@inproceedings{MunteanPascalRostetal.2018, author = {Muntean, Roxana and Pascal, Dragos-Toader and Rost, Ulrich and Podleschny, Pit Yannick and Marginean, Gabriela and Schumacher, Marc}, title = {Studies on pulse electrodeposition of Pt-Ni binary alloy for electrochemical cell applications, 7th International Symposium on Advanced Materials and Structures}, series = {Konferenz: 7th International Conference on Advanced Materials and Structures (AMS 2018), 28.-31. M{\"a}rz 2018 in Timisoara (Rum{\"a}nien)}, booktitle = {Konferenz: 7th International Conference on Advanced Materials and Structures (AMS 2018), 28.-31. M{\"a}rz 2018 in Timisoara (Rum{\"a}nien)}, year = {2018}, language = {en} } @article{MunteanRostPascaletal.2016, author = {Muntean, Roxana and Rost, Ulrich and Pascal, Dragos-Toader and Marginean, Gabriela and Vaszilcsin, Nicolae}, title = {Determination of the Electrochemical Surface Area for CNF-Pt Electrocatalyst Using Cyclic Voltammetry}, series = {Chemical Bulletin of "Politehnica" University of Timisoara, Romania}, volume = {61 (75)}, journal = {Chemical Bulletin of "Politehnica" University of Timisoara, Romania}, number = {2}, pages = {44 -- 48}, year = {2016}, abstract = {Carbon Nanofibers (CNF) are considered to be a promising catalyst support material due to their unique characteristics, excellent mechanical, electrical and structural properties, high surface area and nevertheless, good interaction with metallic catalyst particles. The possibility of preparing CNF decorated with platinum by an electrochemical method was tested, using a hexachloroplatinic bath solution. The experiments were carried out with the aid of a Potentiostat/Galvanostat Ivium Technologies Vertex, in a three - electrode cell. The aim of the present work was to determine the electrochemical surface area (ECSA) of the CNF-Pt catalysts in relation to the functionalization treatment of fibers, using an electrochemical method. ECSA for different functionalized CNF-Pt catalysts was determined by cyclic voltammetry in 0.5 M H2SO4 solution. The highest active surface of platinum was obtained for the samples with CNF functionalized by plasma treatment using 80 W for 1800 s. The obtained results correlate very well with the particles size and distribution of platinum, revealed by scanning electron microscopy (SEM) and the quantity of deposited platinum determined by thermo gravimetrical analysis (TGA) respectively. Cyclic voltammetry (CV) has been proven to be a suitable method for estimation of the ECSA of the electrocatalysts.}, language = {en} } @article{MunteanPascalRostetal.2019, author = {Muntean, Roxana and Pascal, Dragos-Toader and Rost, Ulrich and Holtkotte, Lisa and N{\"a}ther, Johannes and K{\"o}ster, Frank and Underberg, Martin and H{\"u}lser, Tim and Brodmann, Michael}, title = {Investigation of Iridium Nanoparticles Supported on Sub-stoichiometric Titanium Oxides as Anodic Electrocatalysts in PEM Electrolysis. Part I.: Synthesis and Characterization}, series = {Topics in Catalysis}, volume = {62}, journal = {Topics in Catalysis}, number = {5-6}, issn = {1022-5528}, doi = {10.1007/s11244-019-01164-3}, pages = {429 -- 438}, year = {2019}, language = {en} } @article{MunteanPascalRostetal.2019, author = {Muntean, Roxana and Pascal, Dragos-Toader and Rost, Ulrich and Holtkotte, Lisa and N{\"a}ther, Johannes and K{\"o}ster, Frank and Underberg, Martin and H{\"u}lser, Tim and Brodmann, Michael}, title = {Investigation of Iridium Nanoparticles Supported on Sub-stoichiometric Titanium Oxides as Anodic Electrocatalysts in PEM Electrolysis. Part I.: Synthesis and Characterization}, series = {Topics in Catalysis}, volume = {62}, journal = {Topics in Catalysis}, number = {5/6}, issn = {1022-5528}, doi = {10.1007/s11244-019-01164-3}, pages = {429 -- 438}, year = {2019}, language = {en} } @article{RostPodleschnySchumacheretal.2018, author = {Rost, Ulrich and Podleschny, Pit Yannick and Schumacher, Marc and Muntean, Roxana and Pascal, Dragos-Toader and Mutascu, Cristian and Koziolek, J. and Marginean, Gabriela and Brodmann, Michael}, title = {Long-term Stable Electrodes Based on Platinum Electrocatalysts Supported on Titanium Sintered Felt for the Use in PEM Fuel Cells}, series = {IOP conference series. Materials science and engineering}, journal = {IOP conference series. Materials science and engineering}, number = {416}, issn = {1757-8981}, doi = {10.1088/1757-899X/416/1/012013}, pages = {012013}, year = {2018}, language = {en} } @article{MunteanPascalRostetal.2020, author = {Muntean, Roxana and Pascal, Dragos-Toader and Rost, Ulrich and Marginean, Gabriela and Brodmann, Michael and Vaszilcsin, Nicolae}, title = {Synthesis and characterisation of platinum-cobalt-manganese ternary alloy catalysts supported on carbon nanofibers: An alternative catalyst for hydrogen evolution reaction}, series = {International Journal of Hydrogen Energy}, journal = {International Journal of Hydrogen Energy}, issn = {0360-3199}, doi = {10.1016/j.ijhydene.2020.02.041}, pages = {9}, year = {2020}, abstract = {A systematic method for obtaining a novel electrode structure based on PtCoMn ternary alloy catalyst supported on graphitic carbon nanofibers (CNF) for hydrogen evolution reaction (HER) in acidic media is proposed. Ternary alloy nanoparticles (Co0.6Mn0.4 Pt), with a mean crystallite diameter under 10 nm, were electrodeposited onto a graphitic support material using a two-step pulsed deposition technique. Initially, a surface functionalisation of the carbon nanofibers is performed with the aid of oxygen plasma. Subsequently, a short galvanostatic pulse electrodeposition technique is applied. It has been demonstrated that, if pulsing current is employed, compositionally controlled PtCoMn catalysts can be achieved. Variations of metal concentration ratios in the electrolyte and main deposition parameters, such as current density and pulse shape, led to electrodes with relevant catalytic activity towards HER. The samples were further characterised using several physico-chemical methods to reveal their morphology, structure, chemical and electrochemical properties. X-ray diffraction confirms the PtCoMn alloy formation on the graphitic support and energy dispersive X-ray spectroscopy highlights the presence of the three metallic components from the alloy structure. The preliminary tests regarding the electrocatalytic activity of the developed electrodes display promising results compared to commercial Pt/C catalysts. The PtCoMn/CNF electrode exhibits a decrease in hydrogen evolution overpotential of about 250 mV at 40 mA cm-2 in acidic solution (0.5 M H2SO4) when compared to similar platinum based electrodes (Pt/CNF) and a Tafel slope of around 120 mV dec-1, indicating that HER takes place under the Volmer-Heyrovsky mechanism.}, language = {en} } @inproceedings{RostPodleschnySchumacheretal.2018, author = {Rost, Ulrich and Podleschny, Pit Yannick and Schumacher, Marc and Muntean, Roxana and Pascal, Dragos-Toader and Mutascu, Cristian and Koziolek, J. and Marginean, Gabriela and Brodmann, Michael}, title = {Long-term Stable Electrodes Based on Platinum Electrocatalysts Supported on Titanium Sintered Felt for the Use in PEM Fuel Cells}, series = {Konferenz: 7th International Conference on Advanced Materials and Structures (AMS 2018), 28.-31. M{\"a}rz 2018 in Timisoara (Rum{\"a}nien)}, booktitle = {Konferenz: 7th International Conference on Advanced Materials and Structures (AMS 2018), 28.-31. M{\"a}rz 2018 in Timisoara (Rum{\"a}nien)}, year = {2018}, language = {en} } @article{MunteanPascalRostetal.2020, author = {Muntean, Roxana and Pascal, Dragos-Toader and Rost, Ulrich and Marginean, Gabriela and Brodmann, Michael and Vaszilcsin, Nicolae}, title = {Synthesis and characterisation of platinum-cobalt-manganese ternary alloy catalysts supported on carbon nanofibers: An alternative catalyst for hydrogen evolution reaction}, series = {International Journal of Hydrogen Energy}, volume = {45}, journal = {International Journal of Hydrogen Energy}, number = {49}, doi = {10.1016/j.ijhydene.2020.02.041}, pages = {26217 -- 26225}, year = {2020}, language = {en} } @inproceedings{MunteanPascalRostetal.2019, author = {Muntean, Roxana and Pascal, Dragos-Toader and Rost, Ulrich and Marginean, Gabriela and Vaszilcsin, Nicolae and Brodmann, Michael}, title = {PtCoMn ternary alloy supported catalysts for hydrogen evolution reaction}, series = {Konferenz: 10th International Conference on Hydrogen Production, 15.-17. Mai 2019 in Cluj-Napoca, Rum{\"a}nien}, booktitle = {Konferenz: 10th International Conference on Hydrogen Production, 15.-17. Mai 2019 in Cluj-Napoca, Rum{\"a}nien}, year = {2019}, language = {en} } @article{RostMunteanPascaletal.2018, author = {Rost, Ulrich and Muntean, Roxana and Pascal, Dragos-Toader and Podleschny, Pit Yannick and Schumacher, Marc and Marginean, Gabriela}, title = {Studies on Pulse Electrodeposition of Pt-Ni binary Alloy For Electrochemical Cell Applications}, series = {IOP conference series. Materials science and engineering}, journal = {IOP conference series. Materials science and engineering}, number = {416}, issn = {1757-8981}, doi = {10.1088/1757-899X/416/1/012004}, pages = {012004}, year = {2018}, language = {en} }