A5061163652- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Solar-Powered Water Purification Methods
- Supercapacitor Materials and Fabrication
- Gas Sensing Nanomaterials and Sensors
- Advancements in Solid Oxide Fuel Cells
- Electrochemical Analysis and Applications
- Hydrogen Storage and Materials
- Advanced Battery Technologies Research
- Catalytic Processes in Materials Science
- Electrochemical sensors and biosensors
- Chemical Looping and Thermochemical Processes
- Hybrid Renewable Energy Systems
- Global Education and Multiculturalism
- Ethics in medical practice
- Educator Training and Historical Pedagogy
- Advanced Materials Characterization Techniques
- Advanced Memory and Neural Computing
- Cardiac Arrest and Resuscitation
- Conducting polymers and applications
- Linguistic Education and Pedagogy
- Vehicle emissions and performance
- Catalysis and Hydrodesulfurization Studies
- Musculoskeletal pain and rehabilitation
Graz University of Technology
2013-2018
University of Vienna
2015
Rechargeable zinc-air flow batteries are investigated as possible technology for fast responding large-scale electrical energy storage due to the use of inexpensive, non-toxic and abundant materials, compact system design. The operating ranges several parameters such rate (2–8 cm s−1), concentration electrolyte (6 or 8 M KOH), charge/discharge current densities (up 100 mA cm−2 mean), active passive air supply well their influence on performance stability electrodes compared. Bi-catalyzed...
A membrane-free direct borohydride fuel cell that is operated with a containing electrolyte designed and constructed. Main focus of this study the cathode catalyst has to show high tolerance against borohydride. Both catalysts, Ag-Mn3O4/C as commercial Pt/C anode catalyst, are characterized electrochemically using rotating disk electrode. The number exchanged electrons calculated employing Levich Koutecky-Levich analysis. Cathodes fabricated cross rolling method an in-house made gas...
Abstract Rechargeable zinc‐air flow batteries are investigated as promising stationary energy storage system due to compact design and low cost materials. Bifunctional air electrodes employing a La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 perovskite catalyst for 2 ‐reduction ‐evolution manufactured in small scale (4 cm ) up‐scaled sizes (50–55 tested unit cell configuration with flowing electrolyte. Stable operation of 1000 h is achieved the set‐up an overall 1800 over 700 cycles at high voltage...
Bifunctional air electrodes for the application in zinc-air flow batteries were manufactured a scalable manufacturing process using precious metal-free oxide catalysts. During repeated charge/discharge cycling at 50 mA cm-2 and with synthetic supply stable performances over more than 450 h 200 cycles achieved. The energy efficiency was 49% start 45% after cycles. In addition, pulse charging method 150 pulses successfully applied on electrodes.
This paper describes electrocatalysts for the oxygen reduction reaction (ORR) in alkaline direct ethanol fuel cells (ADEFCs), using non-noble metal electrocatalyst Ag/C, MnO2/C and AgMnO2/C. These showed tolerance toward media therefore resistance to crossover ADEFCs. Transmission electron microscopy, X-ray spectroscopy (EDX), cyclic voltammetry, rotating disk electrode (RDE) were employed determine morphology, composition, electrochemical activity of catalysts. The herein presented results...
The stationary use of high-temperature polymer electrolyte fuel cells allows the efficient decentralized production electricity and heat at customer site. In order to reduce cost such devices, platinum-cobalt based catalysts were synthesized directly surface gas diffusion electrodes with a lower overall precious metal loading than comparable, commercially available state-of-the-art without impairing cell performance. prepared membrane-electrode-assemblies showed high durability in single stack tests.
This case report deals with the unsatisfying pain management of a 44 year old patient cardiac arrest and subsequent cardiopulmonary resuscitation. The has (1) reduced consciousness, (2) is isolated due to an infection multi-resistant germs, (3) tracheotomy (4) contractures muscles in fingers hands. During nursing care he shows facial expressions body postures that indicate which insufficiently addressed.The was processed according model reflexive by Johns (1995) interpreted theoretical...
High manufacturing costs of active layers polymer electrolyte fuel cells (PEMFCs) are a major challenge for this promising technology to penetrate the market. In report new, straightforward and easily scalable process platinum cobalt cocatalysts is described demonstrated on lab-scale. The stability issue kind materials counteracted by post-preparation treatments, which also designed in order be feasible big scale. All catalysts characterized means cyclic voltammetry acidic as well alkaline...
The structure and electrochemical activity of carbon supported Pt-free cathode catalysts (Ag/C, Mn3O4/C AgMnO2/C) are investigated by means transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), diffraction (XRD) cyclic voltammetry (CV). display ethanol-tolerance for the oxygen reduction reaction (ORR) in 0.1 M KOH electrolyte containing ethanol at different temperatures. Because crossover from anode to through membrane can occur alkaline direct fuel cells...
Because conventional platinum based electrocatalysts in HTPEM fuel cells do not catalyse the oxygen reduction reaction (ORR) sufficiently fast, large amounts of scarce and expansive noble metal is used. Due to impact on overall system costs, loading has be reduced roadway towards commercialization cell systems. Corrosive operating conditions require high stability all compounds that are used within electrodes. many materials fulfil requirements, increasing activity by alloying with...