Article
Chemistry, Multidisciplinary
Jaemin Yoo, Dongkyu Lee, Jimo Lee, Taehyeong Kim, Hyungyu Jin, Gunsu S. Yun
Summary: The study demonstrates the regeneration process of iron oxide catalysts using atmospheric pressure plasma technology, with hematite powder exposed to microwave-driven argon plasma being transformed into magnetite. The addition of hydrogen during the surface treatment process lowers the reduction temperature, and controlled experiments confirm the catalytic effect of the plasma on the chemical state of the hematite.
Article
Physics, Applied
I Dirba, C. K. Chandra, Y. Ablets, J. Kohout, T. Kmjec, O. Kaman, O. Gutfleisch
Summary: In this study, alternative materials systems with high magnetization and low anisotropy are investigated for their potential in delivering enhanced heating power in magnetic fluid hyperthermia. The performance of iron-nitrogen (Fe-N), iron-boron (Fe-B) and iron-carbon (Fe-C) compounds is compared to conventional iron oxides. The findings show that materials with high magnetization but low anisotropy provide the best combination for maximizing the specific loss power (SLP) in alternating magnetic fields.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Environmental
Patricia Garcia-Munoz, Niels P. Zussblatt, Bradley F. Chmelka, Victor A. de la Pena O'Shea, Fernando Fresno
Summary: The photocatalytic activity of iron-grafted mesoporous Pt/TiO2 catalysts for hydrogen production from water-ethanol mixtures was investigated. Results showed that Fe is primarily located on the catalyst surfaces as Fe2O3 and does not dope the TiO2 structure. The catalyst with the lowest iron content exhibited the highest activity for ethanol dehydrogenation, attributed to the higher surface dispersion of Fe and efficient formation of a surface heterojunction between Fe2O3 and TiO2 that favors charge separation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Rita Reale, Giovanni Battista Andreozzi, Maria Pia Sammartino, Anna Maria Salvi
Summary: This study compares the iron stains on archeological marbles with those artificially produced on Carrara marbles and Travertine samples. Through integrated techniques such as optical and scanning electron microscopy, as well as Mossbauer and XPS spectroscopy, the mechanisms of rust formation and diffusion in carbonates were revealed, along with the identification of phases such as ferrihydrite, goethite, maghemite, nanomagnetite, and hematite.
Article
Chemistry, Physical
Liping Zhong, Mathias Barreau, Valerie Caps, Vasiliki Papaefthimiou, Michael Haevecker, Detre Teschner, Walid Baaziz, Elisa Borfecchia, Luca Braglia, Spyridon Zafeiratos
Summary: The addition of vanadium can stabilize the active state of cobalt, enhancing the activity and stability of the COPrOx reaction. The active sites are mainly composed of a cobalt-vanadate surface layer, with the presence of V5+ and Co2+ ions helping to inhibit carbonate species formation.
Article
Chemistry, Multidisciplinary
Eva Svabenska, Pavla Roupcova, Oldrich Schneeweiss
Summary: Detailed characteristics of wear particles formed in various brake pads were investigated. The composition of wear particles was found to be largely similar to that of the original brake pads, mainly consisting of iron oxides, iron, and iron carbon metallic particles. Some of the wear particles exhibited paramagnetic behavior.
Article
Electrochemistry
N. Elsayed, M. M. El-Rabiei, Mosaad Negem, F. El-Taib Heakal
Summary: This study investigates the suitability of metallic Ta as an electrocatalytic material for hydrogen production from acidic solutions. The morphological structure, crystal lattice system, and chemical composition of Ta are examined using various characterization techniques. The results confirm that Ta has higher electrocatalytic activity and lower overpotential compared to platinum for the hydrogen evolution reaction (HER). The overpotential decreases and the current density increases with increasing electrolyte concentration or temperature. Tafel slope analysis and impedance parameters indicate that HER proceeds through the Volmer-Heyrovsky mechanism. This study demonstrates that Ta is a sustainable, efficient, and promising cathode material for green hydrogen generation from sulphuric acid electrolytes.
ELECTROCHIMICA ACTA
(2022)
Article
Materials Science, Multidisciplinary
Dinesh Kumar Pati, S. Bhattacharjee, M. Mahapatra, B. N. Parida, Piyush R. Das, R. Padhee
Summary: In this study, a detailed investigation of the multifunctional properties of calcium strontium titanate substituted lead iron niobate ceramic oxide was reported. The compound exhibited a pseudocubic structure and presence of tensile strain, as well as photocatalytic activity and weak ferromagnetism and ferroelectricity.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
Andrea Atrei, Beata Lesiak-Orlowska, Jozsef Toth
Summary: The surface composition of magnetite nanoparticles, bare and functionalized with citrate, was investigated using XPS and ToF-SIMS. The results showed that the oxide composition was not modified by the citrate functionalization. The amount of citrate ions adsorbed on the surface was independent of the functionalization procedure. The citrate shell was found to be a single layer that only partially covered the nanoparticle surface. Additionally, the presence of ammonia molecules from the Fe(II) salt used in the nanoparticle preparation was detected.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Martina Damizia, Maria P. Bracciale, Francesco Anania, Lingyu Tai, Paolo De Filippis, Benedetta de Caprariis
Summary: Chemical Looping Hydrogen (CLH) enables the direct production of pure hydrogen using the redox properties of Fe and various reductants. This study successfully produced a highly pure hydrogen stream for Proton Exchange membrane Fuel Cells using bioethanol as a renewable fuel. The impact of temperature and chemical composition of Fe-based particles on carbon formation during the reduction step was thoroughly examined.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Liping Zhong, Mathias Barreau, Dingkai Chen, Valerie Caps, Michael Haevecker, Detre Teschner, David H. Simonne, Elisa Borfecchia, Walid Baaziz, Beetislav Smid, Spyridon Zafeiratos
Summary: For the preferential oxidation of CO in H2-rich mixtures, manganese-modified cobalt catalysts show higher activity and stability than pure cobalt catalysts, with the addition of manganese helping to improve the specific surface area of the catalyst. Manganese promotes CO conversion by stabilizing CoO phase during reaction conditions, suppresses CO methanation reaction, and promotes H2 oxidation at high temperatures.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Materials Science, Ceramics
Varsha C. Pujari, Pramod D. Mhase, Rohini M. Mahindrakar, Sher Singh Meena, Sanjay R. Kamble, Sunil M. Patange, Santosh S. Jadhav
Summary: Different Nd doping concentrations of Ba-Ca hexaferrites were synthesized using sol-gel auto-ignition method. The results showed that Nd doping modulated the magnetic behavior of the hexaferrites, resulting in moderate saturation magnetization and high coercivity values.
CERAMICS INTERNATIONAL
(2023)
Review
Chemistry, Physical
Yin Ma, X. R. Wang, Tong Li, Jiawei Zhang, Ji Gao, Z. Y. Sun
Summary: This paper examines the feasibility of using hydrogen and bioethanol blends as energy carriers in the future, providing comprehensive overviews on production, storage, and transportation. Current issues and potential solutions for the three stages are summarized, with optimistic prospects for hydrogen and bioethanol.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Paolo De Filippis, Livio D'Alvia, Martina Damizia, Benedetta de Caprariis, Zaccaria Del Prete
Summary: Hydrogen plays a key role in the energy transition, and the steam iron process can produce pure H-2 for hydrogen applications. Ethanol as a reducing agent has potential, but the deposition of coke must be avoided. The addition of MnO2 can enhance the reduction degree of iron oxides, increasing H-2 yield and process efficiency.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Geochemistry & Geophysics
Chunmei Chen, Aaron Thompson
Summary: Organic matter retards Fe(II) oxidation rates, while pre-existing Fe (oxyhydr)oxides play a significant role in catalyzing Fe(II) oxidation. Non-extractable soil minerals after removing Fe (oxyhydr)oxides have only a minor effect on oxidation rates.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Electrochemistry
Andrei Klyndyuk, Dzmitry S. Kharytonau, Michal Mosialek, Ekaterina A. Chizhova, Anna Komenda, Robert P. Socha, Malgorzata Zimowska
Summary: Double-doped NdBa(Fe, Co, Cu) (2)O5+delta layered perovskites were prepared and examined in this study. The physicochemical analysis showed that these materials have good electrical conductivity and linear thermal expansion coefficient, making them suitable as cathode materials for solid-oxide fuel cells.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Robert Kosydar, Michal Kolodziej, Erwin Lalik, Jacek Gurgul, Grzegorz Mordarski, Alicja Drelinkiewicz
Summary: The differences in hydrogenation activity of Pd/WO3 and Pd/MoO3 catalysts in polyfunctional reagents were studied. It was found that electronic interactions and the formation of hydrogen bronzes played significant roles in promoting selectivity and overall reaction rates.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Michal Mosialek, Malgorzata Zimowska, Dzmitry Kharytonau, Anna Komenda, Milosz Gorski, Marcel Krzan
Summary: This study aims to improve the performance of LSM cathodes in the low temperature range by adding YFC. The research found that the polarization resistance of the electrode increases with decreasing operating temperatures, and the LSM1 electrode has the lowest polarization resistance.
Article
Engineering, Mechanical
Dzmitry S. Kharytonau, Malgorzata Zimowska, Jacek Gurgul, Grzegorz Mordarski, Robert Powalisz, Adam Rutowski, Grzegorz Putynkowski, Adam Zieba, Ukasz Mokrzycki, Robert P. Socha
Summary: This study analyzed the causes of corrosion failure in the cooling circuit of a molding plant and proposed recommendations to prevent further failures.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Chemistry, Applied
Ewelina Jamroz, Joanna Tkaczewska, Leslaw Juszczak, Malgorzata Zimowska, Agnieszka Kawecka, Pawel Krzysciak, Magdalena Skora
Summary: This study presents the synthesis of innovative biopolymer double-layered films based on furcellaran and carboxymethyl cellulose, with the addition of lingonberry extract for enhanced antimicrobial and antioxidant activity. The films with the highest lingonberry extract content showed the best thermal stability and were used for storage of cherry tomatoes.
FOOD HYDROCOLLOIDS
(2022)
Article
Materials Science, Multidisciplinary
L. Kuterasinski, U. Filek, M. Zimowska, B. D. Napruszewska, M. Gackowski, P. J. Jodlowski
Summary: This paper reports the optimization of sonochemical assisted desilication of faujasite type zeolite. Shortening the duration of ultrasonic irradiation resulted in higher silicon extraction. The synthesized catalysts showed good catalytic activity and thermal stability, and the FAU-type zeolites can be used as catalysts for the production of diethyl ether or ethylene from ethanol at different reaction temperatures.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Applied
Ewelina Jamroz, Joanna Tkaczewska, Marzena Zajac, Paulina Guzik, Leslaw Juszczak, Agnieszka Kawecka, Katarzyna Turek, Malgorzata Zimowska, Aneta Wojdylo
Summary: Single-layered films based on furcellaran and protein hydrolysates from soybean bran were prepared, and a procedure for the preparation of double-layered films was developed. The addition of the second layer affected the functional properties of the films, increasing the thermal properties and antioxidant activity while decreasing the tensile strength and elongation at break parameters. The active films behaved similarly to synthetic films when used as packaging materials for storing butter.
Article
Materials Science, Multidisciplinary
Aleksandra Pacula, Alicja Drelinkiewicz, Malgorzata Ruggiero-Mikolajczyk, Piotr Pietrzyk, Robert P. Socha, Marcel Krzan, Malgorzata Nattich-Rak, Dorota Duraczynska, Elzbieta Bielanska, Malgorzata Zimowska
Summary: The study investigates the use of layered double hydroxides (LDHs) as precursors for metal oxides to prepare N-doped carbon materials. It is found that LDHs containing manganese can increase the quantity of carbonaceous product and affect its morphology, composition, and capacitive properties.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Lukasz Kuterasinski, Agnieszka M. Wojtkiewicz, Marta Sadowska, Paulina Zeliszewska, Bogna D. Napruszewska, Malgorzata Zimowska, Mateusz Pytlik, Andrzej Biessikirski
Summary: In this research, the detonation properties of Ammonium Nitrate Fuel Oil (ANFO) with modified zeolite Y were investigated. The addition of zeolite Y enhanced the detonation pressure, temperature, compression energy, and heat of explosion of ANFO. The volume of post-blast fumes was also reduced. The velocity of detonation of ANFO could be controlled by the choice of zeolite Y modification.
Article
Biochemistry & Molecular Biology
Jerzy Podobinski, Malgorzata Zimowska, Michal Sliwa, Jerzy Datka
Summary: The reaction of ethanol with CeO2 surface was investigated using IR spectroscopy. CeO2 was treated with vacuum and hydrogen for reduction, and with oxygen for oxidation. Ethoxy groups and new surface OH groups were formed at low coverages, while Ce-OH was consumed and ethoxy groups and water were formed at higher loadings. Three kinds of ethoxyls were found on CeO2, characterized by different frequencies of C-C-O units. The contribution of tridentate ethoxyls increased after reduction, and the contribution of monodentate ones increased after oxidation. Ethoxy groups were oxidized to acetate ions at higher temperatures, with the most reactive being monodentate ethoxyls. The highest amount of acetate species was observed on oxidized CeO2.
Article
Chemistry, Physical
Renata Sadek, Karolina Chalupka-Spiewak, Jean-Marc Krafft, Yannick Millot, Laetitia Valentin, Sandra Casale, Jacek Gurgul, Stanislaw Dzwigaj
Summary: In this study, three series of zeolite catalysts, including Co all-silica and Co Al-containing zeolites beta, were prepared for the selective oxidative dehydrogenation of propane to propylene. The incorporation of cobalt into the zeolite framework was successfully achieved using a two-step postsynthesis method, resulting in the formation of isolated framework pseudo-tetrahedral Co(II) species. The characterization of cobalt species at different cobalt content was performed using various techniques, such as NMR, FTIR, and DR UV-vis.
Article
Biochemistry & Molecular Biology
Jerzy Podobinski, Malgorzata Zimowska, Katarzyna Samson, Michal Sliwa, Jerzy Datka
Summary: The reaction of ethanol with various oxides was studied using IR spectroscopy. Ethanol reacts with surface OH groups on certain oxides to form ethoxy groups and water. The amount and types of ethoxy groups formed depend on the basicity of the oxides. Oxides with higher basicity produce more ethoxy groups, while oxides with lower basicity produce fewer ethoxy groups. The ability of oxides to oxidize the ethoxy groups and the temperature of the oxidation peak in the H-2-TPR diagram follow a similar trend, with CuO/ZrO2 showing the highest oxidation ability.
Article
Chemistry, Physical
Svitlana Orlyk, Pavlo Kyriienko, Andriy Kapran, Valeriy Chedryk, Dmytro Balakin, Jacek Gurgul, Malgorzata Zimowska, Yannick Millot, Stanislaw Dzwigaj
Summary: The research focused on the influence of BEA zeolite dealumination on the acid-base characteristics and catalytic performance of Zn-BEA compositions in propane dehydrogenation with CO2. The catalyst samples were prepared through a two-step post-synthesis procedure and characterized using various techniques. Full dealumination led to the formation of a mesoporous structure and decrease in acidity, resulting in enhanced selectivity and yield of propene. The results highlighted the advantages of using Zn-BEA catalysts in the presence of CO2 for producing the target olefin.
Article
Multidisciplinary Sciences
Rugmani Meenambal, Tomasz Kruk, Jacek Gurgul, Piotr Warszynski, Danuta Jantas
Summary: In this study, PAA-CeO nanoparticles were synthesized and found to have neuroprotective effects against cell damage induced by H2O2 and 6-OHDA, reducing necrotic changes and partially attenuating caspase-3 activity. However, there was no impact on ROS formation induced by H2O2.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Sadegh Shakeri, Zaneta Swiatkowska-Warkocka, Oliwia Polit, Tatiana Itina, Alexey Maximenko, Joanna Depciuch, Jacek Gurgul, Marzena Mitura-Nowak, Marcin Perzanowski, Andrzej Dziedzic, Jaroslaw Necki
Summary: Phase formation by pulsed laser irradiation of suspended nanoparticles has been studied for its potential application as an electrocatalyst in ethanol oxidation fuel cells. The authors analyze the bond breaking/formation process during the absorption of laser pulses and discuss the interaction between nano-laser pulses and suspension for practical control of the synthesis process. The study provides insights into the dominant role of physical and chemical reactions in the formation of heterostructures.
ADVANCED FUNCTIONAL MATERIALS
(2023)