• News

    • New projects in NBMC

      30.05.2022

      Further projects financed by the National Science Center will be implemented at the NanoBioMedical Center.

    • START scholarships

      30.05.2022

      We are happy to announce that Dr. Jagoda Litowczenko-Cybulska has been awarded the START Scholarship 2022 of the Foundation for Polish Science (FNP) for the best young researchers in Poland. Additionally, we congratulate our employee, Dr. Eng. Artur Jędrzak, who received the START scholarship as part of a project submitted from the Poznań University of Technology.

    • Prof. Stefan Jurga has died

      17.03.2022

      We regret to inform you, that on March 15, 2022, Prof. Stefan Jurga has died. Rector of the Adam Mickiewicz University in Poznań in 1996 - 2002 and undersecretary, and secretary of state, in the Ministry of Education and Science as well as in Ministry of Science and Higher Education, in 2005-2007.

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Highlighted Publications

Advanced Materials Interfaces, 2021, doi.org/10.1002/admi.202002172
Z. Miłosz, D. Wilgocka‐Ślęzak, E. Madej, N. Spiridis, S. Jurga, F. Stobiecki, M. Lewandowski

Graphene Blocks Oxidative Segregation of Iron Dissolved in Platinum: A Model Study

Iron–platinum (Fe–Pt) compounds are well known for their interesting magnetic and electrocatalytic properties. However, iron segregation and iron oxides formation under oxidative conditions may influence the characteristics of Fe–Pt systems. Several approaches are used to protect the Fe–Pt compounds from oxidation, the most promising of which involves covering the material with a protective graphitic layer. By performing model‐type ultrahigh vacuum (UHV) studies, it is shown that a layer of epitaxial graphene (Gr) grown on a [111]‐oriented single‐crystal platinum substrate with thermally dissolved iron (Fe–Pt(111) surface alloy) effectively blocks iron segregation and iron oxides formation under oxidative conditions, while still allowing for the adsorption of oxygen atoms underneath the carbon layer. The oxidation is monitored in real time and at the micrometer scale using low energy electron microscopy (LEEM) and local diffraction (μLEED). Notably, a similar result is obtained for a poorly ordered Gr‐like carbon layer grown directly on a Fe–Pt(111) substrate. The findings are rationalized in terms of a locally lowered partial oxygen pressure and inhibited iron oxide growth in a confined space between the carbon layer and the metal support.
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