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Ioannis Katsounaros
Researcher at Forschungszentrum Jülich
Publications - 78
Citations - 7165
Ioannis Katsounaros is an academic researcher from Forschungszentrum Jülich. The author has contributed to research in topics: Catalysis & Platinum. The author has an hindex of 32, co-authored 72 publications receiving 5415 citations. Previous affiliations of Ioannis Katsounaros include Aristotle University of Thessaloniki & Max Planck Society.
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Oxygen electrochemistry as a cornerstone for sustainable energy conversion
TL;DR: A promising strategy to develop such an understanding is the investigation of the impact of material properties on reaction activity/selectivity and on catalyst stability under the conditions of operation, as well as the application of complementary in situ techniques for the Investigation of catalyst structure and composition.
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Degradation Mechanisms of Pt/C Fuel Cell Catalysts under Simulated Start–Stop Conditions
Josef C. Meier,Carolina Galeano,Ioannis Katsounaros,Angel Angelov Topalov,Aleksander Kostka,Ferdi Schüth,Karl Johann Jakob Mayrhofer +6 more
TL;DR: In this article, the degradation of a Pt/Vulcan fuel cell catalyst under simulated start-stop conditions in an electrochemical half-cell was investigated using identical location transmission electron microscopy (IL-TEM).
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The particle size effect on the oxygen reduction reaction activity of Pt catalysts: influence of electrolyte and relation to single crystal models
Markus Nesselberger,Sean Ashton,Josef C. Meier,Ioannis Katsounaros,Karl Johann Jakob Mayrhofer,Matthias Arenz +5 more
TL;DR: It is highlighted that the difference in SA between the individual HSA carbon supported catalysts (1 to 5 nm) is rather trivial and that the main challenge is to understand the significant differences inSA between the polycrystalline Pt, unsupported Pt particles, and HSAcarbon supported Pt catalysts.
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Design criteria for stable Pt/C fuel cell catalysts
Josef C. Meier,Carolina Galeano,Ioannis Katsounaros,Jonathon Witte,Hans Bongard,Angel Angelov Topalov,Claudio Baldizzone,Stefano Mezzavilla,Ferdi Schüth,Karl Johann Jakob Mayrhofer +9 more
TL;DR: The effects of particle size, inter-particle distance, certain support characteristics and thermal treatment on the catalyst performance and in particular the catalyst stability are evaluated and a set of design criteria for more stable and active Pt/C and Pt-alloy/C materials is suggested.
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Dissolution of Noble Metals during Oxygen Evolution in Acidic Media
Serhiy Cherevko,Aleksandar R. Zeradjanin,Angel Angelov Topalov,Nadiia Kulyk,Ioannis Katsounaros,Karl Johann Jakob Mayrhofer +5 more
TL;DR: In this paper, a comparative study on the activity and stability of oxidized polycrystalline noble metals during the oxygen evolution reaction (OER) is presented, where all studied metals exhibit transient and steady-state dissolution.