Article
Chemistry, Physical
Peerapol Pornsetmetakul, Sorasak Klinyod, Chadatip Rodaum, Saros Salakhum, Ploychanok Iadrat, Emiel J. M. Hensen, Chularat Wattanakit
Summary: By fine-tuning the texture of HZSM-5 catalysts and reducing the crystal size to ultra-thin nanosheet, high and stable ethylene yield can be achieved from ethanol dehydration.
Article
Crystallography
Changsheng Zhang, Kai Fan, Ge Ma, Chi Lei, Wei Xu, Jie Jiang, Bing Sun, Hongxing Zhang, Yunfeng Zhu, Song Wen
Summary: Hierarchically structured nanosized mesoporous ZSM-5 (SN-ZSM-5) zeolites were successfully synthesized without the use of mesoscale templates under highly concentrated conditions, showing improved catalytic performance in methanol-to-olefins (MTO) reactions with longer catalyst lifetime and higher propylene selectivity compared to conventional ZSM-5 zeolites. The etching effect of the highly alkaline environment was identified as a key factor in the formation of the hierarchical structure in SN-ZSM-5.
Article
Chemistry, Applied
Xiaofang Su, Bingyu Liu, Chaoqun Feng, Wei Wu
Summary: In this study, ZSM-5 zeolite nanosheet assemblies were rapidly synthesized using a microwave-assisted method. The resulting nanosheets exhibited excellent catalytic performance in the methanol-to-gasoline reaction due to the synergy of accessible acid sites and shorter diffusion paths.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Multidisciplinary
Mohammed A. Sanhoob, Abuzar Khan, Aniz Chennampilly Ummer
Summary: This study synthesized a series of ZSM-5 zeolites using the microwave-assisted crystallization method and analyzed their properties in detail. The results show that tetrapropyl ammonium hydroxide is the optimal organic structure-directing agent for achieving high crystallinity, suitable morphology, and ideal pore size. The catalyst with the highest crystallinity exhibited the best catalytic performance and stability in the methanol-to-olefin conversion reaction.
Article
Chemistry, Applied
Ye Yang, Lu Xu, Yuchao Lyu, Xinmei Liu, Zifeng Yan
Summary: Intergrowth zeolites combine advantages of single phases, with the SAPO-11/5 intergrowth zeolite showing intermediate surface acidity and pore volume by controlling the AFI/AEL ratio. The Ni/SAPO-11/5-2 bifunctional catalyst exhibits improved isomers selectivity and yield in n-hexane hydroisomerization, attributed to its unique pore structure and surface acidity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Applied
Giorgia Ferrarelli, Girolamo Giordano, Massimo Migliori
Summary: This paper presents a modified technique of epitaxial growth to produce core-shell catalysts coating microporous ZSM-5 with a layer of Silicalite-1. The aim is to passivate the surface acidity of ZSM-5 zeolite and improve its stability in methanol dehydration reaction to DME. The core-shell catalysts, synthetized using an as-made form core, exhibited interesting performances, resulting from a more controlled growth of the passivating layer.
Article
Chemistry, Physical
Sabarish Radoor, Jasila Karayil, Aswathy Jayakumar, Jyotishkumar Parameswaranpillai, Suchart Siengchin
Summary: Mesoporous ZSM-5 zeolite has high adsorption capacity and stable regeneration ability, showing potential as an efficient adsorbent for organic contaminants. Its porous structure can be synthesized using cellulose, and it exhibits high removal efficiency for dyes like methyl orange.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Hongchao Liu, Wenliang Zhu, Xudong Fang, Shichao Peng, Mingguan Xie, Zhaopeng Liu, Zhiyang Chen, Mao Ye, Zhongmin Liu
Summary: This study experimentally demonstrates the synergistic effect of external acidity and surface barriers in the catalytic synthesis of aromatics. The selectivity of products is controlled by external acidity, while the lifetime of the catalyst is controlled by surface barriers. By simultaneously passivating the external acidic sites and reducing the surface barriers, the BTX selectivity was enhanced by 133% and the catalyst lifetime was prolonged.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Applied
Mahashanon Arumugam, Ka-Lun Wong, Arjun Nadarajan, Sin Yuan Lai, Chee Keong Goh, Sugeng Triwahyono, Yun Hin Taufiq-Yap
Summary: Micellization of zeolite precursor seeds with surface passivating organosilane groups is an effective technique to reduce crystallite aggregation and produce hierarchically porous materials with additional mesopores. By changing the synthesis environment of the surface passivation process, the average particle size and pore architecture of the zeolite can be altered. Using low hazard organic solvents with different hydrophobicities as a matrix for surface organosilanization and crystallization processes has shown promising results in this study.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Rui Feng, Bao Liu, Peng Zhou, Xinlong Yan, Xiaoyan Hu, Min Zhou, Zifeng Yan
Summary: The preparation of ZSM-5 samples using a two-stage crystallization method in the presence of glucose and additional post-treatment can improve catalytic performance and product selectivity. Nanosized ZSM-5 catalysts enriched in Al pairs at channel intersections exhibit higher aromatics and ethylene selectivity, while microsized ZSM-5 catalysts with multiple single Al sites show higher propylene selectivity.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Applied
Cristina Pizzolitto, Elena Ghedini, Somayeh Taghavi, Federica Menegazzo, Giuseppe Cruciani, Markus Peurla, Kari Eranen, Ivo Heinmaa, Atte Aho, Narendra Kumar, Dmitry Yu Murzin, Tapio Salmi, Michela Signoretto
Summary: The study focuses on improving the acidity of silica alumina composite using SBA-15, with modifications to enhance Lewis and Bronsted acidities, and introduction of alumina as a co-catalyst. The balanced acidities and proper porosity of the modified SBA-15 led to efficient performance in converting glucose to levulinic acid.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Applied
Yueqi Wu, Jiangping Long, Sheng Wei, Yating Gao, Dan Yang, Yihu Dai, Yanhui Yang
Summary: The propane dehydrogenation (PDH) performance of non-noble metal Co-based catalysts can be improved with modified Ti-ZSM-5 zeolites as supports. The enhanced performance is attributed to the tuned state of active Co species and surface acid property due to Ti species. The developed Co/Ti-ZSM-5 catalysts exhibit high selectivity and regeneration stability in recycling PDH reactions. By decreasing the Si/Ti ratio of Ti-ZSM-5 zeolites, the Co sites at different interfaces can be tailored, leading to structural evolution of Ti and improved dispersion and chemical state of the Co sites. Additionally, the high Si/Ti ratio in Ti-ZSM-5 zeolites reduces surface acidity, facilitating C3H6 desorption and enhancing selectivity and anti-coke stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Fengqiu Chen, Jing Hao, Yueyang Yu, Dang-guo Cheng, Xiaoli Zhan
Summary: Hierarchical ZSM-5 zeolites with similar porous structures but different external acid strength were prepared through chemical vapor deposition (CVD) method. The results show that the external environment and micropores have different catalytic roles, and the weakening of acid strength is beneficial for suppressing specific reactions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Engineering, Environmental
Gabriela Grzybek, Magdalena Greluk, Piotr Patulski, Pawel Stelmachowski, Karolina Tarach, Grzegorz Slowik, Marek Rotko, Susana Valencia, Fernando Rey, Kinga Gora-Marek
Summary: The focus of the ongoing global energy transformation is on hydrogen production in the ethanol steam reforming (ESR) process. Researchers have successfully developed a cobalt catalyst based on the ZSM-5 zeolite support, and analyzed its performance using various physicochemical characterization methods and real-time UV-Vis and FT-IR spectroscopy studies in the ESR conditions. The influence of potassium introduction and the impact of zeolite acidity on the cobalt phase oxidation state were also investigated. The study results challenge the existing paradigm of low activity and stability of zeolite-based ESR catalysts, and provide hope for the development of competitive catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Qiyan Wang, Sara Santos, Cesar A. Urbina-Blanco, Wenjuan Zhou, Yong Yang, Maya Marinova, Svetlana Heyte, Thuriot-Roukos Joelle, Ovidiu Ersen, Walid Baaziz, Olga Safonova, Mark Saeys, Vitaly V. Ordomsky
Summary: Catalytic processes in water are more environmentally friendly, cost-effective, and less toxic than those in organic solvents. A novel solid micellar Ru catalyst (Ru(III)@MCM) has been proposed for selective aqueous phase hydrogenation of carbonyl groups, showing exceptional selectivity, activity, and stability compared to conventional metallic catalysts. DFT modeling suggests that the reaction proceeds via heterolytic dissociation of hydrogen, forming a Ru-Hydride species, and subsequent hydride transfer to the carbonyl group, with water playing a key role in avoiding product inhibition.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Environmental Sciences
Leticia Reggiane de Carvalho Costa, Liliana Amaral Feris
Summary: COVID-19 is a global health threat that spreads primarily through respiratory droplets and contact with aerosol-infected surfaces. The virus has also been detected in aqueous matrices, and ozone treatment shows promising results in inactivating viruses and bacteria, ensuring water safety and protecting human health from exposure.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Sara Navarro-Jaen, Mirella Virginie, Joelle Thuriot-Roukos, Robert Wojcieszak, Andrei Y. Khodakov
Summary: This study found that copper dispersion was higher and CO2 conversion rate was greater on alumina and zirconia supported catalysts, followed by ceria supported catalysts. The CO2 hydrogenation process appears to be mainly influenced by the higher copper dispersion and to a lesser extent by the concentration of Bronsted acid sites in the catalysts studied. Due to lower reverse water gas-shift activity, the alumina supported catalyst showed a higher dimethyl ether yield compared to the zirconia and ceria supported catalysts.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Tianyu Gao, Zhen Yan, Vitaly Ordomsky, Sebastien Paul
Summary: Covalent organic frameworks (COFs) are a rapidly developing field in material chemistry. In this work, a method for synthesizing crystalline composite based on phosphotungstic acid and 2D imine COF is demonstrated, which shows high activity and stability.
Article
Chemistry, Multidisciplinary
Chunyang Dong, Maya Marinova, Karima Ben Tayeb, Olga V. Safonova, Yong Zhou, Di Hu, Sergei Chernyak, Massimo Corda, Jeremie Zaffran, Andrei Y. Khodakov, Vitaly V. Ordomsky
Summary: A new photocatalytic reaction route using water as the sole external oxygen source was developed to synthesize acetic acid from CH4 and CO at room temperature. The optimized photocatalyst, consisting of a TiO2 support and Pt1 anchored ammonium phosphotungstic polyoxometalate (NPW) clusters, achieved a stable synthesis of acetic acid with high selectivity and a high production rate.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Di Hu, Ahmed Addad, Karima Ben Tayeb, Vitaly V. Ordomsky, Andrei Y. Khodakov
Summary: Direct conversion of methane into formic acid using photocatalysis is achieved by adding a thermocatalyst in a one-pot reactor. The methane is selectively converted into a mixture of C1 oxygenates using a cesium salt of phosphotungstic acid on titania photocatalyst, and then the oxygenates are selectively converted into formic acid using an alumina-supported ruthenium catalyst. A selectivity to formic acid of 85% and a productivity of 5 mmol g-1 photocatalyst are achieved at room temperature.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Chemistry, Physical
Chunyang Dong, Di Hu, Karima Ben Tayeb, Pardis Simon, Ahmed Addad, Martine Trentesaux, Danilo Oliveira de Souza, Sergei Chernyak, Deizi V. Peron, Amelle Rebai, Jean-Francois Guillemoles, Xavier Wallart, Bruno Grandidier, Andrei Y. Khodakov, Negar Naghavi, Vitaly V. Ordomsky
Summary: Selective methane photocatalytic oxidation to CO and H2 at ambient conditions is a main challenge in the chemical industry. In this study, conventional Cu (In,Ga)Se2 (CIGS) absorbers used in solar cells were found to be excellent candidates for methane valorization. A thin film of CIGS coated over Mo demonstrated exceptional performance in methane partial oxidation to CO and H2, with a stable CO productivity of 2.4 mmol per gram of CIGS and a selectivity to CO of over 80%.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Gaje Singh, Deepak Khurana, Tuhin S. Khan, Indrajit K. Ghosh, Biswajit Chowdhury, Andrei Y. Khodakov, Ankur Bordoloi
Summary: Mn-promoted Na-CuFeO2 catalysts were prepared and explored for CO2 hydrogenation to short-chain olefins. The addition of Mn significantly limited C5+ hydrocarbon formation and improved the selectivity of short-chain olefins. Among the catalysts, 2.5% Mn/Na-CuFeO2 showed excellent performance with high CO2 conversion and selectivity towards C2-C4 olefins.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Anderson J. Schwanke, Wesley Monteiro, Leticia G. da Trindade, Elson Longo, Katia Bernardo-Gusmao, Michele O. de Souza
Summary: Microporous and mesoporous nanocomposites based on silica and titanate were synthesized by unrolling sodic titanate nanotubes and introducing surfactant species and silica species between the unrolled titanate nanotubes. The resulting nanoarchitectures exhibit higher specific surface areas and improved adsorption capacities compared to the pristine titanate nanotubes. Kinetic and isotherm analyses indicate that the adsorption process follows pseudo-second-order kinetics and occurs through multilayer adsorption onto the nanocomposites, rather than onto uniform sites.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Engineering, Environmental
Leticia Reggiane de Carvalho Costa, Ana Beatriz da Luz Arsufi, Julia Toffoli de Oliveira, Liliana Amaral Feris
Summary: Pharmaceuticals in water are not fully degraded by traditional treatment processes. Advanced oxidative processes (AOPs) can promote their mineralization. This study evaluated the mineralization capacity of caffeine and ampicillin through ozonation. At pH 8 and an applied ozone dosage of 830 mg.L-1, the removal rates of caffeine and ampicillin were 100% and 99.7% respectively, with a mineralization rate of 30.8%.
OZONE-SCIENCE & ENGINEERING
(2023)
Article
Chemistry, Physical
Yong Zhou, Martine Trentesaux, Maya Marinova, Sergei Chernyak, Jean-Charles Morin, Melanie Dubois, Samuel Eyley, Wim Thielemans, Vlad Martin-Diaconescu, Andrei Khodakov, Jeremie Zaffran, Vitaly Ordomsky
Summary: In conventional bifunctional catalysts, active metal sites are associated with metal components, while acid sites are usually localized over oxide supports. The modification of metal sites by halogens provides an opportunity to generate acidity via the heterolytic dissociation of hydrogen directly over metal sites. High-throughput screening of different metal-halogen combinations reveals that only Pd and Pt catalysts demonstrate the formation of acid sites by interaction with Br, Cl, and I. Characterization and density functional theory (DFT) modeling suggest that hydrogen heterolytic dissociation occurs over halogens localized at the edges and corners of Pd and Pt nanoparticles, with the strength of the acid sites increasing with the electronegativity of the halogen.
Article
Chemistry, Physical
Yong Zhou, Martine Trentesaux, Maya Marinova, Sergei Chernyak, Jean-Charles Morin, Melanie Dubois, Samuel Eyley, Wim Thielemans, Vlad Martin-Diaconescu, Andrei Khodakov, Jeremie Zaffran, Vitaly Ordomsky
Summary: In conventional bifunctional catalysts, metal sites are responsible for catalytic activity, while acid sites are typically located on oxide supports. This study investigates the modification of metal sites with halogens to generate acidity through the heterolytic dissociation of hydrogen. High-throughput screening of different combinations of metals (Co, Ni, Ru, Pt, Pd, Rh) and halogens (Cl, Br, I) reveals that only Pd and Pt catalysts can form acid sites through interaction with Br, Cl, and I. Characterization and density functional theory (DFT) modeling suggest that hydrogen undergoes heterolytic dissociation over halogens located at the edges and corners of Pd and Pt nanoparticles, with the strength of the acid sites increasing with the electronegativity of the halogen.
Review
Chemistry, Multidisciplinary
Sergei A. Chernyak, Massimo Corda, Jean-Pierre Dath, Vitaly V. Ordomsky, Andrei Y. Khodakov
Summary: This review highlights the recent trends in light olefin synthesis, compares different synthetic routes, and analyzes various quantitative characteristics. Methanol-to-olefins, alkane direct or oxidative dehydrogenation technologies have great potential in the short term, while methanol-mediated CO and CO2 direct hydrogenation and electrocatalytic reduction of CO2 are long-term directions. The application of modern concepts can lead to more environmentally friendly, energy efficient and selective large-scale technologies for light olefin synthesis in the near future.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Dan Wu, Dandan Han, Yong Zhou, Zhen Zhang, Hang Qian, Qian Zhou, Yongsheng Zhang, Andrei Y. Khodakov, Vitaly V. Ordomsky
Summary: COF-LZU1 with nanotube-like morphology was synthesized with the presence of trimesic acid as a template, exhibiting high crystallinity and pore volume. The as-synthesized COF nanotubes consist of stacked plates with a diameter of about 100 nm, containing a hollow channel with a diameter of about 20 nm.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Applied
Lulu Wan, Gan Ye, Yuying Chang, Zhaohan Yang, Guangming Shi, Qiuli Zhang, Jin Wang
Summary: This study developed an efficient approach to upgrade the oxidative desulfurization (ODS) performance of Zr-MOFs with proton stimulation. Experimental results showed that the introduction of protons can significantly improve the ODS efficiency. This work provides a facile and efficient strategy for enhancing the ODS performance of pristine MOFs.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Qiqi Lu, Xiu-Zhi Wei, Qi Zhang, Xinghua Zhang, Lungang Chen, Jianguo Liu, Yubao Chen, Longlong Ma
Summary: The application of Pd-M bimetallic clusters in the selective hydrogenation reaction was investigated, and the Pd0.6Ni@S-1 catalyst was found to exhibit high selectivity in the conversion of phenylacetylene to styrene. The confinement effect of zeolite inhibited over-hydrogenation and improved the stability of the catalysts. Furthermore, the solvent properties also influenced the product distribution.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Review
Chemistry, Applied
Bo Li, Lumin Hong, Changdi Jing, Xianyang Yue, Huabo Huang, Qianqian Jiang, Jianguo Tang
Summary: MOF materials with adjustable pore structure and polymetallic sites have been explored as electrocatalysts for OER. Bimetallic materials show higher electrocatalytic activity than monometallic materials, while carbon-coated and doped MOF catalysts exhibit stable and good OER activity. The synergistic interaction between polymetallic active sites effectively improves the intrinsic activity of MOF on OER.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shichun Gu, Ruyi Wang, Junxiong Zhang, Hairong Dong, Liping Deng, Xue Wang, Yapeng He
Summary: In this study, monodispersed hollow mesoporous organosilica nanospheres with controlled core cavity and mesoporous shell were successfully synthesized. These hollow nanospheres showed a high adsorption capacity for Pb2+ in water solution and exhibited acceptable recycling and stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Lucie Havelkova, Bogdana Bashta, Michaela Vankova, Jiri Zednik, Jiri Brus, Jan Svoboda, Alice Vagenknechtova, Jan Sedlacek
Summary: An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with a permanent micro/mesoporous texture and a BET area of up to 1062 m2/g is reported. The homopolymerization is highly compatible with the heteroatom groups of the monomers and allows the preparation of well-defined porous networks with a wide spectrum of univalent groups.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shirui Pang, Yuxin Liu, Zhe Zhang, Yuxin Li, Chunguang Li, Zhan Shi, Shouhua Feng
Summary: This study focuses on using a functional separator to suppress the shuttle effect of soluble lithium polysulfides in Li-S batteries. It is found that the functionalized sulfonic acid group not only accelerates the conduction of lithium ions, but also repels polysulfide anions through electrostatic interactions. The performance of the batteries is significantly improved with the use of this functionalized separator.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Pingping Li, Lei Han, Donghun Kim, Kemal Celebi
Summary: This study presents a fast synthetic strategy for the preparation of high-quality platelike MFI crystals using a thin-wall tubular reactor. The strategy is efficient, time-saving, and can be optimized, making it applicable to the preparation and optimization of other important materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Haitao Yin, Wei Wang, Yuxin Li, Hu Wen, Shuang Chen, Nanzhe Jiang
Summary: This study presents a template-free and solid-state-like crystallisation method for the synthesis of ZSM-5 zeolite, which can be scaled-up in production. Mechanical mixing of starting material components improves the dispersion of materials, leading to ZSM-5 zeolite with high crystallinity and size uniformity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Congli Li, Jiang Wang, Zhenfei Wang, Jinxiang Dong, Qi Shi
Summary: This study investigates the evolution and autoreduction behavior of Cu species in CuCl/NaY adsorbent during vacuum thermal activation. It is found that Cu species migrate from supercages to the nearby plane of the six-membered ring connecting the supercage and sod cage during vacuum activation. At 150 degrees C, vacuum autoreduction occurs, resulting in the formation of Cu+Cl- species. The results provide reference for the preparation of pi-complex adsorbents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Irena Khatrin, Iman Abdullah, Alan J. Mccue, Yuni K. Krisnandi
Summary: Hierarchical porous system with two types of mesopores provides a solution to the diffusion limitation in conventional zeolites. Cobalt oxide impregnated hierarchical ZSM-5 zeolite samples with intra- and inter-crystalline mesopores were synthesized using two different strategies. The physicochemical properties of the modified catalysts were analyzed, revealing distinct features given by the two mesoporous configurations. Catalytic activity analysis showed that Co-oxide/ZSM-5 with inter-crystalline mesopores exhibited higher activity in methane partial oxidation reaction compared to Co-oxide/ZSM-5 with intra-crystalline mesopores.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Nataliia Reinders, Martin Durovic, Pavla Honcova, Zaneta Dohnalova, Jana Luxova, Stanislav Slang, Jhonatan Rodriguez-Pereira, Petra S. Sulcova
Summary: This study presents a new method for preparing a microporous Ni2P/C catalyst with high catalytic activity. The redox reaction and carbon matrix formation during high-temperature treatment contribute to the stability and activity of the catalyst. Experimental and analytical results suggest that the microporous structure of the composite plays a crucial role in its catalytic performance. These findings are important for practical applications of efficient hydrogen production by water electrolysis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Ana Raquel Bertao, Viktoriya Ivasiv, Cristina Almeida-Aguiar, Patricia R. Correia, Antonio M. Fonseca, Manuel Banobre-Lopez, Fatima Baltazar, Isabel C. Neves
Summary: This study developed a zeolite-based delivery system (ZDS) using silver and 5-Fluorouracil as antimicrobial and antineoplastic agents. The ZDS was characterized and its antimicrobial properties were investigated, showing better antibacterial effectiveness for the ZDS containing both silver and 5-FU.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Naonobu Katada, Nobuki Ozawa, Etsushi Tsuji, Keigo Kanehara, Akiho Otsuka, Taiga Sakamoto, Kirari Umezawa, Hitoshi Matsubara, Satoshi Suganuma, Momoji Kubo
Summary: First principles calculations were used to investigate the pathway for methylation of benzene with methane catalyzed by MFI type zeolite-supported Co species. The strong adsorption of benzene on Co is found to lower the activation energy for methane dissociation and promote the formation of toluene precursor. The activation energy of methane dissociation is also affected by the Al-Al distance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Yuan Liu, An T. Ta, Kyoung Chul Park, Shenyang Hu, Natalia B. Shustova, Simon R. Phillpot
Summary: We use density functional theory to investigate the interactions of cerium, americium, and curium cations with crown ethers. Our results demonstrate that crown ethers can capture cerium, americium, and curium ions, and modifying the crown ether structure by substituting nitrogen atoms for oxygen atoms significantly increases their binding energies with radionuclides.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Zhengwu Peng, Shixing Wang, Yihui Wu, Xiang Liu, Hongliang Liu, Dekun Zhang, Likang Fu
Summary: An efficient adsorbent for recovery of germanium was prepared and characterized in this study. The adsorption behavior of Ge(IV) on the adsorbent was analyzed, and the results showed that it follows pseudo-secondary kinetic model and Langmuir isotherm model. The adsorbent exhibited good anionic anti-interference ability and can still maintain high adsorption efficiency after repeated adsorption.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
