Konrad Ehelebe

PhD Student

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k.ehelebe@fz-juelich.de

tel: +49 9131 85-27432




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Currently elecrocatalyst evaluation for fuel cells is mainly conducted in either aqueous model systems (such as RDE, SFC) or single cell experiments (MEA) which both show severe metholodical limitations. On the one hand side, in aqueous model systems only idealized catalyst structures can be assessed and catalyst activity cannot be measured in relevant potential ranges due to systematic mass-transport limitations. On the other side, in MEA research effects from both electrodes can not be deconvoluted and experiments are time- and resource-intensive. Therefore, intermediary testing methods need to be introduced, which can combine the advantages of both approaches. Half-cell measurements using gas diffusion electrodes (GDE) are considered to be the most suitable method to close the gap between fundamental and applied electrocatalyst evaluation allowing high mass transport catalyst screening in relevant potential ranges and realistic electrode structures.

My research is focussed on developing novel GDE test setups for catalyst activity as well as stability investigations and the evaluation of promising catalyst materials. Thereby the main focus is put on fuel cell reactions (esp. oxygen reduction reaction) with low Pt or non-precious metal catalysts.

 



2016-2017 Diploma thesis at Fraunhofer IFAM Dresden (Development of electrochemical flow-reactor for CO2 reduction to formate)
2014 Research stay at Universidad Nacional de Colombia (Pyrolysis of organic waste materials)
2010-2017 Process Engineering at TU Dresden


2018 Electrochemistry 2018 - Metrohm Poster Award
2020 ISE online 2020 - Poster Award