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 - Ayyubov, Ilgar AU - Vulcu, Adriana AU - Berghian-Grosan, Camelia AU - Tálas, Emília AU - Borbáth, Irina AU - Sajó, István AU - Sáfrán, György AU - Mihály, Judith AU - Tompos, András TI - Preparation of Pt electrocatalyst supported by novel, Ti(1−x)MoxO2-C type of composites containing multi-layer graphene JF - REACTION KINETICS MECHANISMS AND CATALYSIS J2 - REACT KINET MECH CATAL VL - 135 PY - 2022 IS - 1 SP - 49 EP - 69 PG - 21 SN - 1878-5190 DO - 10.1007/s11144-021-02138-x UR - https://m2.mtmt.hu/api/publication/32550046 ID - 32550046 AB - Ball milling is a relative simple and promising technique for preparation of inorganic oxide–carbon type of composites. Novel TiO2-C and Ti0.8Mo2O2-C type of composites containing multi-layer graphene were prepared by ball milling of graphite in order to get electrocatalyst supports for polymer electrolyte membrane fuel cells. Starting rutile TiO2 was obtained from P25 by heat treatment. Carbon-free Ti0.8Mo2O2 mixed oxide, prepared using our previously developed multistep sol–gel method, does not meet the requirements for materials of electrocatalyst support, therefore parent composites with Ti0.8Mo2O2/C = 75/25, 90/10 and 95/5 mass ratio were prepared using Black Pearls 2000. XRD study of parent composites proved that the oxide part existed in rutile phase which is prerequisite of the incorporation of oxophilic metals providing CO tolerance for the electrocatalyst. Ball milling of TiO2 or parent composites with graphite resulted in catalyst supports with enhanced carbon content and with appropriate specific surface areas. XRD and Raman spectroscopic measurements indicated the changes of graphite during the ball milling procedure while the oxide part remained intact. TEM images proved that platinum existed in the form of highly dispersed nanoparticles on the surface of both the Mo-free and of Mo-containing electrocatalyst. Electrocatalytic performance of the catalysts loaded with 20 wt% Pt was studied by cyclic voltammetry, COads-stripping voltammetry done before and after the 500-cycle stability test, as well as by the long-term stability test involving 10,000 polarization cycles. Enhanced CO tolerance and slightly lower stability comparing to Pt/TiO2-C was demonstrated for Pt/Ti0.8Mo2O2-C catalysts. LA - English DB - MTMT ER - TY - JOUR AU - Maria Cristina, Silva Cisneros AU - Borbáth, Irina AU - Zelenka, K AU - Sajó, István AU - Sáfrán, György AU - Tompos, András AU - Pászti, Zoltán TI - Effect of the reductive treatment on the state and electrocatalytic behavior of Pt in catalysts supported on Ti0.8Mo0.2O2-C composite JF - REACTION KINETICS MECHANISMS AND CATALYSIS J2 - REACT KINET MECH CATAL VL - 135 PY - 2022 IS - 1 SP - 29 EP - 47 PG - 19 SN - 1878-5190 DO - 10.1007/s11144-021-02131-4 UR - https://m2.mtmt.hu/api/publication/32545585 ID - 32545585 LA - English DB - MTMT ER - TY - JOUR AU - Krebsz, M AU - Kótai, László AU - Sajó, István AU - Váczi, Tamás AU - Pasinszki, T TI - Carbon Microsphere-Supported Metallic Nickel Nanoparticles as Novel Heterogeneous Catalysts and Their Application for the Reduction of Nitrophenol JF - MOLECULES J2 - MOLECULES VL - 26 PY - 2021 IS - 18 PG - 9 SN - 1420-3049 DO - 10.3390/molecules26185680 UR - https://m2.mtmt.hu/api/publication/32336647 ID - 32336647 LA - English DB - MTMT ER - TY - JOUR AU - Alexandre Fogaca, Lara AU - Kováts, Éva AU - Németh, Gergely AU - Kamarás, Katalin AU - Béres, Kende Attila AU - Németh, Péter AU - Petruševski, V. AU - Nagyné Bereczki, Laura AU - Holló, B.B. AU - Sajó, István AU - Klébert, Szilvia AU - Farkas, Attila AU - Szilágyi, Imre Miklós AU - Kótai, László TI - Solid-Phase Quasi-Intramolecular Redox Reaction of [Ag(NH3)2]MnO4: An Easy Way to Prepare Pure AgMnO2 JF - INORGANIC CHEMISTRY J2 - INORG CHEM VL - 60 PY - 2021 IS - 6 SP - 3749 EP - 3760 PG - 12 SN - 0020-1669 DO - 10.1021/acs.inorgchem.0c03498 UR - https://m2.mtmt.hu/api/publication/32102019 ID - 32102019 N1 - Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Müegyetem rakpart 3, Budapest, H-1111, Hungary Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok krt 2, Budapest, H-1117, Hungary Wigner Research Centre for Physics (RCP), Institute for Solid State Physics and Optics, Konkoly Thege u. 29-33, Budapest, H-1121, Hungary Department of Earth and Environmental Sciences, University of Pannonia, Egyetem út 10, Veszprém, H-8200, Hungary Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University, Skopje, 1000, North Macedonia Chemical Crystallography Research Laboratory, Research Centre for Natural Sciences, University of Novi Sad, Novi Sad, 21000, Serbia Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, 21000, Serbia János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, Pécs, H-7624, Hungary Department of Organic Chemistry, Budapest University of Technology and Economics, Budapest, H-1111, Hungary Deuton-X Ltd., Selmeci u2. 89, érd, H-2030, Hungary Cited By :12 Export Date: 11 April 2023 CODEN: INOCA Correspondence Address: Kótai, L.; Institute of Materials and Environmental Chemistry, Magyar Tudósok krt 2, Hungary; email: kotai.laszlo@ttk.hu LA - English DB - MTMT ER - TY - JOUR AU - Béres, Kende Attila AU - Sajó, István AU - Lendvay, György AU - Trif, László AU - Petruševski, VM. AU - Barta-Holló, B AU - Korecz, László AU - Paiva Franguelli, Fernanda AU - Nagyné László, Krisztina AU - Szilágyi, Imre Miklós AU - Kótai, László TI - Solid-Phase “Self-Hydrolysis” of [Zn(NH3)4MoO4@2H2O] Involving Enclathrated Water—An Easy Route to a Layered Basic Ammonium Zinc Molybdate Coordination Polymer JF - MOLECULES J2 - MOLECULES VL - 26 PY - 2021 IS - 13 PG - 19 SN - 1420-3049 DO - 10.3390/molecules26134022 UR - https://m2.mtmt.hu/api/publication/32089016 ID - 32089016 LA - English DB - MTMT ER - TY - JOUR AU - Alexandre Fogaca, Lara AU - Nagyné Bereczki, Laura AU - Petruševski, VM. AU - Barta-Holló, B AU - Paiva Franguelli, Fernanda AU - Mohai, Miklós AU - Béres, Kende Attila AU - Sajó, István AU - Szilágyi, Imre Miklós AU - Kótai, László TI - A Quasi-Intramolecular Solid-Phase Redox Reaction of Ammonia Ligands and Perchlorate Anion in Diamminesilver(I) Perchlorate JF - INORGANICS J2 - INORGANICS VL - 9 PY - 2021 IS - 5 PG - 19 SN - 2304-6740 DO - 10.3390/inorganics9050038 UR - https://m2.mtmt.hu/api/publication/32008901 ID - 32008901 N1 - Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Magyar Tudósok krt 2, Budapest, H-1117, Hungary Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Muegyetem rakpart 3, Budapest, H-1111, Hungary Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University, Skopje, 1000, North Macedonia Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovi´ca 3, Novi Sad, 21000, Serbia Szentagothai Research Centre, Environmental Analytical and Geoanalytical Research Group, University of Pécs, Ifjúság útja 20, Pécs, H-7624, Hungary Deuton-X Ltd, Selmeci u. 89, Érd, H-2030, Hungary Cited By :10 Export Date: 11 April 2023 Correspondence Address: Kotai, L.; Research Centre for Natural Sciences, Magyar Tudósok krt 2, Hungary; email: kotai.laszlo@ttk.hu LA - English DB - MTMT ER - TY - JOUR AU - Borbáth, Irina AU - Tálas, Emília AU - Pászti, Zoltán AU - Zelenka, K AU - Ayyubov, Ilgar AU - Salmanzade, K AU - Sajó, István AU - Sáfrán, György AU - Tompos, András TI - Investigation of Ti-Mo mixed oxide-carbon composite supported Pt electrocatalysts: Effect of the type of carbonaceous materials JF - APPLIED CATALYSIS A-GENERAL J2 - APPL CATAL A-GEN VL - 620 PY - 2021 PG - 17 SN - 0926-860X DO - 10.1016/j.apcata.2021.118155 UR - https://m2.mtmt.hu/api/publication/31993635 ID - 31993635 LA - English DB - MTMT ER - TY - JOUR AU - Lendvay, György AU - Majzik, Eszter AU - Nagyné Bereczki, Laura AU - Domján, Attila AU - Trif, László AU - Sajó, István AU - Paiva Franguelli, Fernanda AU - Farkas, Attila AU - Klébert, Szilvia AU - Bombicz, Petra AU - Németh, Csaba AU - Szilágyi, Imre Miklós AU - Kótai, László TI - (Me 2 NH 2 ) 10 [H 2 -Dodecatungstate] polymorphs: dodecatungstate cages embedded in a variable dimethylammonium cation + water of crystallization matrix JF - RSC ADVANCES J2 - RSC ADV VL - 11 PY - 2021 IS - 6 SP - 3713 EP - 3724 PG - 12 SN - 2046-2069 DO - 10.1039/d0ra09997j UR - https://m2.mtmt.hu/api/publication/31819362 ID - 31819362 N1 - Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Budapest, H-1117, Hungary University of Technology and Economics, Department of Inorganic and Analytical Chemistry, Budapest, H-1111, Hungary University of Pécs, János Szentágothai Research Centre, Pécs, H-7624, Hungary University of Technology and Economics, Department of Organic Chemistry, Budapest, H-1111, Hungary Deuton-X Ltd., Selmeci u. 89, Érd, H-2030, Hungary Export Date: 11 March 2021 CODEN: RSCAC Correspondence Address: Kótai, L.; Institute of Materials and Environmental Chemistry, Hungary; email: kotai.laszlo@ttk.mta.hu Correspondence Address: Kótai, L.; Deuton-X Ltd., Selmeci u. 89, Hungary; email: kotai.laszlo@ttk.mta.hu Funding details: K-115762, K-124544 Funding details: BME IE-NAT TKP2020 Funding details: European Commission, EC Funding details: Magyar Tudományos Akadémia, MTA, ÚNKP-18-4-BME-238 Funding details: European Regional Development Fund, FEDER Funding text 1: The research within projects No. VEKOP-2.3.2-16-2017-00013 and GINOP-2.2.1-15-2017-00084 was supported by the European Union and the State of Hungary, co-nanced by the European Regional Development Fund. N. V. M. and P. B. are grateful for grants by the Hungarian Scientic Research Found (K-124544 and K-115762). The K-124212 and an NRDI TNN_16 123631 grants are also acknowledged. I. M. S. thanks the Hungarian Academy of Sciences for a János Bolyai Research Fellowship and acknowledges the ÚNKP-18-4-BME-238 grant supported by the New National Excellence Program of the Ministry of Human Capacities, Hungary. An NRDI K 124212 and an NRDI TNN_16 123631 grants are acknowledged. The research reported in this paper was supported by the BME Nanotechnology and Materials Science TKP2020 IE grant of NKFIH Hungary (BME IE-NAT TKP2020). Funding Agency and Grant Number: European UnionEuropean Commission [GINOP-2.2.1-15-2017-00084, VEKOP-2.3.2-16-2017-00013]; State of Hungary; European Regional Development FundEuropean Commission; Hungarian Scientific Research FoundOrszagos Tudomanyos Kutatasi Alapprogramok (OTKA) [K-124544, K-115762]; NRDI [K 124212, TNN_16 123631]; Hungarian Academy of SciencesHungarian Academy of Sciences; New National Excellence Program of the Ministry of Human Capacities, Hungary [uNKP-18-4-BME-238]; BME Nanotechnology and Materials Science TKP2020 IE grant of NKFIH Hungary (BME IE-NAT TKP2020); [K-124212]; [NRDI TNN_16 123631] Funding text: The research within projects No. VEKOP-2.3.2-16-2017-00013 and GINOP-2.2.1-15-2017-00084 was supported by the European Union and the State of Hungary, co-financed by the European Regional Development Fund. N. V. M. and P. B. are grateful for grants by the Hungarian Scientific Research Found (K-124544 and K-115762). The K-124212 and an NRDI TNN_16 123631 grants are also acknowledged. I. M. S. thanks the Hungarian Academy of Sciences for a Janos Bolyai Research Fellowship and acknowledges the uNKP-18-4-BME-238 grant supported by the New National Excellence Program of the Ministry of Human Capacities, Hungary. An NRDI K 124212 and an NRDI TNN_16 123631 grants are acknowledged. The research reported in this paper was supported by the BME Nanotechnology and Materials Science TKP2020 IE grant of NKFIH Hungary (BME IE-NAT TKP2020). LA - English DB - MTMT ER - TY - JOUR AU - Solt, Hanna Erzsébet AU - Németh, Péter AU - Mohai, Miklós AU - Sajó, István AU - Klébert, Szilvia AU - Paiva Franguelli, Fernanda AU - Alexandre Fogaca, Lara AU - Pawar, RP. AU - Kótai, László TI - Temperature-Limited Synthesis of Copper Manganites along the Borderline of the Amorphous/Crystalline State and Their Catalytic Activity in CO Oxidation JF - ACS OMEGA J2 - ACS OMEGA VL - 6 PY - 2021 IS - 2 SP - 1523 EP - 1533 PG - 11 SN - 2470-1343 DO - 10.1021/acsomega.0c05301 UR - https://m2.mtmt.hu/api/publication/31801228 ID - 31801228 N1 - Export Date: 10 February 2021 Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest, H-1117, Hungary Department of Earth and Environmental Sciences, University of Pannonia, Egyetem út 10, Veszprém, H-8200, Hungary Szentágothai Research Center, University of Pécs, Ifjúság útja 20, Pécs, H-7624, Hungary Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Müegyetem rakpart 3, Budapest, H-1111, Hungary Organic Chemistry Department, Deogiri College, Station Road, Aurangabad, Maharastra, 431005, India Deuton-X Ltd., Selmeci ut 89, érd, 2030, Hungary Export Date: 11 March 2021 Correspondence Address: Kótai, L.; Institute of Materials and Environmental Chemistry, Magyar tudósok krt. 2, Hungary; email: kotai.laszlo@ttk.mta.hu Funding details: European Commission, EC Funding details: European Regional Development Fund, FEDER 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. P.N. acknowledges financial support from GINOP-2.3.2-15-2016-00053, János Bolyai Research Scholarship, and the ÚNKP-20-5-PE-7 New National Excellence program of the ministry for innovation and technology. LA - English DB - MTMT ER -