Article
Chemistry, Multidisciplinary
Thilali Akkal, Ahcene Soualah, Sophie Morisset, Julie Rousseau, Nourrdine Chaouati, Alexander Sachse
Summary: The impact of NH4F etching on the textural and catalytic properties of TS-1 was investigated. It was found that NH4F etching resulted in the generation of larger mesopores and a reduction in the coherent crystal size (CCS). The conversion kinetics of methyl-phenyl sulfide (MPS) were significantly influenced by the textural properties of the catalysts.
Article
Chemistry, Physical
Tao Dong, Qian Huang, Lu Chen, Jiahui Peng, Hui Hu, Qingming Huang, Xiaohui Chen
Summary: Au particles supported on TS-1 were prepared using ammonium salt solution as a promoter. The results showed that this method did not destroy the structure of TS-1 and retained the tetra-coordination skeleton of titanium. The gold precursor underwent a series of reactions to form gold nanoparticles.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Marvin Titze, Juliane Heitkaemper, Thorsten Junge, Johannes Kaestner, Rene Peters
Summary: Enantiopure secondary alcohols are high-value synthetic building blocks, and a new concept for catalytic hydroboration has been proposed with exceptional catalytic turnover numbers. The catalyst, accessible in few steps, is stable, recyclable, and efficient for at least 10 times of reuse.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Guojun Lv, Tao Wang, Yan Chen, Jiangzhang Wang, Xuyang Zou, Jun Lu, Fumin Wang, Xubin Zhang, Yi Zhai
Summary: The study focused on the influence of catalyst particles with excellent diffusion performance and suitable surface wettability on Pickering interfacial catalysis, using hydrophobized hollow TS-1 zeolite for selective oxidation reactions. The synthesized catalyst showed high catalytic activity for various reactions and demonstrated good reusability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Multidisciplinary
Zengxiang Lv, Leiduan Hao, Zhibo Yao, Weixiang Li, Alex W. Robertson, Zhenyu Sun
Summary: This research discovered that anolytes containing halide ions have a profound impact on the electrochemical synthesis of ammonia, intensifying the crossover of ammonium. Additionally, external factors such as applied potentials and Cl- concentration are closely associated with the migration and oxidation of ammonium.
Article
Chemistry, Inorganic & Nuclear
Amy J. Knorpp, Pietro Allegri, Shangxiong Huangfu, Alexander Vogel, Michael Stuer
Summary: This research focuses on transforming a dawsonite-type structure (NH4M(OH)(2)CO3) into a high-entropy material, which can exist as a highly entropic form with five equimolar and homogeneously distributed cations. The high-entropy dawsonites also exhibit the "memory effects" of non-high-entropy dawsonites. This study extends the field of high-entropy materials to include a structure that can serve as a material platform for the synthesis of high-entropy catalytic materials and ceramic powders.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Sanzhao Song, Jian Sun, Jing Zhou, Chengzhi Guan, Zhiwei Hu, Ting-Shan Chan, Xian-Long Du, Xiao Lin, Jun Hu, Linjuan Zhang, Jian-Qiang Wang
Summary: Molten salt synthesis is effective in preparing multicationic oxides at lower temperatures, allowing for the formation of crystalline solids like perovskites. Key factors influencing the process include the type of reaction medium, calcination temperature, ratio of salt, and reaction time. Additionally, the formation of LaOCl as an intermediate plays a crucial role in the phase-selective synthesis of perovskite LCO.
Article
Chemistry, Physical
Risheng Bai, Yue Song, Ge Tian, Fei Wang, Avelino Corma, Jihong Yu
Summary: The synthesis of highly efficient nano-sized Ti-rich TS-1 zeolites with controllable titanium species is crucial in zeolite catalytic reactions. A new method was developed using tetrabutyl orthotitanate tetramer as the titanium source, which slowed down the zeolite crystallization process and prevented the formation of anatase species. The Ti-rich TS-1 zeolite prepared with this method exhibited enriched active titanium species, enlarged external surface area, and superior catalytic performance in oxidative desulfurization reactions.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Engineering, Environmental
Tieyue Qi, Shuo Zhang, Tong Li, Lei Xing, Shanlong An, Qiangwei Li, Lidong Wang
Summary: This study fabricates nitrogen-doped porous carbon coembedded with lanthanum and cobalt (La-Co@NPC) as a dual-functional catalyst for sulfite oxidation and arsenic removal in the desulfurization process. The La-Co@NPC/S(IV) catalytic system generates strongly oxidizing free radicals for sulfite oxidation and oxidizes As(III) into As(V). The results show high efficiency in ammonium sulfite oxidation and arsenic removal, making it significant for the high-value recovery of sulfur resources in coal-fired desulfurization.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Applied
Wei Zhang, Haonan Xue, Min Wang, Zeying Wu, Linlin Ding, Yaoyao Deng, Wei Wang, Xuejiao Wei, Zhenwei Zhang, Mei Xiang
Summary: Cu-containing Beta zeolites can be synthesized directly in a one-pot method without template, showing excellent performance in the oxidation of cyclohexane and stable recyclability. This provides new insights into catalyst design for the catalytic oxidation of cyclohexane to KA-oil.
JOURNAL OF POROUS MATERIALS
(2022)
Article
Engineering, Environmental
Chih-Han Liu, Junjie Chen, Todd J. Toops, Jae-Soon Choi, Cyril Thomas, Michael J. Lance, Eleni A. Kyriakidou
Summary: Novel palladium(Pd)/SiO2(core)@Zr(shell) structured DOCs were developed with improved low-temperature activity and hydrothermal stability for diesel oxidation applications. The catalyst achieved 90% CO and total hydrocarbon conversion at temperatures of 178 and 372 degrees Celsius, respectively.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Katharina Roeser, Bettina Berger, Michael Widhalm, Mario Waser
Summary: An asymmetric protocol was developed to access a series of orthogonally functionalized acyclic chiral target molecules containing a quaternary stereogenic center through enantioselective alpha-alkylation catalyzed by chiral ammonium salts. Enantioselectivities up to e.r.=97.5 : 2.5 were achieved using just 1 mol % of Maruoka's spirocyclic ammonium salt catalysts, allowing for further functional group manipulations of the products.
Article
Chemistry, Organic
Xinhang Zhang, Hanyang Sun, Changhong Han, He Wang, Junpeng Zhang, Di Zhang, Bin Lin, Huiming Hua, Maosheng Cheng, Yongxiang Liu
Summary: The asymmetric total synthesis of neobraclactone C was achieved for the first time using a convergent synthetic strategy, with the longest linear sequence of 22 steps from known materials. Key steps of the synthesis include a steric hindrance/hydrogen bond dual-controlled Heck arylation reaction for the construction of hemiketal and cis-alkenyl in one step, as well as a CeCl3-catalyzed tricycle formation.
Article
Chemistry, Organic
Mario Martos, Isidro M. Pastor
Summary: This study investigates an efficient catalyst for synthesizing quinazolines through a sequence of condensation-cyclization-oxidation reactions. The method is simple and effective, with high yields and applicability in preparative scale. The activation of reagents under solvent-free conditions is enabled by functionalized imidazolium salt, while the presence of iron in the catalyst mediates the oxidation step. From an environmental perspective, this method is more environmentally friendly than other described methods.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Anna, Zhaohang Chen, Hongwei Qiao, Juanhong Gao, Mengyao Zhu, Chao Li
Summary: A series of xanthone derivatives were synthesized by rhodium-catalyzed cycloaddition and sequential oxidation, demonstrating wide applicability. The derivatives showed excellent yields and different substituent electron effects, highlighting the potential of the proposed approach. The successful one-pot synthesis from 1ethynyl-2-phenoxybenzene further emphasized the attractiveness of the current method for xanthone synthesis.
CATALYSIS COMMUNICATIONS
(2021)
Article
Chemistry, Applied
Yoshihiro Kubota, Satoshi Inagaki, Yuji Nishita, Keiji Itabashi, Yasuyuki Tsuboi, Tuan Syahylah, Tatsuya Okubo
Article
Chemistry, Physical
Tadashi Umeda, Hiroki Yamada, Koji Ohara, Kaname Yoshida, Yukichi Sasaki, Miku Takano, Satoshi Inagaki, Yoshihiro Kubota, Takahiko Takewaki, Tatsuya Okubo, Toru Wakihara
JOURNAL OF PHYSICAL CHEMISTRY C
(2017)
Correction
Chemistry, Multidisciplinary
Naoto Nakazawa, Takuji Ikeda, Norihito Hiyoshi, Yuka Yoshida, Qiao Han, Satoshi Inagaki, Yoshihiro Kubota
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2017)
Article
Chemistry, Multidisciplinary
Naoto Nakazawa, Takuji Ikeda, Norihito Hiyoshi, Yuka Yoshida, Qiao Han, Satoshi Inagaki, Yoshihiro Kubota
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2017)
Article
Chemistry, Physical
Qing Liu, Yuka Yoshida, Naoto Nakazawa, Satoshi Inagaki, Yoshihiro Kubota
Article
Chemistry, Physical
Masaru Ogura, Yumiko Shimada, Takeshi Ohnishi, Naoto Nakazawa, Yoshihiro Kubota, Toshiyuki Yokoi, Masahiro Ehara, Kenichi Shimizu, Nao Tsunoji
Summary: This paper introduces a joint industries-academia research project focusing on finding a suitable zeolite for NH3-SCR. The researchers discovered that zeolite AFX, with a similar topology to SSZ-16, showed promising performance in loading divalent copper ionic species with high hydrothermal stability.
Article
Chemistry, Applied
Nao Tsunoji, Kazuyoshi Tsuchiya, Naoto Nakazawa, Satoshi Inagaki, Yoshihiro Kubota, Toshiki Nishitoba, Toshiyuki Yokoi, Takeshi Ohnishi, Masaru Ogura, Masahiro Sadakane, Tsuneji Sano
Summary: This study utilized a multiple templating strategy to control the distribution of aluminum and phosphorus in AFX zeolite synthesis. The use of bulky template TEBOP2+ and small template Me4N+ resulted in AFX zeolites with different Si/Al ratios.
Characterization by elemental analysis and NMR spectroscopy revealed that TEBOP2+ mainly occupied the wide aft cage, while Me4N+ preferentially occupied the narrow gme cage, impacting the Si/Al ratio.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Hiroe Kubota, Takashi Toyao, Zen Maeno, Yusuke Inomata, Toru Murayama, Naoto Nakazawa, Satoshi Inagaki, Yoshihiro Kubota, Ken-ichi Shimizu
Summary: In this study, the researchers investigated the reduction/oxidation half-cycles of the selective catalytic reduction of NO with NH3 at 200 degrees C using in situ and operando spectroscopies. They proposed a general mechanism that is applicable to both V and Cu catalysts, where N-2 and H2O are formed during the reduction half-cycle and the regenerated V(V) or Cu(II) sites react with surface H+ to produce H2O during the oxidation half-cycle. The results provide comprehensive evidence of the general mechanism of NH3-SCR.
Article
Biochemistry & Molecular Biology
Petko St. Petkov, Kristina Simeonova, Iskra Z. Koleva, Hristiyan A. Aleksandrov, Yoshihiro Kubota, Satoshi Inagaki, Valentin Valtchev, Georgi N. Vayssilov
Summary: Computational modeling based on Density Functional Theory was used to understand the preference for the formation of silanol nests and the substitution of Si by Ti or Al in different crystallographic positions of the MSE-type framework. The energetically favorable processes were identified, and an experimental identification method for the T atom position in Ti-MCM-68 zeolite was suggested. Adsorption modeling of hydrogen peroxide at the Ti center in the framework showed a preference for molecular adsorption over dissociative adsorption.
Article
Chemistry, Inorganic & Nuclear
Rohit Prajapati, Divya Jadav, Madhu Pandey, Keisuke Nishimura, Satoshi Inagaki, Yoshihiro Kubota, Rajib Bandyopadhyay, Mahuya Bandyopadhyay
Summary: Silicoaluminophosphates SAPO-34 and SAPO-5 molecular sieves were selectively prepared by hydrothermal method and templates. Hierarchical catalysts were post-synthetically prepared by acid and base etching. Acid treated SAPO-34 showed better catalytic performance than alkali treated SAPO-34.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Madhu Pandey, Nao Tsunoji, Yoshihiro Kubota, Mahuya Bandyopadhyay
Summary: MCM type mesoporous silica materials can be functionalized with base and acid groups, which can increase the catalytic activity and selectivity. The base functionalized MCM-48 showed higher conversion rates for oxiranes and amines compared to the acid functionalized material.
Article
Chemistry, Applied
Satoshi Inagaki, Mei Takeyama, Kai Asanuma, Yu Yokose, Shengxiang Zhang, Tae Okuda, Kaisei Nakamura, Yuko Nishi, Yoshihiro Kubota
Summary: Crystalline microporous titanosilicates with multi-dimensional 12-ring channels are potentially useful as catalysts for phenol oxidation with H2O2. Among them, Ti-beta is a promising catalytic material that can be prepared via various methods, including deep dealumination of Al-rich beta leading to Ti incorporation. The resulting (Ti)-beta_OSDAF catalyst showed higher efficiency in phenol oxidation compared to conventionally prepared Ti-beta materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Chong Liu, Hiroe Kubota, Takehiro Amada, Takashi Toyao, Zen Maeno, Masaru Ogura, Naoto Nakazawa, Satoshi Inagaki, Yoshihiro Kubota, Ken-ichi Shimizu
Summary: In situ/operando spectroscopic experiments and DFT calculations were used to study NH3-SCR of NO over Cu-AFX zeolites, revealing that the oxidation of Cu(i) by O-2 as the exclusive oxidant plays a key role in the reaction at low temperatures.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Satoshi Inagaki, Ryo Ishizuka, Yuya Ikehara, Shota Odagawa, Kai Asanuma, Shunsuke Morimoto, Yoshihiro Kubota
Summary: A highly efficient Ti-MCM-68 catalyst for phenol oxidation with H2O2 was prepared by a mild liquid-phase treatment for the first time. The key preparation procedures to excellent catalytic activity and high para-selectivity were the use of aqueous solutions of the Ti source and calcination at 650 degrees C prior to catalytic use.
Article
Chemistry, Multidisciplinary
Qiao Han, Atsuhiro Tanaka, Masayuki Matsumoto, Akira Endo, Yoshihiro Kubota, Satoshi Inagaki
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)
