News

Julius' new paper was published in Nature Communications!

13 April 2021



Our new paper On the limitation in assessing the stability of oxygen evolution catalysts using aqueous model electrochemical cells was published today in Nature Communications. In this work, we tackle the discrepancy in the lifetimes of oxygen evolution reaction (OER) electrocatalysts between aqueous model systems (AMS), which are commonly employed in fundamental research and polymer electrolyte membrane based membrane electrode assemblies (MEA), which are state of the art in today's water electrolyzers.

With a newly developed setup, we present the first measurement of real dissolution rate in an MEA system. A striking difference in the stability of an iridium oxide catalyst in the MEA system was observed compared to our established scanning flow cell coupled to an inductively coupled plasma mass spectrometer (SFC-ICP-MS). Thus, a series of measurements in AMS was performed to search for the origins of this discrepancy.

Our results indicate two main contributors being responsible for the dissolution discrepancy—first, a general overestimation of the acidity of the conditions in the MEA. Second, iridium oxide stabilizes in the MEA system on longer timescales.

We expect our findings to lead to a better understanding of OER catalyst degradation and, subsequently, to better performing water electrolyzers.

More details can be found in Nature Communications under the following link: https://doi.org/10.1038/s41467-021-22296-9.



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Pamella Rodrigues joined us as our new visiting researcher!


8 February 2024



Welcome, Pamella!


Our latest study on backing electrode degradation during OER is now published in ACS Catalysis!


1 December 2023



Congratulations, Matej!


Congratulations to Pascal and Ken for receiving a DAAD scholarship to do a research exchange in the US!


28 November 2023



Well done, Pascal and Ken!


Joanna Przybysz joined us as a Master student!


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The Best Poster Award won by Tuani Carla Gentil in the 34th Topical Meeting of the ISE


23 March 2023



Great job, Tuani!


Lucía Morales joined our group as a new Master student!


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Ken has been selected for the HIDA Trainee Network!


17 February 2023



Congratulations, Ken!


Konrad successfully defended his PhD thesis


16 December 2022



Congratulations, Dr. Konrad Ehelebe!


Carolin Igel joined our group as a new Master student!


21 October 2022



Welcome, Carolin!


Visiting researcher Dr. Kavita Kumar also joined our group!


13 September 2022



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Our visiting researcher Dr. Dyovani Coelho just joined us!


12 September 2022



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Kamyar Parsi joined us as a new master student!


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Yunsheng Qiu joined our team as a PhD student!


23 August 2022



Welcome, Yunsheng!


Daniel and Konrad will attend the upcoming Lindau Nobel Laureate meeting!


6 May 2022



Congratulations, Daniel and Konrad!


Daniel and Ken got an ECS Travel Grant Award!


6 May 2022



Congratulations, Daniel and Ken!


Alexandre Nozadze joined our group as a bachelor student!


1 April 2022



Welcome, Alexandre!


Our ACS Energy Letters paper is a highly read article!


3 March 2022



Congratulations, Konrad!


Tuani Carla Gentil joined us as a guest researcher!


1 March 2022



Welcome, Tuani!


New Article out in ACS Energy Letters: Benchmarking Fuel Cell Electrocatalysts Using Gas Diffusion Electrodes: Inter-lab Comparison and Best Practices


24 January 2022



Nice work, Konrad!


Successful defenses of our master's students!


24 December 2021



Congratulations, Elisabeth, Marvin, and Nico!