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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Marvin Gornik joined our group as a master student!


12 May 2021



Welcome, Marvin!


Elisabeth Frömsdorf joined us as a new master student in our OER sub-team!


1 May 2021



Welcome, Elisabeth!


Gün Deniz Akkoç joined us as a guest researcher!


21 April 2021



Welcome, Deniz!


Nico Röttcher will join us in April 2021 as a new master student!


22 March 2021



Welcome, Nico!


Moritz Geuß joined our team as a PhD student!


22 March 2021



Welcome, Moritz!


Dr. Victoria Benavente Llorente will be awarded a Georg Forster Research Fellowship and join us!


17 March 2021



Welcome, Victoria!


Our collaborative paper on Pt(111) and Pt(100) was highlighted in "ESRF Highlights 2020"!


10 March 2021



The highlight can be found here - http://www.esrf.eu/Apache_files/Highlights/2020/index.html#/page/138


Jakob Scholl is joining our group as a master student!


19 January 2021



Welcome, Jakob!


Valentín Briega Martos joins our group as a PostDoc!


15 January 2021



Welcome, Valentín!


New paper online: Pt dissolution in realistic fuel cell catalyst layers


15 January 2021




Pascal Kaiser's master work is awarded with a prize from Evonik Operations GmbH!


21 December 2020



We congratulate Pascal with this achievement and wish him more awards and prizes for his upcoming works in our group!


An invited talk at Frumkin readings 2020!


30 November 2020



Serhiy gave an invited talk at the Frumking readings 2020.


A 2020 HOT PCCP article!


5 November 2020



Our collaborative paper is selected as a 2020 HOT PCCP article and made free to be accessed until 31.01.2021.


Maja Milosevic is also joining our group as a PhD student!


5 November 2020



Welcome, Maja!


Mária Minichová is joining our group as a PhD student!


2 October 2020



Welcome, Mária!


Pascal Kaiser is joining us as a PhD student!


2 October 2020



Welcome, Pascal!


Florian Speck wins a poster prize at the Electrochemistry undercover from GDCh!


24 September 2020



More details can be found at Chemistry of Materials: https://pubs.acs.org/doi/abs/10.1021/acs.chemmater.0c02048


Konrad Ehelebe wins a poster prize at the 71st Annual ISE Meeting Belgrade Online!


8 September 2020



More details can be found online - https://www.ise-online.org/


Dr. Cherevko's newly released opinions on a new recycling approach in ChemistryWorld


1 September 2020



More details can be found online - https://www.chemistryworld.com/news/noble-metals-dissolved-without-aqua-regia/4012369.article