TY - JOUR A1 - Muntean, Roxana A1 - Pascal, Dragos-Toader A1 - Rost, Ulrich A1 - Marginean, Gabriela A1 - Brodmann, Michael A1 - Vaszilcsin, Nicolae T1 - Synthesis and characterisation of platinum–cobalt–manganese ternary alloy catalysts supported on carbon nanofibers: An alternative catalyst for hydrogen evolution reaction JF - International Journal of Hydrogen Energy N2 - 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. KW - PtCoMn KW - Ternary alloy catalyst preparation KW - PEM water electrolysis KW - Hydrogen evolution reaction Y1 - 2020 U6 - https://doi.org/10.1016/j.ijhydene.2020.02.041 SN - 0360-3199 ER - TY - CHAP A1 - Böhm, Leonard A1 - Kazamer, Norbert A1 - Holtkotte, Lisa A1 - Näther, Johannes A1 - Rost, Ulrich A1 - Underberg, Martin A1 - Marginean, Gabriela A1 - Hülser, Tim A1 - Brodmann, Michael A1 - Köster, Frank T1 - Pulsed electrodeposition of iridium catalyst nanoparticles on titanium suboxide supports for application in PEM electrolysis T2 - Konferenz: "8th International Conference on Advanced Materials and Structures - AMS 2020", 7.-9. Oktober 2020 in Timișoara (Rumänien) Y1 - 2020 ER - TY - JOUR A1 - Muntean, Roxana A1 - Pascal, Dragos-Toader A1 - Rost, Ulrich A1 - Marginean, Gabriela A1 - Brodmann, Michael A1 - Vaszilcsin, Nicolae T1 - Synthesis and characterisation of platinum–cobalt–manganese ternary alloy catalysts supported on carbon nanofibers: An alternative catalyst for hydrogen evolution reaction JF - International Journal of Hydrogen Energy Y1 - 2020 U6 - https://doi.org/10.1016/j.ijhydene.2020.02.041 VL - 45 IS - 49 SP - 26217 EP - 26225 ER - TY - JOUR A1 - Wirkert, Florian Josef A1 - Roth, Jeffrey A1 - Jagalski, Stefan A1 - Neuhaus, Philipp A1 - Rost, Ulrich A1 - Brodmann, Michael T1 - A modular design approach for PEM electrolyser systems with homogeneous operation conditions and highly efficient heat management JF - International Journal of Hydrogen Energy Y1 - 2020 U6 - https://doi.org/10.1016/j.ijhydene.2019.03.185 SN - 0360-3199 VL - 45 IS - 2 SP - 1226 EP - 1235 ER - TY - JOUR A1 - Wirkert, Florian Josef A1 - Roth, Jeffrey A1 - Jagalski, Stefan A1 - Neuhaus, Philipp A1 - Rost, Ulrich A1 - Brodmann, Michael T1 - A modular design approach for PEM electrolyser systems with homogeneous operation conditions and highly efficient heat management JF - International Journal of Hydrogen Energy Y1 - 2020 U6 - https://doi.org/10.1016/j.ijhydene.2019.03.185 SN - 0360-3199 VL - 45 IS - 2 SP - 1226 EP - 1235 ER -