TY - JOUR AU - Najari, Sara AU - Saeidi, Samrand AU - Sápi, András AU - Szamosvölgyi, Ákos AU - Papp, Ádám AU - Efremova, Anastasiia AU - Bali, Henrik AU - Kónya, Zoltán TI - Synergistic enhancement of CO2 hydrogenation to C5+ hydrocarbons using mixed Fe5C2 and Na-Fe3O4 catalysts: Effects of oxide/carbide ratio, proximity, and reduction JF - CHEMICAL ENGINEERING JOURNAL J2 - CHEM ENG J VL - 485 PY - 2024 PG - 16 SN - 1385-8947 DO - 10.1016/j.cej.2024.149787 UR - https://m2.mtmt.hu/api/publication/34646124 ID - 34646124 LA - English DB - MTMT ER - TY - JOUR AU - Szenti, Imre AU - Efremova, Anastasiia AU - Kiss, János AU - Sápi, András AU - Óvári, László AU - Halasi, Gyula AU - Haselmann, Ulrich AU - Zhang, Zhaoli AU - Morales-Vidal, Jordi AU - Baán, Kornélia AU - Kukovecz, Ákos AU - López, Núria AU - Kónya, Zoltán TI - Pt/MnO Interface Induced Defects for High Reverse Water Gas Shift Activity JF - ANGEWANDTE CHEMIE-INTERNATIONAL EDITION J2 - ANGEW CHEM INT EDIT VL - 63 PY - 2024 IS - 8 PG - 7 SN - 1433-7851 DO - 10.1002/anie.202317343 UR - https://m2.mtmt.hu/api/publication/34471429 ID - 34471429 AB - The implementation of supported metal catalysts heavily relies on the synergistic interactions between metal nanoparticles and the material they are dispersed on. It is clear that interfacial perimeter sites have outstanding skills for turning catalytic reactions over, however, high activity and selectivity of the designed interface‐induced metal distortion can also obtain catalysts for the most crucial industrial processes as evidenced in this paper. Herein, the beneficial synergy established between designed Pt nanoparticles and MnO in the course of the reverse water gas shift (RWGS) reaction resulted in a Pt/MnO catalyst having ~10 times higher activity compared to the reference Pt/SBA‐15 catalyst with >99% CO selectivity. Under activation, a crystal assembly through the metallic Pt (110) and MnO evolved, where the plane distance differences caused a mismatched row structure in softer Pt nanoparticles, which was identified by microscopic and surface‐sensitive spectroscopic characterizations combined with density functional theory simulations. The generated edge dislocations caused the Pt lattice expansion which led to the weakening of the Pt‐CO bond. Even though MnO also exhibited an adverse effect on Pt by lowering the number of exposed metal sites, rapid desorption of the linearly adsorbed CO species governed the performance of the Pt/MnO in the RWGS. LA - English DB - MTMT ER - TY - JOUR AU - Shah Abedi, Mahsa AU - Szamosvölgyi, Ákos AU - Sápi, András AU - Kukovecz, Ákos AU - Kónya, Zoltán AU - Gyulavári, Tamás AU - Pap, Zsolt TI - Influence of Rapid Heat Treatment on the Photocatalytic Activity and Stability of Strontium Titanates against a Broad Range of Pollutants JF - CATALYSTS J2 - CATALYSTS VL - 13 PY - 2023 IS - 2 PG - 13 SN - 2073-4344 DO - 10.3390/catal13020219 UR - https://m2.mtmt.hu/api/publication/33573030 ID - 33573030 AB - Strontium titanate (STO) photocatalysts were prepared via a slightly modified Pechini sol–gel method. A unique rapid calcination technique with a short exposure time was used to obtain crystalline products. The samples were characterized by X-ray diffractometry, scanning electron microscopy, diffuse reflectance spectroscopy, infrared spectroscopy, nitrogen adsorption–desorption measurements, and X-ray photoelectron spectroscopy. Their photocatalytic activity was evaluated by the photocatalytic oxidation of phenol, oxalic acid, and chlorophenol under UV light irradiation using commercial STO as a reference. These pollutants, together with glucose and propanol, were used to investigate the stability of the samples against various functional groups. All our samples exhibited higher photocatalytic activity than the commercial STO reference. With increasing calcination temperature, the crystallinity and primary crystallite sizes increased while the band gaps and specific surface areas decreased. The photocatalytic activity of the most efficient sample was explained by the presence of SrCO3 on its surface. The STO catalysts were highly stable as they largely retained their crystalline composition after exposure to chemicals with different functional groups. Finally, we compared the costs associated with the unique calcination technique with a more conventional one and found that our method is ~35% more cost-effective. LA - English DB - MTMT ER - TY - JOUR AU - Al-Aqtasha, Owais AU - Farkas, Ferenc AU - Sápi, András AU - Szenti, Imre AU - Boldizsár, Tamás AU - B.Ábrahámné, Kornélia AU - Kónya, Zoltán TI - Differently shaped Al2O3-based Pd catalysts loaded catalytic converter for novel non-road mobile machinery exhaust systems JF - REACTION KINETICS MECHANISMS AND CATALYSIS J2 - REACT KINET MECH CATAL VL - 136 PY - 2023 IS - 1 SP - 149 EP - 161 PG - 13 SN - 1878-5190 DO - 10.1007/s11144-022-02291-x UR - https://m2.mtmt.hu/api/publication/33105609 ID - 33105609 LA - English DB - MTMT ER - TY - JOUR AU - Ballai, Gergő AU - Sőrés, Milán Attila AU - Vásárhelyi, Lívia AU - Szenti, Imre AU - Kun, Róbert AU - Hartmann, Bálint AU - Sebők, Dániel AU - Farkas, Ferenc AU - Zahoor, A. AU - Mao, G. AU - Sápi, András AU - Kukovecz, Ákos AU - Kónya, Zoltán TI - Exploration of Li-Ion Batteries during a Long-Term Heat Endurance Test Using 3D Temporal Microcomputed Tomography Investigation JF - ENERGY TECHNOLOGY J2 - ENERGY TECHNOL-GER VL - 11 PY - 2023 IS - 8 PG - 10 SN - 2194-4288 DO - 10.1002/ente.202300207 UR - https://m2.mtmt.hu/api/publication/34536297 ID - 34536297 LA - English DB - MTMT ER - TY - JOUR AU - Ballai, Gergő AU - Kotnik, Tomaž AU - Finšgar, Matjaž AU - Pintar, Albin AU - Kónya, Zoltán AU - Sápi, András AU - Kovačič, Sebastijan TI - Highly Porous Polymer Beads Coated with Nanometer-Thick Metal Oxide Films for Photocatalytic Oxidation of Bisphenol A JF - ACS APPLIED NANO MATERIALS J2 - ACS APPL NANO MATER VL - 6 PY - 2023 IS - 21 SP - 20089 EP - 20098 PG - 10 SN - 2574-0970 DO - 10.1021/acsanm.3c03891 UR - https://m2.mtmt.hu/api/publication/34239731 ID - 34239731 LA - English DB - MTMT ER - TY - JOUR AU - Benkó, Timea AU - Shen, S. AU - Németh, Miklós László AU - Su, J. AU - Szamosvölgyi, Ákos AU - Kovács, Zoltán AU - Sáfrán, György AU - Al-Zuraiji, S.M. AU - Horváth, Zsolt Endre AU - Sápi, András AU - Kónya, Zoltán AU - Pap, József Sándor TI - BiVO4 charge transfer control by a water-insoluble iron complex for solar water oxidation JF - APPLIED CATALYSIS A-GENERAL J2 - APPL CATAL A-GEN VL - 652 PY - 2023 PG - 15 SN - 0926-860X DO - 10.1016/j.apcata.2023.119035 UR - https://m2.mtmt.hu/api/publication/33628408 ID - 33628408 LA - English DB - MTMT ER - TY - JOUR AU - Boldizsár, Tamás AU - Bali, Henrik AU - Szenti, Imre AU - Sebők-Papp, Imre AU - Bán, Zsolt AU - Herczeg, Sára AU - Barna, Gábor AU - Sápi, András AU - Kukovecz, Ákos AU - Kónya, Zoltán TI - Environmental-Friendly Economical Cordierite-Mullite-based Ceramics for Kiln Furniture Production and Supports for CO2 Hydrogenation towards C5+ fuels JF - JOURNAL OF THE EUROPEAN CERAMIC SOCIETY J2 - J EUR CERAM SOC VL - 43 PY - 2023 IS - 13 SP - 5596 EP - 5605 PG - 10 SN - 0955-2219 DO - 10.1016/j.jeurceramsoc.2023.04.057 UR - https://m2.mtmt.hu/api/publication/33784581 ID - 33784581 LA - English DB - MTMT ER - TY - CHAP AU - Pantoja Alvarez, Fernanda Liceth AU - Beszédes, Sándor AU - Gyulavári, Tamás AU - Nyergesné Illés, Erzsébet AU - Kozma, Gábor AU - Sápi, András AU - László, Zsuzsanna ED - Tünde, Alapi ED - Berkecz, Róbert ED - Ilisz, István TI - Ammonium removal from aqueous solution in presence of organic compounds, using biochar from banana leaves. Competitive isotherms models T2 - Proceedings of the 29th International Symposium on Analytical and Environmental Problems PB - University of Szeged CY - Szeged SN - 9789633069639 PY - 2023 SP - 46 EP - 46 PG - 1 UR - https://m2.mtmt.hu/api/publication/34328535 ID - 34328535 LA - English DB - MTMT ER - TY - JOUR AU - Kedves, Endre-Zsolt AU - Fodor, Claudiu AU - Fazekas, Ákos Ferenc AU - Székely, István AU - Szamosvölgyi, Ákos AU - Sápi, András AU - Kónya, Zoltán AU - Cristian Pop, Lucian AU - Baia, Lucian AU - Pap, Zsolt TI - α-MoO3 with inhibitive properties in Fenton reactions and insights on its general impact on OH radical based advanced oxidation processes JF - APPLIED SURFACE SCIENCE J2 - APPL SURF SCI VL - 624 PY - 2023 PG - 11 SN - 0169-4332 DO - 10.1016/j.apsusc.2023.156914 UR - https://m2.mtmt.hu/api/publication/33693480 ID - 33693480 N1 - Faculty of Physics, Babeş-Bolyai University, M. Kogălniceanu 1, Cluj-Napoca, RO-400084, Romania Centre of Nanostructured Materials and Bio-Nano Interfaces, Institute for Interdisciplinary, Research on Bio-Nano-Sciences, Treboniu Laurian 42, Cluj-Napoca, RO-400271, Romania Department of Applied and Environmental Chemistry, University of Szeged, Rerrich tér 1, HU-6720, Szeged, Hungary Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János Street 11, Cluj-Napoca, RO-400028, Romania Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, Szeged, H-6725, Hungary Laboratory for Advanced Materials and Applied Technologies, Institute for Research, Development and Innovation in Applied Natural Sciences, Fântânele 30, Cluj-Napoca, RO-400294, Romania Export Date: 20 April 2023 CODEN: ASUSE Correspondence Address: Baia, L.; Laboratory for Advanced Materials and Applied Technologies, Romania; email: lucian.baia@ubbcluj.ro Funding details: 2019-2.1.13-TÉT_IN-2020-00015 Funding details: Magyar Tudományos Akadémia, MTA, UNKP-21-5- SZTE- 575, UNKP-21-5-SZTE-586 Funding details: Emberi Eroforrások Minisztériuma, EMMI, 20391-3/2018/FEKUSTRAT, EFOP-3.6.1-16-2016-00014, K_21 138714, SNN_135918 Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA, TKP2021-NVA-19 Funding details: Innovációs és Technológiai Minisztérium Funding text 1: Endre-Zsolt Kedves is very grateful for NTP-NFTÖ scholarship (NTP-NFTÖ-21-B-0284). ZsP and AS gratefully acknowledges the support of the Bolyai Janos Research Fellowship of the Hungarian Academy of Science and the “UNKP-21-5-SZTE-586” and “UNKP-21-5- SZTE- 575” New National Excellence Program as well as the funding provided by the Indo-Hungarian TÉT project (2019-2.1.13-TÉT_IN-2020-00015) of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund. The Ministry of Human Capacities through the EFOP-3.6.1-16-2016-00014 project and the 20391-3/2018/FEKUSTRAT are acknowledged. ZK is grateful for K_21 138714 and SNN_135918 project for the Hungarian National Research, Development and Innovation Office. Project no. TKP2021-NVA-19 has been implemented with the support provided by the Ministry of Innovation and Technology of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021-NVA funding scheme. Funding text 2: Endre-Zsolt Kedves is very grateful for NTP-NFTÖ scholarship (NTP-NFTÖ-21-B-0284). ZsP and AS gratefully acknowledges the support of the Bolyai Janos Research Fellowship of the Hungarian Academy of Science and the “UNKP-21-5-SZTE-586” and “UNKP-21-5- SZTE- 575” New National Excellence Program as well as the funding provided by the Indo-Hungarian TÉT project (2019-2.1.13-TÉT_IN-2020-00015) of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund. The Ministry of Human Capacities through the EFOP-3.6.1-16-2016-00014 project and the 20391-3/2018/FEKUSTRAT are acknowledged. ZK is grateful for K_21 138714 and SNN_135918 project for the Hungarian National Research, Development and Innovation Office. Project no. TKP2021-NVA-19 has been implemented with the support provided by the Ministry of Innovation and Technology of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021-NVA funding scheme. AB - MoO3 is an intensively researched metal oxide, and it is considered a promising visible light driven photocatalyst and an excellent adsorbent of cationic dyes. In the present work orthorhombic α-MoO3 was obtained via calcination of ammonium heptamolybdate where structural modifications were induced by changing the applied calcination temperature (400–750 °C). Further subtle structural (crystallographic plane ratio) and morphological modifications were achieved via hydrothermal recrystallization. Differences between samples were clearly evidenced by various characterization techniques, especially in the case of the crystalline facet ratio and the morphology. The differently structured α-MoO3 samples were investigated as an inhibitor for Fenton reactions where the organic compounds decomposition relies on the generation of [rad]OH radicals. It was found that α-MoO3 strongly inhibits the rate of methyl orange (MO) decolorization. This might imply that MoO3 could be a [rad]OH radical scavenger since Fenton reactions’ effectivity relies on the presence of [rad]OH and [rad]O2 – radicals. We demonstrated that the inhibition efficiency of α-MoO3 correlates strongly with the acidification rate of the aqueous solution in the presence of α-MoO3. However, this pH decline was consistent with crystalline facet ratio within a sample series, while the recrystallized samples disprove this structural connection showing a more complex relationship between the structural characteristics of α-MoO3 and its inhibitive properties of Fenton reactions. The present work pointed out that MoO3 can inhibit reactions which are based on intensive OH radical generation processes such as photocatalysis. © 2023 LA - English DB - MTMT ER -