TY - JOUR AU - Kovács, Nikoletta AU - Maász, Gábor AU - Galambos, Ildikó AU - Gerencsérné Berta, Renáta AU - Mihály, Judith AU - Csákiné Tombácz, Etelka TI - Glyphosate/AMPA adsorption on magnetite under different conditions: The effect of pH and electrolytes JF - JOURNAL OF MOLECULAR LIQUIDS J2 - J MOL LIQ VL - 393 PY - 2024 PG - 9 SN - 0167-7322 DO - 10.1016/j.molliq.2023.123674 UR - https://m2.mtmt.hu/api/publication/34410273 ID - 34410273 N1 - Soós Ernő Research and Development Center, University of Pannonia, H-8800 Nagykanizsa, Zrínyi u. 18., Hungary Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Research Network (HUN-REN), H-1117 Budapest, Magyar Tudósok körútja 2, Hungary Department of Chemistry, Eszterházy Károly Catholic University, H-3300 Eger, Leányka u. 6, Hungary Export Date: 18 February 2024 CODEN: JMLID Correspondence Address: Maász, G.; Soós Ernő Research and Development Center, H-8800 Nagykanizsa, Zrínyi u. 18., Hungary; email: maasz.gabor@pen.uni-pannon.hu Funding details: RRF-2.3.1-21-2022-00014 Funding details: Magyar Tudományos Akadémia, MTA, BO/000549/20/7, ÚNKP-22-5 Funding text 1: This research was supported by the National Multidisciplinary Laboratory for Climate Change (grant number RRF-2.3.1-21-2022-00014). GM was supported by the Bolyai Fellowship of the Hungarian Academy of Sciences (grant number BO/000549/20/7) and the (grant number ÚNKP-22-5) New National Excellence Program of The Ministry for Culture and Innovation from The Source of The National Research, Development and Innovation Fund. LA - English DB - MTMT ER - TY - JOUR AU - Ayyubov, Ilgar AU - Borbáth, Irina AU - Pászti, Zoltán AU - Sebestyén, Zoltán AU - Mihály, Judith AU - Szabó, Tamás AU - Nyergesné Illés, Erzsébet AU - Domján, Attila AU - Florea, Mihaela AU - Radu, Dana AU - Kuncser, Andrei AU - Tompos, András AU - Tálas, Emília TI - Synthesis and Characterization of Graphite Oxide Derived TiO2-Carbon Composites as Potential Electrocatalyst Supports JF - TOPICS IN CATALYSIS J2 - TOP CATAL PY - 2024 SN - 1022-5528 DO - 10.1007/s11244-021-01513-1 UR - https://m2.mtmt.hu/api/publication/32327556 ID - 32327556 N1 - Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Eötvös Loránd Research Network (ELKH), Magyar Tudósok körútja 2, Budapest, 1117, Hungary Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, Szeged, 6720, Hungary Department of Food Engineering, Faculty of Engineering, University of Szeged, Mars tér 7, Szeged, 6724, Hungary Research Centre for Natural Sciences, Centre for Structural Science, Eötvös Loránd Research Network (ELKH), Magyar Tudósok Körútja 2, Budapest, 1117, Hungary National Institute of Materials Physics, 405A Atomistilor Street, Magurele, 077125, Romania Cited By :1 Export Date: 12 February 2024 Correspondence Address: Tálas, E.; Research Centre for Natural Sciences, Magyar Tudósok körútja 2, Hungary; email: talas.emilia@ttk.hu Correspondence Address: Florea, M.; National Institute of Materials Physics, 405A Atomistilor Street, Romania; email: mihaela.florea@chimie.unibuc.ro Funding details: NET-2018, NNE 131270 Funding details: European Commission, EC Funding details: Magyar Tudományos Akadémia, MTA Funding details: European Regional Development Fund, ERDF, NNE130004 Funding text 1: The research within project No. VEKOP-2.3.2-16-2017-00013 was supported by the European Union and the State of Hungary, co-financed by the European Regional Development Fund. Project No. NNE130004 has been implemented with the support provided from the National Research, Development and Innovation Fund of Hungary, financed under the TR-NN-17 funding scheme. Project No. NNE 131270 has been implemented with the support provided from the National Research, Development and Innovation Fund of Hungary financed under the M-ERA.NET-2018 funding scheme. The financial supports by the János Bolyai Research Scholarship of the Hungarian Academy of Sciences are gratefully acknowledged (Erzsébet Illés). The authors also thank Dr. Ágnes Szegedi and Dr. Szilvia Klébert for the nitrogen physisorption measurements, and Dr. Zoltán May for the ICP-OES measurements. AB - TiO2-C (carbon) hybrid materials are promising electrocatalyst supports because the presence of TiO2 results in enhanced stability. Use of new types of carbonaceous materials such as reduced graphene oxide instead of traditional active carbon provides certain benefits. Although the rutile polymorph of TiO2 seems to have the most beneficial properties in these hybrid materials, the anatase type is more frequent in TiO2-rGO composites, especially in graphite oxide (GO) derived ones, as GO has several properties which may interfere with rutile formation. To explore and evaluate these peculiarities and their influence on the composite formation, we compared TiO2-C systems formulated with GO and Black Pearls (BP) carbon. Various physicochemical methods, such as attenuated total reflection infrared (ATR-IR)-, solid state NMR-, Raman- and X-ray photoelectron spectroscopy, X-ray powder diffraction (XRD), electron microscopy, etc. were used to characterize the samples from the different stages of our multistep sol–gel synthesis. Our experiments demonstrated that utilization of GO is indeed feasible for composite preparation, although its sodium contamination has to be removed during the synthesis. On the other hand, high temperature treatment and/or solvothermal treatment during composite synthesis resulted in decomposition of the functional groups of the GO and the functional properties of the final product were similar in case of both composites. However, Pt/TiO2-GO derived sample showed higher oxygen reduction reaction activity than Pt/TiO2-BP derived one. Based on the decrease of electrochemical surface area, the stability order was the following: Pt/C (commercial) < Pt/TiO2-BP derived C < Pt/TiO2-GO derived C. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature. LA - English DB - MTMT ER - TY - JOUR AU - Szöllősi, Dávid AU - Hajdrik, Polett AU - Tordai, Hedvig AU - Horváth, Ildikó AU - Veres, Dániel AU - Gillich, Bernadett AU - Shailaja, Kanni Das AU - Smeller, László AU - Bergmann, Ralf Konrad AU - Bachmann, Michael AU - Mihály, Judith AU - Gaál, Anikó AU - Jezsó, Bálint AU - Barátki, Balázs Lajos AU - Kövesdi, Dorottya AU - Bősze, Szilvia AU - Szabó, Ildikó AU - Felföldi, Tamás AU - Oszwald, Erzsébet AU - Padmanabhan, Parasuraman AU - Gulyás, Balázs Zoltán AU - Hamdani, Nazha AU - Máthé, Domokos AU - Varga, Zoltán AU - Szigeti, Krisztián TI - Molecular imaging of bacterial outer membrane vesicles based on bacterial surface display JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 13 PY - 2023 IS - 1 PG - 14 SN - 2045-2322 DO - 10.1038/s41598-023-45628-9 UR - https://m2.mtmt.hu/api/publication/34267696 ID - 34267696 N1 - Department of Biophysics and Radiation Biology, Semmelweis University, 37-47 Tűzoltó Street, Budapest, 1094, Hungary Institute for Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 400 Bautzner Landstraße, Dresden, 01328, Germany Biological Nanochemistry Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, 2 Magyar Tudósok Körútja, Budapest, 1117, Hungary Doctoral School of Biology and Institute of Biology, Eötvös Loránd University, 1/C Pázmány Péter Sétány, Budapest, 1117, Hungary Department of Immunology, ELTE Eötvös Loránd University, 1/C Pázmány Péter Sétány, Budapest, 1117, Hungary MTA-ELTE Complement Research Group, Eötvös Loránd Research Network (ELKH), 1/A Pázmány Péter Sétány, Budapest, 1117, Hungary ELKH-ELTE Research Group of Peptide Chemistry, Eötvös L. Research Network, Eötvös L. University, 1/A Pázmány Péter Sétány, Budapest, 1117, Hungary Department of Microbiology, ELTE Eötvös Loránd University, 1/C Pázmány Péter Sétány, Budapest, 1117, Hungary Centre for Ecological Research, Institute of Aquatic Ecology, 29 Karolina Road, Budapest, 1113, Hungary Department of Anatomy, Histology, and Embryology, Semmelweis University, 58 Tűzoltó Street, Budapest, 1094, Hungary Lee Kong Chian School of Medicine, Nanyang Technological University, 11 Mandalay Road, Singapore, 30823, Singapore Cognitive Neuroimaging Centre, Nanyang Technological University, 59 Nanyang Drive, Singapore, 636921, Singapore Department of Cellular and Translational Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, 44801, Germany HCEMM-Cardiovascular Research Group, Department of Pharmacology and Pharmacotherapy, University of Budapest, Budapest, 1089, Hungary CROmed Translational Research Centers, 37-47 Tűzoltó Street, Budapest, 1094, Hungary In Vivo Imaging Advanced Core Facility, Hungarian Center of Excellence for Molecular Medicine (HCEMM), 37-47 Tűzoltó Street, Budapest, 1094, Hungary Export Date: 30 January 2024 Correspondence Address: Szigeti, K.; Department of Biophysics and Radiation Biology, 37-47 Tűzoltó Street, Hungary; email: krisztian.szigeti@gmail.com Funding details: Horizon 2020 Framework Programme, H2020, 739593 Funding details: European Commission, EC, 859890 Funding details: Magyar Tudományos Akadémia, MTA Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFI, 2020.1.16-Jövő-2021–00013, 2020–1.1.2-PIACI-KFI-2020–00021, TKP2021-EGA-31 Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA, EFOP-1.8.0-VEKOP-17-2017-00001 Funding details: Innovációs és Technológiai Minisztérium Funding text 1: The authors thank Miklós Geiszt for his contributions to the in vivo experiments, Mihály Kálmán and Ferenc Kilin for their help with the TEM measurements, Wouter Jong and Bart van den Berg van Saparoea for the pHbpD(Δd1) plasmid. Funding text 2: Open access funding provided by Semmelweis University. Zoltán Varga was supported by the János Bolyai Research Scholarship of the Hungarian Academy of Sciences, the ÚNKP-21-5 Bolyai + New National Excellence Program of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund. Ildikó Szabó and Szilvia Bősze thank for the support of grant EFOP-1.8.0-VEKOP-17-2017-00001 and for the ELTE Thematic Excellence Programme the 2018-1.2.1-NKP-2018-00005 project (under the 2018-1.2.1-NKP funding scheme) provided by the Hungarian Ministry for Innovation and Technology, Hungary. Kanni Das Shailaja received support from the European Union under project H2020-SmartAge grant Nr. 859890. This work was supported by The European Union’s Horizon 2020 Research And Innovation Program, grant agreement No 739593: HCEMM, supported by EU Programme: H2020-EU.4.a. This work was also partly funded by grants from the Hungarian National Research, Development and Innovation Office (Thematic Excellence Program, TKP-BIOImaging, financed under the 2020–4.1.1-TKP2020 funding scheme, Investment to the Future 2020.1.16-Jövő-2021–00013, TKP2021-EGA-31 and 2020–1.1.2-PIACI-KFI-2020–00021). AB - The important roles of bacterial outer membrane vesicles (OMVs) in various diseases and their emergence as a promising platform for vaccine development and targeted drug delivery necessitates the development of imaging techniques suitable for quantifying their biodistribution with high precision. To address this requirement, we aimed to develop an OMV specific radiolabeling technique for positron emission tomography (PET). A novel bacterial strain ( E. coli BL21(DE3) ΔnlpI, ΔlpxM ) was created for efficient OMV production, and OMVs were characterized using various methods. SpyCatcher was anchored to the OMV outer membrane using autotransporter-based surface display systems. Synthetic SpyTag-NODAGA conjugates were tested for OMV surface binding and 64 Cu labeling efficiency. The final labeling protocol shows a radiochemical purity of 100% with a ~ 29% radiolabeling efficiency and excellent serum stability. The in vivo biodistribution of OMVs labeled with 64 Cu was determined in mice using PET/MRI imaging which revealed that the biodistribution of radiolabeled OMVs in mice is characteristic of previously reported data with the highest organ uptakes corresponding to the liver and spleen 3, 6, and 12 h following intravenous administration. This novel method can serve as a basis for a general OMV radiolabeling scheme and could be used in vaccine- and drug-carrier development based on bioengineered OMVs. LA - English DB - MTMT ER - TY - CONF AU - Beke-Somfai, Tamás AU - Szigyártó, Imola Csilla AU - Varga, Zoltán AU - Mihály, Judith AU - Singh, Priyanka AU - Ricci, Maria AU - Gaál, Anikó AU - Quemé Peña, Mayra AU - Kitka, Diána AU - Fülöp, L AU - Drahos, L TI - New Perspectives in the removal of protein Corona: host define peptides as useful tools in EV surface engineering T2 - ISEV2023 Abstract Book PY - 2023 PG - 1 UR - https://m2.mtmt.hu/api/publication/34207881 ID - 34207881 LA - English DB - MTMT ER - TY - JOUR AU - Várhelyi, Csaba, ifj. AU - Szőke, Á. AU - Sziráki, Laura AU - Tomoaia-Cotișel, M. AU - Homonnay, Zoltán AU - Szalay, Roland AU - Simon-Várhelyi, M. AU - Mereu, R.-A. AU - Pokol, György AU - Szilágyi, Imre Miklós AU - Papp, J. AU - Mihály, Judith AU - Kuzmann, Ernő TI - Fe spin states and redox processes in Schiff base type complexes JF - JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY J2 - J RADIOANAL NUCL CHEM VL - 332 PY - 2023 IS - 10 SP - 4125 EP - 4139 PG - 15 SN - 0236-5731 DO - 10.1007/s10967-023-09095-w UR - https://m2.mtmt.hu/api/publication/34107401 ID - 34107401 N1 - Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Arany János 11, Cluj-Napoca, 400028, Romania Institute of Chemistry, Eötvös Loránd University, Pázmány Péter 1/a, Budapest, 1117, Hungary Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem Rkp. 3, Budapest, 1111, Hungary Faculty of Biology and Geology, Babeş-Bolyai University, Gheorghe Bilaşcu 44, Cluj-Napoca, 400015, Romania Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, Budapest, 1117, Hungary Export Date: 29 January 2024 CODEN: JRNCD Correspondence Address: Várhelyi, C.; Faculty of Chemistry and Chemical Engineering, Arany János 11, Romania; email: csaba.varhelyi@ubbcluj.ro LA - English DB - MTMT ER - TY - JOUR AU - Bak, Mónika AU - Mihály, Judith AU - Gyulai, Gergő AU - Szalai, István AU - Varga, Imre AU - Mészáros, Róbert TI - Structuring liquids through solvent-assisted interfacial association of oppositely charged polyelectrolytes and amphiphiles JF - JOURNAL OF COLLOID AND INTERFACE SCIENCE J2 - J COLLOID INTERF SCI VL - 650 PY - 2023 SP - 1097 EP - 1104 PG - 8 SN - 0021-9797 DO - 10.1016/j.jcis.2023.07.040 UR - https://m2.mtmt.hu/api/publication/34061243 ID - 34061243 N1 - Laboratory of Interfaces and Nanosized Systems, Institute of Chemistry, Eötvös Loránd University, H-1117 Budapest, Pázmány Péter sétány 1/A, Hungary Biological Nanochemistry Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, 1117 Budapest, Magyar tudósok körútja 2, Hungary Department of Chemistry, J. Selye University, Komárno, 945 01, Slovakia Export Date: 13 October 2023 CODEN: JCISA Correspondence Address: Mészáros, R.; Laboratory of Interfaces and Nanosized Systems, H-1117 Budapest, Pázmány Péter sétány 1/A, Hungary; email: rmeszaros@caesar.elte.hu LA - English DB - MTMT ER - TY - JOUR AU - Szabó, Tamás AU - Bakos, István AU - Csupor, Barbara AU - Jeerapan, Itthipon AU - Pekker, Péter AU - Mihály, Judith AU - Németh, Krisztina AU - Wang, Joseph AU - Keresztes, Zsófia TI - Dual-Role Peptide with Capping and Cleavage Site Motifs in Nanoparticle-Based One-Pot Colorimetric and Electrochemical Protease Assay JF - ACS OMEGA J2 - ACS OMEGA VL - 8 PY - 2023 SP - 22556 EP - 22566 PG - 11 SN - 2470-1343 DO - 10.1021/acsomega.3c00771 UR - https://m2.mtmt.hu/api/publication/34008641 ID - 34008641 N1 - Research Centre for Natural Sciences, Magyar tudósok körútja 2., Budapest, 1117, Hungary Laboratory of Nano-Bioelectronics, Department of Nanoengineering, Jacobs School of Engineering, University of California, La Jolla, San Diego, CA 92093, United States Division of Physical Science and Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, 90110, Thailand Nanolab, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Egyetem u. 10., Veszprém, 8200, Hungary Export Date: 30 January 2024 Correspondence Address: Szabó, T.; Research Centre for Natural Sciences, Magyar tudósok körútja 2., Hungary; email: szabo.84.tamas@ttk.hu Funding details: GINOP-2.3.3-15-2016-0009 Funding details: Jacobs School of Engineering, University of California, San Diego, JSOE, 92093 Funding details: European Commission, EC Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH, K131594 Funding details: Magyarország Kormánya Funding text 1: This work was supported by the European Commission under FORMILK 690898/H2020-MSCA-RISE-2015 project, and T.S. is grateful for the secondment period in the Laboratory of Nano-Bioelectronics, Department of Nanoengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, 92093, USA. The BIONANO GINOP-2.3.2-15-2016-00017 project and the Nanolab of University of Pannonia, Hungary, established under GINOP-2.3.3-15-2016-0009 project were co-financed by European Structural and Investments Funds and the Hungarian Government. The FT-IR spectroscopy part was funded by National Research Development and Innovation Office, under grant number K131594. The authors gratefully acknowledge the essential help of Mihály Pósfai, head of Nanolab of University of Pannonia, Hungary, for providing access and expertise on TEM-related work. and Table of Contents were created with BioRender.com. Funding text 2: This work was supported by the European Commission under FORMILK 690898/H2020-MSCA-RISE-2015 project, and T.S. is grateful for the secondment period in the Laboratory of Nano-Bioelectronics, Department of Nanoengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, 92093, USA. The BIONANO GINOP-2.3.2-15-2016-00017 project and the Nanolab of University of Pannonia, Hungary, established under GINOP-2.3.3-15-2016-0009 project were co-financed by European Structural and Investments Funds and the Hungarian Government. The FT-IR spectroscopy part was funded by National Research Development and Innovation Office, under grant number K131594. The authors gratefully acknowledge the essential help of Mihály Pósfai, head of Nanolab of University of Pannonia, Hungary, for providing access and expertise on TEM-related work. Scheme 1 and Table of Contents were created with BioRender.com. LA - English DB - MTMT ER - TY - JOUR AU - Fehér, Béla AU - Szakáll, Sándor AU - Ende, M. AU - Effenberger, H.S. AU - Mihály, Judith AU - Sajó, István AU - Kótai, László AU - Szabó, D. TI - Three ammonium-iron-sulfite phases from a burning dump of the Vasas abandoned opencast coal mine (Pécs, Mecsek Mountains, Hungary) and the new mineral kollerite JF - MINERALOGY AND PETROLOGY J2 - MINER PETROL VL - 117 PY - 2023 IS - 2 SP - 231 EP - 245 PG - 15 SN - 0930-0708 DO - 10.1007/s00710-023-00818-1 UR - https://m2.mtmt.hu/api/publication/33834200 ID - 33834200 N1 - Department of Mineralogy, Herman Ottó Museum, Kossuth utca 13, Miskolc, 3525, Hungary Institute of Mineralogy and Geology, University of Miskolc, A/3 Building, Miskolc-Egyetemváros, 3515, Hungary Institut für Mineralogie und Kristallographie, Universität Wien, Josef-Holaubek-Platz 2, Vienna, 1090, Austria Research Centre for Natural Sciences, Magyar tudósok körútja 2, Budapest, 1117, Hungary Szentágothai Research Centre, University of Pécs, Ifjúság utja 6, Pécs, 7624, Hungary Department of Mineralogy, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary Export Date: 19 May 2023; Cited By: 0; Correspondence Address: H.S. Effenberger; Institut für Mineralogie und Kristallographie, Universität Wien, Vienna, Josef-Holaubek-Platz 2, 1090, Austria; email: herta.silvia.effenberger@univie.ac.at LA - English DB - MTMT ER - TY - JOUR AU - Bóta, Attila AU - Fehér, Bence AU - Wacha, András Ferenc AU - Juhász, Tünde AU - Szabó, Dániel AU - Turiák, Lilla AU - Gaál, Anikó AU - Varga, Zoltán AU - Amenitsch, Heinz AU - Mihály, Judith TI - Lipid nanoparticles with erythrocyte cell-membrane proteins JF - JOURNAL OF MOLECULAR LIQUIDS J2 - J MOL LIQ VL - 369 PY - 2023 PG - 10 SN - 0167-7322 DO - 10.1016/j.molliq.2022.120791 UR - https://m2.mtmt.hu/api/publication/33298558 ID - 33298558 N1 - CODEN: JMLID LA - English DB - MTMT ER - TY - JOUR AU - Ayyubov, Ilgar AU - Tálas, Emília AU - Berghian-Grosan, Camelia AU - Románszki, Loránd AU - Borbáth, Irina AU - Pászti, Zoltán AU - Szegedi, Ágnes AU - Mihály, Judith AU - Vulcu, Adriana AU - Tompos, András TI - Nitrogen doped carbonaceous materials as platinum free cathode electrocatalysts for oxygen reduction reaction (ORR) JF - REACTION KINETICS MECHANISMS AND CATALYSIS J2 - REACT KINET MECH CATAL VL - 136 PY - 2023 IS - 1 SP - 125 EP - 147 PG - 23 SN - 1878-5190 DO - 10.1007/s11144-022-02331-6 UR - https://m2.mtmt.hu/api/publication/33297776 ID - 33297776 N1 - Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Eötvös Loránd Research Network (ELKH), Magyar Tudósok Körútja 2, Budapest, 1117, Hungary Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Budapest, Hungary National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca, Romania Research Centre for Natural Sciences, P.O. Box 286, Budapest, 1519, Hungary Cited By :3 Export Date: 9 February 2024 Correspondence Address: Tálas, E.; Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, Hungary; email: talas.emilia@ttk.hu Funding details: European Commission, EC Funding text 1: This research was funded by Project No. RRF-2.3.1-21-2022-00009, titled National Laboratory for Renewable Energy has been implemented with the support provided by the Recovery and Resilience Facility of the European Union within the framework of Programme Széchenyi Plan Plus. Authors thank to Dr. Tamás Szabó (University of Szeged) for providing graphite oxide. AB - Comparison of physicochemical properties and electrocatalytic behavior of different N-doped carbonaceous materials as potential catalysts for oxygen reduction reaction (ORR) was attended. Ball-milling of graphite with melamine and solvothermal treatment of graphite oxide, graphene nanoplatelets (GNP) with ammonia were used as preparation methods. Elemental analysis and N 2 physisorption measurements revealed the synthesis of N-doped materials with strongly different morphological parameters. Contact angle measurements proved that all three samples had good wettability properties. According to analysis of XRD data and Raman spectra a higher nitrogen concentration corresponded to a smaller size of crystallites of the N-doped carbonaceous material. Surface total N content determined by XPS and bulk N content assessed by elemental analysis were close, indicating homogenous inclusion of N in all samples. Rotating disc electrode tests showed that these N-doped materials weremuch less active in acidic medium than in an alkaline environment. Although the presence of in-plane N species is regarded to be advantageous for the ORR activity, no particular correlation was found in these systems with any type of N species. According to Koutecky–Levich analysis, both the N-containing carbonaceous materials and the reference Pt/C catalyst displayed a typical one-step, four-electron ORR route. Both ball-milled sample with high N-content but with low SSA and solvothermally synthesized N-GNP with high SSA but low N content showed significant ORR activity. It could be concluded that beside the total N content other parameters such as SSA, pore structure, structural defects, wettability were also essential for achieving high ORR activity. LA - English DB - MTMT ER -