Article
Chemistry, Physical
Zhili Wang, Weifeng Chu, Zhenchao Zhao, Zhengmao Liu, Hongyu Chen, Dong Xiao, Ke Gong, Fan Li, Xiujie Li, Guangjin Hou
Summary: This study comprehensively investigated the roles of different SDAs in selective Al substitution in MCM-49 zeolite using multinuclear solid-state NMR. The results showed that different SDAs have distinct impacts on Al distributions in the zeolite structure, with varying levels of T-2, T-6, and T-7 Al observed depending on the type of SDA used.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Correction
Chemistry, Multidisciplinary
Sebastian Greiser, Gregor J. G. Gluth, Patrick Sturm, Christian Jaeger
Summary: In this study, the authors investigated the cementitious sodium aluminosilicate gels (geopolymers) and gel-zeolite composites using double-resonance NMR spectroscopy, and corrected the relationships between Si-29{Al-27}, Al-27{Si-29}, and Al-27{H-1}.
Article
Chemistry, Physical
Rahul Jay, Ankur L. Jadhav, Leo W. Gordon, Robert J. Messinger
Summary: Rechargeable aluminum-sulfur (Al-S) batteries have attracted significant attention due to their low cost, earth abundance, safety, and high theoretical capacity. However, the significant capacity fade of the sulfur electrode caused by the formation of electrolyte-soluble reaction intermediates remains a challenge. This study investigates Al-S cells using chloroaluminate-containing ionic liquid electrolytes and reveals the coordination of electrolyte-soluble sulfide species with complex electroactive species, which affects the reversibility and electrochemical properties of multivalent metal-sulfur batteries.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Applied
Maria Pilar Cumplido, Maria Jose Diaz-Cabanas
Summary: ITQ-34 zeolite is a promising catalyst with a three-dimensional mesoporous structure for FCC process. This study successfully synthesized aluminum-rich ITQ-34 zeolite, addressing the issues of low germanium content and blockage of channels by phosphate compounds. The aluminum ITQ-34 zeolite exhibits excellent catalytic performance in propylene production.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chen Lei, Andreas Erlebach, Federico Brivio, Lukas Grajciar, Zdenek Tosner, Christopher J. Heard, Petr Nachtigall
Summary: Solid state (ss-) Al-27 NMR is a valuable tool for characterizing zeolites, but its interpretation is complex and aluminum distributions are difficult to determine. Computational modeling has become popular to support experimental characterization, but simplifying assumptions are often made without justification. This study evaluates the effects of different models on the prediction of Al-27 NMR chemical shifts in zeolites and highlights the importance of operando modeling and considering factors like water loading, temperature, and cation characteristics. Machine learning regression is used to develop a relationship between chemical shifts and structural parameters, allowing for accurate prediction from dynamic simulations.
Article
Chemistry, Multidisciplinary
Jeffery L. White, Kuizhi Chen, Anya Zornes, Vy Nguyen, Bin Wang, Zhehong Gan, Steven P. Crossley
Summary: This study reveals the presence of at least two types of paired active sites in zeolite catalysts through NMR experiments, and finds that these paired sites play a crucial role in reactivity. Additionally, it is observed that synthetic and postsynthetic modifications affect the quantity and arrangement of these paired sites.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Inorganic & Nuclear
Benhan Fan, Dali Zhu, Linying Wang, Shutao Xu, Yingxu Wei, Zhongmin Liu
Summary: The water-induced dealumination mechanism of zeolites under hydrothermal conditions was investigated. It was found that the hydrolysis of the Al-O bond by water molecules caused dealumination. The hydrolysis generated framework-associated Al species and extra-framework aluminum (EFAL) species that stabilized the zeolite framework through electrostatic interaction with the Bronsted acid sites (BASs).
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Materials Science, Ceramics
Natalie Smith-Gray, Nicholas Stone-Weiss, Sam Karcher, Jonathan Evarts, Jessica Sly, John Bussey, John McCloy
Summary: During vitrification, the presence of sulfur can lead to the formation of detrimental sulfur-containing salt phases in the melter. This study explored the effects of different compositions and additives on sulfur solubility. It was found that the addition of sulfur resulted in the formation of crystalline Cr2O3 and a separate salt phase called Na2(S,Cr)O4.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Jun Xu, Yanxin Liu, Yining Huang
Summary: The ultrafast crystallization of AlPO4-5 molecular sieve in a deep eutectic solvent was observed, with fluoride ions accelerating the process and influencing the crystal symmetry. This study provides a new approach to control the crystal structure of molecular sieves.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Applied
Haojie Li, Xiaozhe Hou, Ling Zhang, Ying Wei, Yan Liang, Junjun Qiao, Haohao Su, Xibing Gao, Jingbo Jia, Runduo Zhang
Summary: An extra-large-pore aluminogermanosilicate zeolite IRR with interconnected 18 x 12 x 12-ring channels was prepared using a new alkyl-immidazolium template. The zeolite exhibited excellent microporosity and strong acidity after calcination, making it suitable for catalytic reactions. The catalytic activity of IRR zeolite was found to be the highest for bulky substrate diphenylacetaldehyde, due to its open channel system and presence of active acidic sites.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Materials Science, Ceramics
Guillaume Rousseau, Lionel Montagne, Francois O. Mear
Summary: A study of high temperature degradation of aluminum metaphosphate Al(PO3)3 was conducted. The preparation involved heating an Al(H2PO4)3 solution at 700 degrees C. Structural data were obtained through NMR spectroscopy, showing the formation of two allotropic forms during the preparation process.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Zhiping Xiong, Guodong Qi, Luyi Bai, Ensheng Zhan, Yueying Chu, Jun Xu, Na Ta, Aijing Hao, Feng Deng, Wenjie Shen
Summary: Hydrothermal synthesis of ZSM-35 using dioxane as the structure-directing agent resulted in the majority of aluminum atoms located at the T4 site, generating efficient Brønsted acid sites for the carbonylation of dimethyl ether.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Dmitry E. E. Tsaplin, Vera A. A. Ostroumova, Leonid A. A. Kulikov, Anna V. V. Zolotukhina, Alexey A. A. Sadovnikov, Michail D. D. Kryuchkov, Sergey V. V. Egazaryants, Anton L. L. Maksimov, Kaige Wang, Zhongyang Luo, Evgeny R. R. Naranov
Summary: In this study, the textural, structural, morphological, and acidic properties of TiO2/Al-ZSM-12 zeolite synthesized via the hydrothermal method were investigated. Various methods such as XRD, low-temperature nitrogen adsorption-desorption, spectroscopy, and solid-state NMR were used to characterize the materials. It was found that TiO2/Al-ZSM-12 zeolite exhibited higher acidity and catalytic activity compared to the unsubstituted zeolite Al-ZSM-12.
Article
Chemistry, Multidisciplinary
Wei Zhou, Naoki Ogiwara, Zhewei Weng, Congcong Zhao, Likai Yan, Yuji Kikukawa, Sayaka Uchida
Summary: This study presents the first example of a vanadium-substituted delta-Keggin Al-13-based porous Ionic crystal (PIC), which exhibits Lewis acidity. The Lewis acidity was confirmed through acetalization reaction using Al28V4-PW9V3 as a solid catalyst and investigating with pyridine or 2,6-lutidine as basic probe molecules.
CHEMICAL COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Yan Wang, Sai Li, Yanchao Liu, Jiajun Zheng, Xiaobo Sun, Yanze Du, Zhiping Liu, Bo Qin, Wenlin Li, Guangshuai Wang, Meng Pan, Ruifeng Li
Summary: Hierarchical ZSM-5 catalyst synthesized by traditional hydrothermal method exhibits prolonged catalysis life and excellent catalytic performance, attributed to the shortened diffusion path and autogenetic carbon nanotubes.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Editorial Material
Chemistry, Physical
Johannes Lercher, Harold Kung, In-Sik Nam, Rafael Lucques, James Spivey
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Linxiao Chen, Yifeng Zhu, Laura C. Meyer, Lillian Hale, Thuy T. Le, Abhi Karkamkar, Johannes A. Lercher, Oliver Y. Gutierrez, Janos Szanyi
Summary: Hydrogenolysis of polypropylene (PP) and polyethylene (PE) can convert these plastics into smaller hydrocarbons. Among transition metals, ruthenium (Ru) is the most effective in producing C1-C38 alkane mixtures. The branching degree of the products depends on the position of the C-C cleavage and can be tuned by the pressure of H2.
REACTION CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Julian Schmid, Meng Wang, Oliver Y. Gutierrez, R. Morris Bullock, Donald M. Camaioni, Johannes A. Lercher
Summary: Hydrogenolysis and hydrolysis of aryl ethers in the liquid phase are important reactions for accessing functionalized cyclic compounds from renewable feedstocks. The mechanisms and selectivity of hydrogenolysis are influenced by the metal catalyst and temperature, and the selectivity can be controlled by adjusting the reaction conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Lei Tao, Insu Lee, Rachit Khare, Andreas Jentys, John L. Fulton, Maricruz Sanchez-Sanchez, Johannes A. Lercher
Summary: Cu-oxo nanoclusters in Cu-exchanged ferrierite act as active sites for the oxidation of methane to methanol via a three-step process. These active sites are dimeric Cu clusters stabilized at pairs of negatively charged aluminum oxygen tetrahedra.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Didier Astruc, Guy Bertrand, Mohamed Eddaoudi, Yu Han, Kuo-Wei Huang, Johannes Lercher, Catherine Santini, Kazuhiro Takanabe, Mostafa Taoufik, Luigi Cavallo
Summary: This article discusses the contributions of Jean-Marie Basset in the field of catalysis. He introduced the approach of molecular organometallic chemistry to the study of supported catalysts, established the field of surface organometallic chemistry, and significantly improved numerous known reactions while also discovering new ones.
Article
Chemistry, Multidisciplinary
Lingli Ni, Rachit Khare, Ricardo Bermejo-Deval, Ruixue Zhao, Lei Tao, Yue Liu, Johannes A. Lercher
Summary: A highly selective Ga-modified zeolite BEA has been successfully synthesized for propane dehydrogenation. The propane dehydrogenation rate is determined by different factors under different conditions. The active sites are identified as dehydrated and tetrahedrally coordinated Ga3+, and the selectivity towards aromatics is low.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Qiang Liu, Niklas Pfriem, Guanhua Cheng, Eszter Barath, Yue Liu, Johannes A. Lercher
Summary: The ionic environment inside microporous zeolites can significantly affect the catalytic turnover rates by modifying the chemical potential of the reactants and transition states. However, zeolites with high ionic strength seem to have a limit to the rate enhancement for the aqueous-phase dehydration of alcohols. This limitation is hypothesized to be caused by spatial constraints in the pores, such as size exclusion effects. This study demonstrates that the increase in turnover rate, the formation of a maximum, and the subsequent rate drop are intrinsic consequences of the increasingly dense ionic environment in zeolite.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Jian Zheng, Laura Loebbert, Saumil Chheda, Navneet Khetrapal, Julian Schmid, Carlo Alberto Gaggioli, Benjamin Yeh, Ricardo Bermejo-Deval, Radha Kishan Motkuri, Mahalingam Balasubramanian, John L. Fulton, Oliver Y. Gutierrez, J. Ilja Siepmann, Matthew Neurock, Laura Gagliardi, Johannes A. Lercher
Summary: Homotopic sites are ideal for mechanistic studies and optimal control of catalytic transformations. Nickel cations in different environments show different selectivity in the reaction of 1-butene, and the reaction mechanism follows the Cossee-Arlman mechanism.
JOURNAL OF CATALYSIS
(2022)
Article
Engineering, Chemical
Hussein Rasool Abid, Alireza Keshavarz, Johannes Lercher, Stefan Iglauer
Summary: This research develops an advanced material that has high efficiency in hydrogen storage and separation from CO2 streams. The material can store a large amount of hydrogen and achieve efficient H2-CO2 separation in industrial production. This study provides cost-effective and technically efficient materials for the industrial-scale implementation of a hydrogen economy.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Iris K. M. Yu, Fuli Deng, Xi Chen, Guanhua Cheng, Yue Liu, Wei Zhang, Johannes A. Lercher
Summary: This study investigates the influence of hydronium ions on the rate constant in aqueous-phase Pd-catalyzed furfural hydrogenation reactions. The results indicate that the strength of hydrogen binding on Pd is a decisive factor in the hydrogenation kinetics, while furfural adsorption on Pd is not affected by pH.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Ruixue Zhao, Rachit Khare, Yang Zhang, Maricruz Sanchez-Sanchez, Ricardo Bermejo-Deval, Yue Liu, Johannes A. Lercher
Summary: Steric confinement in zeolites affects the catalytic conversion of alkanes. Silica species grafted near Bronsted acid sites in H-ZSM-5 zeolite enhance the binding of bases and increase the reaction rate of protolytic cracking of n-pentane with a lower activation energy. The presence of extra-framework silica leads to an earlier transition state and better stabilization of carbonium ions compared to extra-framework alumina.
Article
Multidisciplinary Sciences
Wei Zhang, Sungmin Kim, Lennart Wahl, Rachit Khare, Lillian Hale, Jianzhi Hu, Donald M. Camaioni, Oliver Y. Gutierrez, Yue Liu, Johannes A. Lercher
Summary: We propose a unique approach to selectively upcycle polyolefin waste by utilizing a highly ionic reaction environment, which increases polymer reactivity and reduces energy required for breaking carbon-carbon bonds. By catalyzing endothermic cleavage and exothermic alkylation reactions, we are able to convert polyethylene and polypropylene to liquid isoalkanes at temperatures below 100 degrees C. This process offers a high yield conversion of unprocessed postconsumer items into high-quality liquid alkanes.
Article
Chemistry, Physical
Yong Wang, Xiaofeng Chen, Hui Shi, Johannes A. Lercher
Summary: Metal oxides of group 4-6 elements are found to be active and stable catalysts for H2S reforming of methane, with dynamical binding of sulfur species (S*) to metal cations as the key active sites. Analysis of kinetic data and isotopic substitution effects reveals that S*-mediated C-H bond cleavage is the most plausible rate-limiting step common for all catalysts, with subtle yet essential differences in the thermodynamic stability of S* between 3d and 4d/5d catalysts.
Article
Chemistry, Applied
Feng Chen, Sungmin Kim, Dushyant Barpaga, John. L. L. Fulton, Radha Kishan Motkuri, Oliver. Y. Y. Gutierrez, Donald. M. M. Camaioni, Johannes. A. A. Lercher
Summary: Bronsted-acid sites are introduced on the ZrO2 nodes of UiO-66 MOFs via -OSO3H groups. These sites exhibit strong Bronsted acidity and are active for cyclohexanol and ethanol dehydration reactions in different phases. The activity of Bronsted acid sites at nodes is improved by increasing sulfur concentration, which leads to the formation of two interacting groups [(&mu(3)-OSO3H)(2)] through hydrogen bonding. The catalytic activity can be manipulated by functionalizing zirconia nodes of the MOF framework.
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Physical
Benjamin Yeh, Saumil Chheda, Jian Zheng, Julian Schmid, Laura Loebbert, Ricardo Bermejo-Deval, Oliver Y. Gutierrez, Johannes A. Lercher, Laura Gagliardi, Aditya Bhan
Summary: In this study, the steady state propylene oligomerization rates and selectivities were measured on Ni/UiO-66 metal organic framework (MOF), demonstrating the validity of the Cossee-Arlman mechanism. It was found that propylene dimerization reaction follows a first-order kinetics with respect to propylene pressure, and the selectivities are consistent with the selectivity expressions derived from the Cossee-Arlman mechanism.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
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)
