Publications

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  • C. Roth, D. E. Ramaker, ‘EXAFS investigations of PEM fuel cells’. Modern Aspects of Electrochemistry, ed. C. Vayenas, 51, chapter 3 (2011) 159-201.

  • C. Roth, D. E. Ramaker, ‘Operando XAS techniques: Past, present, future’, Fuel Cell Science, ed. A. Wieckowski, (2010) 511-544.

  • H. Schulenburg, C. Roth, ‘Advanced electron microscopy techniques for the detailed characterization of fuel cell components’, Polymer electrolyte membrane and direct methanol fuel cell technology (PEMFCs and DMFCs), Vol. 2, ed. C. Hartnig, C. Roth, Woodhead Publishing 2012, 26-64.

  • D. E. Ramaker, C. Roth, ‘The ∆µ XANES techniques as applied in Electrocatalysis, PEMFCs and DAFCs’, Polymer electrolyte membrane and direct methanol fuel cell technology (PEMFCs and DMFCs), Vol. 2, ed. C. Hartnig, C. Roth, Woodhead Publishing 2012, 120-145.

  • M. Bron, C. Roth, ‘Fuel cell catalysis from a materials perspective’. New and future developments in catalysis, ed. S. L. Suib, Elsevier, chapter 10 (2013) 271-305.

  • M. Bron, C. Roth, “Carbon materials in low-temperature polymer electrolyte membrane fuel cells”, in: Electrochemistry of carbon electrodes, ed. by P. Bartlett, Wiley (2015) im Druck.

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  • Polymer electrolyte membrane and direct methanol fuel cell technology (PEMFCs and DMFCs), Vol. 1 and 2, ed. C. Hartnig, C. Roth, Woodhead Publishing 2012.

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2014

  • C. Roth, “In-operando characterization of HT-PEM fuel cells operating at 180°C using X-ray absorption spectroscopy”, Helmholtz Zentrum für Materialien und Energie, 24.02.2014

  • C. Roth, S. Kaserer, K. M. Caldwell, D. E. Ramaker, “In-situ X-ray absorption spectroscopy elucidating mechanisms in HT-PEM fuel cells”, ECS Spring Meeting Orlando, 12 May 2014.

  • C. Roth,“How to safe money - edelmetall-reduzierte und edelmetallfreie Katalysatorkonzepte für Brennstoffzellen“, Marktplatz Zulieferer, Berlin, 21.05.2014

  • C.Roth, “Methods and materials development for electrochemical energy technologies”, Electrochemical Interfaces: Recent Topics and Open Questions, Sept. 30. - Oct. 02. 2014 Weierstrass-Institute Berlin

2013

  • A. Schoekel, C. Brieger, C. Roth, „Ruthenium dissolution in DMFCs”, Chemener 2013, 27.-30.01.2013, Berlin

  • C. Roth, “Alternative support materials for fuel cells: How to obtain porous electrodes”, International Symposium on Chemistry for Energy Conversion and Storage, Berlin, Januar 2013.

  • C. Roth, J. Melke, B. Peter, K. Bachtin, „Methods to study the carbon component in fuel cells, redox flow batteries and lithium ion batteries“, MRS Spring Meeting, San Francisco, 01. – 05. April 2013 (eingeladen).

  • A. Wolz, C. Roth, “Pt decorated Sb-doped tin oxide nanoparticles @ PANI hollow spheres as PEMFC electrode building material”, 5th International Conference on Fundamentals & Development of Fuel Cells in Karlsruhe, 16.-18. April 2013.

  • K. Bachtin, R. Chen, S. Indris, K. Nikolowski, C. Roth, H. Ehrenberg, “Electrospun cathode materials for lithium ion batteries”, 2nd International Conference on Materials for Energy EnMat II, Karlsruhe, 12.05. - 16.05.2013.

  • A. Wolz, M. Michel, C. Roth, „Novel strategies for the integration of oxide-supported Pt nanoparticles into PEMFC cathodes“, 2nd International Conference on Materials for Energy, Karlsruhe, 12.-16. Mai 2013

  • K. Bachtin, M. Kaus, S. Indris, C. Roth, H. Ehrenberg, „3D-Strukturierung von Elektroden durch Elektrospinning am Beispiel einer LiFePO4-Kathode für Lithium-ionen-Batterien“, 113. Bunsentagung 31.5.2014, Hamburg.

  • C. Roth, “Carbon – the black sheep in electrochemistry?”, Electrochemistry conference, Southampton, 31 May 2013.

2012

  • S. Kaserer, C. Roth, „In-operando investigations of Adsorption and Poisoning Processes on Pt Catalyst Surfaces in HT-PEM fuel cells”, HT-PEM seminar, 3. December 2012, Jülich, Germany (eingeladen)

  • S. Kaserer, J. Melke, A. Schoekel, C. Roth, „Separation of anode and cathode potentials in high temperature PEM fuel cells”, Electromembrane Processes and Materials, 26-29 August 2012, Cesky Krumlov, Czech Republic

  • Krystyna Bachtin, Benedikt Peter, Christina Roth, „3D structuring of electrodes for fuel cells and batteries with polyaniline (PANI)”, 13th Ulm ElectroChemical Talks (UECT),Ulm, 3 - 5 Juli 2012 53

  • S. Kaserer, K. Caldwell, D.E. Ramaker, C. Roth, „Analysing the influence of H3PO4 as Catalyst Poison in High Temperature PEM Fuel Cells using in-situ X-ray Absorption Spectroscopy”, 220th Electrochemical Society Meeting, 9-14 October 2011, Boston, USA

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2015

  • A. Fetyan, I. Derr, M. K. Kayarkatte, J. Langner, D. Bernsmeier, R. Kraehnert and C. Roth, “Electro-Spun Based Carbon Nano-Fibers as Alternative electrode Materials for Vanadium Redox Flow Batteries”, ChemElectroChem (DOI 10.1002/celc.201500284)

  • C. Roth, S. Kaserer, C. Brieger, K. M. Caldwell, J. Melke, and D. E. Ramaker, “The Power of In-Situ Studies: How X-ray Absorption Spectroscopy can help to develop PEMFC Catalysts with Increased Activity and Stability”, ECST (2015) 69 (17): 147 - 56, doi: 10.1149/06917.0147ecst

  • C. Brieger, J. Melke, P. Kaghazchi, and C. Roth, “CO Adsorption on Platinum Nanoparticles - the Importance of Size Distribution Studied with In-Situ DRIFTS and DFT Calculations”, ECST (2015), 69 (17): 249-53m, doi: 10.1149/06917.0249ecst

  • D. E. Ramaker and C. Roth, “The nature of the intermediate binding sites in the hydrogen oxidation/evolution over Pt surfaces important to fuel cell and electrolysis in alkaline and acidic media”, Chemelectrochem (2015), 2 (10), 1582 - 1594.

  • K. M. Caldwell, S. Kaserer, C. Roth, D. Ramaker, „Following adsorbate coverage on the anode of high temperature PEM fuel cells in the presence of CO and H2O using in-operando x-ray absorption spectroscopy“, Chemelectrochem (2015), 2 (10) 1502 - 1509.

2014

  • F. Muench, T. Seidl, M. Rauber, B. Peter, J. Brotz, M. Krause, C. Trautmann, C. Roth, S. Katusic, W. Ensinger, “Hierarchically porous carbon membranes containing designed nanochannel architectures obtained by pyrolysis of ion-track etched polyimide”, Materials Chemistry and Physics 148 (3) (2014) 846 – 853.

  • J. Melke, P. Jakes, J. Langner, L. Riekehr, U. Kunz, Z. Zhao-Karge, A. Nefedov, H. Sezen, C. Wöll, H. Ehrenberg, C. Roth, "Carbon Materials for the positive electrode in all-Vanadium Redox Flow Batteries", Carbon 78 (2014) 220–230.

  • B. Peter, J. Melke, F. Muench, W. Ensinger, C. Roth, “Stable platinum nanostructures on nitrogen-doped carbon obtained by high-temperature synthesis for use in PEMFC”, J. Appl. Electrochem. (2014) DOI 10.1007/s10800-014-0664-4.

  • J. Langner, J. Melke, H. Ehrenberg, C. Roth, „Determination of Overpotentials in All Vanadium Redox Flow Batteries”, ECS Transactions, Volume 58 (2014).

  • D. E. Ramaker, A. Korovina, V. Croze, J. Melke, C. Roth, “Following ORR intermediates adsorbed on a Pt cathode catalyst during break-in of a PEM fuel cell by in operando X-ray absorption spectroscopy”, Phys. Chem. Chem. Phys. 16 (27) (2014) 13645-13653.

  • K. Froelich, H. Rauner, F. Scheiba, C. Roth, H. Ehrenberg, „Welding of Nafion® - the influence of time, temperature and pressure”, J. Power Sources (2014) in print.

  • C. Roth, P. Bleith, C. A. Schwoebel, S. Kaserer, J. Eichler, „Importance of Fuel Cell Tests for Stability Assessment-Suitability of Titanium Diboride as an Alternative Support Material”, Energies 7 (6) (2014) 3642-3652.

2013

  • S. Kaserer, K. M. Caldwell, D. E. Ramaker, C. Roth, „Analyzing the Influence of H3PO4 as Catalyst Poison in High Temperature PEM Fuel Cells Using in-operando X-ray Absorption Spectroscopy”, J. Phys. Chem. C 117, 6210-6217, (2013)

  • F. Muench, M. Oezaslan, M. Rauber, S. Kaserer, A. Fuchs, E. Mankel, J. Brötz, P. Strasser, C. Roth, W. Ensinger, “Electroless Synthesis of Nanostructured Nickel and Nickel-Boron Tubes and their Performance as Unsupported Ethanol Electrooxidation Catalysts”, Journal of Power Sources 222(2013), 243 – 252.

  • S. Kaserer, C. Rakousky, J. Melke, C. Roth, “Design of a reference electrode for high-temperature PEM fuel cells” J. Appl. Electrochem. (2013) DOI: 10.1007/s10800-013-0567-9.

  • D. Dixon, J. Melke, M. Botros, J. Rathore, H. Ehrenberg, C. Roth, „Increase of catalyst utilization in polymer electrolyte membrane fuel cells by shape-selected Pt nanoparticles“, Int. Journal of Hydrogen Energy 38 (2013) 13393 – 13398.

2012

  • H. Nuss, C. Roth, Solid State Chemistry 2011, Nachrichten aus der Chemie 60 (3) (2012) 251-264.

  • J. Melke, A. Schoekel, D. Gerteisen, D. Dixon, F. Ettingshausen, C. Cremers, C. Roth, and D. E. Ramaker, “Electrooxidation of Ethanol on Pt. An in situ and time-resolved XANES study”, J. Phys. Chem. C 116 (4) (2012) 2838–2849.

  • A. Habereder, D. Dixon, M. Farmand, S. Kaserer, C. Roth, D. E. Ramaker, „Space resolved, in operando X-ray absorption spectroscopy: Investigations on both the anode and cathode in a direct methanol fuel cell“, J. Phys. Chem. C, 116 (13) (2012) 7587-7595.

  • A. Wolz, S. Zils, D. Ruch, N. Kotov, C. Roth, M. Michel, “Incorporation of Indium Tin Oxide Nanoparticles in PEMFC Electrodes”, Adv. Energy Mater. 2, 569-574, (2012) doi: 10.1002/aenm.201100711.

  • H. Butsch, C. Roth, D. Ritzinger, A. Helmboldt, G. Hoogers, A. Bock, "Spatially resolved contact pressure and contact resistance measurements at the gas diffusion layer - a novel tool for PEM fuel cell development", J. Electrochem. Soc. (2012) accepted.

2011

  • F. Ettingshausen, J. Kleemann, A. Marcu, G. Toth, H. Fuess, C. Roth, ’Dissolution and migration of platinum in PEMFCs investigated for start/stop cycling and high potential degradation’, Fuel Cells 11 (2011) 238-245.

  • F. Ettingshausen, J. Suffner, S. Kaserer, H. Hahn, C. Roth, ’Sb-doped SnO2 hollow spheres offering micro and nano porosity for the fuel cell electrode structure’, Advanced Energy Materials 1 (4) (2011) 648-654, DOI: 10.1002/aenm.201100077.

  • M. Soehn, S. Zils, N. Nicoloso, C. Roth, ’Effective debundling of CNTs and simultaneous synthesis of Pt nanoparticles by Nafion® induced emulsions’, J. Power Sources 196 (2011), 6079-6084.

  • D. Dixon, K. Wippermann, J. Mergel, A. Schoekel, S. Zils, C. Roth, ’Degradation effects at the methanol inlet, outlet and center region of a stack MEA operated in DMFC’, J. Power Sources 196 (2011) 5538-5545.

  • F. Muench, S. Kaserer, U. Kunz, I. Svoboda, S. Lauterbach, H.-J. Kleebe, C. Roth, W. Ensinger, ’Electroless synthesis of platinum and platinum-ruthenium nanotubes and their application in methanol oxidation’, J. Mater. Chem. 21 (2011) 6286-6291.

  • M. Rauber, I. Alber, S. Müller, R. Neumann, O. Picht, C. Roth, A. Schoekel, M. E. Toimil-Molares, W. Ensinger, “Highly-ordered supportless 3-D nanowire networks with tuneable complexity and interwire connectivity for device integration”, Nano Letters 11 (6) (2011) 2304-2310.

2010

  • V. Croze, F. Ettingshausen, J. Melke, M. Soehn, D. Stuermer, C. Roth, ’The use of in-situ X-ray absorption spectroscopy in applied fuel cell research’, J. Appl. Electrochem. 40 (2010) 877-883.

  • J. Melke, A. Schoekel, D. Dixon, C. Cremers, D. E. Ramaker, C. Roth, ’Ethanol oxidation on carbon-supported Pt, PtRu and PtSn catalysts studied by operando x-ray absorption spectroscopy’, J. Phys. Chem. C 114 (2010) 5914-5925.

  • J. Arras, E. Paki, C. Roth, J. Radnik, M. Lucas, P. Claus, ’How a supported metal is influenced by an ionic liquid: In-depth characterization of SCILL-type palladium catalysts and their hydrogen adsorption’, J. Phys. Chem. C 114 (2010), 10520-10526.

  • A. Wolz, S. Zils, M. Michel, C. Roth, ’Structured multilayered electrodes of proton/electron conducting polymer for Polymer Electrolyte Membrane Fuel Cells assembled by spray coating’, J. Power Sources 195 (2010) 8162-8167.

  • D. Dixon, A. Schröder, A. Schökel, M. Söhn, I. Manke, N. Kardjilov, T. Sanders, V. Loos, G. Hoogers, K. Wippermann, D. Stolten, C. Roth, ’Design of in-situ experimentation for the study of fuel cells with X-rays and neutrons’, MP Materials Testing 10 (2010) 725-735.

  • M. Michel, J. Bour, J. Petersen, C. Arnoult, F. Ettingshausen, C. Roth, D. Ruch, ’Atmospheric plasma deposition: A new pathway in the design of conducting polymer-based anodes for hydrogen fuel cells’, Fuel Cells 10 (2010) 932-937.

  • S. Zils, A. Wolz, M. Michel, C. Roth, ’Multilayer Designed ionomer-Free Electrodes for Polymer Electrolyte Membrane Fuel Cells’, Electrochem. Soc. Trans. 28 (2010) 33-42.

  • F. Scheiba, U. Kunz, H. Butsch, S. Zils, H. Fuess, C. Roth, ’Imaging of the GDL-electrode interface in PEMFC using Wood’s metal intrusion’, Electrochem. Soc. Trans. 28 (2010) 85-92.

  • G. Sevjidsuren, S. Zils, S. Kaserer, A. Wolz, F. Ettingshausen, D. Dixon, A. Schoekel, C. Roth, P. Altantsog, D. Sangaa, C. Ganzorig, ’Effect of different support morphology and Pt particle sizes in electrocatalysts for fuel cell applications’, Journal of Nanomaterials (2010) doi:10.1155/2010/852786.

  • S. Zils, M. Timpel, T. Arlt, A. Wolz, I. Manke, C. Roth, ’3D visualization of PEMFC electrode structures using FIB nanotomography’, Fuel Cells 10 (2010) 966-972.

2009

  • M. Carmo, T. Roepke, C. Roth, A. M. Dos Santos, J. G. Rocha Poco, M. Linardi, ’A novel electrocatalyst support with proton conductive properties for polymer electrolyte membrane fuel cell applications’, J. Power Sources 191 (2009) 330-337.

  • M. Carmo, T. Roepke, F. Scheiba, C. Roth, S. Moeller, H. Fuess, J. G. R. Poco, M. Linardi, ’The use of a dynamic hydrogen electrode as an electrochemical tool to evaluate plasma activated carbon as electrocatalyst support for direct methanol fuel cell’, Mat. Res. Bull. 44 (2009) 51-56.

  • F. Ettingshausen, J. Kleemann, M. Michel, M. Quintus, H. Fuess, C. Roth, ’ Spatially resolved degradation effects in membrane-electrode-assemblies of vehicle aged polymer electrolyte membrane fuel cell stacks’, J. Power Sources 194 (2009) 899-907.

  • F. Ettingshausen, A. Weidner, S. Zils, A. Wolz, J. Suffner, M. Michel, C. Roth, ’Alternative support materials for fuel cell catalysts’, ECS Transactions 25 (9) (2009) 1883-1892.

2008

  • C. Roth, N. Benker, R. Theissmann, R. J. Nichols, D. J. Schiffrin, ’Bifunctional electrocatalysis in Pt-Ru nanoparticle systems’, Langmuir 24 (2008) 2191-2199.

  • F. Scheiba, N. Benker, U. Kunz, C. Roth, H. Fuess, ’Electron microscopy techniques for the analysis of the polymer electrolyte distribution in proton exchange membrane fuel cells’, J. Power Sources 177 (2008) 273-280.

  • A. R. dos Santos, M. Carmo, A. Oliveira-Neto, E. V. Spinace, J. G. R. Poco, C. Roth, H. Fueß, M. Linardi, ’Electrochemical and impedance spectroscopy studies in H-2/O-2 and methanol/O-2 proton exchange membrane fuel cells’, Ionics 14 (2008) 43-51.

  • M. Michel, F. Ettingshausen, F. Scheiba, A. Wolz, C. Roth, ’Using layer-by-layer assembly of polyaniline fibers in the fast preparation of high performance fuel cell nanostructured membrane electrodes’, Phys. Chem. Chem. Phys. 10 (2008) 3796-3801.

  • M. Steffan, F. Klasovsky, J. Arras, C. Roth, J. Radnik, H. Hofmeister, P. Claus, ’Carbon-carbon double bond versus carbonyl group hydrogenation: Controlling the intramolecular selectivity with polyaniline-supported platinum catalysts’, Adv. Synth. Catal. 350 (2008) 1337-1348.

  • F. Klasovsky, J. Hohmeyer, A. Brückner, M. Bonifer, J. Arras, M. Steffan, M. Lucas, J. Radnik, C. Roth, P. Claus, ’Catalytic and mechanistic investigation of polyaniline supported PtO2 nanoparticles: A combined in situ / operando EPR, DRIFTS, and EXAFS study’, J. Phys. Chem. C 112 (49) (2008) 19555-19559.

2007

  • C. Roth, N. Benker, M. Mazurek, F. Scheiba, H. Fuess, ’Pt-Ru fuel cell catalysts subjected to H2, CO, N2 and air atmosphere: an X-ray absorption study’, Appl. Catalysis A 319 (2007) 81-90.

  • F. J. Scott, C. Roth, D. E. Ramaker, ’The kinetics of CO poisoning in simulated reformate and effect of Ru island morphology on PtRu fuel cell catalysts as determined by operando XANES’, J. Phys. Chem. C 111 (2007) 11403-11413.

  • C. Roth, N. Benker, S. Zils, R. Chenitz, A. Issanin, H. Fuess, ’Oxidation behaviour of ruthenium in the presence of platinum’, Z. Phys. Chem. 221 (2007) 1549-1567.

2006

  • M. Mazurek, N. Benker, C. Roth, Th. Buhrmester, H. Fuess, ‘Electrochemical Impedance and X-ray absorption spectroscopy (EXAFS) as in-situ methods to study the PEMFC anode’, Fuel Cells 6 (1) (2006) 16-20.

  • N. Benker, C. Roth, M. Mazurek, H. Fuess, ’Synthesis and characterisation of ternary Pt/Ru/Mo catalysts for the anode of the PEM fuel cell’, J. New Mat. Electrochem. Sys. 9, 2006, 121-126.

  • M. Mazurek, N. Benker, C. Roth, H. Fuess, ’Structural and electrochemical investigation of binary mixtures of carbon-supported Pt and Ru catalysts for PEM fuel cells’, Fuel Cells 6 (2006) 208-213.

  • F. Scheiba, M. Scholz, C. Lin, C. Roth, C. Cremers, X. Qiu, U. Stimming, H. Fuess, ’On the suitability of hydrous ruthenium oxide supports to enhance intrinisic proton conductivity in direct methanol anodes’, Fuel Cells 6 (2006) 439-446.

  • L. Cao, F. Scheiba, C. Roth, F. Schweiger, C. Cremers, U. Stimming, H. Fuess, L. Chen, W. Zhu, X. Qiu, ’Novel nano-composite Pt/RuO2•xH2O/CNT catalysts for DMFC’, Angew. Chem. Int. Ed. 45 (2006) 5315-5319.

2005

  • N. Martz, C. Roth, H. Fuess, ‘Characterisation of different Pt/metal/complex catalysts as anode catalysts for the PEM fuel cell’, J. Appl. Electrochem. 35 (1) (2005) 85-90.

  • C. Roth, A. J. Papworth, I. Hussain, R. J. Nichols, D. J. Schiffrin, ‘A Pt-Ru nanoparticulate model system to study the bifunctional mechanism of electrocatalysis’, J. Electroanal. Chem. 581 (1) (2005) 79-85.

  • C. Roth, N. Martz, M. Mazurek, F. Scheiba, H. Fuess, ‘Development of an in-situ cell for X-ray absorption measurements during fuel cell operation’, Adv. Eng. Mat. 7 (2005) 952-956.

  • C. Roth, N. Benker, Th. Buhrmester, M. Mazurek, M. Loster, H. Fuess, D. C. Koningsberger, D. E. Ramaker, ’Determination of O(H) and CO Coverage and Adsorption sites on PtRu electrodes in an Operating PEM Fuel Cell’, J. Am. Chem. Soc. 127 (42) (2005) 14607-14615.

2004

  • C. Roth, N. Martz, H. Fuess, ‘An X-ray diffraction and transmission electron microscopy study of Pt-Ru fuel cell catalysts before and after operation’, J. Appl. Electrochem. 34 (3) (2004) 345-348.

  • C. Roth, N. Martz, H. Fuess, ‘Challenges in the structural characterization of nanodispersed catalytic materials’, J. New Mat. Electrochem. Sys. 7 (2) (2004) 117-123.

  • C. Roth, N. Martz, A. Morlang, R. Theissmann, H. Fuess, ‘X-ray absorption studies on alloy formation in different carbon-supported Pt-Ru electrocatalysts’, Phys. Chem. Chem. Phys. 6 (13) (2004) 3557-3562.

  • C. Roth, I. Hussain, M. Bayati, R. J. Nichols, D. J. Schiffrin, ‘Fullerene-linked Pt nanoparticle assemblies’, Chem. Comm. 13 (2004) 1532-1533.

2003

  • E. G. Franco, E. Arico, M. Linardi, C. Roth, N. Martz, H. Fuess, ‘Synthesis and characterization of electrocatalyst powders for application in PEM fuel cells’, Materials Science Forum 416-418 (2003) 4-10.

2002

  • C. Roth, N. Martz, F. Hahn, J.-M. Leger, C. Lamy, H. Fuess, ‘Characterization of differently-synthesized Pt-Ru fuel cell catalysts by cyclic voltammetry, FTIR spectroscopy and in single cells‘, J. Electrochem. Soc. 149 (11) (2002) E433-E439.

  • C. Roth, N. Martz, Th. Buhrmester, H. Fuess, ‘In-situ XAFS fuel cell measurements of a carbon-supported Pt-Ru anode electrocatalyst in hydrogen and direct methanol operation’, Phys. Chem. Chem. Phys. 4 (2002) 3555-3557.

2001

  • C. Roth, N. Martz, H. Fuess, ‘Characterization of different Pt-Ru catalysts by X-ray diffraction and transmission electron microscopy’, Phys. Chem. Chem. Phys. 3 (2001) 315-319.

  • C. Roth, M. Goetz, H. Fuess, ‘Synthesis and characterization of carbon-supported Pt-Ru-WOx catalysts by spectroscopy and diffraction methods’, J. Electrochem. Soc. 31 (2001) 793-798.

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