Article
Chemistry, Multidisciplinary
Victor Deboos, Carla Calabrese, Jean-Marc Giraudon, Rino Morent, Nathalie De Geyter, Leonarda Francesca Liotta, Jean-Francois Lamonier
Summary: Cu (10 wt%) materials were prepared on silica nanotubes via two synthetic approaches, co-synthesis and wetness impregnation. The Cu-based silica nanotubes showed the best performance in toluene oxidation, with a lower T-50 (306 °C) compared to the reference catalyst (345 °C). The excellent catalytic properties were attributed to the finely dispersed copper (II) species on the surface of silica nanotubes.
Article
Chemistry, Physical
Yewei Ren, Xue Lei, Hui Wang, Jianping Xiao, Zhenping Qu
Summary: Modulating the activity of oxygen species in transition metal oxide catalysts is crucial for environmental catalytic oxidation reactions. In this work, the mobility of lattice oxygen and activation ability of gas oxygen over CoMn2O4 were effectively regulated by in situ solvothermal-induced lanthanum doping, leading to enhanced VOCs oxidation activity. The introduction of lanthanum species into the spinel lattice significantly increased the oxygen vacancies and weakened the metal-oxygen bond strength, resulting in higher mobility and reactivity of lattice oxygen and improved conversion of toluene to CO2 and H2O.
Article
Chemistry, Physical
Parag M. M. Shah, Liam A. A. Bailey, David J. J. Morgan, Stuart H. H. Taylor
Summary: Iron-manganese mixed metal oxide catalysts with different Fe:Mn ratios were synthesized and evaluated for total propane oxidation. The Fe0.50Mn0.50Ox catalyst showed the highest activity due to increased surface area and the formation of a Mn2O3 phase. The choice of precipitating agent was found to affect the activity, with the hydroxide-precipitated catalysts generally being more active.
Article
Engineering, Environmental
Yang Liu, Xiao Zhou, Jingjing Zhan, Xuwang Zhang, Hao-Yu Lian, Hao Zhou, Xianliang Yi, Huan-Huan Yang, Jiajia Shan
Summary: Facile structural modification of α-MnO2 through single incorporation of Ag element enhances the efficiency of benzene oxidation. Ag+ ions partially replace K+ ions in the MnO2 structure, leading to lower crystallinity, smaller crystallite, and distorted lattice arrangement. Electron transfer from Ag+ to lattice oxygen weakens Mn-O bonds, increasing the mobility of bulk lattice oxygen. This results in a larger number of surface lattice oxygen and improved reactivity of surface adsorbed and lattice oxygen, promoting complete conversion of benzene to CO2.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Yang Liu, Huan-Huan Yang, Hao Zhou, Xianliang Yi, Jingjing Zhan
Summary: The incorporation of Ce and Sn elements into α-MnO2 parent was attempted to improve catalytic benzene oxidation performance. Ce doping caused lattice distortion and increased Mn3+ content, facilitating oxygen vacancy formation. Sn deposition on CeMn substrate induced strong metal support interaction, promoting the construction of active oxygen vacancies. This methodology offers high mineralization and avoids moisture-aroused inactivation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Yin Zhang, Yuanzhi Li, Jichun Wu, Huamin Cao, Long Zhang
Summary: La-doped manganese oxide catalysts with nanorod morphology and cryptomelane octahedral molecular sieve structure showed significantly enhanced photothermocatalytic activity and reduced acetaldehyde selectivity for the oxidation of ethyl acetate. Among the catalysts, La-OMS-2-B exhibited the highest activity and selectivity, even under infrared illumination. The enhancement in catalytic performance was attributed to the promotion of thermocatalytic activity and improved oxygen activity of OMS-2 by La doping.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Young Jin Sa, Sohee Kim, Yesol Lee, Ji Man Kim, Sang Hoon Joo
Summary: In this study, four different mesoporous manganese oxides were synthesized and used as model catalysts to investigate the effects of local structures and Mn valence states on the activity of oxygen electrocatalysis. The results showed that for the oxygen reduction reaction, m-Mn2O3 exhibited the highest activity, followed by m-MnO2, m-MnO, and m-Mn3O4. For the oxygen evolution reaction, m-MnO2 showed the highest activity, followed by m-Mn2O3, while m-MnO and m-Mn3O4 had lower activity. These findings suggest that high-valent Mn species and disordered atomic arrangements induced by nanostructuring significantly affect electrocatalysis.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Xiangping Li, Jianguang Zhang, Yanshi Zhang, Bin Liu, Peng Liang
Summary: With the acceleration of industrialization and urbanization, the emission of volatile organic compounds (VOCs) has become a serious problem, and it is urgent to develop efficient methods to eliminate them. Manganese-based catalysts, as a kind of non-noble catalysts, have been widely used in VOCs treatment, especially in catalytic oxidation for VOCs abatement, due to their high catalytic activity, strong stability, and low cost. The structure and composition of manganese-based catalysts play a crucial role in the catalytic oxidation of VOCs, and factors such as specific surface area, oxygen vacancies, reactive oxygen species, and acid sites are important for VOCs oxidation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Akbar Mohammadi Zardkhoshoui, Bahareh Ameri, Saied Saeed Hosseiny Davarani
Summary: Mixed metal selenides have attractive structural characteristics and unique physicochemical properties, making them promising electrode materials for energy storage devices. Multi-shelled nickel-manganese selenide hollow spheres and double-shell nickel-iron selenide hollow spheres were successfully fabricated for supercapacitors, demonstrating excellent electrochemical performance and desirable longevity.
Article
Chemistry, Physical
Sai Luo, Xiaoguang Zhao, Yakun Qu, Lixin Wang, Bin Zhou, Wenzhe Si, Wei Fang
Summary: In this study, NAP-XPS was used to investigate the work function and element valence of the catalyst surface. Through DFT calculation, EELS, and specially designed O2-TPD characterization, it was demonstrated that generating oxygen vacancies led to a decrease in the average valence state of Mn elements from Mn4+ to less active Mn3+. Activity data of various VOCs suggest that generating a large number of oxygen vacancies could not enhance the activity of all types of VOC; for toluene oxidation, replenishing gas-phase oxygen into the bulk phase is also important. This work provides a novel way to explore the metal oxides' material exchange properties between its surface and gaseous oxygen and paves the way for the rational development of novel and versatile VOC oxidation catalysts.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Yijia Cao, Chi Zhang, Dehua Xu, Xian Ouyang, Ye Wang, Li Lv, Tao Zhang, Shengwei Tang, Wenxiang Tang
Summary: The synergistic interaction of MnOx-CeO2 heterointerface structure improves the toluene adsorption and catalytic oxidation performance. The interaction of Mn-Ce reduces the strength of the Ce-O bond and promotes the activation of oxygen. The novel MnOx-CeO2 catalyst exhibits excellent stability and retains low-temperature activity even after thermal aging.
INORGANIC CHEMISTRY
(2022)
Article
Energy & Fuels
Rasika Mane, Heesu Kim, Kyeongwon Han, Kyoung-Jin Kim, Sang Soo Lee, Hyun-Seog Roh, Chanmin Lee, Yukwon Jeon
Summary: In order to effectively reduce PM2.5 emissions from industry and transportation, it is important to understand catalytic soot oxidation and its mechanism. This study investigates the synergistic effect of the Mn physicochemical structure on the soot oxidation activity of Ti-based oxide catalysts. The presence of Mn3+ oxidation state and an optimal combination of surface adsorbed and lattice oxygen species were found to significantly enhance the soot oxidation activity.
Article
Chemistry, Physical
Jiaqin He, Fangfang Zheng, Yuanbo Zhou, Xunxun Li, Yaru Wang, Jun Xiao, Youyong Li, Dongyun Chen, Jianmei Lu
Summary: A series of 3D@2D constructed Al2O3@CoMn2O4 microspheres with a hollow hierarchical structure supporting Pd nanoparticles were successfully synthesized. The catalyst exhibited excellent catalytic activity, high stability, water-resistance, and low-cost, making it a promising candidate for VOC combustion. The introduction of hollow Al2O3 and in situ growth of 2D CMO spinel materials in the microspheres resulted in a well-defined core-shell hollow hierarchical structure with larger specific surface area and promoted catalytic activity. The optimum catalyst showed the lowest apparent activation energy for toluene and achieved 100% conversion of toluene, benzene, and ethyl acetate at relatively low temperatures.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Weidong Zhang, Yong Zhou, Mariya Shamzhy, Sidonia Molitorisova, Maksym Opanasenko, Anne Giroir-Fendler
Summary: Supported Co3O4 catalysts were designed and prepared, with MCM-22 identified as the optimal support. Increasing Si/Al ratio and decreasing external surface area of MCM-22 were found to positively affect the activity of the catalysts, which is determined by their low-temperature reducibility. Additionally, the activity of Co/MCM-22 catalysts increased with cobalt content.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Yungang Wang, Xu Liang, Yanjun Dai, Li Zou, Dou Sun, Feixiang Li
Summary: In this study, a composite metal oxide catalyst Cu-x-Mn-y/SBA-15 was prepared by loading Cu and Mn on SBA-15 molecular sieve, and its catalytic performance in VOCs treatment was investigated. The results showed that the catalyst exhibited excellent catalytic activity and stability, achieving high toluene conversion rate.
Article
Chemistry, Inorganic & Nuclear
Ying Wang, Fuyang Liu, Ying Ji, Min Yang, Wei Liu, Wei Wang, Qiushi Sun, Ziqing Zhang, Xudong Zhao, Xiaoyang Liu
DALTON TRANSACTIONS
(2015)
Article
Chemistry, Inorganic & Nuclear
Wei Liu, Ying Ji, Ying Wang, Qiushi Sun, Xudong Zhao, Xiaoyang Liu, Xiaopeng Jia
DALTON TRANSACTIONS
(2016)
Article
Chemistry, Inorganic & Nuclear
Xuejun Zhang, Heng Zhao, Zhongxian Song, Jinggang Zhao, Zi'ang Ma, Min Zhao, Yun Xing, Peipei Zhang, Noritatsu Tsubaki
TRANSITION METAL CHEMISTRY
(2019)
Article
Chemistry, Physical
Xuejun Zhang, Zi'ang Ma, Zhongxian Song, Heng Zhao, Wei Liu, Min Zhao, Jinggang Zhao
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Chemistry, Physical
Xuejun Zhang, Jinggang Zhao, Zhongxian Song, Heng Zhao, Wei Liu, Zi'ang Ma, Min Zhao, Baolin Zhao
REACTION KINETICS MECHANISMS AND CATALYSIS
(2019)
Article
Chemistry, Physical
Xuejun Zhang, Heng Zhao, Zhongxian Song, Wei Liu, Jinggang Zhao, Zi'ang Ma, Min Zhao, Yun Xing
APPLIED SURFACE SCIENCE
(2019)
Article
Chemistry, Physical
Wei Liu, Rui Liu, Xuejun Zhang
APPLIED SURFACE SCIENCE
(2020)
Article
Chemistry, Physical
Xuejun Zhang, Jinggang Zhao, Zhongxian Song, Wei Liu, Heng Zhao, Min Zhao, Yun Xing, Ziang Ma, Huixian Du
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2020)
Article
Chemistry, Physical
Wei Liu, Rui Liu, Hanyu Zhang, Quan Jin, Zhongxian Song, Xuejun Zhang
APPLIED CATALYSIS A-GENERAL
(2020)
Article
Chemistry, Applied
Zhenzhen Huang, Jinggang Zhao, Zhongxian Song, Wei Liu, Xuejun Zhang, Yanli Mao, Heng Zhao, Min Zhao, Shuixia Liu, Zhaodong Wang
APPLIED ORGANOMETALLIC CHEMISTRY
(2020)
Article
Chemistry, Applied
Wei Liu, Jiaying Fan, Zhongxian Song, Xuejun Zhang
Summary: Modifying Co(3)O(4) through a combination of structural template and Ce dopant can significantly improve its catalytic performance, leading to the superior catalytic performance of mesoporous CexCoO catalysts. Among them, Ce0.05CoO performs the best, achieving a toluene conversion rate of 90% at 238 degrees Celsius, which is maintained above 90% during 100 hours.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Applied
Xi Chen, Shuning Zhang, Wei Liu, Ruoyang Cui, Shuchen Liu, Yang Feng, Xuejun Zhang
Summary: Through characterization and performance testing of manganese oxide catalysts, it was found that lattice oxygen migration plays a more important role than adsorbed oxygen content in the purification of volatile organic compounds. This provides a new perspective for the preparation of manganese-based catalysts with promising catalytic behaviors.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Wei Liu, Huimin Zhu, Shan Jiang, Xuejun Zhang, Zhongxian Song
Summary: In this study, a core-shell like Au@Cu-MnO2 nanomaterial was synthesized and utilized for the catalytic removal of volatile organic compounds (VOCs). The core-shell structure was confirmed by powder X-ray diffraction, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Moreover, the results of H2-TPR and O2-TPD experiments demonstrated its enhanced reducibility and abundant adsorbed oxygen species, leading to excellent activity and stability in the deep oxidation of toluene.
Article
Chemistry, Multidisciplinary
Xuejun Zhang, Min Zhao, Zhongxian Song, Heng Zhao, Wei Liu, Jinggang Zhao, Zi'ang Ma, Yun Xing
NEW JOURNAL OF CHEMISTRY
(2019)
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)
