TY - JOUR AU - Samaniego Andrade, Samantha Kathiuska AU - SHIVA SHANKAR, LAKSHMI AU - Bakos, István AU - Klébert, Szilvia AU - Kun, Róbert AU - Mohai, Miklós AU - Nagy, Balázs AU - Nagyné László, Krisztina TI - The Influence of Reduced Graphene Oxide on the Texture and Chemistry of N,S-Doped Porous Carbon. Implications for Electrocatalytic and Energy Storage Applications JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 13 PY - 2023 IS - 16 PG - 22 SN - 2079-4991 DO - 10.3390/nano13162364 UR - https://m2.mtmt.hu/api/publication/34106212 ID - 34106212 N1 - Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Budapest, 1521, Hungary Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, Budapest, 1117, Hungary Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Budapest, 1521, Hungary H-Ion Research, Development and Innovation Ltd, Konkoly-Thege út 29-33, Budapest, 1121, Hungary Export Date: 4 September 2023 Correspondence Address: László, K.; Department of Physical Chemistry and Materials Science, Hungary; email: laszlo.krisztina@vbk.bme.hu AB - In this work, we study the influence of reduced graphene oxide (rGO) on the morphology and chemistry of highly porous N,S-doped carbon cryogels. Simultaneously, we propose an easily upscalable route to prepare such carbons by adding graphene oxide (GO) in as-received suspended form to the aqueous solution of the ι-carrageenan and urea precursors. First, 1.25–5 wt% GO was incorporated into the dual-doped polymer matrix. The CO2, CO, and H2O emitted during the thermal treatments resulted in the multifaceted modification of the textural and chemical properties of the porous carbon. This facilitated the formation of micropores through self-activation and resulted in a substantial increase in the apparent surface area (up to 1780 m2/g) and pore volume (up to 1.72 cm3/g). However, adding 5 wt% GO led to overactivation. The incorporated rGO has an ordering effect on the carbon matrix. The evolving oxidative species influence the surface chemistry in a complex way, but sufficient N and S atoms (ca. 4 and >1 at%, respectively) were preserved in addition to the large number of developing defects. Despite the complexity of the textural and chemical changes, rGO increased the electrical conductivity monotonically. In alkaline oxygen reduction reaction (ORR) tests, the sample with 1.25 wt% GO exhibited a 4e− mechanism and reasonable stability, but a higher rGO content gradually compromised the performance of the electrodes. The sample containing 5 wt% GO was the most sensitive under oxidative conditions, but after stabilization it exhibited the highest gravimetric capacitance. In Li-ion battery tests, the coulombic efficiency of all the samples was consistently above 98%, indicating the high potential of these carbons for efficient Li-ion insertion and reinsertion during the charge–discharge process, thereby providing a promising alternative for graphite-based anodes. The cell from the 1.25 wt% GO sample showed an initial discharge capacity of 313 mAh/g, 95.1% capacity retention, and 99.3% coulombic efficiency after 50 charge–discharge cycles. 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 - Samaniego Andrade, Samantha Kathiuska AU - Bakos, István AU - Dobos, Gábor AU - Farkas, Attila AU - Kiss, Gábor AU - Klébert, Szilvia AU - Madarász, János AU - Nagyné László, Krisztina TI - Biomass Related Highly Porous Metal Free Carbon for Gas Storage and Electrocatalytic Applications JF - MATERIALS J2 - MATERIALS VL - 14 PY - 2021 IS - 13 PG - 16 SN - 1996-1944 DO - 10.3390/ma14133488 UR - https://m2.mtmt.hu/api/publication/32080023 ID - 32080023 N1 - Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, Budapest, 1521, Hungary Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Eötvös Loránd Research Network, Magyar tudósok körútja 2, Budapest, 1117, Hungary Department of Atomic Physics, Budapest University of Technology and Economics, Budapest, 1521, Hungary Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, 1521, Hungary Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, 1521, Hungary Export Date: 29 September 2021 Correspondence Address: László, K.; Department of Physical Chemistry and Materials Science, Hungary; email: laszlo.krisztina@vbk.bme.hu Funding details: 734641, H2020-MSCA-RISE-2016 Funding details: European Commission, EC Funding details: European Regional Development Fund, ERDF Funding details: National Research, Development and Innovation Office Funding text 1: This research was funded by the VEKOP-2.3.2-16-2017-00013 and 2020-3.1.1-ZFR-KVG-2020-00006 projects. The VEKOP project is supported by the EU and by Hungary, co-financed by the European Regional Development Fund, while the 2020-3.1.2-ZFR-KVG program is supported by the National Research, Development and Innovation Office (NRDI). The work is also part of the EU project NANOMED (H2020-MSCA-RISE-2016, #734641). The research was supported by the BME-Biotechnology (BME IE-BIO) TKP2020 IE grant. S.S.A. would like to thank the Stipendium Hungaricum scholarship program. LA - English DB - MTMT ER - TY - JOUR AU - Bakos, István AU - Vass, Ádám AU - Muckley, Eric S. AU - Ivanov, Ilia N. AU - Keresztes, Zsófia TI - Indirect electrochemical method for high accuracy quantification of protein adsorption on gold surfaces JF - ELECTROCHEMISTRY COMMUNICATIONS J2 - ELECTROCHEM COMMUN VL - 124 PY - 2021 PG - 5 SN - 1388-2481 DO - 10.1016/j.elecom.2021.106961 UR - https://m2.mtmt.hu/api/publication/31873518 ID - 31873518 LA - English DB - MTMT ER - TY - JOUR AU - Alesker, Maria AU - Bakos, István AU - Davies, Veronica AU - Jia, Qingying AU - Burlaka, Luba AU - Yarmiayev, Valeria AU - Muzikansky, Anya AU - Kitayev, Anna AU - Page, Miles AU - Mukerjee, Sanjeev AU - Zitoun, David TI - Operando X-ray absorption spectroscopy of a Pd/γ-NiOOH 2 nm cubes hydrogen oxidation catalyst in an alkaline membrane fuel cell JF - CATALYSIS SCIENCE & TECHNOLOGY J2 - CATAL SCIENCE & TECHNOLOGY VL - 11 PY - 2021 SP - 1337 EP - 1344 PG - 8 SN - 2044-4753 DO - 10.1039/D0CY01815E UR - https://m2.mtmt.hu/api/publication/31812975 ID - 31812975 LA - English DB - MTMT ER - TY - JOUR AU - Borbáth, Irina AU - Bakos, István AU - Pászti, Zoltán AU - Szijjártó, Gábor AU - Tompos, András TI - Design of SnPt/C cathode electrocatalysts with optimized Sn/Pt surface composition for potential use in Polymer Electrolyte Membrane Fuel Cells JF - CATALYSIS TODAY J2 - CATAL TODAY VL - 366 PY - 2021 SP - 20 EP - 30 PG - 11 SN - 0920-5861 DO - 10.1016/j.cattod.2020.06.029 UR - https://m2.mtmt.hu/api/publication/31346289 ID - 31346289 N1 - CODEN: CATTE LA - English DB - MTMT ER - TY - JOUR AU - Diczházi, D. AU - Borbáth, Irina AU - Bakos, István AU - Szijjártó, Gábor AU - Tompos, András AU - Pászti, Zoltán TI - Design of Mo-doped mixed oxide–carbon composite supports for Pt-based electrocatalysts: the nature of the Mo-Pt interaction JF - CATALYSIS TODAY J2 - CATAL TODAY VL - 366 PY - 2021 SP - 31 EP - 40 PG - 10 SN - 0920-5861 DO - 10.1016/j.cattod.2020.04.004 UR - https://m2.mtmt.hu/api/publication/31292158 ID - 31292158 N1 - Cited By :10 Export Date: 12 February 2024 CODEN: CATTE Correspondence Address: Borbáth, I.; P.O.Box 286, Irina Borbáth, Hungary; email: borbath.irina@ttk.hu Funding details: European Commission, EC Funding details: European Regional Development Fund, ERDF, 2017-2.3.7-TÉT-IN-2017-00049 Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA, NNE130004, TÉT-IN-2017 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 . Funding text 2: Project no. 2017-2.3.7-TÉT-IN-2017-00049 has been implemented with the support provided from the National Research, Development and Innovation Fund of Hungary , financed under the TÉT-IN-2017 funding scheme. Funding text 3: 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. LA - English DB - MTMT ER - TY - JOUR AU - Bakos, László Péter AU - Sárvári, Lőrinc AU - Nagyné László, Krisztina AU - Mizsei, János AU - Kónya, Zoltán AU - Halasi, Gyula AU - Hernádi, Klára AU - Szabó, Anna AU - Berkesi, Dániel Simon AU - Bakos, István AU - Szilágyi, Imre Miklós TI - Electric and Photocatalytic Properties of Graphene Oxide Depending on the Degree of Its Reduction JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 10 PY - 2020 IS - 11 PG - 14 SN - 2079-4991 DO - 10.3390/nano10112313 UR - https://m2.mtmt.hu/api/publication/31670744 ID - 31670744 N1 - Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szent Gellért tér 4, Budapest, H-1111, Hungary Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, Budafoki út 8. F. I. building, Budapest, H–1111, Hungary Department of Electron Devices, Budapest University of Technology and Economics, Budapest, H-1117, Hungary Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1, Szeged, H-6720, Hungary Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, Budapest, H-1117, Hungary Cited By :1 Export Date: 11 March 2021 Correspondence Address: Szilágyi, I.M.; Department of Inorganic and Analytical Chemistry, Szent Gellért tér 4, Hungary; email: imre.szilagyi@mail.bme.hu Funding details: BME IE-NAT TKP2020 Funding details: VEKOP-2.3.2-16-2017-00013 Funding details: European Commission***Delivered and deleted from Elsevier end because this record is to be no longer updated or in business with Elsevier on Date 10-03-2020***, EC Funding details: European Regional Development Fund, FEDER Funding text 1: A GINOP-2.2.1-15-2017-00084, an NRDI K 124212 and an NRDI TNN_16 123631 grants are acknowledged. The work performed within project 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. 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 text 2: Funding: A GINOP-2.2.1-15-2017-00084, an NRDI K 124212 and an NRDI TNN_16 123631 grants are acknowledged. The work performed within project 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. 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 [VEKOP-2.3.2-16-2017-00013]; European Regional Development FundEuropean Commission; BME Nanotechnology and Materials Science TKP2020 IE grant of NKFIH Hungary (BME IE-NAT TKP2020); State of Hungary; [AGINOP-2.2.1-15-2017-00084]; [NRDIK124212]; [NRDI TNN_16 123631] Funding text: AGINOP-2.2.1-15-2017-00084, an NRDIK124212 and an NRDI TNN_16 123631 grants are acknowledged. The work performed within project 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. 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 - Edward, John AU - Steven, Coburn AU - Chuan, Liu AU - John, McAughey AU - Derek, Mariner AU - Kevin, G. McAdam AU - Bakos, István AU - Dóbé, Sándor TI - Gas-Particle Partitioning of Formaldehyde in Mainstream Cigarette Smoke JF - BEITRAGE ZUR TABAKFORSCHUNG INTERNATIONAL J2 - BEITR TABAKFORSCH INT VL - 29 PY - 2020 IS - 1 SP - 2 EP - 20 PG - 19 SN - 0173-783X DO - 10.2478/cttr-2020-0002 UR - https://m2.mtmt.hu/api/publication/31387568 ID - 31387568 N1 - British American Tobacco, RandD Centre, Regents Park Road, Southampton, SO15 8TL, United Kingdom McAdam Scientific Ltd., 50 Leigh Road, Eastleigh, SO50 9DT, United Kingdom Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, Budapest, H-1117, Hungary Cited By :3 Export Date: 13 October 2022 Correspondence Address: John, E.; British American Tobacco, Regents Park Road, United Kingdom LA - English DB - MTMT ER - TY - JOUR AU - Nagy, Balázs AU - Bakos, István AU - Geissler, Erik AU - Nagyné László, Krisztina TI - Water-Ionic Liquid Binary Mixture Tailored Resorcinol-Formaldehyde Carbon Aerogels without Added Catalyst JF - MATERIALS J2 - MATERIALS VL - 12 PY - 2019 IS - 24 SN - 1996-1944 DO - 10.3390/ma12244208 UR - https://m2.mtmt.hu/api/publication/31161815 ID - 31161815 AB - The potential applications of mesoporous carbon aerogels are wide-ranging. These gels are often obtained from resorcinol-formaldehyde (RF) hydrogel precursors. The sol-gel method in this synthesis provides an efficient and versatile means of product control through systematic variation of process conditions, such as pH, stoichiometry, concentration, catalyst, further additives, etc., in addition to the drying and pyrolytic conditions. Here, a novel means of tuning the texture of carbon aerogels is proposed. Water-1-ethyl-3-methylimidazolium ethyl sulfate ([emim][EtSO4] mixtures constitutes a polycondensation medium that requires no added catalyst, thus yielding an intrinsically metal-free carbon aerogel after pyrolysis. We also show that the carbon morphology is tailored by the supramolecular structure of the aqueous ionic liquid. The results of scanning electron micrographs, low-temperature nitrogen adsorption/desorption isotherms, and small-angle X-ray scattering (SAXS) confirm that changing the initial water concentration from 9 to 55 wt % gives rise to systematic alteration of the mesopore size and volume, as well as of the bead size. The pore structure becomes consolidated only when the water content exceeds 25 wt %. When the water content reaches 55 wt %, the bead size increases by two orders of magnitude. The electrocatalytic performance, however, is compromised, most probably by structural defects. © 2019 by the authors. LA - English DB - MTMT ER -