Publikationen

Publikationen (peer-reviewed)

Reseacher-ID: C-3456-2014, google scholar: Ulrike I. Kramm

2017

35 Leonard, N.; Wagner, S., Luo, F., Steinberg, J., Ju, W., Weidler, N., Wang, H., Kramm, U. I., Strasser, P. (2017), Deconvolution of Utilization, Site Density, and Turn-over-Frequency of Fe-Nitrogen-Carbon ORR Catalysts Prepared with Secondary N-Precursors. ACS Catalysis accepted
34 Wagner, S., Martinaiou, I., Shahraei, A., Weidler, N., Kramm, U.I.* (2017), On the effect of sulfite ions on the structural composition and ORR activity of Fe-N-C catalysts, Hyperfine Interactions, accepted.
33 Chenitz, R., Kramm, U.I., Lefèvre, M., Glibin, V., Dodelet, J.-P.* (2017), Demetalation of Fe-N4 catalytic sites in the micropores of NC_Ar+NH3 is at the origin of the initial activity loss of this highly active Fe/N/C catalyst used for the reduction of oxygen in PEM fuel cells, Energy and Environmental Science, DOI: 10.1039/c7ee02302b.
32
Janßen, A., Martinaiou, I., Wagner, S., Weidler, N., Shahraei, A., Kramm, U.I.* (2017), Influence of sulfur in the precursor mixture on the structural composition of Fe-N-C catalysts, Hyperfine Interactions 239, 7, DOI: 10.1007/s10751-017-1481-z
31. Kramm, U.I.*, Shahraei A., Martinaiou, I., (2017), Metall-N-C-Katalysatoren in der Elektro¬katalyse, GDCh-Nachrichten, 11/2017.
31 Kramm, U.I.*, Shahraei A., Martinaiou, I., (2017), Metall-N-C-Katalysatoren in der Elektro¬katalyse, GDCh-Nachrichten, 11/2017.
30 Weidler, N., Babu, D. J., Martinaiou, I., Paul, S., Wagner, S., Shahraei, A., Janßen, A., Stark, R. W., Schneider, J.J., Kramm, U.I.* (2017), Effect of Plasma Etching on the Activity and Selectivity of Me-N-C Electrocatalysts for the Oxygen Reduction Reaction, ECS Trans. 80(8), 691-700.
29 Martinaiou, M., Wolker, Th., Shahraei, A., Zhang, G.-R., Janßen, A., Wagner, S., Weidler, N., Stark, R.W., Etzold, B.J.M.*, Kramm, U.I.* (2017), Improved electrochemical performance of Fe-N-C catalysts through ionic liquid modification in alkaline media, J. Power Sources, doi: 10.1016/j.jpowsour.2017.07.028.
28 Shahraei, A., Moradabadi, A., Martinaiou, I., Kaghazchi, P., Kramm, U.I. * (2017), Elucidating the origin of HER activity in mono- and bimetallic metal- and nitrogen-doped carbon catalysts (Me-N-C), ACS Appl. Mater. Interfaces 9(38), 25184-25193.
27 Ioanna Martinaiou, Ali Shahraei, C. Wittich, J. Kleebe, R. Stark, Ulrike I. Kramm*, Effect of metal species on the stability of Me-N-C catalysts during accelerated stress tests mimicking the start-up and shut-down conditions, Electrochim. Acta, doi 10.1016/j.electacta.2017.04.134 (special issue for ISE conference The Hague 2016, invited paper).
26 Hamm, C. M.; Bocarsly, J.; Seward, G.; Kramm, U.I.; Birkel, C.S. (2016) Non-conventional synthesis and magnetic properties of MAX phases (Cr/Mn)2AlC and (Cr/Fe)2AlC, J. Mater. Chem. A., doi 10.1039/C7TC00112F.

2016

25. Busch, M.; Halck, N. B.; Kramm, U.; Siahrostami, S.; Krtil, P.; Rossmeisl, J. (2016) Beyond the vulcano? – A unified approach to electrocatalytic oxygen reduction and oxygen evolution: Nano Energy 29, 126-135 (invited paper).
24. Kramm, U. I.*; Herrmann-Geppert, I.; Behrends, J.; Lips, K.; Fiechter, S.; Bogdanoff, P (2016) On an Easy Way To Prepare Metal–Nitrogen Doped Carbon with Exclusive Presence of MeN4-type Sites Active for the ORR. J. Am. Chem. Soc., 138 (2), 635–640.
23. Kramm, U.I.*, Zana A., Vosch T., Fiechter S., Arenz M., Schmeißer, D. (2016) On the structural composition and stability of Fe-N-C catalysts prepared by an intermediate acid leaching, Journal of Solid State Electrochemistry, 20, 969-981 (invited paper).

2015

22. Sahraie, N.R. & Kramm U.I., Steinberg J., Zhang Y., Thomas A., Reier T. , Paraknowitsch J.-P., Strasser P. (2015) Quantifying the density and utilization of active sites in non-precious metal oxygen electroreduction catalysts, Nature Commun. 6, 8618, doi: 10.1038/ncomms9618
21. Brüller S., Liang H.-W., Kramm U.I., Feng X., Müllen K. (2015) Bimetallic porous porphyrin polymer-derived non-precious metal electrocatalysts for oxygen reduction reaction, J. Mater. Chem. A 3, 23799-23808.
20. Kramm, U.I., Zana A., Vosch T., Fiechter S., Arenz M., Schmeißer, D. (2015) On the structural composition and stability of Fe-N-C catalysts prepared by an intermediate acid leaching, Journal of Solid State Electrochemistry, accepted

Publikationen (peer-reviewed)

Reseacher-ID: C-3456-2014, google scholar: Ulrike I. Kramm

Ältere Arbeiten (vorherige Tätigkeiten)

17. Kramm UI, Lefèvre M, Bogdanoff P, Schmeißer D, Dodelet JP (2014), Analyzing Structural Changes of Fe–N–C Cathode Catalysts in PEM Fuel Cell by Mößbauer Spectroscopy of Complete Membrane Electrode Assemblies, J. Phys. Chem. Lett. 5 (21), 3750-3756.
16. Szakacs C.E., Lefèvre M., Kramm U.I., Dodelet J.-P., Vidal F. (2014) Density functional theory study of catalytic sites for oxygen reduction in Fe/N/C catalysts used in H2/O2 fuel cells. Phys.Chem.Chem.Phys., 16, 13654-13661.
15. Kramm UI., Lefèvre M., Larouche N., Schmeißer D., Dodelet J.-P. (2014). Correlations between Mass Activity and Physicochemical Properties of Fe/N/C Catalysts for the ORR in PEM Fuel Cell via 57Fe Mössbauer Spectroscopy and Other Techniques. J. Am. Chem. Soc., 136, 978-985.
14. Kramm UI., Herrmann-Geppert I., Fiechter S., Zehl G., Zizak I., Dorbandt I., Schmeißer D., Bogdanoff P (2014). Effect of iron-carbide formation on the number of active sites in Fe-N-C catalysts for the oxygen reduction reaction in acidic media. J. Mater. Chem. A, 2, 2663-2670.
13. Kramm UI., Herranz J., Larouche N., Arruda T. M., Lefèvre M., Jaouen F., Bogdanoff P., Fiechter S., Abs-Wurmbach I., Mukerjee S., Dodelet J.-P. (2012). Structure of the catalytic sites in Fe/N/C-catalysts for O2-reduction in PEM fuel cells. Phys.Chem.Chem.Phys., 14, 11673–11688.
12. Ferrandon M., Kropf A. J., Myers D. J., Artyushkova K., Kramm U., Bogdanoff P., Wu G., Johnston C., Zelenay P. (2012). Multitechnique Characterization of a Polyaniline-Iron-Carbon Oxygen Reduction Catalyst. J. Phys. Chem. C, 116(30), 16001–16013.
11. Müller, K., Richter, M., Friedrich, D., Paloumpa, I., Kramm, U. I., Schmeißer, D. (2012). Spectroscopic charac­terization of Cobalt–Phthalocyanine electrocatalysts for fuel cell applications. Solid State Ionics, 216, 78–82.
10. Kramm Ulrike I., Herrmann-Geppert I., Bogdanoff P., Fiechter S. (2011). Effect of an Ammonia Treat­ment on Structure, Composition, and Oxygen Reduction Reaction Activity of Fe-N-C Catalysts. J. Phys. Chem. C, 115, 23417–23427.
9. Kramm U. I., Abs-Wurmbach I., Herrmann-Geppert I., Radnik J., Fiechter S., Bogdanoff P. (2011). Influence of the Electron-Density of FeN4-Centers Towards the Catalytic Activity of Pyrolyzed FeTMPPCl-Based ORR-Electro­catalysts. J. Electrochem. Soc., 158(1), B69–B78.
8. Herranz J., Jaouen F., Lefèvre M., Kramm U. I., Proietti E., Dodelet J.-P., Bogdanoff P., Fiechter S., Abs-Wurm­bach I., Bertrand P., Arruda T.M., Mukerjee S. (2011). Unveiling N-Protonation and Anion-Binding Effects on Fe/N/C Catalysts for O2 Reduction in Proton-Exchange-Membrane Fuel Cells. J. Phys. Chem. C, 115, 16087–16097.
7. Herrmann, Iris, Kramm U. I., Fiechter S., Brüser V., Kersten H., Bogdanoff P. (2010). Comparative Study of the Carboni­sation of CoTMPP by Low Temperature Plasma and Heat Treatment. Plasma Processes and Polymers, 7(6), 515–526.
6. Jaouen F., Herranz J., Lefèvre M., Dodelet J.-P., Kramm U. I., Herrmann I., Bogdanoff P., Maruyama J., Nagaoka T., Garsuch A., Dahn J.R., Olson T., Pylypenko S., Atanassov P., Ustinov E.A. (2009). Cross-laboratory experimental study of non-noble-metal electrocatalysts for the oxygen reduction reaction. ACS Applied Materials & Interfaces, 1(8), 1623–1639.
5. Herrmann I., Kramm U. I., Fiechter S., Bogdanoff P. (2009). Oxalate supported pyrolysis of CoTMPP as electro­catalysts for the oxygen reduction reaction. Electrochim. Acta, 54(18), 4275–4287.
4. Herrmann I., Kramm U. I., Radnik J., Fiechter S., Bogdanoff P. (2009). Influence of Sulfur on the Pyrolysis of CoTMPP as Electrocatalyst for the Oxygen Reduction Reaction. J. Electrochem. Soc., 156(10), B1283–B1292.
3. Koslowski U. I., Abs-Wurmbach I., Fiechter S., Bogdanoff P. (2008). Nature of the Catalytic Cen­ters of Porphyrin-Based Electrocatalysts for the ORR: A Correlation of Kinetic Current Density with the Site Density of Fe−N4 Centers. J. Phys. Chem. C, 112(39), 15356–15366.
2. Tributsch H., Koslowski U. I., Dorbandt I. (2008). Experimental and theoretical modeling of Fe-, Co-, Cu-, Mn-based electrocatalysts for oxygen reduction. Electrochim. Acta, 53, 2198–2209.
1. Koslowski U.I., Ellmer K., Bogdanoff P., Dittrich T., Guminskaya T., Tributsch H. (2006) Structural, electrical, optical, and photoelectrochemical properties of thin titanium oxinitride films TiO2-2xNx with 0 ≤ x ≤ 1. J. Vacuum Sci. A, 24, 2199-2205.