Article
Nanoscience & Nanotechnology
Alma D. Salazar-Aguilar, Asuncion Quintanilla, Pablo Lopez, Carla Martinez, Sofia M. Vega-Diaz, Jose A. Casas, Pilar Miranzo, M. Isabel Osendi, Manuel Belmonte
Summary: The study focuses on the synthesis of dihydroxybenzenes (DHBZ) from the hydroxylation of phenol, using 3D printed Fe/gamma-Al2O3 monoliths as catalysts. The unique printing strategy allows the production of catalytic monoliths with improved DHBZ synthesis performance, demonstrating higher reaction efficiencies compared to conventional processes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Zhen Li, Han Seul Park, Jennifer X. Qiao, Kap-Sun Yeung, Jin-Quan Yu
Summary: With the growing importance of C-H activation reactions in the past decade, finding catalysts that can utilize green oxidants under safe and practical conditions has become a challenge. This study introduces a new bifunctional bidentate ligand, CarboxPyridone, which enables the room-temperature Pd-catalyzed hydroxylation of benzoic and phenylacetic acids using aqueous hydrogen peroxide. The scalability and utility of this method is demonstrated through large-scale reactions and the synthesis of polyfluorinated natural products.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Alma D. Salazar-Aguilar, Asuncion Quintanilla, Pablo Lopez, Carla Martinez, Sofia M. Vega-Diaz, Jose A. Casas, Pilar Miranzo, M. Isabel Osendi, Manuel Belmonte
Summary: The 3D printing of Fe/gamma-Al2O3 monoliths with Fe-MOF-based inks allows for the production of catalytic structures with highly dispersed Fe clusters, nanoclusters, and nanoparticles. By conducting the phenol hydroxylation reaction in a flow reactor using these printed scaffolds, a DHBZ selectivity of 100% and a yield of 32% were achieved, showcasing improved synthesis efficiency compared to conventional methods.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Organic
Jing-Jing Ai, Bei-Bei Liu, Jian Li, Fei Wang, Cheng-Mi Huang, Weidong Rao, Shun-Yi Wang
Summary: An iron-sulfur complex formed by mixing FeCl3 with S-3(center dot-) from K2S is developed for selective aerobic oxidation of terminal alkenes. The reaction can be carried out under an atmosphere of O-2, and can proceed on a gram scale, expanding the application of S-3(center dot-) in organic synthesis. This study also encourages further exploration of the application of Fe-S catalysts in organic reactions.
Article
Engineering, Environmental
Gonzalo Vega, Asuncion Quintanilla, Manuel Belmonte, Jose A. Casas
Summary: The study investigated the chemical kinetics of phenol hydroxylation to produce dihydroxybenzenes using a 3D printed monolithic reactor. The experiments showed that the hydroxylation reaction mechanism involved three elementary reactions, leading to the formation of dihydroxybenzenes with a selectivity above 99% at 80 degrees Celsius in Fe/SiC honeycomb monolithic reactors.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Stepan Sklenak, Thomas Groizard, Hana Jirglova, Petr Sazama, Jiri Dedecek
Summary: Distant binuclear cationic M(II) centers in transitionmetal-exchanged zeolites demonstrate the activation of dioxygen and subsequent oxidation of methane to methanol at room temperature. The reactivity of the alpha-oxygen species with dihydrogen provides valuable insights into their unique characteristics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Guangqiang Mei, Wei Tan, Xingxia Cui, Cong Wang, Qing Yuan, Yafei Li, Cancan Lou, Xuefeng Hou, Mengmeng Zhao, Yong Liu, Wei Ji, Xiaona Zhang, Min Feng, Limin Cao
Summary: Researchers have achieved room-temperature ferromagnetism by doping Fe into SnSe. This ferromagnetic semiconductor has a large bandgap and may be applied in next-generation information device technologies, with the advantage of scalability for industrial production.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Maddila Anil Kumar, Parasuraman Selvam
Summary: In this study, a highly ordered hexagonal mesoporous iron phosphate material HMI-41 was successfully synthesized using an imidazolium-based ionic liquid as a structure directing agent. The HMI-41 catalyst showed excellent performance in acid medium for phenol hydroxylation, achieving high selectivity and conversion rates with a hydroquinone-to-catechol ratio that is the highest ever reported.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Physical
David W. Kastner, Aditya Nandy, Rimsha Mehmood, Heather J. Kulik
Summary: Non-heme iron halogenases and hydroxylases catalyze the functionalization of diverse biological products by activating inert C-H bonds. Crystallographic and spectroscopic data analysis shows that hydroxylases and halogenases exhibit different substrate positioning preferences. Molecular dynamics simulations guided by experimental information reveal the key substrate interaction partners and the impact of the protein environment on the substrate approach angles.
Article
Chemistry, Physical
David W. Kastner, Aditya Nandy, Rimsha Mehmood, Heather J. Kulik
Summary: Non-heme iron halogenases and hydroxylases regulate the formation of diverse biological products under physiological conditions. Crystallographic and spectroscopic data showed that hydroxylases prefer an acute angle while halogenases prefer a more obtuse angle. Molecular dynamics simulations revealed that the protein environment in halogenases prevents the sampling of acute angles observed in hydroxylases and vice versa.
Article
Biochemical Research Methods
Dongbo Mi, Yixuan Mao, Bingqing Wei, Yan-Chun Li, Xiaofeng Dong, Konstantin Chingin
Summary: The abundant formation of phenol and molecular hydrogen was observed when benzene vapor was exposed to gas plasma generated by +5.5 kV corona discharge of water vapor in argon in the absence of oxygen. The formation of phenol is proposed to occur through a reaction between neutral benzene and the radical cation of water dimer, leading to a novel catalyst-free method for preparing phenol with high selectivity.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2022)
Article
Chemistry, Multidisciplinary
Meng-Xuan Gu, Xiao-Qin Zheng, Song-Song Peng, Shi-Chao Qi, Xiao-Qin Liu, Lin-Bing Sun
Summary: We provide a simple method for synthesizing Fe single-atom catalysts (SACs) by utilizing the confined space in template-occupied SBA-15. The Fe precursor is easily introduced into the confined space to form a Fe-O-Si structure through solid phase grinding and calcination. The synthesized Fe SACs exhibit significantly higher activity for phenol hydroxylation reaction than the comparison samples without confined space.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Inorganic & Nuclear
Yitao Zhao, Haoran Xing, Qiang Wang, Yinjuan Chen, Jiawei Xia, Hui Xu, Guangyu He, Fengxiang Yin, Qun Chen, Haiqun Chen
Summary: Efficient and selective oxidation of arene C-H bonds has long been a challenging goal. Here, we present a facile and practical strategy to fabricate an N-doped reduced graphene oxide (NRGO) based single-atom Cu catalyst (SACu-NRGO) for the selective oxidation of benzene to phenol at room temperature. The SACu-NRGO exhibits excellent catalytic performance with a selectivity of 98.6% towards phenol, thanks to the fully exposed and homogeneously dispersed CuN3 active sites anchored by adjacent pyrrolic N atoms in the NRGO skeleton. Furthermore, the structure of the single-atom active sites and the mechanism of the oxidation process are elucidated in depth through DFT calculations.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Multidisciplinary
Thomas G. Linford-Wood, Nathan T. Coles, Ruth L. Webster
Summary: This study reports the reduction of carbon-carbon double bonds using a three-coordinate iron(ii) beta-diketiminate pre-catalyst, employing poly(methylhydrosiloxane) as the hydride donor and a bio-alcohol as the proton source. The results show that allyl arene substrates, styrenes, and aliphatic substrates can all undergo reduction at room temperature using n-butanol and ethanol. Additionally, by changing the deuterium source to d-aniline, high regioselectivity for mono-deuteration of the terminal position of the double bond can be achieved.
Article
Engineering, Chemical
Yuzhou Wu, Xubin Zhang, Fumin Wang, Yi Zhai, Xianbao Cui, Guojun Lv, Tao Jiang, Jiaqi Hu
Summary: In this study, Cu/Fe-SBA-15 catalyst was synthesized and used for the direct hydroxylation of benzene, demonstrating good catalytic activity. The interaction and synergistic effect between iron and copper sites were also investigated.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Physical
Xuanxuan Jia, Hao Liu, Yu Zhang, Wei Chen, Qing Tong, Guangxia Piao, Chuanzhi Sun, Lin Dong
Summary: A novel Fe-Sb binary metal oxide catalyst was synthesized, showing excellent activity and stability in the NH3 selective catalytic reduction of NO reaction. The introduction of Sb improved the adsorption behavior of NOx species on the catalyst surface, contributing to enhanced efficiency of the NH3-SCR reaction.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Environmental
Wei Tan, Annai Liu, Shaohua Xie, Yong Yan, Thomas E. Shaw, Yu Pu, Kai Guo, Lulu Li, Shuohan Yu, Fei Gao, Fudong Liu, Lin Dong
Summary: Investigating catalytic reaction mechanisms can guide catalyst design, as demonstrated by the innovative CeO2-SiO2 mixed oxide catalyst (CeSi2) with excellent SO2/H2O resistance in harsh working conditions. The strong Ce-O-Si interaction and abundant surface hydroxyl groups on CeSi2 provide active acid sites and inhibit SO2 adsorption, enhancing the NH3-SCR performance through an enhanced Eley-Rideal mechanism. This work offers a strategy to develop an environmentally friendly NH3-SCR catalyst with superior SO2 resistance.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Mingxuan Li, Yandi Cai, Jinjin Zhang, Haixiao Sun, Zhi Li, Yujie Liu, Xin Zhang, Xiaoping Dai, Fei Gao, Weiyu Song
Summary: The study successfully enhanced the specific activity of ethanol oxidation reaction by synthesizing Pt3Ni nanowires with tailored structure, improving catalyst stability, and providing a promising pathway for the design and development of durable alloy nanocatalysts for direct ethanol fuel cell applications.
Article
Chemistry, Physical
Shuna Li, Yao Wang, Yunrui Li, Xu Fang, Yujie Liu, Mingxuan Li, Zhen Wang, Yufeng Gao, Haixiao Sun, Fei Gao, Xin Zhang, Xiaoping Dai
Summary: This study presents a simple method to synthesize e-PtNiCu NWs with high proportions of (110) and (100) facets, which exhibit remarkable performance in ethanol electrooxidation reaction. The improved performance of e-PtNiCu NWs is attributed to the synergistic catalytic effect between (110) and (100) facets. The thermodynamics and kinetic studies suggest that the synergistic effect of both facets can decrease the activation energy barrier and facilitate the charge transfer during the reaction.
Article
Chemistry, Physical
Shaohua Xie, Wei Tan, Yuejin Li, Lu Ma, Steven N. Ehrlich, Jiguang Deng, Peng Xu, Fei Gao, Lin Dong, Fudong Liu
Summary: In this study, an efficient NbCuCe oxide catalyst for reducing NOx emissions in cold-start diesel engines is reported. The catalyst exhibits higher DeNO(x) activity below 200 degrees C compared to the Cu-CHA zeolite catalyst, along with superior sulfur resistance, faster response, and lower NH3 slip. Atomically dispersed Cu species facilitate strong interaction between Cu and the Nb/Ce base catalyst, leading to improved low-temperature redox properties and NH3 adsorption/activation. The developed NbCuCe catalyst shows promising potential for efficient DeNO(x) in cold-start diesel engines and can be combined with Cu-CHA for a broader temperature range of operation.
Article
Chemistry, Physical
Shuna Li, Haixiao Sun, Jiaai Zhang, Longjiao Zheng, Yunrui Li, Xu Fang, Yujie Liu, Qi Song, Zhen Wang, Yufeng Gao, Xin Zhang, Xiaoping Dai, Yandi Cai, Fei Gao
Summary: Strengthening the oxide-metal interfacial synergistic interaction in nanocatalysts is an effective strategy to enhance the intrinsic activities and availability of active sites. In this study, SnO2/PtNi concave nanocubes enclosed by high-index facets were successfully fabricated and exhibited significantly improved catalytic performance for electrooxidation reactions. The strong interfacial interaction between SnO2 and PtNi not only reduces the activation energy barrier but also enhances the catalyst's CO-resistance and long-term stability.
Article
Chemistry, Physical
Zhonghui Cui, Song Song, Huibin Liu, Yingtian Zhang, Fei Gao, Tong Ding, Ye Tian, Xiaobin Fan, Xingang Li
Summary: By constructing dual-site copper catalysts with Cu+ single atoms and Cu nanoparticles, this study successfully enhances the water-gas shift reaction, increasing CO adsorption and catalytic activity, especially performing better at low temperatures.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Wei Tan, Shaohua Xie, Xin Wang, Juntian Xu, Yong Yan, Kaili Ma, Yandi Cai, Kailong Ye, Fei Gao, Lin Dong, Fudong Liu
Summary: In this study, an efficient CuO catalyst supported on a CeO2-Al2O3 support (CA-T) prepared by two-step incipient wetness impregnation (T-IWI) method was successfully developed. The Cu/CA-T catalyst exhibited better catalytic performance in CO oxidation and NO reduction by CO (NO + CO reaction) as well as higher thermal stability compared to the CuO catalyst loaded on conventional CeO2-Al2O3 support (Cu/CA). The microstructure of CuO-CeO2-Al2O3 catalysts, especially the state of Cu species, was systematically investigated using various characterization techniques. The mechanisms of CO oxidation and NO + CO reactions on Cu/CA and Cu/CA-T catalysts were collaboratively revealed.
Article
Chemistry, Applied
Yandi Cai, Peng Yang, Qinglong Liu, Kaili Ma, Wenxin Ma, Wang Song, Qiuhui Qian, Fei Gao, Wei Tan, Lin Dong
Summary: Sulfation treatment with different durations was performed on PrOx, and it was found that the catalytic performance of sulfated PrOx in the NH3-SCR of NO is highly dependent on the sulfation time. This study provides new insights into tuning the interaction between the PrOx surface and reactants (NO, NH3) via sulfation treatment, which can guide the design and application of PrOx-based catalysts for NH3-SCR of NO in the future.
JOURNAL OF RARE EARTHS
(2023)
Article
Multidisciplinary Sciences
Wei Tan, Shaohua Xie, Duy Le, Weijian Diao, Meiyu Wang, Ke-Bin Low, Dave Austin, Sampyo Hong, Fei Gao, Lin Dong, Lu Ma, Steven N. Ehrlich, Talat S. Rahman, Fudong Liu
Summary: Constructing single atom catalysts with fine-tuned coordination environments can lead to satisfactory catalytic performance. By controlling the calcination temperature, CeO2 supported Pt single atom catalysts with precisely controlled coordination environments were successfully synthesized. The different Pt-CeO2 coordination environments have an impact on reactant adsorption/activation and product desorption, thus resulting in different catalytic performance.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Lipeng Ding, Shaoxiong Zhang, Qinglong Liu, Peng Yang, Yandi Cai, Wei Tan, Wang Song, Fei Gao, Lin Dong
Summary: Catalysts for Nb/CeSi2 with different loadings of niobium were synthesized and evaluated for NH3-SCR performance over a broad temperature range. The 20Nb/CeSi2 catalyst exhibited the best low-temperature NH3-SCR performance while maintaining excellent SO2/H2O resistance. The addition of niobium resulted in variations in the surface structure, specific surface area, and acidity of the catalyst, which facilitated the SCR reaction. The interaction between niobium and ceria was found to enhance the activation of inert surface nitrate, contributing to the improvement of the catalyst performance at low temperature.
CHEMICAL PHYSICS IMPACT
(2023)
Article
Engineering, Environmental
Wei Tan, Shaohua Xie, Yandi Cai, Haowei Yu, Kailong Ye, Meiyu Wang, Weijian Diao, Lu Ma, Steven N. Ehrlich, Fei Gao, Lin Dong, Fudong Liu
Summary: A highly efficient Pt single-atom catalyst was constructed for the catalytic oxidation of C3H8 by calcination of Pt catalysts on pre-stabilized Ce0.9Zr0.1O2 support. The Pt single atoms with different strengths of Pt-CeO2 interaction and coordination environment were successfully achieved by controlling the calcination temperatures. The Pt/CZO-750 catalyst exhibited higher C3H8 oxidation activity than Pt/CZO-550, attributed to the higher concentration of surface Ce3+ species/oxygen vacancies and stronger Pt-CeO2 interaction.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Wei Tan, Yandi Cai, Haowei Yu, Shaohua Xie, Meiyu Wang, Kailong Ye, Lu Ma, Steven N. Ehrlich, Fei Gao, Lin Dong, Fudong Liu
Summary: This study proposes a facile ZrO2 doping strategy to construct Pt-1/CexZr1-xO2 catalysts for eliminating harmful NH3 slip from stationary flue gas denitrification and diesel exhaust aftertreatment systems. The study finds that Pt/Ce0.9Zr0.1O2 catalyst exhibits the strongest Pt-CeO2 interaction and highest Pt-O-Ce coordination number, resulting in superior NH3 oxidation activity.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Peng Yang, Juntian Xu, Wei Tan, Qinglong Liu, Yandi Cai, Shaohua Xie, Song Hong, Fei Gao, Fudong Liu, Lin Dong
Summary: The catalytic oxidation performance of the Pt-1/CeO2 catalyst was greatly improved with the introduction of potassium species. Potassium ions acted as structural and electronic promoters, forming Pt-O-K interactions with Pt to directly regulate the coordination environment and electronic state of Pt, as well as the metal-support interaction between Pt and CeO2.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Fei Gao, Annai Liu, Wei Tan, Bing Hu, Ruihan Gong, Xing Cheng, Fudong Liu, Ge Chen, Lin Dong
Summary: A Ti3+-rich rutile TiO2 with a surface lattice expansion structure was prepared by H-2 treatment. The supported Pt single atoms on this surface were stabilized in a highly oxidized state and had a weaker affinity for CO, resulting in robust catalytic performance.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Applied
Lulu Wan, Gan Ye, Yuying Chang, Zhaohan Yang, Guangming Shi, Qiuli Zhang, Jin Wang
Summary: This study developed an efficient approach to upgrade the oxidative desulfurization (ODS) performance of Zr-MOFs with proton stimulation. Experimental results showed that the introduction of protons can significantly improve the ODS efficiency. This work provides a facile and efficient strategy for enhancing the ODS performance of pristine MOFs.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Qiqi Lu, Xiu-Zhi Wei, Qi Zhang, Xinghua Zhang, Lungang Chen, Jianguo Liu, Yubao Chen, Longlong Ma
Summary: The application of Pd-M bimetallic clusters in the selective hydrogenation reaction was investigated, and the Pd0.6Ni@S-1 catalyst was found to exhibit high selectivity in the conversion of phenylacetylene to styrene. The confinement effect of zeolite inhibited over-hydrogenation and improved the stability of the catalysts. Furthermore, the solvent properties also influenced the product distribution.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Review
Chemistry, Applied
Bo Li, Lumin Hong, Changdi Jing, Xianyang Yue, Huabo Huang, Qianqian Jiang, Jianguo Tang
Summary: MOF materials with adjustable pore structure and polymetallic sites have been explored as electrocatalysts for OER. Bimetallic materials show higher electrocatalytic activity than monometallic materials, while carbon-coated and doped MOF catalysts exhibit stable and good OER activity. The synergistic interaction between polymetallic active sites effectively improves the intrinsic activity of MOF on OER.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shichun Gu, Ruyi Wang, Junxiong Zhang, Hairong Dong, Liping Deng, Xue Wang, Yapeng He
Summary: In this study, monodispersed hollow mesoporous organosilica nanospheres with controlled core cavity and mesoporous shell were successfully synthesized. These hollow nanospheres showed a high adsorption capacity for Pb2+ in water solution and exhibited acceptable recycling and stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Lucie Havelkova, Bogdana Bashta, Michaela Vankova, Jiri Zednik, Jiri Brus, Jan Svoboda, Alice Vagenknechtova, Jan Sedlacek
Summary: An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with a permanent micro/mesoporous texture and a BET area of up to 1062 m2/g is reported. The homopolymerization is highly compatible with the heteroatom groups of the monomers and allows the preparation of well-defined porous networks with a wide spectrum of univalent groups.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shirui Pang, Yuxin Liu, Zhe Zhang, Yuxin Li, Chunguang Li, Zhan Shi, Shouhua Feng
Summary: This study focuses on using a functional separator to suppress the shuttle effect of soluble lithium polysulfides in Li-S batteries. It is found that the functionalized sulfonic acid group not only accelerates the conduction of lithium ions, but also repels polysulfide anions through electrostatic interactions. The performance of the batteries is significantly improved with the use of this functionalized separator.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Pingping Li, Lei Han, Donghun Kim, Kemal Celebi
Summary: This study presents a fast synthetic strategy for the preparation of high-quality platelike MFI crystals using a thin-wall tubular reactor. The strategy is efficient, time-saving, and can be optimized, making it applicable to the preparation and optimization of other important materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Haitao Yin, Wei Wang, Yuxin Li, Hu Wen, Shuang Chen, Nanzhe Jiang
Summary: This study presents a template-free and solid-state-like crystallisation method for the synthesis of ZSM-5 zeolite, which can be scaled-up in production. Mechanical mixing of starting material components improves the dispersion of materials, leading to ZSM-5 zeolite with high crystallinity and size uniformity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Congli Li, Jiang Wang, Zhenfei Wang, Jinxiang Dong, Qi Shi
Summary: This study investigates the evolution and autoreduction behavior of Cu species in CuCl/NaY adsorbent during vacuum thermal activation. It is found that Cu species migrate from supercages to the nearby plane of the six-membered ring connecting the supercage and sod cage during vacuum activation. At 150 degrees C, vacuum autoreduction occurs, resulting in the formation of Cu+Cl- species. The results provide reference for the preparation of pi-complex adsorbents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Irena Khatrin, Iman Abdullah, Alan J. Mccue, Yuni K. Krisnandi
Summary: Hierarchical porous system with two types of mesopores provides a solution to the diffusion limitation in conventional zeolites. Cobalt oxide impregnated hierarchical ZSM-5 zeolite samples with intra- and inter-crystalline mesopores were synthesized using two different strategies. The physicochemical properties of the modified catalysts were analyzed, revealing distinct features given by the two mesoporous configurations. Catalytic activity analysis showed that Co-oxide/ZSM-5 with inter-crystalline mesopores exhibited higher activity in methane partial oxidation reaction compared to Co-oxide/ZSM-5 with intra-crystalline mesopores.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Nataliia Reinders, Martin Durovic, Pavla Honcova, Zaneta Dohnalova, Jana Luxova, Stanislav Slang, Jhonatan Rodriguez-Pereira, Petra S. Sulcova
Summary: This study presents a new method for preparing a microporous Ni2P/C catalyst with high catalytic activity. The redox reaction and carbon matrix formation during high-temperature treatment contribute to the stability and activity of the catalyst. Experimental and analytical results suggest that the microporous structure of the composite plays a crucial role in its catalytic performance. These findings are important for practical applications of efficient hydrogen production by water electrolysis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Ana Raquel Bertao, Viktoriya Ivasiv, Cristina Almeida-Aguiar, Patricia R. Correia, Antonio M. Fonseca, Manuel Banobre-Lopez, Fatima Baltazar, Isabel C. Neves
Summary: This study developed a zeolite-based delivery system (ZDS) using silver and 5-Fluorouracil as antimicrobial and antineoplastic agents. The ZDS was characterized and its antimicrobial properties were investigated, showing better antibacterial effectiveness for the ZDS containing both silver and 5-FU.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Naonobu Katada, Nobuki Ozawa, Etsushi Tsuji, Keigo Kanehara, Akiho Otsuka, Taiga Sakamoto, Kirari Umezawa, Hitoshi Matsubara, Satoshi Suganuma, Momoji Kubo
Summary: First principles calculations were used to investigate the pathway for methylation of benzene with methane catalyzed by MFI type zeolite-supported Co species. The strong adsorption of benzene on Co is found to lower the activation energy for methane dissociation and promote the formation of toluene precursor. The activation energy of methane dissociation is also affected by the Al-Al distance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Yuan Liu, An T. Ta, Kyoung Chul Park, Shenyang Hu, Natalia B. Shustova, Simon R. Phillpot
Summary: We use density functional theory to investigate the interactions of cerium, americium, and curium cations with crown ethers. Our results demonstrate that crown ethers can capture cerium, americium, and curium ions, and modifying the crown ether structure by substituting nitrogen atoms for oxygen atoms significantly increases their binding energies with radionuclides.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Zhengwu Peng, Shixing Wang, Yihui Wu, Xiang Liu, Hongliang Liu, Dekun Zhang, Likang Fu
Summary: An efficient adsorbent for recovery of germanium was prepared and characterized in this study. The adsorption behavior of Ge(IV) on the adsorbent was analyzed, and the results showed that it follows pseudo-secondary kinetic model and Langmuir isotherm model. The adsorbent exhibited good anionic anti-interference ability and can still maintain high adsorption efficiency after repeated adsorption.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
