Improved electrochemical performance of Fe-N-C catalysts through ionic liquid modification in alkaline media

Martinaiou I, Wolker T, Shahraei A, Zhang GR, Janßen A, Wagner S, Weidler N, Stark RW, Etzold BJ, Kramm UI (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Journal of Power Sources Elsevier

Book Volume: 375

Pages Range: 222-232

DOI: 10.1016/j.jpowsour.2017.07.028

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.

Authors with CRIS profile

Bastian Etzold

Involved external institutions

Technische Universität Darmstadt DE Germany (DE)

How to cite

APA:

Martinaiou, I., Wolker, T., Shahraei, A., Zhang, G.R., Janßen, A., Wagner, S.,... Kramm, U.I. (2018). Improved electrochemical performance of Fe-N-C catalysts through ionic liquid modification in alkaline media. Journal of Power Sources, 375, 222-232. https://doi.org/10.1016/j.jpowsour.2017.07.028

MLA:

Martinaiou, Ioanna, et al. "Improved electrochemical performance of Fe-N-C catalysts through ionic liquid modification in alkaline media." Journal of Power Sources 375 (2018): 222-232.

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