Review
Chemistry, Multidisciplinary
Hongwei Zhang, Xindie Jin, Jong-Min Lee, Xin Wang
Summary: This review discusses the current research status of single atom catalysts (SACS) and outlines five tailoring strategies to improve their electrocatalytic activity, involving optimizing the electronic state of active sites, tuning d orbitals of transition metals, adjusting adsorption strength of intermediates, enhancing electron transfer, and elevating mass transport efficiency. Additionally, the synergistic effect from adjacent atoms and recent advances in tailoring strategies on active sites with binuclear configuration were summarized.
Review
Engineering, Chemical
Guanghui Zhao, Xuliang Deng, Dong Lin, Jincheng Liu, Yong-jun Zhang, Yibin Liu, Xiaobo Chen, Xiang Feng, De Chen, Chaohe Yang, Honghong Shan
Summary: This review provides a comprehensive summary of the state-of-the-art synthetic strategies of high-efficient Ti sites in TS-1 for alkene epoxidation. It discusses the improvement mechanisms and epoxidation mechanisms of these strategies. The current limitations and future perspectives on the development of eco-sustainable alkene epoxidation are also analyzed.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Environmental
Kui Yang, Xinyuan Zhang, Daoyuan Zu, Hongjian Zhou, Jinxing Ma, Zhifeng Yang
Summary: This study explores the effect of pore size on the efficiency of a flow-through anode, finding that when the pore size is below a certain threshold, the electrooxidation kinetics is minimally improved and the permeability declines dramatically. The reactivity of the anode is found to be related to the catalytically active volume/sites.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Qingxue Lai, Zeming Tang, Zhongxu Wang, Da Bi, Yi Sheng, Ningning Chen, Jingxiang Zhao, Yanyu Liang
Summary: A novel homogeneous electrocatalyst system was proposed by decoupling the active sites from the carbon support. This system showed significant advantages in regulating surface properties and molecular configurations, resulting in superior oxygen reduction reaction (ORR) activity for Zn-air battery application.
ACS MATERIALS LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Shaolong Zhang, Minchen Hou, Yanliang Zhai, Hongjie Liu, Dong Zhai, Youqi Zhu, Li Ma, Bin Wei, Jing Huang
Summary: Dual-Active-Sites Single-Atom catalysts (DASs SACs) are a type of catalysts with dual active sites, including single atomic active sites and other types of active sites. They exhibit excellent catalytic performance and have a wide range of applications. This review comprehensively describes the preparation methods, structural characteristics, and evaluations of DASs SACs in various applications, as well as discusses their unique catalytic mechanisms. The prospects and challenges of DASs SACs and their related applications are also highlighted.
Article
Chemistry, Physical
Yajie Feng, Yang Wang, Kaiwen Wang, Chaogang Ban, Youyu Duan, Jiazhi Meng, Xue Liu, Jiangping Ma, Jiyan Dai, Danmei Yu, Cong Wang, Liyong Gan, Xiaoyuan Zhou
Summary: Constructing dual-site catalysts has the potential to improve photocatalytic hydrogen production. Loading single atoms onto oxides with pre-introduction of surface oxygen vacancies offers an alternative strategy to overcome the challenge of forming a dual-site configuration. The Cu-1-Ti dual-site catalyst, formed by depositing Cu single atoms on TiO2 nanoparticles with abundant surface oxygen vacancies, demonstrates superior activity in photocatalytic hydrogen production.
Article
Chemistry, Physical
Fangjie Lu, Dong Xu, Xunchao Zhang, Lihua Kang, Xue Yin, Yiqing Wang, Mingyuan Zhu, Bin Dai
Summary: The high price of precious metal catalysts hinders their industrial implementation. Therefore, it is crucial to develop single-atom Fe-N4 catalysts with high site density. We synthesized Fe-N-C microporous catalysts (Cs-Fe-600) using pyridine-N confinement effect, which showed higher acetylene conversion compared to carbon-nitrogen material without Fe addition. The Cs-Fe-600 catalyst deactivated due to agglomeration of Fe metal and loss of pyridine-FeN4 active site, but recovered through high temperature treatment in ammonia gas.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Jeremy W. Arvay, Wei Hong, Christina Li, W. Nicholas Delgass, Fabio H. Ribeiro, James W. Harris
Summary: In this study, the difference in catalytic roles of extracrystalline and intracrystalline gold nanoparticles in direct propylene epoxidation was investigated. The results showed that the activation energy and reaction orders for propylene epoxidation were similar for both types of nanoparticles. However, the activation energy for hydrogen oxidation differed, indicating a change in rate-limiting step or active site. An active site model was developed to estimate catalytic turnover frequencies and it was found that the simultaneous mechanism occurring over proximal Au-Ti sites alone is not sufficient to explain the observed rate of propylene epoxidation, suggesting the kinetically relevant short-range migration of hydrogen peroxide. The study also found that the rates of hydrogen oxidation varied proportionally to the amount of surface gold atoms, indicating the importance of gold dispersion in the catalysts.
Article
Chemistry, Physical
Jeremy W. Arvay, Wei Hong, Christina Li, Fabio H. Ribeiro, W. Nicholas Delgass, James W. Harris
Summary: The catalytic roles of extracrystalline and intracrystalline gold nanoparticles on the direct propylene epoxidation were investigated, and it was found that there was no intrinsic difference between the two. The kinetics of the reaction were measured and the results were consistent with previous studies on intracrystalline gold nanoparticles. An active site model was developed and the estimated turnover frequencies were 20 times higher than previous estimates. The dispersion of gold was found to affect the rate of hydrogen oxidation.
Article
Chemistry, Multidisciplinary
Jae-Hyung Wee, Chang Hyo Kim, Tomohiro Tojo, Go Bong Choi, Cheol-Min Yang, Yoong Ahm Kim
Summary: In this study, the effect of boron (B) doping on the surface properties of activated carbon materials was explored based on water adsorption behavior and oxygen reduction reaction. It was found that B-doped AC materials at 1400 degrees Celsius have an open pore structure with B-O bonds, while at 1600 degrees Celsius a nonporous structure with a large amount of B-C bonds prevails. The B-O species act as active sites for water adsorption on the carbon surface, while B-C bonds decrease electrocatalytic activity due to their stable structure.
Article
Chemistry, Multidisciplinary
Weiyao Li, Jiangnan Li, Thien D. Duong, Sergei A. Sapchenko, Xue Han, Jack D. Humby, George F. S. Whitehead, Inigo J. Victorica-Yrezabal, Ivan da Silva, Pascal Manuel, Mark D. Frogley, Gianfelice Cinque, Martin Schroeder, Sihai Yang
Summary: We report high adsorption of SO2 in a series of Cu(II)-carboxylate-based metal-organic framework materials. The functionalization of ligands and the presence of open metal sites contribute to the reversible adsorption of SO2. Specifically, MFM-101 and MFM-190(F) exhibit fully reversible SO2 adsorption with the highest capacities among all reported porous solids under ambient conditions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Tao Ban, Xi-Yang Yu, Hao-Zhe Kang, Zheng-Qing Huang, Jun Li, Chun-Ran Chang
Summary: Developing single-atom-frustrated Lewis pair (SA-FLP) dual-active-site catalysts allows for the direct conversion of methane to value-added chemical products under nonoxidative conditions, significantly improving catalyst efficiency.
Article
Chemistry, Multidisciplinary
Jieru Zhang, Tai-Sing Wu, Ho Viet Thang, Kai-Yu Tseng, Xiaodong Hao, Bingshe Xu, Hsin-Yi Tiffany Chen, Yung-Kang Peng
Summary: Single-atom nanozymes show lower activity in mimicking natural enzymes compared to metallic counterparts on cluster nanozymes, which exhibit higher site activity and atom efficiency. Cluster nanozymes not only mimic horseradish peroxidase in glucose detection, but are also demonstrated to be a better oxidase mimetic for glutathione detection.
Article
Engineering, Environmental
Xiuli Dong, Chun Wang, Mingyang Zhang, Siqi Ji, Leipeng Leng, J. Hugh Horton, Hongliang Dong, Man Qiao, Yu Wang, Jiangwei Zhang, Zhijun Li
Summary: This study presents a straightforward and efficient approach to accessing single ruthenium atoms on a Bi2WO6 surface, resulting in a catalyst with enhanced catalytic performance through synergistic geometric and electronic effects. The reaction shows high conversion, selectivity, and turnover frequency.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Yujie Shi, Yuwei Zhou, Yang Lou, Zupeng Chen, Haifeng Xiong, Yongfa Zhu
Summary: The uniformity of active sites is crucial for modulating the conversion of functional groups. This review examines the construction strategies and characterization techniques of atomically dispersed uniform active sites on various supports, and discusses their unique behavior in catalytic transformations and their industrial utilization. It also highlights current challenges and frontiers in this field.
Article
Chemistry, Multidisciplinary
Duihai Tang, Tao Wang, Wenting Zhang, Zhen Zhao, Ling Zhang, Zhen-An Qiao
Summary: A liquid metal interfacial engineering strategy was developed for the synthesis of porous carbon with abundant functional groups using CCl4 as the carbon precursor and NaK as the reducing agent. This method allows for the direct generation of porous carbon at ambient temperature through the engineering of a highly active liquid metal alloy microemulsion. The synthesized porous carbon can be tandem-grafted with specific compounds to achieve a CO2 cycloaddition catalyst, which exhibits excellent catalytic activity and stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Hao Chen, Chuanye Xiong, Jisue Moon, Alexander S. Ivanov, Wenwen Lin, Tao Wang, Jie Fu, De-en Jiang, Zili Wu, Zhenzhen Yang, Sheng Dai
Summary: The construction of heterogeneous frustrated Lewis pairs (FLPs) with performance comparable to or surpassing the homogeneous counterparts in H-2 activation is achieved by anchoring sterically hindered Lewis acid (B center) and Lewis base (N center) sites within the rigid lattice of highly crystalline hexagonal boron nitride (h-BN) scaffolds. The resulting h-BN scaffolds exhibit highly efficient H-2/D-2 activation and dissociation under ambient pressure via FLP-like behavior, and demonstrate attractive catalytic efficiency in hydrogenation reactions surpassing the current homogeneous analogues.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Tao Wang, Liangliang Zhang, Jiaming Gu, Jingwei Liu, Zhilin Liu, Yu Xie, Hanyu Liu, Ling Zhang, Zhen-An Qiao
Summary: Synthetic polymer-derived hollow carbon spheres have practical value in many fields, and the synthesis of suitable polymer precursors is crucial. Exploring new polymer precursors and constructing refined hollow structures are important for synthetic methodology and novel carbon materials. In this study, Schiff base polymer (SBP) colloid spheres with refined hollow structures were synthesized using a tandem gradient growth and confined polymerization process.
Article
Materials Science, Multidisciplinary
Hongjian Wu, Changjun Xu, Chong Lei, Tao Wang, Yingli Gao, Xiaobing Zhang, Huiye Jin
Summary: The effect of helical electromagnetic stirring on the magnetic field, liquid steel flow, and heat transfer in vertical round billets has been studied by numerical simulation and industrial experiments. The results show that the electromagnetic force drives a rotating flow in the liquid steel, and the flow range and velocity are influenced by the current intensity and frequency.
Article
Chemistry, Analytical
Xiqing Liu, Tao Wang, Yongqing Wang
Summary: In this study, a conversion method and molecular imprinting technology were used to design MIP-based ratiometric fluorescence test papers. The ZnO QDs acted as the background quantum dots and ZIF-8 raw material, while CDs were used as the identification signals. The selective function of the imprinting layer enabled the design of a ZnO@ZIF-8/CDs@MIPs sensor for detecting BPA. The sensor exhibited a fast response time and effective detection in complex environments, with a detection limit of 0.778 nM and a linear range of 0-60 nM.
ANALYTICA CHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Tao Wang, Xiqing Liu, Hongquan Zhan, Runhua Liao, Yongqing Wang
Summary: Boosting photocatalytic activity through surface plasmon resonance (SPR) effect was demonstrated as an effective approach. In this study, metallic Bi was deposited in situ on the surface of Bi12TiO20 (BTO). The morphology, light properties, crystal structure, and chemical composition of the Bi/BTO composite were analyzed. The Bi/BTO composite showed increased light absorption and smaller electron transfer resistance. The SPR effect of metallic Bi generated hot electrons to promote the production of more active species, and the formed Schottky junction promoted electron separation, resulting in higher photocatalytic activity. The possible photocatalytic mechanism was also proposed for further development of plasmonic photocatalysts.
Article
Chemistry, Multidisciplinary
Liangliang Zhang, Yumeng Liu, Tao Wang, Zhilin Liu, Wei Li, Zhen-An Qiao
Summary: Two-dimensional mesoporous polymers, with the combination of organic polymers, porous materials, and 2D materials, have attracted great attention due to their potential applications in adsorption, catalysis, and energy storage. In this study, a facile multi-dimensional molecular self-assembly strategy was developed for the synthesis of 2D mesoporous polydiaminopyridines (MPDAPs) with tunable pore sizes and high N content. The resulting 2D MPDAPs exhibited excellent catalytic performance and could be transformed into N-doped mesoporous carbon with high CO2 uptake density.
Article
Chemistry, Multidisciplinary
Juntian Fan, Tao Wang, Bishnu P. P. Thapaliya, Meijia Li, Chi-Linh Do-Thanh, Takeshi Kobayashi, Ilja Popovs, Zhenzhen Yang, Sheng Dai
Summary: Researchers have successfully synthesized nitrogen-doped graphyne materials through a mechanochemistry-driven pathway using electron-deficient aromatic nitriles and CaC2 as precursors. The obtained materials exhibit abundant nitrogen content, tunable surface areas, and hierarchical porosity, making them promising for energy storage applications. These materials also demonstrate high capacitance, attractive rate performance, and good long-term stability in supercapacitor-related applications.
Article
Instruments & Instrumentation
Jiacheng Wang, Guangtao Lu, Huijun Song, Tao Wang, Dan Yang
Summary: In this paper, a new method called ISSA-MCSEn is developed to identify the size of early damages in thin plate-like structures. The algorithm combines improved singular spectrum analysis (ISSA) and multiscale cross-sample entropy (MCSEn) to successfully extract the principal components relevant to the damage and reconstruct the components for damage size detection. Experimental results show that the proposed ISSA-MCSEn algorithm has better performance than the SSA-FuzzyEn algorithm in detecting small-size damages. The relationship between the normalized MCSEn and the damages' size is linear and can be used for damage size detection.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Spectroscopy
Xiqing Liu, Le Tian, Runping Ren, Tao Wang, Yongqing Wang
Summary: Developing non-toxic, highly efficient, and selective fluorescence sensors is of great importance. In this study, a novel hollow fluorescence sensor was created using biomass carbon dots (CDs), ZIF-8, and molecularly imprinted polymers (MIPs) through aqueous polymerization. The sensor exhibited fast response time, excellent stability, and high selectivity towards bovine hemoglobin (BHb). Even in complex environments, the hollow fluorescence sensor (H-ZIF-8/CDs@MIPs) demonstrated effective recognition of BHb. This work presents a green and unique approach for practical applications of fluorescence sensors.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Materials Science, Multidisciplinary
Weiguang An, Xiaoxiao Sun, Yanhua Tang, Tao Wang, Zhe Wang
Summary: This study conducted cone calorimeter experiments on optical cables widely used in utility tunnels in China to investigate the coupling effect of spacing and heat flux on the fire performance of optical cables. The results showed that the optical cables conformed to the ignition time model of thermally thin material. Increasing the heat flux decreased the ignition time of the cables. The difference in ignition time between cables with different spacing was significant at a heat flux of 30 kW/m(2), but became small when the heat flux was higher. Additionally, both the average mass loss rate and heat release rate of the cables increased with increasing heat flux and spacing. The heat release rate versus time curves exhibited two peaks, with the second peak being significantly smaller.
FIRE AND MATERIALS
(2023)
Article
Chemistry, Physical
Qiang Deng, Honggen Peng, Zhenzhen Yang, Tao Wang, Jun Wang, Zheling Zeng, Sheng Dai
Summary: Developing a powerful bifunctional catalyst is crucial for achieving future carbon neutrality by reducing energy consumption in the chemical industry. This study synthesizes mesoporous zeolite-encapsulated palladium nanoparticles (Pd@meso-ZSM-5) using emulsification-demulsification and dry-gel transformation methods, which exhibit remarkable catalytic performance in the one-pot multiple tandem reaction of cyclic ketones to bicyclic alkanes. Unlike traditional two-step synthesis routes, Pd@meso-ZSM-5 efficiently produces bicyclic alkanes instead of monocyclic alkanes, due to the sufficient space for large molecular intermediates provided by mesoporosity and the promoting effect of the acid-Pd interface on intermediate conversion.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Multidisciplinary Sciences
Tao Wang, Runtong Pan, Murillo L. Martins, Jinlei Cui, Zhennan Huang, Bishnu P. Thapaliya, Chi-Linh Do-Thanh, Musen Zhou, Juntian Fan, Zhenzhen Yang, Miaofang Chi, Takeshi Kobayashi, Jianzhong Wu, Eugene Mamontov, Sheng Dai
Summary: Machine-learning technology is used to find the critical features for ideal carbon-based supercapacitors by analyzing previous research works. In this study, a machine-learning-derived activation strategy is designed to synthesize highly porous carbons with specific surface areas > 4000 m(2)/g using sodium amide and cross-linked polymer precursors. The resulting highly porous carbon-based electrode exhibits a high specific capacitance and approaches the predicted specific capacitance by the machine learning approach.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Zichuan Liu, Linghui Peng, Lingling Shen, Hongbo Qiu, Weiren Fan, Tao Wang, Bocheng Zhu, Xuchuan Jiang
Summary: This study presents the synthesis of ultrafine MnO2 nanoparticles with excellent dispersibility in water through a simple one-step hydrothermal route. The nanoparticles have a uniform size of 200 nm, a large specific surface area, and a high specific capacitance.
Article
Materials Science, Multidisciplinary
Tao Wang, Xiansheng Cai, Kun Chen, Boris Svistunov, Nikolay Prokof'ev
Summary: We address the issue of electron pairing in the presence of strong Coulomb repulsion at rs <= 2 and demonstrate the limitations of the pseudopotential framework. Instead, we propose separating the effects of Fermi liquid renormalization and the change in effective low-energy coupling. Our findings indicate a nonmonotonic behavior of the latter quantity with an extremum at rs ti 0.75. The Coulomb interaction enhances the pairing coupling at rs > 2, while the suppression of critical temperature is solely due to renormalized Fermi liquid properties. Leading vertex corrections have only a quantitative impact. Our results challenge the widely accepted repulsive pseudopotential approach and highlight the importance of precise microscopic treatment of Coulomb interactions in the study of superconducting instability.
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)