|Cross-laboratory experimental study of non-noble-metal electrocatalysts for the oxygen reduction reaction|
F Jaouen, J Herranz, M Lefevre, JP Dodelet, UI Kramm, I Herrmann, ...
ACS applied materials & interfaces 1 (8), 1623-1639, 2009
|Structure of the catalytic sites in Fe/N/C-catalysts for O 2-reduction in PEM fuel cells|
UI Kramm, J Herranz, N Larouche, TM Arruda, M Lefèvre, F Jaouen, ...
Physical Chemistry Chemical Physics 14 (33), 11673-11688, 2012
|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|
UI Koslowski, I Abs-Wurmbach, S Fiechter, P Bogdanoff
The Journal of Physical Chemistry C 112 (39), 15356-15366, 2008
|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|
UI Kramm, M Lefèvre, N Larouche, D Schmeisser, JP Dodelet
Journal of the American Chemical Society 136 (3), 978-985, 2014
|Quantifying the density and utilization of active sites in non-precious metal oxygen electroreduction catalysts|
NR Sahraie, UI Kramm, J Steinberg, Y Zhang, A Thomas, T Reier, ...
Nature communications 6 (1), 1-9, 2015
|Multitechnique characterization of a polyaniline–iron–carbon oxygen reduction catalyst|
M Ferrandon, AJ Kropf, DJ Myers, K Artyushkova, U Kramm, P Bogdanoff, ...
The Journal of Physical Chemistry C 116 (30), 16001-16013, 2012
|On an Easy Way To Prepare Metal–Nitrogen Doped Carbon with Exclusive Presence of MeN4-type Sites Active for the ORR|
UI Kramm, I Herrmann-Geppert, J Behrends, K Lips, S Fiechter, ...
Journal of the American Chemical Society 138 (2), 635-640, 2016
|Unveiling N-Protonation and Anion-Binding Effects on Fe/N/C Catalysts for O2 Reduction in Proton-Exchange-Membrane Fuel Cells|
J Herranz, F Jaouen, M Lefèvre, UI Kramm, E Proietti, JP Dodelet, ...
The Journal of Physical Chemistry C 115 (32), 16087-16097, 2011
|High-performance fuel cell cathodes exclusively containing atomically dispersed iron active sites|
H Zhang, HT Chung, DA Cullen, S Wagner, UI Kramm, KL More, ...
Energy & Environmental Science 12 (8), 2548-2558, 2019
|Influence of the electron-density of FeN4-centers towards the catalytic activity of pyrolyzed FeTMPPCl-based ORR-electrocatalysts|
UI Kramm, I Abs-Wurmbach, I Herrmann-Geppert, J Radnik, S Fiechter, ...
Journal of the Electrochemical Society 158 (1), B69, 2010
|Beyond the top of the volcano?–A unified approach to electrocatalytic oxygen reduction and oxygen evolution|
M Busch, NB Halck, UI Kramm, S Siahrostami, P Krtil, J Rossmeisl
Nano Energy 29, 126-135, 2016
|A specific demetalation of Fe–N 4 catalytic sites in the micropores of NC_Ar+ NH 3 is at the origin of the initial activity loss of the highly active Fe/N/C catalyst used for …|
R Chenitz, UI Kramm, M Lefèvre, V Glibin, G Zhang, S Sun, JP Dodelet
Energy & Environmental Science 11 (2), 365-382, 2018
|Influence of sulfur on the pyrolysis of CoTMPP as electrocatalyst for the oxygen reduction reaction|
I Herrmann, UI Kramm, J Radnik, S Fiechter, P Bogdanoff
Journal of The Electrochemical Society 156 (10), B1283, 2009
|Effect of an ammonia treatment on structure, composition, and oxygen reduction reaction activity of Fe–N–C catalysts|
UI Kramm, I Herrmann-Geppert, P Bogdanoff, S Fiechter
The Journal of Physical Chemistry C 115 (47), 23417-23427, 2011
|A density functional theory study of catalytic sites for oxygen reduction in Fe/N/C catalysts used in H 2/O 2 fuel cells|
CE Szakacs, M Lefèvre, UI Kramm, JP Dodelet, F Vidal
Physical Chemistry Chemical Physics 16 (27), 13654-13661, 2014
|Experimental and theoretical modeling of Fe-, Co-, Cu-, Mn-based electrocatalysts for oxygen reduction|
H Tributsch, UI Koslowski, I Dorbandt
Electrochimica Acta 53 (5), 2198-2209, 2008
|Effect of iron-carbide formation on the number of active sites in Fe–N–C catalysts for the oxygen reduction reaction in acidic media|
UI Kramm, I Herrmann-Geppert, S Fiechter, G Zehl, I Zizak, I Dorbandt, ...
Journal of Materials Chemistry A 2 (8), 2663-2670, 2014
|Oxalate supported pyrolysis of CoTMPP as electrocatalysts for the oxygen reduction reaction|
I Herrmann, UI Kramm, S Fiechter, P Bogdanoff
Electrochimica Acta 54 (18), 4275-4287, 2009
|Bimetallic porous porphyrin polymer-derived non-precious metal electrocatalysts for oxygen reduction reactions|
S Brüller, HW Liang, UI Kramm, JW Krumpfer, X Feng, K Müllen
Journal of Materials Chemistry A 3 (47), 23799-23808, 2015
|Deconvolution of Utilization, Site Density, and Turnover Frequency of Fe–Nitrogen–Carbon Oxygen Reduction Reaction Catalysts Prepared with Secondary N-Precursors|
ND Leonard, S Wagner, F Luo, J Steinberg, W Ju, N Weidler, H Wang, ...
ACS Catalysis 8 (3), 1640-1647, 2018