Artikel

Siddiqui, Humera Khatoon ; Waidha, Aamir Iqbal ; Kanbach, Sabine ; Palakkal, Jasnamol Pezhumkattil ; Haller, Steffen ; Yadav, Sandeep ; Kleinschmidt, Peter ; Schneider, Jörg J. ; Clemens, Oliver ; Alff, Lambert ; Kramm, Ulrike I. (2024)
Influence of B-site variation on the bifunctional performance of LaFeₓCo₁₋ₓO₃ for Zn-air battery.
In: Electrochimica Acta, (500)
doi: 10.1016/j.electacta.2024.144711
Artikel, Bibliographie

Kuhn, Carola ; Knapp, Anna ; Deutschmann, Max P. ; Spielmann, Jonas ; Tischer, Steffen ; Kramm, Ulrike I. ; Nirschl, Hermann ; Deutschmann, Olaf (2024)
Iron as recyclable metal fuel: unraveling oxidation behavior and cyclization effects through thermogravimetric analysis, wide‐angle x‐ray scattering and Mössbauer spectroscopy.
In: ChemSusChem, 17 (15)
doi: 10.1002/cssc.202400351
Artikel, Bibliographie

Gridin, Vladislav ; Segura-Salas, Nicole ; Saveleva, Viktoriia A. ; Theis, Pascal ; Haller, Steffen ; Ribeiro, Catarina C. ; Hofmann, Kathrin ; Stark, Robert ; Kramm, Ulrike I. (2024)
Enhancing the Stability of FeNC Catalysts in PEMFCs by Improved Purification.
In: ACS Catalysis, 14 (14)
doi: 10.1021/acscatal.4c02930
Artikel, Bibliographie

Haller, Steffen ; Chaby Ribeiro, Catarina de ; Reinauer, Felix ; Yadav, Sandeep ; Ni, Lingmei ; Stark, Robert W. ; Schneider, Jörg J. ; Kramm, Ulrike I. (2024)
Influence of Hydrophilicity on the Performance of Bifunctional Cobalt-Based Catalysts in Zn–Air Batteries.
In: ACS Applied Energy Materials, 7 (11)
doi: 10.1021/acsaem.4c00153
Artikel, Bibliographie

Ding, Jinxue ; Tian, Chuanmu ; Li, Wei ; Spielmann, Jonas ; Maheu, Clément ; Kintop, Nina ; Widenmeyer, Marc ; Skokov, Konstantin P. ; Hofmann, Jan P. ; Kramm, Ulrike I. ; Xie, Wenjie ; Weidenkaff, Anke (2024)
Tuning anisotropic thermoelectric properties of TiS2–δ compounds via intercalating iron.
In: Journal of the European Ceramic Society, 44 (5)
doi: 10.1016/j.jeurceramsoc.2023.12.059
Artikel, Bibliographie

Heppe, Nils ; Gallenkamp, Charlotte ; Snitkoff-Sol, Rifael Z. ; Paul, Stephen D. ; Segura-Salas, Nicole ; Haak, Hendrik ; Moritz, Dominik C. ; Kaiser, Bernhard ; Jaegermann, Wolfram ; Potapkin, Vasily ; Jafari, Atefeh ; Schünemann, Volker ; Leupold, Olaf ; Elbaz, Lior ; Krewald, Vera ; Kramm, Ulrike I. (2024)
Applying nuclear forward scattering as in situ and operando tool for the characterization of FeN4 moieties in the hydrogen evolution reaction.
In: Journal of the American Chemical Society, 146 (18)
doi: 10.1021/jacs.4c00436
Artikel, Bibliographie

Spielmann, Jonas ; Braig, Daniel ; Streck, Antonia ; Gustmann, Tobias ; Kuhn, Carola ; Reinauer, Felix ; Kurnosov, Alexandr ; Leubner, Oliver ; Potapkin, Vasily ; Hasse, Christian ; Deutschmann, Olaf ; Etzold, Bastian J. M. ; Scholtissek, Arne ; Kramm, Ulrike I. (2024)
Exploring the oxidation behavior of undiluted and diluted iron particles for energy storage: Mössbauer spectroscopic analysis and kinetic modeling.
In: Physical Chemistry Chemical Physics, 26 (17)
doi: 10.1039/d3cp03484d
Artikel, Bibliographie

Gallenkamp, Charlotte ; Kramm, Ulrike I. ; Krewald, Vera (2024)
FeN4 environments upon reduction: a computational analysis of spin states, spectroscopic properties, and active species.
In: JACS Au - an open access journal of the American Chemical Society
doi: 10.1021/jacsau.3c00714
Artikel, Bibliographie

Kramm, Ulrike I. ; Elbaz, Lior (2023)
Modifying Fe-N interaction to boost catalytic performance.
In: Nature Catalysts, 6 (12)
doi: 10.1038/s41929-023-01080-6
Artikel, Bibliographie

Ni, Lingmei ; Davydova, Elena S. ; Singh, Ramesh K. ; Kolik-Shmuel, Lubov ; Dekel, Dario R. ; Kramm, Ulrike I. (2023)
Role of Fe in the hydrogen oxidation reaction in a NiFe-based catalyst: an in situ Mossbauer spectroscopic investigation.
In: Journal of Physics: Energy, 5 (3)
doi: 10.1088/2515-7655/acd661
Artikel, Bibliographie

Chen, Guangbo ; Lu, Ruihu ; Li, Chenzhao ; Yu, Jianmin ; Li, Xiaodong ; Ni, Lingmei ; Zhang, Qi ; Zhu, Guangqi ; Liu, Shengwen ; Zhang, Jiaxu ; Kramm, Ulrike I. ; Zhao, Yan ; Wu, Gang ; Xie, Jian ; Feng, Xinliang (2023)
Hierarchically porous carbons with highly curved surfaces for hosting single metal FeN4 sites as outstanding oxygen reduction catalysts.
In: Advanced Materials, 35 (32)
doi: 10.1002/adma.202300907
Artikel, Bibliographie

Gridin, Vladislav ; Kübler, Markus ; Hanstein, Tamara ; Heppe, Nils ; Salas, Nicole Segura ; Theis, Pascal ; Hofmann, Kathrin ; Kramm, Ulrike I. (2023)
Influence of the addition of nanoparticles on the oxygen reduction reaction characteristics of FeNC catalysts and the impact on the stability.
In: Journal of Power Sources, 561
doi: 10.1016/j.jpowsour.2023.232713
Artikel, Bibliographie

Gridin, Vladislav ; Du, Jia ; Haller, Steffen ; Theis, Pascal ; Hofmann, Kathrin ; Wiberg, Gustav K. H. ; Kramm, Ulrike I. ; Arenz, Matthias (2023)
GDE vs RDE: impact of operation conditions on intrinsic catalytic parameters of FeNC catalyst for the oxygen reduction reaction.
In: Electrochimica Acta, 444
doi: 10.1016/j.electacta.2023.142012
Artikel, Bibliographie

Gort, Christopher ; Buchheister, Paul W. ; Klingenhof, Malte ; Paul, Stephen D. ; Dionigi, Fabio ; Krol, Roel van de ; Kramm, Ulrike I. ; Jaegermann, Wolfram ; Hofmann, Jan P. ; Strasser, Peter ; Kaiser, Bernhard (2023)
Effect of Metal Layer Support Structures on the Catalytic Activity of NiFe(oxy)hydroxide (LDH) for the OER in Alkaline Media.
In: ChemCatChem, 15 (8)
doi: 10.1002/cctc.202201670
Artikel, Bibliographie

Saveleva, Viktoriia A. ; Kumar, Kavita ; Theis, Pascal ; Salas, Nicole Segura ; Kramm, Ulrike I. ; Jaouen, Frédéric ; Maillard, Frédéric ; Glatzel, Pieter (2023)
Fe–N–C electrocatalyst and its electrode: are we talking about the same material?
In: ACS Applied Energy Materials, 6 (2)
doi: 10.1021/acsaem.2c03736
Artikel, Bibliographie

Heppe, Nils ; Gallenkamp, Charlotte ; Paul, Stephen Daniel ; Segura-Salas, Nicole ; Rhein, Niklas von ; Kaiser, Bernd ; Jaegermann, Wolfram ; Jafari, Atefeh ; Sergueev, Ilya ; Krewald, Vera ; Kramm, Ulrike I. (2023)
Substituent effects in iron porphyrin catalysts for the hydrogen evolution reaction.
In: Chemistry – A European Journal, 29 (10)
doi: 10.1002/chem.202202465
Artikel, Bibliographie

Scharf, Janik ; Kübler, Markus ; Gridin, Vladislav ; Wallace, W. David Z. ; Ni, Lingmei ; Paul, Stephen Daniel ; Kramm, Ulrike I. (2022)
Relation between half-cell and fuel cell activity and stability of FeNC catalysts for the oxygen reduction reaction.
In: Sustainable Materials and Technologies, 2 (5)
doi: 10.1002/sus2.84
Artikel, Bibliographie

Ni, Lingmei ; Gallenkamp, Charlotte ; Wagner, Stephan ; Bill, Eckhard ; Krewald, Vera ; Kramm, Ulrike I. (2022)
Identification of the catalytically dominant iron environment in iron- and nitrogen-doped carbon catalysts for the oxygen reduction reaction.
In: Journal of the American Chemical Society, 144 (37)
doi: 10.1021/jacs.2c04865
Artikel, Bibliographie

Luo, Fang ; Wagner, Stephan ; Ju, Wen ; Primbs, Mathias ; Li, Shuang ; Wang, Huan ; Kramm, Ulrike I. ; Strasser, Peter (2022)
Kinetic diagnostics and synthetic design of platinum group metal-free electrocatalysts for the oxygen reduction reaction using reactivity maps and site utilization descriptors.
In: Journal of the American Society, 144 (30)
doi: 10.1021/jacs.2c01594
Artikel, Bibliographie

Wolker, Thomas ; Brunnengräber, Kai ; Martinaiou, Ioanna ; Lorenz, Nick ; Zhang, Gui-Rong ; Kramm, Ulrike I. ; Etzold, Bastian J. M. (2022)
The effect of temperature on ionic liquid modified Fe-N-C catalysts for alkaline oxygen reduction reaction.
In: Journal of Energy Chemistry, 68
doi: 10.1016/j.jechem.2021.11.042
Artikel, Bibliographie

Ebner, Kathrin ; Clark, Adam H. ; Saveleva, Viktoriia A. ; Smolentsev, Grigory ; Chen, Jingfeng ; Ni, Lingmei ; Zitolo, Andrea ; Jaouen, Frédéric ; Kramm, Ulrike I. ; Schmidt, Thomas J. ; Herranz, Juan (2022)
Time-resolved potential-induced changes in Fe/N/C-catalysts studied by in situ modulation excitation x-ray absorption spectroscopy.
In: Advanced Energy Materials, 12 (14)
doi: 10.1002/aenm.202103699
Artikel, Bibliographie

Ott, Alexander ; Peter, Johannes ; Wiehl, Leonore ; Potapkin, Vasily ; Kramm, Ulrike I. ; Kleebe, Hans‐Joachim ; Riedel, Ralf ; Ionescu, Emanuel (2022)
Conversion of a polysilazane‐modified cellulose‐based paper into a C/SiFe(N,C)O ceramic paper via thermal ammonolysis.
In: International Journal of Applied Ceramic Technology, 19 (2)
doi: 10.1111/ijac.13869
Artikel, Bibliographie

Tao, Xiafang ; Lu, Ruihu ; Ni, Lingmei ; Gridin, Vladislav ; Al-Hilfi, Samir H. ; Qiu, Zijie ; Zhao, Yan ; Kramm, Ulrike I. ; Zhou, Yazhou ; Müllen, Klaus (2022)
Facilitating the acidic oxygen reduction of Fe–N–C catalysts by fluorine-doping.
In: Materials Horizons, 9 (1)
doi: 10.1039/d1mh01307f
Artikel, Bibliographie

Prössl, Carolin ; Kübler, Markus ; Paul, Stephen ; Ni, Lingmei ; Kinkelin, Simon-Johannes ; Heppe, Nils ; Eberhardt, Klaus ; Geppert, Christopher ; Jaegermann, Wolfram ; Stark, Robert W. ; Bron, Michael ; Kramm, Ulrike I. (2022)
Impact of Ir modification on the durability of FeNC catalysts under start-up and shutdown cycle conditions.
In: Journal of Materials Chemistry A, 10 (11)
doi: 10.1039/D1TA04668C
Artikel, Bibliographie

Liu, Jun ; Zhao, Huaping ; Wang, Zhijie ; Hannappel, Thomas ; Kramm, Ulrike I. ; Etzold, Bastian J. M. ; Lei, Yong (2022)
Tandem Nanostructures: A Prospective Platform for Photoelectrochemical Water Splitting.
In: Solar RRL, 6 (9)
doi: 10.1002/solr.202200181
Artikel, Bibliographie

Oefner, Niklas ; Heck, Franziska ; Dürl, Marcel ; Schumacher, Leon ; Siddiqui, Humera Khatoon ; Kramm, Ulrike I. ; Hess, Christian ; Möller, Angela ; Albert, Barbara ; Etzold, Bastian J. M. (2021)
Activity, selectivity and initial degradation of iron molybdate in the oxidative dehydrogenation of ethanol.
In: ChemCatChem, 14 (4)
doi: 10.1002/cctc.202101219
Artikel, Bibliographie

Ni, Lingmei ; Theis, Pascal ; Paul, Stephen ; Stark, Robert W. ; Kramm, Ulrike I. (2021)
In situ 57Fe mössbauer study of a porphyrin based FeNC catalyst for ORR.
In: Electrochimica Acta, 395
doi: 10.1016/j.electacta.2021.139200
Artikel, Bibliographie

Theis, Pascal ; Wallace, W. David Z. ; Ni, Lingmei ; Kübler, Markus ; Schlander, Annika ; Stark, Robert W. ; Weidler, Natascha ; Gallei, Markus ; Kramm, Ulrike I. (2021)
Systematic study of precursor effects on structure and oxygen reduction reaction activity of FeNC catalysts.
In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 379 (2209)
doi: 10.1098/RSTA.2020.0337
Artikel, Bibliographie

Haller, Steffen ; Gridin, Vladislav ; Hofmann, Kathrin ; Stark, Robert W. ; Albert, Barbara ; Kramm, Ulrike I. (2021)
Application of Non‐Precious Bifunctional Catalysts for Metal‐Air Batteries.
In: Energy Technology, 9 (7)
doi: 10.1002/ente.202001106
Artikel, Bibliographie

Paul, Stephen ; Kao, Yi-Lin ; Ni, Lingmei ; Ehnert, Rayko ; Herrmann-Geppert, Iris ; Krol, Roel van de ; Stark, Robert W. ; Jaegermann, Wolfram ; Kramm, Ulrike I. ; Bogdanoff, Peter (2021)
Influence of the Metal Center in M–N–C Catalysts on the CO2 Reduction Reaction on Gas Diffusion Electrodes.
In: ACS Catalysis, 11 (9)
doi: 10.1021/acscatal.0c05596
Artikel, Bibliographie

Schuch, J. ; Klemenz, S. ; Schuldt, P. ; Zieschang, Anne-Marie ; Dolique, Stephanie ; Connor, P. ; Kaiser, B. ; Kramm, Ulrike I. ; Albert, Barbara ; Jaegermann, W. (2021)
Efficient Oxygen Evolution Electrocatalyst by Incorporation of Nickel into Nanoscale Dicobalt Boride.
In: ChemCatChem, 13 (7)
doi: 10.1002/cctc.202002030
Artikel, Bibliographie

Ni, Lingmei ; Gallenkamp, Charlotte ; Paul, Stephen ; Kübler, Markus ; Theis, Pascal ; Chabbra, Sonia ; Hofmann, Kathrin ; Bill, Eckhard ; Schnegg, Alexander ; Albert, Barbara ; Krewald, Vera ; Kramm, Ulrike I. (2021)
Active Site Identification in FeNC Catalysts and Their Assignment to the Oxygen Reduction Reaction Pathway by In Situ 57Fe Mössbauer Spectroscopy.
In: Advanced Energy and Sustainability Research
doi: 10.1002/aesr.202000064
Artikel, Bibliographie

Ebner, Kathrin ; Ni, Lingmei ; Saveleva, Viktoriia A. ; Le Monnier, Benjamin P. ; Clark, Adam H. ; Krumeich, Frank ; Nachtegaal, Maarten ; Luterbacher, Jeremy S. ; Kramm, Ulrike I. ; Schmidt, Thomas J. ; Herranz, Juan (2021)
57Fe-Enrichment effect on the composition and performance of Fe-based O2-reduction electrocatalysts.
In: Physical Chemistry Chemical Physics, 23 (15)
doi: 10.1039/d1cp00707f
Artikel, Bibliographie

Boldrin, Paul ; Malko, Daniel ; Mehmood, Asad ; Kramm, Ulrike I. ; Wagner, Stephan ; Paul, Stephen ; Weidler, Natascha ; Kucernak, Anthony (2021)
Deactivation, reactivation and super-activation of Fe-N/C oxygen reduction electrocatalysts: Gas sorption, physical and electrochemical investigation using NO and O2.
In: Applied Catalysis B: Environmental, 292
doi: 10.1016/j.apcatb.2021.120169
Artikel, Bibliographie

Prössl, Carolin ; Kübler, Markus ; Nowroozi, Mohammad Ali ; Paul, Stephen ; Clemens, Oliver ; Kramm, Ulrike I. (2021)
Investigation of the thermal removal steps of capping agents in the synthesis of bimetallic iridium-based catalysts for the ethanol oxidation reaction.
In: Physical Chemistry Chemical Physics, 23 (1)
doi: 10.1039/d0cp04900j
Artikel, Bibliographie

Saveleva, Viktoriia A. ; Ebner, Kathrin ; Ni, Lingmei ; Smolentsev, Grigory ; Klose, Daniel ; Zitolo, Andrea ; Marelli, Elena ; Li, Jingkun ; Medarde, Marisa ; Safonova, Olga V. ; Nachtegaal, Maarten ; Jaouen, Frédéric ; Kramm, Ulrike I. ; Schmidt, Thomas J. ; Herranz, Juan (2021)
Potential‐Induced Spin Changes in Fe/N/C Electrocatalysts Assessed by In Situ X‐ray Emission Spectroscopy.
In: Angewandte Chemie International Edition, 60 (21)
doi: 10.1002/anie.202016951
Artikel, Bibliographie

Dodelet, Jean-Pol ; Glibin, Vassili ; Zhang, Gaixia ; Kramm, Ulrike I. ; Chenitz, Régis ; Vidal, François ; Sun, Shuhui ; Dubois, Marc (2021)
Reply to the ‘Comment on “Non-PGM electrocatalysts for PEM fuel cells: effect of fluorination on the activity and stability of a highly active NC_Ar + NH3 catalyst”’ by Xi Yin, Edward F. Holby and Piotr Zelenay, Energy Environ. Sci., 10.1039/D0EE02069A.
In: Energy & Environmental Science, 14 (2)
doi: 10.1039/d0ee03431b
Artikel, Bibliographie

Gallenkamp, Charlotte ; Kramm, Ulrike I. ; Krewald, Vera (2021)
Spectroscopic discernibility of dopants and axial ligands in pyridinic FeN4 environments relevant to single-atom catalysts.
In: Chemical Communications, 57
doi: 10.1039/D0CC06237E
Artikel, Bibliographie

Iqbal Waidha, Aamir ; Khatoon Siddiqui, Humera ; Ikeda, Yuji ; Lepple, Maren ; Vasala, Sami ; Donzelli, Manuel ; Fortes, A. D. ; Slater, Peter ; Grabowski, Blazej ; Kramm, Ulrike I. ; Clemens, Oliver (2021)
Structural, Magnetic and Catalytic Properties of a New Vacancy Ordered Perovskite Type Barium Cobaltate BaCoO 2.67.
In: Chemistry – A European Journal, 27 (38)
doi: 10.1002/chem.202101167
Artikel, Bibliographie

Luo, Fang ; Wagner, Stephan ; Onishi, Ichiro ; Selve, Sören ; Li, Shuang ; Ju, Wen ; Wang, Huan ; Steinberg, Julian ; Thomas, Arne ; Kramm, Ulrike I. ; Strasser, Peter (2021)
Surface site density and utilization of platinum group metal (PGM)-free Fe–NC and FeNi–NC electrocatalysts for the oxygen reduction reaction.
In: Chemical Science, 12 (1)
doi: 10.1039/d0sc03280h
Artikel, Bibliographie

Gallenkamp, Charlotte ; Kramm, Ulrike I. ; Proppe, Jonny ; Krewald, Vera (2020)
Calibration of Computational Mössbauer Spectroscopy to Unravel Active Sites in FeNC-Catalysts for the Oxygen Reduction Reaction.
In: International Journal of Quantum Chemistry
doi: 10.1002/qua.26394
Artikel, Bibliographie

Martinaiou, Ioanna ; Monteverde Videla, Alessandro H. A. ; Weidler, Natascha ; Kübler, Markus ; Wallace, W. David Z. ; Paul, Stephen ; Wagner, Stephan ; Shahraei, Ali ; Stark, Robert W. ; Specchia, Stefania ; Kramm, Ulrike I. (2020)
Activity and degradation study of an Fe-N-C catalyst for ORR in Direct Methanol Fuel Cell (DMFC).
In: Applied Catalysis B: Environmental, 262
doi: 10.1016/j.apcatb.2019.118217
Artikel, Bibliographie

Waidha, Aamir Iqbal ; Ni, Lingmei ; Ali, Jasim ; Lepple, Maren ; Donzelli, Manuel ; Dasgupta, Supratik ; Wollstadt, Stephan ; Alff, Lambert ; Kramm, Ulrike I. ; Clemens, Oliver (2020)
Synthesis of bifunctional BaFe1−xCoxO3−y−δ(OH)y catalysts for the oxygen reduction reaction and oxygen evolution reaction.
In: Journal of Materials Chemistry A, 8 (2)
doi: 10.1039/C9TA10222A
Artikel, Bibliographie

Kübler, Markus ; Wagner, Stephan ; Jurzinsky, Tilman ; Paul, Stephen ; Weidler, Natascha ; Gomez Villa, Eduardo D. ; Cremers, Carsten ; Kramm, Ulrike I. (2020)
Impact of Surface Functionalization on the Intrinsic Properties of the Resulting Fe–N–C Catalysts for Fuel Cell Applications.
In: Energy Technology, 8 (9)
doi: 10.1002/ente.202000433
Artikel, Bibliographie

Luo, Fang ; Roy, Aaron ; Silvioli, Luca ; Cullen, David A. ; Zitolo, Andrea ; Sougrati, Moulay Tahar ; Oguz, Ismail Can ; Mineva, Tzonka ; Teschner, Detre ; Wagner, Stephan ; Wen, Ju ; Dionigi, Fabio ; Kramm, Ulrike I. ; Rossmeisl, Jan ; Jaouen, Frédéric ; Strasser, Peter (2020)
P-block single-metal-site tin/nitrogen-doped carbon fuel cell cathode catalyst for oxygen reduction reaction.
In: Nature Materials, 19 (11)
doi: 10.1038/s41563-020-0717-5
Artikel, Bibliographie

Wagner, Stephan ; Auerbach, Hendrik ; Tait, Claudia E. ; Martinaiou, Ioanna ; Kumar, Shyam C. N. ; Kübel, Christian ; Sergeev, Ilya ; Wille, Hans‐Christian ; Behrends, Jan ; Wolny, Juliusz A. ; Schünemann, Volker ; Kramm, Ulrike I. (2019)
Elucidating the Structural Composition of an Fe–N–C Catalyst by Nuclear‐ and Electron‐Resonance Techniques.
In: Angewandte Chemie International Edition, 58 (31)
doi: 10.1002/anie.201903753
Artikel, Bibliographie

Kramm, Ulrike I. ; Marschall, Roland ; Rose, Marcus (2019)
Pitfalls in Heterogeneous Thermal, Electro‐ and Photocatalysis.
In: ChemCatChem, 11 (11)
doi: 10.1002/cctc.201900137
Artikel, Bibliographie

Kramm, Ulrike I. ; Ni, Lingmei ; Wagner, Stephan (2019)
57Fe Mössbauer Spectroscopy Characterization of Electrocatalysts.
In: Advanced Materials, 31 (31)
doi: 10.1002/adma.201805623
Artikel, Bibliographie

Zhang, Hanguang ; Chung, Hoon T. ; Cullen, David A. ; Wagner, Stephan ; Kramm, Ulrike I. ; More, Karren L. ; Zelenay, Piotr ; Wu, Gang (2019)
High-performance fuel cell cathodes exclusively containing atomically dispersed iron active sites.
In: Energy & Environmental Science, 12 (8)
doi: 10.1039/c9ee00877b
Artikel, Bibliographie

Shahraei, Ali ; Kuebler, Markus ; Martinaiou, Ioanna ; Creutz, K. Alexander ; Wallace, W. David Z. ; Nowroozi, Mohammad A. ; Paul, Stephen ; Weidler, Natascha ; Stark, Robert W. ; Clemens, Oliver ; Kramm, Ulrike I. (2018)
On the role of hydroxide species in sulphur- and nitrogen-doped cobalt-based carbon catalysts for the oxygen evolution reaction.
In: Journal of Materials Chemistry A, 6 (44)
doi: 10.1039/C8TA05769A
Artikel, Bibliographie

Shahraei, Ali ; Martinaiou, Ioanna ; Creutz, Kim Alexander ; Kuebler, Markus ; Weidler, Natascha ; Ranecky, Simon Theophil ; Wallace, William David Zacharias ; Nowroozi, Mohammad Ali ; Clemens, Oliver ; Stark, Robert W. ; Kramm, Ulrike I. (2018)
Exploring Active Sites in Multi-heteroatom Doped Co-based Catalysts for Hydrogen Evolution Reaction.
In: Chemistry - A European Journal, 24 (48)
doi: 10.1002/chem.201802684
Artikel, Bibliographie

Tran, Minh H. ; Schäfer, Timo ; Shahraei, Ali ; Dürrschnabel, Michael ; Molina-Luna, Leopoldo ; Kramm, Ulrike I. ; Birkel, Christina S. (2018)
Adding a New Member to the MXene Family: Synthesis, Structure, and Electrocatalytic Activity for the Hydrogen Evolution Reaction of V4C3Tx.
In: ACS Applied Energy Materials, 1 (8)
doi: 10.1021/acsaem.8b00652
Artikel, Bibliographie

Schardt, Sven ; Weidler, Natascha ; Wallace, W. ; Martinaiou, Ioanna ; Stark, Robert ; Kramm, Ulrike I. (2018)
Influence of the Structure-Forming Agent on the Performance of Fe-N-C Catalysts.
In: Catalysts, 8 (7)
doi: 10.3390/catal8070260
Artikel, Bibliographie

Leonard, Nathaniel D. ; Wagner, Stephan ; Luo, Fang ; Steinberg, Julian ; Ju, Wen ; Weidler, Natascha ; Wang, Huan ; Kramm, Ulrike I. ; Strasser, Peter (2018)
Deconvolution of Utilization, Site Density, and Turnover Frequency of Fe–Nitrogen–Carbon Oxygen Reduction Reaction Catalysts Prepared with Secondary N-Precursors.
In: ACS Catalysis, 8 (3)
doi: 10.1021/acscatal.7b02897
Artikel, Bibliographie

Chenitz, Régis ; Kramm, Ulrike I. ; Lefèvre, Michel ; Glibin, Vassili ; Zhang, Gaixia ; Sun, Shuhui ; Dodelet, Jean-Pol (2018)
A specific demetalation of Fe–N4 catalytic sites in the micropores of NC_Ar + NH3 is at the origin of the initial activity loss of the highly active Fe/N/C catalyst used for the reduction of oxygen in PEM fuel cells.
In: Energy & Environmental Science, 11 (2)
doi: 10.1039/c7ee02302b
Artikel, Bibliographie

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

Wagner, S. ; Martinaiou, I. ; Shahraei, A. ; Weidler, N. ; Kramm, Ulrike I. (2018)
On the effect of sulfite ions on the structural composition and ORR activity of Fe-N-C catalysts.
In: Hyperfine Interactions, 239 (1)
doi: 10.1007/s10751-017-1485-8
Artikel, Bibliographie

Martinaiou, Ioanna ; Shahraei, Ali ; Grimm, Fabian ; Zhang, Hongbin ; Wittich, Carolin ; Klemenz, Sebastian ; Dolique, Stephanie J. ; Kleebe, Hans-Joachim ; Stark, Robert W. ; Kramm, Ulrike I. (2017)
Effect of metal species on the stability of Me-N-C catalysts during accelerated stress tests mimicking the start-up and shut-down conditions.
In: Electrochimica Acta, 243
doi: 10.1016/j.electacta.2017.04.134
Artikel, Bibliographie

Shahraei, Ali ; Moradabadi, Ashkan ; Martinaiou, Ioanna ; Lauterbach, Stefan ; Klemenz, Sebastian ; Dolique, Stephanie ; Kleebe, Hans-Joachim ; Kaghazchi, Payam ; Kramm, Ulrike I. (2017)
Elucidating the Origin of Hydrogen Evolution Reaction Activity in Mono- and Bimetallic Metal- and Nitrogen-Doped Carbon Catalysts (Me–N–C).
In: ACS Applied Materials & Interfaces, 9 (30)
doi: 10.1021/acsami.7b01647
Artikel, Bibliographie

Hamm, Christin M. ; Bocarsly, Joshua D. ; Seward, Gareth ; Kramm, Ulrike I. ; Birkel, Christina S. (2017)
Non-conventional synthesis and magnetic properties of MAX phases (Cr/Mn)2AlC and (Cr/Fe)2AlC.
In: Journal of Materials Chemistry C, 5 (23)
doi: 10.1039/C7TC00112F
Artikel, Bibliographie

Weidler, Natascha ; Babu, Deepu J. ; Martinaiou, Ioanna ; Paul, Stephen ; Wagner, Stephan ; Shahraei, Ali ; Janßen, Arne ; Stark, Robert W. ; Schneider, Jörg J. ; Kramm, Ulrike I. (2017)
Effect of rf-Plasma Treatment on the Activity and Selectivity of Me-N-C Electrocatalysts for the Oxygen Reduction Reaction.
In: ECS Transactions, 80 (8)
doi: 10.1149/08008.0691ecst
Artikel, Bibliographie

Busch, Michael ; Halck, Niels B. ; Kramm, Ulrike I. ; Siahrostami, Samira ; Krtil, Petr ; Rossmeisl, Jan (2016)
Beyond the top of the volcano? – A unified approach to electrocatalytic oxygen reduction and oxygen evolution.
In: Nano Energy, 29
doi: 10.1016/j.nanoen.2016.04.011
Artikel, Bibliographie

Kramm, Ulrike I. ; Herrmann-Geppert, Iris ; Behrends, Jan ; Lips, Klaus ; Fiechter, Sebastian ; Bogdanoff, Peter (2016)
On an Easy Way To Prepare Metal–Nitrogen Doped Carbon with Exclusive Presence of MeN4-type Sites Active for the ORR.
In: Journal of the American Chemical Society, 138 (2)
doi: 10.1021/jacs.5b11015
Artikel, Bibliographie

Brüller, Sebastian ; Liang, Hai-Wei ; Kramm, Ulrike I. ; Krumpfer, Joseph W. ; Feng, Xinliang ; Müllen, Klaus (2015)
Bimetallic porous porphyrin polymer-derived non-precious metal electrocatalysts for oxygen reduction reactions.
In: Journal of Materials Chemistry A, 3 (47)
doi: 10.1039/C5TA06309D
Artikel, Bibliographie

Sahraie, Nastaran Ranjbar ; Kramm, Ulrike I. ; Steinberg, Julian ; Zhang, Yuanjian ; Thomas, Arne ; Reier, Tobias ; Paraknowitsch, Jens-Peter ; Strasser, Peter (2015)
Quantifying the density and utilization of active sites in non-precious metal oxygen electroreduction catalysts.
In: Nature Communications, 6
doi: 10.1038/ncomms9618
Artikel, Bibliographie

Kramm, Ulrike I. ; Zana, Alessandro ; Vosch, Tom ; Fiechter, Sebastian ; Arenz, Matthias ; Schmeißer, Dieter (2015)
On the structural composition and stability of Fe–N–C catalysts prepared by an intermediate acid leaching.
In: Journal of Solid State Electrochemistry, 20
doi: 10.1007/s10008-015-3060-z
Artikel, Bibliographie

Buchkapitel

Kramm, Ulrike I.
Hrsg.: Feng, Xinliang (2015)
Spectroscopic Analysis of Nanocarbon-Based non-precious Metal Catalyst for ORR.
In: Nanocarbons for Advanced Energy Conversion
doi: 10.1002/9783527680016.ch5
Buchkapitel, Bibliographie