Article
Chemistry, Applied
Xinyu Guo, Bo Liu, Xinhua Gao, Fugui He, Qingxiang Ma, Subing Fan, Tian-sheng Zhao, Jumei Tian, Prasert Reubroycharoen, Jianli Zhang
Summary: The hydrophilic/hydrophobic properties of catalysts greatly affect product distribution in Fischer-Tropsch synthesis by modulating secondary reactions. It has been found that hydrophilic modification can inhibit secondary reactions. In this study, Fe catalysts supported on hydroxyapatite (HAP) were prepared using an impregnation method. The effect of catalyst surface properties on CO hydrogenation product distribution was investigated. The surface hydroxyl groups on Fe/HAP promoted carbon chain growth and improved olefin selectivity. The addition of Na promoter suppressed the formation of undesirable CH4, further enhancing the selectivity for light olefins and C5+ hydrocarbons. Fe/HAP exhibited lower CH4 selectivity (15%) and higher C5+ selectivity (45%) compared to Fe2O3. Meanwhile, Fe/HAP-Na catalysts achieved a higher selectivity of light olefins (with an O/P ratio of 4.51).
Article
Nanoscience & Nanotechnology
Bogdan Jurca, Lu Peng, Ana Primo, Alvaro Gordillo, Vasile Parvulescu, Hermenegildo Garcia
Summary: The study demonstrates that Co-Fe alloy nanoparticles supported on N-doped graphitic carbon can efficiently catalyze the Sabatier CO2 hydrogenation, leading to increased activity and CH4 selectivity. Under high temperature conditions, the catalyst exhibits excellent catalytic performance and stability.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Applied
Tianmi Tang, Yin Wang, Jingyi Han, Qiaoqiao Zhang, Xue Bai, Xiaodi Niu, Zhenlu Wang, Jingqi Guan
Summary: In this study, a novel dual-atom catalyst named CoFe-NG was synthesized, which exhibited remarkable catalytic performance in the oxygen reduction reaction. It showed higher endurance to methanol/carbon monoxide poisoning and better durability than commercial Pt/C. The assembled Zn-air battery with CoFe-NG as the air electrode delivered a peak power density of 230 mW cm-2 and exhibited negligible change in output voltage at 5 mA cm-2 for 250 h. Theoretical calculations revealed the lower ORR barrier of FeN3-CoN3 sites on N-doped graphene compared to FeN4 and CoN4 sites.
CHINESE JOURNAL OF CATALYSIS
(2023)
Article
Engineering, Environmental
Junjie Chen, Chih-Han Liu, Hien N. Pham, Todd J. Toops, Abhaya K. Datye, Eleni A. Kyriakidou
Summary: By tuning the surface coverage of γ-Al2O3 nanosheets, ultrastable Pt/CeO2-Al2O3 nanosheet catalysts with improved low-temperature activity and stability were successfully synthesized based on the Sabatier principle of metal-support interaction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Sergei A. Chernyak, Dmitrii N. Stolbov, Konstantin I. Maslakov, Sergey V. Maksimov, Ruslan V. Kazantsev, Oleg L. Eliseev, Dmitry O. Moskovskikh, Serguei V. Savilov
Summary: Different carbon nanomaterials are considered promising supports for Fischer-Tropsch synthesis catalysts. This study successfully synthesized consolidated Co and Fe catalysts supported on graphene nanoflakes for the first time using spark plasma sintering. The results showed that sintering significantly increased the activity and TOF of the Co catalyst, while decreasing the activity of the Fe catalyst but increasing its C5+ selectivity and olefins to paraffins ratio. These improvements were attributed to the unique structure of the nanoparticles and the close contact between the support and the metal particles.
Article
Chemistry, Applied
Yibo Gao, Erjiang Hu, Yang Yi, Geyuan Yin, Zuohua Huang
Summary: In this study, ceria-based catalysts with three morphologies (CeO2-C, CeO2-R, CeO2-S) doped with 3d transition metals have been used in ammonia decomposition reaction (ADR), showing excellent catalytic performance. The FeCo/CeO2-S catalyst exhibited the highest ammonia conversion rate and hydrogen generation rate.
FUEL PROCESSING TECHNOLOGY
(2023)
Review
Environmental Sciences
Jianlong Wang, Juntao Tang
Summary: This review systematically analyzed and summarized recent advances in Fe-based Fenton-like catalysts, including preparation methods, characterization techniques, introduction of conventional catalysts, and modification strategies. The review provides important information for further advancing the development and application of Fe-based catalysts for water treatment.
Article
Chemistry, Physical
Junsheng Chen, Hao Li, Shuangming Chen, Jingyuan Fei, Chang Liu, Zixun Yu, Kihyun Shin, Zongwen Liu, Li Song, Graeme Henkelman, Li Wei, Yuan Chen
Summary: This study investigates the effect of doping chromium on the activity of cobalt (oxy)hydroxide catalysts through a combination of DFT calculations and catalyst characterization. The results show that the optimal Co5Fe3Cr2 (oxy)hydroxide exhibits superior performance in terms of high current density and turnover frequency. Analysis from X-ray absorption and photoelectron spectroscopies reveals that chromium promotes the distribution of cobalt atoms and modifies the electronic structure. Quasi-operando electron energy loss spectroscopy confirms that chromium accelerates the oxidation of Co2+ to higher valence species, leading to significantly higher catalytic activity.
ADVANCED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Shoufu Cao, Sainan Zhou, Hongyu Chen, Shuxian Wei, Siyuan Liu, Xiaojing Lin, Xiaodong Chen, Zhaojie Wang, Wenyue Guo, Xiaoqing Lu
Summary: Atomically dispersed catalysts, specifically dual-atom catalysts (DACs), have shown promising potential in CO2 reduction reaction (CO2RR). This study investigates the advantages of DACs in CO2RR through the use of FeCo-NC and Fe-NC/Co-NC catalysts. The results demonstrate that DACs have a balanced interaction between dual-atom centers and N coordination, leading to improved catalytic performance in the production of CH3OH and CH4 while inhibiting hydrogen evolution reaction.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Sajid Hussain, Eleonora Aneggi, Daniele Goi, Alessandro Trovarelli
Summary: The study indicates that bimetallic catalysts based on Cu/Fe supported over ZrO2 show high efficiency and sustainable activity for the mineralization of ibuprofen. The catalyst exhibits good activity over a wide pH range and extremely low metal leaching.
Article
Chemistry, Physical
Hongxin Ge, Nicolas Bibent, Keyla Teixeira Santos, Kavita Kumar, Julien Jaxel, Moulay-Tahar Sougrati, Andrea Zitolo, Marc Dupont, Frederic Lecoeur, Michel Mermoux, Vincent Martin, Laetitia Dubau, Frederic Jaouen, Frederic Maillard, Sandrine Berthon-Fabry
Summary: A series of Fe-NC aerogel catalysts were synthesized by modulating the nitrogen source and texture, and the importance of nitrogen sources in stabilizing Fe atoms and forming active sites was revealed. The mass activity of the catalysts exhibited a linear relationship with Fe content and reached 3.0 A g(-1) in 0.05 M H2SO4 and RDE setup. The performance in PEMFC showed the same tendency and was not affected by low mesopore volume.
Article
Materials Science, Multidisciplinary
Xinkuai He, Ruqing Guo, Qingtian Zou, Jingjing Yang, Zhousi Hu, Luye Wu
Summary: The co-deposition behavior of Co2 and Fe2 in ethylene glycol (EG) was investigated using cyclic voltammetry (CV) techniques. The results showed that Co2 species can accelerate the Co-Fe co-deposition, while Fe2 can inhibit the reduction of Co2. The microstructural and compositional characteristics of the samples revealed that Co-Fe deposits with different Fe content can be obtained. Additionally, the electrocatalytic activity of the Co-Fe coatings for hydrogen evolution reaction (HER) was studied, and it was found that the activity can be improved by increasing the Fe content.
Article
Energy & Fuels
Maria Cortazar, Jon Alvarez, Leire Olazar, Laura Santamaria, Gartzen Lopez, Heidi Isabel Villafan-Vidales, Asier Asueta, Martin Olazar
Summary: The performance of olivine, dolomite, and gamma-alumina primary catalysts was evaluated in continuous tar elimination process. Iron incorporation improved their catalytic activity, with Fe/Al2O3 exhibiting the highest conversion and stability.
Article
Chemistry, Analytical
Yu-Xin Yang, Qian-Nan He, Cong-Hui Xu, Rida Javed, Hongbin Zhao, Daixin Ye, Wei Zhao
Summary: In this study, heteroatom-doped single-atom catalysts (SACs) of Fe-N/P-C were synthesized for the catalysis of cathodic luminol electrochemiluminescence (ECL). The doping of phosphorus (P) could improve the catalytic efficiency of the oxygen reduction reaction (ORR) by lowering the reaction energy barrier. The catalysis of ORR by SACs triggered the generation of reactive oxygen species (ROS) and greatly enhanced the ECL emission. The Fe-N/P-C SACs exhibited higher catalytic activity compared to Fe-N-C SACs. The system's dependence on oxygen allowed for ultra-sensitive detection of antioxidants, such as ascorbic acid.
ANALYTICA CHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Sainan Zhou, Shoufu Cao, Shuxian Wei, Zhaojie Wang, Hongyu Chen, Xiaojing Lin, Xiaodong Chen, Siyuan Liu, Xiaoqing Lu
Summary: The study reveals that 3Cu-GY catalyst exhibits excellent performance in CO2RR, with high selectivity and low limiting potential. 3Fe-GY and 3Co-GY catalysts have significant advantages for high-reduction products. Hydrogen evolution reaction is severely inhibited, and CO2RR demonstrates overwhelming advantage over HER.
APPLIED MATERIALS TODAY
(2021)
Article
Nanoscience & Nanotechnology
Vladyslav V. Lisnyak, Alexander N. Zaderko, Ruslan Mariychuk, Volodymyr Lysenko, Olga Yu. Boldyrieva, Valeriy A. Skryshevsky, Gauhar Mussabek, Yerzhan Taurbayev, Nazym Zhylkybayeva, Oksana Yu. Tananiko
Summary: A novel sensing system for pH measurements was developed based on the enhanced and quenched photoluminescence and UV-Vis absorption of F-, O-, and N-containing carbon nanoparticles. The study characterized the structure and properties of these nanoparticles, and identified the pH response mechanism to be related to deprotonation of functional groups.
APPLIED NANOSCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Ruslan Mariychuk, Romana Smolkova, Viktoria Bartosova, Adriana Eliasova, Liudmyla M. Grishchenko, Vitaliy E. Diyuk, Vladyslav V. Lisnyak
Summary: This study successfully synthesized gold nanoparticles using Mentha piperita L. extract and found that the nanoparticles exhibited a response in the infrared range. The formation of the nanoparticles was influenced by both the extract and HAuCl4, resulting in nanoparticles of varying sizes and shapes.
APPLIED NANOSCIENCE
(2022)
Article
Electrochemistry
Anastasiia Kornii, Vladyslav V. Lisnyak, Liudmyla Grishchenko, Oksana Tananaiko
Summary: The morphological and voltammetric properties of carbon nanostructured screen-printed electrodes modified with Fe2O3 and carbon nanoparticles encapsulated into SiO2 film were studied. The modified electrodes showed enhanced stability and selectivity, and exhibited electrochemical activity toward dopamine and paracetamol. The best analytical characteristics were observed for the nanoSPCE-Fe2O3-nanoC-SiO2 electrodes. A differential pulse voltammetry method was developed for determining dopamine and paracetamol using these electrodes.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Liudmyla M. Grishchenko, Vladyslav A. Moiseienko, Andrii M. Goriachko, Anna V. Vakaliuk, Igor P. Matushko, Oleksandr Mischanchuk, Galyna G. Tsapyuk, Olga Yu Boldyrieva, Vladyslav V. Lisnyak
Summary: By sulfurating and oxidizing PAN carbon fibers, high thermal stability and sulfur content are achieved. The microwave absorption studies demonstrate a linear decrease in voltage standing wave ratio and attenuation through one adsorbent layer with increasing frequency, with transparency windows observed at 30 and 36 GHz. Furthermore, a 1000-fold attenuation of signal power is found at 30 GHz.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2023)
Article
Chemistry, Multidisciplinary
Andrii Yatsymyrskyi, Alla G. Dyachenko, Elena Ischenko, Tetiana M. Zakharova, Snizhana Gaidai, Vitaliy E. Diyuk, Vladyslav V. Lisnyak
Summary: In this study, the adsorption of carbon dioxide (CO2) on a hydrogenated nickel (111) surface was investigated using density functional theory (DFT). The formation of reaction intermediates, including [HC(OH)(2)], [COOH], [HCOO], and [C(OH)(2)], was observed. The results provide insights into CO2 adsorption on nanoscale nickel metals and can guide the development of efficient gas sensing materials.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2023)
Article
Chemistry, Multidisciplinary
Vitaliy E. Diyuk, Anna V. Vakaliuk, Galyna G. Tsapyuk, Andrii Yatsymyrskyi, Ruslan Mariychuk, Olga Yu Boldyrieva, Vladyslav V. Lisnyak
Summary: The catalytic decomposition of hydrogen peroxide using different nanoporous activated carbons (NACs) was studied. NAC catalysts produced from a macroporous vinyl pyridine resin showed the highest activity and can potentially be used in water treatment processes. The catalytic activity of NACs depends on the concentration of surface oxygen-containing groups. Oxidizing NACs with nitric acid solutions leads to a decrease in catalytic activity, but thermal treatment in argon can restore the activity.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2023)
Article
Chemistry, Multidisciplinary
Ruslan Mariychuk, Jozef Fejer, Rostyslav P. Linnik, Liudmyla M. Grishchenko, Vladyslav V. Lisnyak
Summary: Inspired by conventional ideas, the researchers successfully synthesized irregularly shaped gold nanoparticles (AuNPs) through green phytosynthesis using Juniperus communis L. extract as a bio-reductant. The characterized AuNPs showed blue-to-green photoluminescence and a broad plasmon signal, indicating contributions from AuNPs of different sizes and shapes. The phytosynthesized AuNPs are promising candidates for applications in biomedicine and morphology-dependent surface plasmon resonance sensors. This approach has the advantage of large-scale synthesis without the need for special conditions.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2023)
Article
Chemistry, Multidisciplinary
Alla Dyachenko, Olena Ischenko, Vitaliy Diyuk, Olena Goncharuk, Mykola Borysenko, Oleksandr Mischanchuk, Tetiana Zakharova, Olha Pryhunova, Dariush Sternik, Vladyslav Lisnyak
Summary: Silica-based nanocomposites with embedded metal oxides and metallic nanoparticles were prepared and showed high efficiency in catalytic CO2 hydrogenation to methane. The metal oxide modifiers increased the contribution of mesopores to the total porosity of the nanocomposites.
RESEARCH ON CHEMICAL INTERMEDIATES
(2022)
Article
Chemistry, Multidisciplinary
L. Yu Matzui, L. L. Vovchenko, O. A. Syvolozhskyi, O. S. Yakovenko, M. O. Borovoy, O. O. Gomon, A. G. Dyachenko, O. Ischenko, A. V. Vakaliuk, A. Bodnaruk, V. M. Kalita
Summary: The method of salt impregnation was used to grow magnetic alloy nanoparticles on multi-walled carbon nanotubes. The study confirmed that the nanoparticles formed granules on the surface of the nanotubes and exhibited magnetic properties consistent with a small single-domain assembly of spherical particles.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2023)
Article
Chemistry, Multidisciplinary
Vitaliy E. Diyuk, Anna V. Vakaliuk, Galyna G. Tsapyuk, Oleksandr V. Mischanchuk, Ruslan Mariychuk, Vladyslav V. Lisnyak
Summary: Phosphotungstic acid (PTA) was immobilized onto three types of nanoporous activated carbons (NACs), including oxidized, thermally treated, and pristine NACs. The resulting catalysts showed high diethyl ether yields and excellent selectivities for bioethanol dehydration, as well as high ethylene yields and selectivities in the conversion of bioethanol to ethylene.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2023)
Article
Quantum Science & Technology
V. Bartosova, R. Smolkova, L. M. Grishchenko, R. P. Linnik, V. V. Lisnyak, R. Mariychuk
Summary: A facile and environmentally friendly method was presented to synthesize gold nanoparticles (Au NPs) with infrared response. The structure and morphology of the Au NPs were investigated by transmission electron microscopy, which revealed diverse shapes such as spheres, triangles, and hexagons. The optical properties of the Au nanocolloids were studied by UV-visible absorption spectroscopy, indicating the presence of localized surface plasmon resonance (LSPR) peaks at 500...540 nm for small Au NPs and a redshift of the LSPR peak to the near-infrared region with increasing HAuCl4 concentration.
SEMICONDUCTOR PHYSICS QUANTUM ELECTRONICS & OPTOELECTRONICS
(2023)
Proceedings Paper
Nanoscience & Nanotechnology
V. E. Diyuk, L. M. Grishchenko, A. V. Vakaliuk, G. G. Tsapyuk, O. V. Mischanchuk, O. Yu. Boldyrieva, R. Mariychuk, V. V. Lisnyak
Summary: Nanoporous activated carbons (NACs) and activated carbon fibers (ACFs) have a high adsorption capacity for bromine due to their developed microporosity, while carbon black (CB) and multiwalled carbon nanotubes (MWCNTs) exhibit higher surface reactivity. The diffusion rate of bromine in the carbon porous structure determines the speed and completeness of the bromination process. Amination of brominated CMs can partially replace the bromine with amino groups. ACFs treated with bromine plasma have a high adsorption capacity for bromine, which can be converted into thermally stable acid SO3H groups. On these acid catalysts, 2-propanol can be converted to propene with 100% conversion at temperatures of 190-205 degrees Celsius.
NANOMATERIALS AND NANOCOMPOSITES, NANOSTRUCTURE SURFACES, AND THEIR APPLICATIONS, NANO2021
(2023)
Article
Chemistry, Multidisciplinary
A. G. Dyachenko, O. Ischenko, M. Borysenko, S. Gaidai, A. Yatsymyrskyi, G. G. Tsapyuk, O. Pryhunova, O. O. Kostyrko
Summary: Effective catalysts for CO2 hydrogenation to methane were prepared by impregnating aluminum oxide with cobalt and iron nitrates. Characterization analysis using XRD, SEM-EDX, argon physisorption, and TPD with mass-spectroscopy revealed that increasing the amount of Co-Fe active mass in the nanocomposite catalyst composition led to higher CO2 conversion and CH4 yield.
THEORETICAL AND EXPERIMENTAL CHEMISTRY
(2022)
