Article
Chemistry, Physical
Yuxiang Bao, Xiuhui Zheng, Jianlin Cao, Shuo Li, Yongxiao Tuo, Xiang Feng, Mingyuan Zhu, Bin Dai, Chaohe Yang, De Chen
Summary: This study presents a template-free and organic solvent-free strategy to synthesize a non-metallic based nitrogen-doped carbon catalyst for acetylene hydrochlorination. The catalyst exhibited outstanding performance due to its high pyrrolic N content and ability to effectively mediate HCl adsorption.
Article
Chemistry, Multidisciplinary
Shuhao Wei, Yiyang Qiu, Xiucheng Sun, Xiaolong Wang, Haitao Li, Guojun Lan, Jian Liu, Ying Li
Summary: The conversion of waste plastics into high value carbon materials is crucial for sustainable development. In this study, sustainable nanoporous carbon catalysts (NPCs) with high catalytic performance were prepared by using waste poly(vinyl chloride) (PVC) as a carbon source through a solid grinding method with the assistance of melamine. The addition of melamine facilitated the dechloridation of PVC at room temperature and significantly increased the yield of carbon products. NPCs exhibited superior catalytic performance in acetylene hydrochlorination and the generated vinyl chloride (VCM) could be polymerized to produce PVC, achieving material recycling.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Chaowei Si, Zan Lian, Min Yang, Bo Li
Summary: This study reveals the importance of carbon doping in activating the catalytic abilities of boron nitride, based on analyses of electronic structures. The reaction pathways mainly involve C2H2 or HCl adsorption as the first step.
APPLIED SURFACE SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Fangjie Lu, Qinqin Wang, Mingyuan Zhu, Bin Dai
Summary: In this study, carbon-nitrogen materials were synthesized and used in acetylene hydrochlorination reaction. Catalyst deactivation was caused by carbon accumulation, but it can be regenerated by ZnCl2 activation to eliminate carbon deposition and recover activity.
Article
Chemistry, Physical
Yawen Liu, Haiyang Zhang, Xiaoyan Li, Lingjie Wang, Yanzhao Dong, Wei Li, Jinli Zhang
Summary: In this study, N-doped carbon-based catalysts were synthesized using a unique method and showed high activity in acetylene conversion. The excellent performance of the N-doped catalyst was mainly attributed to its unique nitrogen intercalation pathway and mesoporous structure.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Physical
Samuel Pattisson, Simon R. Dawson, Grazia Malta, Nicholas F. Dummer, Louise R. Smith, Anna Lazaridou, David J. Morgan, Simon J. Freakley, Simon A. Kondrat, Joost J. Smit, Peter Johnston, Graham J. Hutchings
Summary: The commercialization of gold for acetylene hydrochlorination is a significant achievement in the field. The development of second-generation gold catalysts aims to enhance their activity and stability. This study demonstrates that the surface oxygen content of carbon-based gold catalysts affects their activity. By modifying the Hummers chemical oxidation method before gold deposition, the oxygen content of carbon can be adjusted. The oxidized carbon-based catalysts exhibit higher activity at lower temperatures compared to untreated carbon, with an optimum oxygen content of around 18%. Increasing the oxygen content and concentration of C-O functionality lowers the catalyst's light-off temperature, offering a potential approach to produce highly active acetylene hydrochlorination catalysts.
Article
Chemistry, Applied
Xingzong Dong, Guangye Liu, Zhaoan Chen, Quan Zhang, Yunpeng Xu, Zhongmin Liu
Summary: Compared with the Pd/AC catalyst, a new Pd-[DBU][Cl]/AC catalyst with enhanced stability was synthesized and applied in the hydrochlorination of acetylene. The enhanced stability is attributed to the prevention of Pd reduction and coke deposition, as well as the reduction of Pd species loss. The Pd-20[DBU][Cl]/AC catalyst shows promising potential as an alternative to HgCl2 catalysts.
CHINESE JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Organic
Kento Iwai, Yusuke Mukaijo, Haruyasu Asahara, Nagatoshi Nishiwaki
Summary: A new synthetic method for 10-arylated dibenzo[b, f] azepines was successfully developed, with a crucial step being the pseudo-intramolecular hydrohalogenation reaction conducted in a syn-selective manner. By N-acetylating the amino group, the desired coupling reactions were facilitated, leading to the successful synthesis of the target product.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Chemistry, Physical
Ming Lu, Xue Yin, Qinqin Wang, Xunchao Zhang, Mingyuan Zhu, Bin Dai
Summary: SnOx/activated carbon (AC) was synthesized by hydrothermal method and used for acetylene hydrochlorination. The SnOx/AC catalyst exhibited a higher acetylene conversion compared to the SnCI4/AC catalyst. The adsorption of reactants on SnOx was stronger than on SnC14, and the adsorption capacities of Sn and SnO in SnOx for reactants were different. By adjusting the valence ratio of SnOx, SnOx/AC 0 4 h demonstrated the best catalytic performance and adsorption capacity. However, the SnOx/AC catalyst was easily deactivated during acetylene hydrochlorination, and the doping of N effectively reduced the loss of Sn and improved the stability of the catalyst.
Article
Chemistry, Physical
Jiaqi Hu, Fumin Wang, Yongwang Li, Huihui Lv, Mingshuai Sun, Yi Zhai, Guojun Lv, Xubin Zhang
Summary: In this study, mesoporous carbon materials with adjustable N-doping content were synthesized and loaded with oxidized Ru species to create high-performance catalysts for acetylene hydrochlorination. Experimental results and DFT calculations revealed that N-doping inhibits coke deposition, increases the percentage of oxidized Ru species, and enhances the catalytic activity. Theoretical insights into the catalytic pathways of Ru in different valences were also provided, showing that oxidized Ru species have higher catalytic activities and revealing the molecular mechanism behind HCl activation of RuO2. These findings lay a theoretical foundation for the design and application of Ru-based catalysts in acetylene hydrochlorination.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Multidisciplinary
Feng Li, Haiyang Zhang, Miaomiao Zhang, Linfeng Li, Lisha Yao, Wencai Peng, Jinli Zhang
Summary: In this study, nonmetal hollow carbon nanospherical materials with hierarchical porous structures were synthesized via a self-templating method, providing local active sites for promoting improved activity and stability of the catalyst. Decorating the carbon material with heteroatomic groups played a crucial role in the synergistic adsorption and activation of reactants, contributing to the continuous exposure of active sites and impeding carbon deposition. The optimized PACP-800 catalyst shows significantly improved activity and stability, making it a promising candidate for industrial applications.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Engineering, Chemical
Xuan Tao, Fangyong Chen, Yonggang Xie, Xiaojing Cheng, Xiaoling Liu, Ge Gao
Summary: A novel N-doped carbon material (NC) catalyst was presented by the calcination of protonated polyaniline under specific chemical polymerization conditions, exhibiting both good activity and stability in acetylene hydrochlorination. The excellent catalytic stability was attributed to the synergetic effect of abundant microporous structure and proper nitrogen species. This work provides a facile method to prepare an environmentally friendly non-metallic catalyst with the potential for acetylene hydrochlorination.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Chemistry, Physical
Yuliang Zhou, Yuan Wang, Lixia Ling, Baojun Wang, Riguang Zhang
Summary: The study reveals the impact of the metal M type and local coordination environment in N-doped graphene anchored RuM diatomic catalysts on C2H2 hydro-chlorination activity, identifying five catalyst types with excellent performance. By tuning the local coordination environment and types of the second metal M, high-performance and low-cost RuM diatomic catalysts can be rationally designed for industrial applications.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Simon R. Dawson, Samuel Pattisson, Grazia Malta, Nicholas F. Dummer, Louise R. Smith, Anna Lazaridou, Christopher S. Allen, Thomas E. Davies, Simon J. Freakley, Simon A. Kondrat, Christopher J. Kiely, Peter Johnston, Graham J. Hutchings
Summary: The study investigates the use of sulfur-containing compounds as promoters for producing highly active Au/C catalysts. Through careful consideration of pre- or post-treatments, concentration of dopants used, and modification of washing steps, the observed enhancement in catalytic activity can be optimized. Pre-treatment of the carbon support with sulfuric acid resulted in the most active Au/C catalyst with an acetylene conversion of around 70% at 200 degrees C.
Article
Chemistry, Multidisciplinary
Dario Faust Akl, Georgios Giannakakis, Andrea Ruiz-Ferrando, Mikhail Agrachev, Juan D. Medrano-Garcia, Gonzalo Guillen-Gosalbez, Gunnar Jeschke, Adam H. Clark, Olga V. Safonova, Sharon Mitchell, Nuria Lopez, Javier Perez-Ramirez
Summary: Copper catalysts are promising for Hg-free VCM production, but the optimal architecture at the nanoscale is not well understood. This study modifies the metal precursor and annealing temperature to prepare copper nanoparticles or single atoms on an unmodified carbon support. The performance of all materials converges to the stable VCM productivity of the single-atom catalyst. Advanced characterization techniques uncover a reaction-induced formation of low-valent, single atom Cu(I)Cl site motif, regardless of the initial nanostructure. The study highlights the sustainability of Cu-based catalysts for VCM production.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Xiucheng Sun, Yuehan Wang, Geqian Fang, Jian Zhang, Chaojie Wang, Yang Chen, Yiming Gu, Lin Li, Ying Li, Jian Lin
Summary: This study developed a Pt catalyst supported by a metal-organic framework (CAU-1) material, achieving complete elimination of HCHO through a one-step storage-oxidation process at room temperature, with high adsorption capacity and catalytic efficiency.
APPLIED SURFACE SCIENCE
(2022)
Article
Food Science & Technology
Yu Wang, Yubiao Zhang, Mingxiao Hou, Wenfeng Han
Summary: This study found that parsley has significant anti-fatigue effects, which can be attributed to its flavonoids. The flavonoids in parsley regulate oxidative stress and exert an anti-fatigue effect by regulating specific pathways. Additionally, the intake of flavonoids stimulates the growth of beneficial microbiota and short chain fatty acid producing bacteria, which are involved in energy metabolism and fatigue regulation.
JOURNAL OF FUNCTIONAL FOODS
(2022)
Article
Chemistry, Inorganic & Nuclear
Xiaolong Wang, Dong Fan, Guojun Lan, Zaizhe Cheng, Xiucheng Sun, Yiyang Qiu, Wenfeng Han, Haodong Tang, Huazhang Liu, Yihan Zhu, Xiaojun Hu, Ying Li
Summary: The study found that the single vacancy sites on the surface of defective carbon form strong chemical bonds with ruthenium chloride and increase the electron density of ruthenium ions. On the other hand, the deactivation rate of ruthenium catalysts in acetylene hydrochlorination is closely related to their acidity and coke deposition. Research suggests that defective carbon supported ruthenium catalysts exhibit high catalytic activity and stability.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Engineering, Chemical
Yebin Zhou, Ling Li, Yi Liu, Hongzheng Wang, Zhenlong Feng, Feng Feng, Qunfeng Zhang, Wucan Liu, Wenfeng Han, Chunshan Lu, Xiaonian Li
Summary: In this study, an acid resistant and strawberry-like metal-carbon sphere was synthesized as a robust hydrogenation catalyst. The catalyst showed improved acid resistance and stability compared to traditional commercial catalysts, and exhibited excellent catalytic performance in the hydrogenation reactions.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Chaofan Ma, Yebin Zhou, Wei Yan, Wei He, Qiangqiang Liu, Zhen Li, Hongzheng Wang, Guowei Li, Yuanyuan Yang, Wenfeng Han, Chunshan Lu, Xiaonian Li
Summary: A novel porous carbon-metal composite was fabricated using nitrogen-doped carbon quantum dots and nickel. The resulting carbon nanosheet embedded with metal nanoparticles showed excellent catalytic activity and selectivity, suggesting its potential as a replacement for industrial catalysts.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Ruiqin Gao, Bo Hu, Zhenxing Fang, Meng Deng, Yuxue Wu, Qing Yan, Weiyong Yuan, Dehong Chen, Wenfeng Han, Zhengfei Chen
Summary: Surface reconstruction is a promising method to obtain highly efficient electrocatalysts for the oxygen evolution reaction (OER). In this study, Co-Fe based difluoride was synthesized through a simple solvothermal treatment process with the assistance of an ionic liquid. The resulting Co0.67Fe0.33F2 sample exhibited the highest electrocatalytic activity, generating a current density of 10 mA/cm(2) at an overpotential of 270 mV. The appropriate amount of iron dopant increased the number of active sites, and the in-situ leaching of fluorine during OER led to the formation of a metal oxyhydroxide layer with abundant oxygen vacancies, contributing to the high performance of the electrocatalysts.
CATALYSIS COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Wujian Zhang, Zhiling Huang, Hui Shen, Zhenhai Gu, Shengjie Xia, Panpan Zhang, Wenfeng Han, Ying Li, Haodong Tang
Summary: The spatial loading of redox cocatalysts on different faces of semiconductor single crystals is an effective approach to construct efficient photocatalysts. This study selectively deposited Pt nanoparticles on the electron-rich (001) face of LaOCl catalyst and demonstrated higher photocatalytic activity compared to random deposition on the entire surface. The addition of persulfate further improved the photodegradation performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Xiaoli Wei, Yifan Wei, Jiaqin Lu, Yunfan Huang, Yiwei Sun, Yu Wang, Lijia Liu, Bing Liu, Wenfeng Han
Summary: A nonmetallic catalyst SiC was fabricated by sequentially mechanochemical treatment and fluorination, which formed thin layers of graphite, COOH species, SiO2, and Si4C4-xO2 on the super surface of SiC. The layers of graphite, COOH species, and partial SiO2 could be removed via mechanochemical treatment, and the exposed SiO2 residue could be removed by fluorination, forming volatile SiF4. Simultaneously, the transition layer, Si4C4-xO2, was fluorinated to Si4C4-xF2, accompanied by enhanced Lewis acidity. The treated SiC showed significantly improved activity compared to the unmilled SiC, providing a feasible way to enhance the catalytic performance of nonmetallic catalysts for dehydrofluorination.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Guojun Lan, Zhenqing Li, Xiaojia Han, Liping Zhang, Yiyang Qiu, Xiucheng Sun, Zaizhe Cheng, Ying Li
Summary: The effects of the interactions between carbon support and ruthenium nanoparticles were studied, and it was found that nanodiamonds annealed at 900 degrees C transferred more electrons to Ru NPs, resulting in higher electron density and improved catalytic activity for the hydrogenation of levulinic acid. Furthermore, the Ru/ND-900 catalyst also exhibited better stability in aqueous phase than the Ru/ND catalyst.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Environmental Sciences
Xiucheng Sun, Yifei Jin, Zaizhe Cheng, Guojun Lan, Xiaolong Wang, Yiyang Qiu, Yanjiang Wang, Huazhang Liu, Ying Li
Summary: CO2 hydrogenation to methanol using Cu-ZnO catalysts with various ZrO2 contents was studied. The CuZn10Zr catalyst showed the highest Cu+/(Cu++Cu0) ratio and achieved the maximum space-time yield to methanol. Dual active sites, involving Cu0 and Cu+ species, were proposed to explain the high selectivity of methanol. The results provide insights into the role of promoters and the form of active sites in CO2 hydrogenation.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Engineering, Environmental
Wujian Zhang, Yue Meng, Yuhua Liu, Hui Shen, Zheming Ni, Shengjie Xia, Wenfeng Han, Ying Li, Haodong Tang
Summary: In this study, a LaOCl/LDH Z-scheme heterojunction catalyst containing oxygen vacancies was successfully constructed for efficient photodegradation of norfloxacin. The formation of Z-scheme heterojunction enhanced the separation and transfer of photogenerated carriers, and improved the redox capacity of the photocatalyst. Additionally, LC-MS analysis provided insights into the intermediates and possible pathway for the degradation of norfloxacin.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Lichun Li, Xiaoli Wei, Shenglan Zhou, Zhongsheng Jia, Chuanzhao Wang, Houlin Yu, Sen Wu, Ying Li, Wenfeng Han
Summary: Dehydrochlorination reaction can transform high-global-warming-potential hydrochlorofluorocarbons (HCFCs) into low-global-warming-potential hydrofluoroolefins (HFOs). A one-pot cascade reaction combining dehydrochlorination and hydrochlorination can produce valuable compounds without the need for tedious treatment steps. Among the screened heterogeneous catalysts, the mixed BaF2-NAC-M catalyst showed the best catalytic performance, with BaF2 and NAC playing different roles.
ACS ES&T ENGINEERING
(2022)
Article
Microbiology
Jia-jun Huang, Tao Wei, Zhi-wei Ye, Qian-wang Zheng, Bing-hua Jiang, Wen-feng Han, An-qi Ye, Pei-yun Han, Li-qiong Guo, Jun-fang Lin
Summary: This study focused on the synthesis of paclitaxel and integrated the DBAT gene into Escherichia coli. A mutant gene dbat(S189V) was obtained from a mutation library and showed improved stability. By combining protein engineering and metabolic engineering, the production of paclitaxel was significantly increased. These findings suggest a promising strategy for paclitaxel production.
FRONTIERS IN MICROBIOLOGY
(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)
