMatFutur young researcher group (03XP0092) are gratefully acknowledged by UIK and her group., TW, GRZ and BE acknowledge that this project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No 681719). |
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