Review
Biochemistry & Molecular Biology
Vitaly Volkov, Alexander Chernyak, Nikita A. Slesarenko, Irina A. Avilova
Summary: This review focuses on the progress of solvation and mobility studies in solid electrolyte, particularly ion-exchange membranes and composite materials, using NMR techniques. The applications of various NMR techniques are discussed, and comparisons are made between diffusion coefficients and ionic conductivity data. The microscopic mechanism of ionic transfer is also explored.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
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)
Article
Chemistry, Multidisciplinary
Christian Schroeder, Stacey Zones, Michael Ryan Hansen, Hubert Koller
Summary: The zeolite catalyst SSZ-42 exhibits a high abundance of hydrogen-bonded Bronsted acid sites, with the classification and diversity of hydrogen bonding affecting chemical shifts. The alignment of oxygen atoms is expected to impact their role in catalytic reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Yi Zhu, Jun Wang, Yanping Zhai, Gurong Shen, Jianqiang Wang, Chen Wang, Meiqing Shen
Summary: Using Pd/beta as a passive NOx adsorber effectively reduces cold-start NOx emissions from automotive diesel engines. This study explores the prevention of Pd ion reduction and finds that Pd ions anchored near T1-T2 sites remain stable, while those near T3-T9 sites can be easily reduced. Preserved Pd ions correspond to stable NOx storage capability and the appropriate desorption temperature.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xinyu Li, Zemin Chen, Daoming Huan, Bingbing Qiu, Kang Zhu, Zeming Qi, Hengjie Liu, Changrong Xia, Ranran Peng, Yalin Lu
Summary: This study demonstrates the successful modification of proton-conducting solid oxide fuel cell (PCFC) cathode surfaces using boron (B), leading to improved CO2 resistance and surface electrocatalytic activity for proton-involved oxygen reduction reaction (P-ORR). The introduction of B raises the surface Bronsted acid (-OH) concentration while suppressing the surface Lewis acidity, ultimately enhancing the power density of the PCFC.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Joanna E. Olszowka, Veronika Pashkova, Agnieszka Kornas, Jiri Dedecek, Jiri Brus, Martina Urbanova, Edyta Tabor, Petr Klein, Libor Brabec, Kinga Mlekodaj
Summary: Both stirring and ultrasonic pretreatment were used to activate the gel in the synthesis of two Al-rich mordenite samples. NMR spectroscopy showed that stirring resulted in a higher fraction of AlSiAl sequences in the gel compared to ultrasonic pretreatment, leading to a difference in the organization of Al atoms in the zeolite product.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
M. Arbel-Haddad, Y. Harnik, Y. Schlosser, A. Goldbourt
Summary: Geopolymers are a promising option for immobilizing nuclear waste, particularly radioactive cesium. The study found that cesium ions preferentially bind to zeolite F, and zeolite F is more efficient in immobilizing cesium compared to other crystalline or amorphous phases.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jas S. Ward, Elina I. Sievanen, Kari Rissanen
Summary: Solid-state NMR was used to study a series of Barluenga-type iodine(I) [L-I-L]PF6 complexes (L=pyridine, 4-ethylpyridine, 4-dimethylaminopyridine, isoquinoline) and their respective non-liquid ligands (L), precursor silver(I) complexes, and N-methylated pyridinium and quinolinium hexafluorophoshate salts. The results were compared to solution studies and single-crystal X-ray structures. Practical considerations were discussed to encourage wider utilization of this technique in the future as the first study of its kind on the solid-state NMR behavior of halogen(I) complexes.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Li Zhiguang, Qi Guodong, Xu Jun, Deng Feng
Summary: A series of ss zeolite catalysts with different acidic properties were prepared and characterized by solid-state nuclear magnetic resonance (NMR) probe molecule technique. The introduction of framework Sn and Al atoms resulted in both Bronsted and Lewis acidity, with a synergistic effect between the spatially adjacent Bronsted and Lewis acid sites. Sn-Al-ss catalyst showed superior catalytic activity and selectivity to methyl levulinate compared to other samples, attributed to the synergy of Bronsted and Lewis acid sites and stronger Bronsted acidity of Sn-Al-ss.
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
(2022)
Article
Chemistry, Physical
Ferenc Martinovic, Sabrina Ballauri, Nicola Blangetti, Samir Bensaid, Raffaele Pirone, Barbara Bonelli, Marco Armandi, Fabio Alessandro Deorsola
Summary: Solid state ion exchange was successfully used to introduce Fe cations into the small pore CHA structured SSZ-13 zeolite. Characterization of the produced catalysts revealed highly dispersed and heterogeneous Fe sites, with the type depending on the Al distribution in the zeolite. Dimeric Fe species formed preferentially at the start of the exchange, while isolated cations were formed once Al exchange sites were fully saturated.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Electrochemistry
Junko Kojima, Kenichi Uchiyama, Yumi Yoshida
Summary: The addition of beta ''-alumina was found to improve the electrode response of K+-ISE with Na0.33MnO2 as the inorganic insertion material, reducing potential drift and enhancing potential repeatability and Eo reproducibility to be similar to that of Na+-ISE.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Carolin Rieg, Daniel Dittmann, Zheng Li, Alan Kurtz, Elif Kaya, Stefan Peters, Benny Kunkel, Magdalena Parlinska-Wojtan, Sebastian Wohlrab, Ali M. Abdel-Mageed, Michael Dyballa
Summary: Trimethylphosphine (TMP) is demonstrated to be a suitable P-31 MAS NMR probe molecule for quantitatively determining the accessibility, environment, and spatial distribution of oxidation-active oxidic metal species on solid catalysts. The oxidation of TMP to trimethylphosphine oxide (TMPO) at oxygen donor sites is demonstrated for copper, manganese, cobalt, and molybdenum oxides.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
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
Biotechnology & Applied Microbiology
Ha Le, Phuoc H. Ho, Annette Trunschke, Reinhard Schomaecker, Arne Thomas
Summary: This study investigates the effects of zeolite topology and activation temperature on the catalytic performance of Cu- and Fe-containing zeolites. The results show that Cu species exchanged in medium-pore zeolites (mordenite, ZSM-5, and ferrierite) yield more methanol, while large-pore zeolites (zeolite beta and zeolite gamma) are not suitable for active Cu sites.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Chemistry, Organic
Michael B. Pastor, Chao Feng, Yi-Ju Tsai, Amelia Watson, Qinliang Zhao
Summary: X-ray crystal structures of four substituted N,N'-diarylformamidines reveal the formation of cyclic dimers in solid state, while steric hindrance from substituents affects the coexistence of s-trans and s-cis isomers in solution. The distribution of isomers in solution depends on solvent choice, concentration, and addition of acid or coordinating solvent.
Article
Chemistry, Multidisciplinary
Gunther Brunklaus, Hubert Koller, Stacey I. Zones
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2016)
Article
Chemistry, Physical
Hubert Koller, Soumya Senapati, Jinjun Ren, Tobias Uesbeck, Vassilios Siozios, Michael Hunger, Raul F. Lobo
JOURNAL OF PHYSICAL CHEMISTRY C
(2016)
Article
Chemistry, Physical
Hubert Koller, Tobias Uesbeck, Michael Ryan Hansen, Michael Hunger
JOURNAL OF PHYSICAL CHEMISTRY C
(2017)
Article
Chemistry, Multidisciplinary
Nicolas A. Grosso-Giordano, Christian Schroeder, Alexander Olkrut, Andrew Solovyoy, Christian Schottle, Walter Chasse, Nebojsa Marinkoyic, Hubert Koller, Stacey I. Zones, Alexander Katz
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2018)
Article
Chemistry, Multidisciplinary
Christian Schroeder, Michael Ryan Hansen, Hubert Koller
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2018)
Article
Chemistry, Physical
Christian Schroeder, Vassilios Siozios, Christian Mueck-Lichtenfeld, Michael Hunger, Michael Ryan Hansen, Hubert Koller
CHEMISTRY OF MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Christian Schroeder, Christian Mueck-Lichtenfeld, Le Xu, Nicolas A. Grosso-Giordano, Alexander Okrut, Cong-Yan Chen, Stacey I. Zones, Alexander Katz, Michael Ryan Hansen, Hubert Koller
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Physical
Christian Schroeder, Vassilios Siozios, Michael Hunger, Michael Ryan Hansen, Hubert Koller
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Chemistry, Multidisciplinary
Nicolas A. Grosso-Giordano, Christian Schroeder, Le Xu, Andrew Solovyov, David W. Small, Hubert Koller, Stacey I. Zones, Alexander Katz
Summary: This study investigates the interaction between a molecule and a pore mouth by characterizing the conformation of a macrocyclic calix[4]arene-Ti-IV complex grafted on the external surface of a zeotype. The unique conformation of the complex is detected when grafted at crystallographically equivalent locations, revealing how the surrounding environment controls this confinement. Overall, the study provides insights into the essential intermediate for adsorption processes and demonstrates the sensitivity of the confinement control.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Christian Schroeder, Stacey Zones, Christian Mueck-Lichtenfeld, Michael Ryan Hansen, Hubert Koller
Summary: The researchers successfully prepared the highly ordered extra-large pore zeolite SSZ-59 with Al atoms in T6 positions forming double-zigzag chains along the 14 MR channels. Analysis of NMR signals revealed the impact of Al site ordering on Bronsted acidity, marking the first observation of the residual H-1-Al-27 dipolar effect.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Christian Schroeder, Stacey Zones, Michael Ryan Hansen, Hubert Koller
Summary: The zeolite catalyst SSZ-42 exhibits a high abundance of hydrogen-bonded Bronsted acid sites, with the classification and diversity of hydrogen bonding affecting chemical shifts. The alignment of oxygen atoms is expected to impact their role in catalytic reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Christian Schroeder, Christopher M. Lew, Stacey I. Zones, Hubert Koller
Summary: The borosilicate zeolites can be converted to aluminosilicates through reaction with aluminum nitrate solution. The process of removing boron atoms is inhibited, possibly due to the Lewis acidic nature of aluminum ions. The positions of aluminum in the crystal structures were determined through computational and experimental methods, and it was found that aluminum insertion occurs at the boron sites. This approach can be used to create aluminosilicate zeolite catalysts with ordered active sites.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Christian Schroeder, Michael Ryan Hansen, Hubert Koller
Summary: The interaction between Bri nsted acid sites, AlOH groups, and residual NH4+ cations in zeolites mordenite and ferrierite was investigated. High temperatures are required to eliminate NH4+. NMR data reveal NH4+ cations primarily in the vicinity of BAS and other NH4+ in mordenite, while AlOH groups in ferrierite.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Ya-Fan Chen, Christian Schroeder, Christopher M. Lew, Stacey I. Zones, Hubert Koller, Marek Sierka
Summary: In this study, the structure and formation mechanism of silanol dyads in SSZ-55 zeolite were investigated using computational methods. It was found that silanol dyads are commonly present at vacancies and the vacancy density affects the relaxation of the zeolite framework.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Christopher M. Lew, Dan Xie, Kurt O. Jensen, Christian Schroeder, Jonas Blaser, Hubert Koller, Stacey I. Zones
Summary: SSZ-82 (SEW) is a zeolite with a 12 x 10 membered ring structure and intersecting pore channels of different dimensions, offering intriguing catalytic possibilities. Previously, SSZ-82 could only be directly synthesized as a borosilicate. However, this study demonstrates that the borosilicate material can be used as seeds to synthesize an aluminosilicate product, Al-SSZ-82, through interzeolite conversion using FAU zeolite as the parent zeolite and B-SSZ-82 as seeds. The use of SSZ-82 seeds, organic structure-directing agent, Na+, and total OH- were all found to be important for the successful conversion to SSZ-82, and the conversion rate was influenced by the surface area and heteroatom of the SSZ-82 seeds.
CHEMISTRY OF MATERIALS
(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)
