Article
Chemistry, Inorganic & Nuclear
Xiang Yu, Cong-Cong Zhao, Jian-Xia Gu, Chun-Yi Sun, Hai-Yan Zheng, Li-Kai Yan, Min Sun, Xin-Long Wang, Zhong-Min Su
Summary: Photocatalytic carbon dioxide reduction using transition-metal-modified vanadoborate clusters shows promising results, with high stability and efficiency in converting CO2 into syngas and HCOO-. The active sites and reduction mechanism were elucidated through density functional theory calculations.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Shenzhen Chang, Haiyan An, Yanhong Chen, Qingshan Zhu, Huiyun Luo, Yaohui Huang
Summary: This study reports two crystalline catalysts based on Dawson-type polyoxometalates (POMs) and metal-organic subunits, which exhibit high catalytic activity in the H2O2-based oxidation of phenols/aromatics to p-BQs. The catalysts show high conversion, selectivity, and oxidant efficiency, with catalyst 1 displaying the highest performance. The structure-activity analysis reveals that the active-site accessibility due to the supramolecular interactions between POM and Cu organic units contributes to the superior performance of catalyst 1.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Liu Jianchuan, Li Cuiyan, Liu Yaozu, Wang Yujie, Fang Qianrong
Summary: Fuel and metal-air batteries are promising alternatives to fossil fuels for sustainable and clean energy. However, improving the efficiency of the oxygen reduction reaction (ORR) is crucial. Covalent organic frameworks (COFs) have the potential to serve as efficient and stable ORR electrocatalysts, with their high crystallinity, high specific surface area, and high stability.
ACTA CHIMICA SINICA
(2023)
Article
Chemistry, Physical
Yang Liu, Chensi Tang, Min Cheng, Ming Chen, Sha Chen, Lei Lei, Yashi Chen, Huan Yi, Yukui Fu, Ling Li
Summary: POM@MOF composites have been attracting attention in photocatalysis due to their enhanced performance, which benefits from the high specific surface area and long-range ordered structure of MOFs that ensure a uniform distribution of POMs and provide more active catalytic sites.
Article
Chemistry, Physical
Raana Tajgardoon, Ali Zarnegaryan, Dawood Elhamifar
Summary: In this study, a novel organic-inorganic hybrid catalyst was synthesized by attaching polyoxometalate onto the surface of graphene oxide. The designed catalyst showed high activity, recoverability, reusability, and durability in the preparation of benzimidazoles.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Bing Zhang, Xiaojue Bai, Sha Wang, Linlin Li, Xuemin Li, Fuqiang Fan, Tieqiang Wang, Liying Zhang, Xuemin Zhang, Yunong Li, Yunling Liu, Junyi Chen, Fanbao Meng, Yu Fu
Summary: In this study, highly hydrophobic MOF/polymer composites were fabricated through a post-synthetic polymerization strategy, demonstrating superior water resistance and catalytic selectivity. This synthetic approach opens up a new pathway for designing unique catalysts with outstanding catalytic efficiency, selectivity, and stability.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Multidisciplinary Sciences
Mojtaba Amini, Younes Mousazade, Zahra Zand, Mojtaba Bagherzadeh, Mohammad Mahdi Najafpour
Summary: Ultra-small and highly dispersive iron oxide hydroxide has been characterized and shown to exhibit high efficiency and stability in chemical reactions, making it a promising catalyst with potential applications in various fields. The compound is effective for alcohol oxidation, organic sulfide oxidation, and alkene epoxidation reactions, and demonstrates good catalytic activity in water oxidation.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Wangxi Liu, Yuanqi Wang, Huiting Huang, Jun Wang, Gaoxiang He, Jianyong Feng, Tao Yu, Zhaosheng Li, Zhigang Zou
Summary: Light-driven primary amine oxidation to imines integrated with H2 production presents a promising means to simultaneous production of high-value-added fine chemicals and clean fuels. A spatial decoupling strategy is proposed to overcome the limitations of poor charge separation and uncontrolled hydrogenation. The CoP@ZnIn2S4 photocatalyst exhibits directional and ultrafast carrier separation, leading to significantly higher production rate and selectivity for the photoconversion of benzylamine to N-benzylbenzaldimine.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Biochemistry & Molecular Biology
Jie Zhao, Bingquan Wang, Rui Wang, Ivan V. Kozhevnikov, Korchak Vladimir
Summary: Amphiphilic hybrid catalysts were prepared by modifying [SMo12O40](2-) with tetrabutylammonium bromide (TBAB), 1-butyl-3-methylimidazole bromide (BMIMBr), and octadecyl trimethyl ammonium bromide (ODAB). The catalysts were characterized by various techniques and showed favorable activity for removing sulfur compounds at room temperature in model oil and actual diesel. Different catalysts exhibited varying levels of removal effect, with [TBA](2)SMo12O40 catalyst showing the best performance.
Article
Multidisciplinary Sciences
Yanyan Zhao, Sheng Dai, Ke R. Yang, Sufeng Cao, Kelly L. Materna, Hannah M. C. Lant, Li Cheng Kao, Xuefei Feng, Jinghua Guo, Gary W. Brudvig, Maria Flytzani-Stephanopoulos, Victor S. Batista, Xiaoqing Pan, Dunwei Wang
Summary: Atomically dispersed catalysts have shown high activity for selective oxidation of carbon monoxide with excess hydrogen, but their stability is not ideal. This study demonstrates that introducing a structural component to minimize the diffusion of the active metal center significantly improves stability without compromising activity. By using a dinuclear iridium heterogeneous catalyst as a study platform, two types of oxygen species, interfacial and bridge, are identified to work together for both activity and stability. This work provides important insights into the synergistic effect between the active metal center and the supporting substrate, with potential broad applications for atomically dispersed catalysts.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Physical
Zhenjie Lu, Wenzhi Luo, Xinning Huang, Huixuan Yu, Zhiwei Li, Guocheng Liu, Jianwen Liu, Xingxing Chen
Summary: This study successfully synthesized cobalt metal organic frameworks (Co-MOFs) with excellent oxygen evolution performance using a solvothermal strategy, demonstrating high electrocatalytic activity and long-term stability, which could inspire the rational design of high-performance electrocatalysts for water oxidation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Tao Fan, Man Wang, Ying Yin, Lei Fang, Hui Xu, Guocai Wu, Liangchun Li
Summary: This study presents the construction of a stable porous aromatic framework embedded with N-Hydroxyphthalimide (NHPI) organocatalytic site, establishing an ideal catalytic system that is highly efficient, recyclable, and selective. The synthesized PAF-NHPI catalyst exhibits excellent performance in the aerobic oxidation of various substances, and shows promise for practical production of fine chemicals.
Article
Engineering, Environmental
Weichen Wang, Tian Sheng, Shanshuai Chen, Zhiyu Xiang, Fangyuan Zhou, Wanbin Zhu, Hongliang Wang
Summary: Designing highly active catalysts for selective hydrodeoxygenation of lignin-derived oxygenates is important for utilizing lignin effectively. Defect engineering in metal-organic frameworks (MOFs) is a promising strategy to tailor the properties of MOFs and synthesize high-performance catalysts. In this study, a bifunctional catalyst consisting of highly dispersed Pd nanoparticles on defective NH2-MIL-53(Al) was prepared using a facile synthetic strategy. The introduction of defects generated coordinatively unsaturated metal sites, which acted as anchor points for Pd nanoparticles and active acid sites for catalytic reactions. The catalyst exhibited outstanding catalytic performance in converting vanillin and other lignin derivatives into decarbonyl products under mild conditions. Density functional theory calculations showed that the HDO reaction mainly proceeded via hydrogenation-hydrogenolysis routes, and the synergistic interaction between Pd and defective NH2-MIL-53(Al) contributed to the catalyst's high activity. The catalyst remained active after being reused 5 times. The engineering of defects in MOFs has great potential for designing novel bifunctional catalysts for lignin valorization.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Fengqian Chen, Xinyu Guan, Hui Li, Jiehua Ding, Liangkui Zhu, Bin Tang, Valentin Valtchev, Yushan Yan, Shilun Qiu, Qianrong Fang
Summary: The study introduces two 3D radical-based COFs with high efficiency and selectivity as metal-free redox catalysts for oxidizing alcohols to aldehydes or ketones. These stable COF-based catalysts exhibit outstanding catalytic performance and reusability, showing potential applications in organic synthesis and material science.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Kayaramkodath C. Ranjeesh, Sukhjot Kaur, Abdul K. Mohammed, Safa Gaber, Divyani Gupta, Khaled Badawy, Mohamed Aslam, Nirpendra Singh, Tina Skorjanc, Matjaz Finsgar, Jesus Raya, Tharamani C. Nagaiah, Dinesh Shetty
Summary: This study reports a covalent organic framework catalyst with in-situ proton filter ability, which can effectively control proton supply and enhance N2 flux for efficient nitrogen reduction reaction. The feasibility of the catalyst is further validated through molecular dynamics simulations and control experiments. These findings signify a paradigm shift in engineering high-performance NRR electrocatalysts and contribute to more feasible green NH3 production.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Kaihui Ji, Yanan Liu, Yinghua Luo, Xue Zhang, Yufan Bai, Hailong Yue, Pengtao Ma, Jingyang Niu, Jingping Wang
Summary: The development of high-efficiency photocatalysts is of vital importance in solving the problems of low efficiency and harsh conditions in organic oxidation reactions. This study successfully synthesized a novel hybrid polyoxometalate crystal, RuCd-SiW, which showed excellent photocatalytic activity for the selective oxidation of thioanisole under visible light irradiation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Ruikun Zhao, Zhendong Feng, Ying Lv, Guosong Li, Peifang Yan, Jingyang Niu, Shuang Gao
Summary: In this study, various layered double hydroxides (LDHs) and layered double oxides (LDOs) were synthesized by the co-precipitation method and evaluated as catalysts for ethylene glycol (EG) synthesis. Zn3Al-LDO exhibited the highest catalytic activity under low H2O/EC ratio and mild conditions, achieving an EG yield of 93%-99% at 100 degrees C for 3-4 h. The superior performance of Zn3Al-LDO is attributed to the absence of the memory effect and the retention of a significant number of base sites in the hydrolysis system. Catalyst recycling experiments showed that Zn3Al-LDO can maintain excellent catalytic activity after at least five cycles of calcination and activation.
Article
Chemistry, Physical
Yanan Liu, Jing Wang, Luoning Li, Sha Meng, Kaihui Ji, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: In this study, the photoinduced Baeyer-Villiger oxidation of cyclohexanone based on the Mukaiyama method was investigated for the first time. A crystalline polyoxometalate-based metal-organic framework photocatalyst, CR-SiW (12), which contains trinuclear ruthenium clusters, was used. The reaction achieved efficient conversion of cyclohexanone to epsilon-caprolactone under visible light irradiation, with a high reaction turnover number and turnover frequency, and a measured apparent quantum yield at 465 nm of 8.4%. The CR-SiW (12) catalyst exhibited high structural stability and reaction reusability.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Baijie Xu, Ruikun Zhao, Zhen Jing, Xinyi Ma, Hui Zhao, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: Three isomorphic polytungstates have been synthesized and demonstrated excellent catalytic activities in the Knoevenagel condensation reaction. Among them, catalyst 1 showed the highest reactivity, achieving a high reaction yield and TON value.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Mengnan Yang, Huafeng Li, Yao Zhang, Shiyan Ji, Wenjing Chen, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: A synchronous crystal- and microstructure-dependent strategy was used to synthesize the layered ionic crystal Na5.5H6.5[(SbW9O33)(2){WO2(OH)}(2){WO2}RuC7H3NO4]center dot 36H(2)O with organic hybrid antimoniotungstate. The layered structure consists of Na+ bridged sheets and hydrogen-bonded layers. The crystal displayed proton conductivity of 2.97 x 10(-2) S cm(-1) at 348 K and 75% RH, thanks to the interlayer confined hydrogen-bond network formed by crystal waters, organic ligands, and acidic protons.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Hanhan Chen, Kangting Zheng, Jingru Wang, Bingxue Niu, Jingping Wang, Pengtao Ma, Jingyang Niu
Summary: Two novel arsenotungstate species, [As4W48O168]36- (1a) and [As2W21O77(H2O)3]22- (2a), have been successfully isolated under a one-pot synthetic method. 1a is the second largest arsenotungstate cluster constructed from four {AsW12} clusters combined together. 2a can be described as lacunary sites of {As2W19} filled by {W2O8} units. Compounds 1 and 2 exhibit proton conductivity properties, and the conductivity value of 1 is 5.0 x 10-3 S cm-1 at 98% relative humidity and 75 degrees C. This work proves the participation of lattice water molecules and polyoxoanions in hydrogen bond formation as an effective pathway for intermolecular proton conduction.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Yanan Liu, Luoning Li, Sha Meng, Jing Wang, Qian Xu, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: Four isomorphic polyoxometalate-based metal-organic frameworks (POMOFs) were synthesized by assembling Rh-2(OAc)(4) and polyoxometalates. The synergistic effect between them enhanced the activities of POMOFs for the photocatalytic oxidative coupling of amines and alkene epoxidation. The development of visible-light-responsive, environmentally friendly, and reusable photocatalysts for organic oxidation reactions is of vital significance.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Siyu Liu, Yuzan He, Xinyi Ma, Jiayu Liu, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: A high-nuclearity carboxylic-modified heteropolyoxovanadate has been synthesized and shown to be an effective heterogeneous catalyst for the selective oxidation of diphenylmethanes.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Wenjing Chen, Huafeng Li, Yuzhen Jin, Wenjing Lei, Qingyun Bai, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: Converting solar energy into storable hydrogen energy using green photocatalytic technology is a reliable solution for the energy crisis. Polyoxometalates, with their unique electronic and structural properties, are promising photocatalysts for hydrogen production. Introducing noble metals greatly enhances their photocatalytic efficiency.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Kangting Zheng, Yunfan Zhang, Miao Zhang, Ruiyang Wang, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: In this paper, a d-methionine-bonded nanosized arsenotungstate with a highly reversible photocoloration property is reported, and it is obtained without the use of bridging lanthanide ions. The polyanion is constituted of two {As2W19O67(H2O)}(14-) building blocks and two {B-β-AsW9O33}(9-) subunits, integrated together by a {W2O4(OH)(d-Met)}(2+) and two {W3O6(H2O)(d-Met)}(5+) subclusters.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Hanhan Chen, Mingyang Zhang, Yuyan Li, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: The first Fe-implanted polyoxotantalate (POTa) with remarkable proton conduction has been synthesized by self-assembly in alkaline solution. The compound, consisting of six Lindqvist-type {Ta-6} units linked together by {Fe10.7Ta1.3}, possesses the highest nuclearity transition metal-oxygen cluster and the highest degree of polymerization in the POTa field to date.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Huafeng Li, Zelong Yuan, Wenjing Chen, Mengnan Yang, Yahao Sun, Shihao Zhang, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: Limited studies have been conducted on the synthesis of multifunctional catalysts for the redox reaction path cycle. In this study, two multifunctional Ru-containing polyoxometalate-based photocatalysts were prepared and showed superior catalytic performance. The paper also achieved a closed redox conversion cycle using a single multifunctional catalyst and discussed the relationship between catalytic active site composition and catalytic efficacy, as well as the underlying reaction mechanisms.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Review
Chemistry, Inorganic & Nuclear
Zongfei Yang, Jing Li, Jingyang Niu, Jingping Wang
Summary: Polyoxometalate (POM) chemistry has made significant progress since the discovery of molybdenum blue in 1778, with a particular focus on polyoxotantalates (POTas) in recent years. This review highlights the structural features of various types of POTas and explores their synthesis strategies and applications, especially in photocatalysis. The aim is to provide guidance for the exploration of innovative POTas with unique architectures and excellent performances.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Mengnan Yang, Yao Zhang, Shiyan Ji, Huafeng Li, Xinyi Ma, Yuzhen Jin, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: A heteropolytungstate cluster was incorporated into a layered porous framework by utilizing the hydrogen bonding ability of the ligands, resulting in a framework with multiple pore channels and high conductivity.
CHEMICAL COMMUNICATIONS
(2023)
Article
Energy & Fuels
Huafeng Li, Wenjing Chen, Yahao Sun, Zelong Yuan, Wenjing Lei, Mengnan Yang, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: This study demonstrates the successful implementation of Ru oxo cluster-based hybrid materials with electronic interaction and intermolecular hydrogen bonding, showcasing their potential in enhancing photocatalytic activity and selectivity in water splitting reactions.