T
Tzonka Mineva
Researcher at Centre national de la recherche scientifique
Publications - 109
Citations - 4663
Tzonka Mineva is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: Density functional theory & Catalysis. The author has an hindex of 24, co-authored 103 publications receiving 3515 citations. Previous affiliations of Tzonka Mineva include University of Calgary & University of Montpellier.
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Journal ArticleDOI
Identification of catalytic sites for oxygen reduction in iron- and nitrogen-doped graphene materials.
Andrea Zitolo,Vincent Goellner,Vanessa Armel,Moulay Tahar Sougrati,Tzonka Mineva,Lorenzo Stievano,Emiliano Fonda,Frédéric Jaouen +7 more
TL;DR: Fe-N-C materials quasi-free of crystallographic iron structures after argon or ammonia pyrolysis are synthesized, demonstrating that the turnover frequency of Fe-centred moieties depends on the physico-chemical properties of the support.
Journal ArticleDOI
Identification of catalytic sites in cobalt-nitrogen-carbon materials for the oxygen reduction reaction
Andrea Zitolo,Nastaran Ranjbar-Sahraie,Tzonka Mineva,Jingkun Li,Qingying Jia,Serban N. Stamatin,George F. Harrington,George F. Harrington,Stephen Mathew Lyth,Stephen Mathew Lyth,Petr Krtil,Sanjeev Mukerjee,Emiliano Fonda,Frédéric Jaouen +13 more
TL;DR: It is concluded that cobalt-based moieties bind O2 too weakly for efficient O2 reduction, and nitrogen-doped carbon materials with atomically dispersed iron or cobalt are promising for catalytic use.
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Identification of Durable and Non-Durable FeNx Sites in Fe-N-C Materials for Proton Exchange Membrane Fuel Cells
Jingkun Li,Moulay Tahar Sougrati,Andrea Zitolo,James M. Ablett,Ismail Can Oğuz,Tzonka Mineva,Ivana Matanovic,Plamen Atanassov,Ying Huang,Iryna V. Zenyuk,Andrea Di Cicco,Kavita Kumar,Laetitia Dubau,Frédéric Maillard,Goran Dražić,Frédéric Jaouen +15 more
TL;DR: In this paper, it was shown that Fe-N-C catalysts initially comprising two distinct FeNx sites (S1 and S2) degrade via the transformation of S1 into iron oxides while the structure and number of S2 were unmodified.
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P-block single-metal-site tin/nitrogen-doped carbon fuel cell cathode catalyst for oxygen reduction reaction
Fang Luo,Aaron Roy,Luca Silvioli,David A. Cullen,Andrea Zitolo,Moulay Tahar Sougrati,Ismail Can Oğuz,Tzonka Mineva,Detre Teschner,Stephan Wagner,Ju Wen,Fabio Dionigi,Ulrike I. Kramm,Jan Rossmeisl,Frédéric Jaouen,Peter Strasser +15 more
TL;DR: The superior proton-exchange membrane fuel cell performance of SnNC cathode catalysts under realistic, hydrogen–air fuel cell conditions, particularly after NH3 activation treatment, makes them a promising alternative to today’s state-of-the-art Fe-based catalysts.
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Understanding Active Sites in Pyrolyzed Fe–N–CCatalysts for Fuel Cell Cathodes by Bridging Density Functional TheoryCalculations and 57 Fe Mössbauer Spectroscopy
Tzonka Mineva,Ivana Matanovic,Ivana Matanovic,Plamen Atanassov,Plamen Atanassov,Moulay Tahar Sougrati,Lorenzo Stievano,Martin Clémancey,Amélie Kochem,Jean-Marc Latour,Frédéric Jaouen +10 more
TL;DR: In this paper, the detailed structure, oxidation, and spin states of pyrolyzed Fe-N-C materials are investigated for proton-exchange membrane fuel cell cathodes.