检索结果-内蒙古大学图书馆

SSRN 2022年

作者： Kan, Amin Duan, Yandong Guo, Jingkuo Wu, Tianjiao Wang, Lin Zhang, Yumei Luo, Qingzhi Lu, Qiong Zhang, Yaqiang Liang, Yu Yang, Guang Zhang, Huaiyu Mu, Huiying Han, Qiqi Wang, Desong Hebei Key Laboratory of Photoelectric Control on Surface and Interface School of Sciences Hebei University of Science and Technology Shijiazhuang050018 China Institute of Computational Quantum Chemistry College of Chemistry and Materials Science Hebei Normal University Shijiazhuang050024 China Shanxi Supercomputing Center Shanxi Province Lvliang033000 China Hebei Key Laboratory of Applied Chemistry Yanshan University Qinhuangdao066004 China

Active site tuning in catalyst design is the key to improving the catalyst performance. Herein, we introduce single cobalt atoms into carbon-doped boron nitride (C-BN) and find, to our surprise, that the photocatalytic CO2 reduction site of C-BN shifts from CN3 to CB3. The catalyst Co/C-BN with new active sites exhibits excellent photocatalytic activity and selectivity of CO without adding sacrificial reagents, while the side reaction of hydrogen evolution is significantly inhibited. Theoretical calculations show that the introduced Co atom changes the spin density of the neighboring catalytic site, thus regulating the adsorption energy of the catalytic site for active intermediates (COOH*). Compared with CN3 site, CB3 in Co/C-BN shows superiority in CO* formation elementary step for the conversion of CO2 to CO, and inhibits the generation of adsorbed H2 in the competitive water-splitting reaction. This work provides valuable insights into the design of highly efficient catalysts in the future. © 2022, The Authors. All rights reserved.

关键词： Cobalt

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Cu/Nb2o5 Composite Aerogel for Co2 Hydrogenation to Methanol: Construction of Porous Structure and Abundant Active interfaces

SSRN

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SSRN 2023年

作者： Xin, Yue Li, Qi Wang, Sanmei Hu, Sunpei Wang, Liangbing State Key Laboratory for Powder Metallurgy School of Materials Science and Engineering Central South University Hunan Changsha410083 China Hefei National Research Center for Physical Sciences at the Microscale Key Laboratory of Strongly-Coupled Quantum Matter Physics Chinese Academy of Sciences National Synchrotron Radiation Laboratory Key Laboratory of Surface and Interface Chemistry and Energy Catalysis Anhui Higher Education Institutes Department of Chemical Physics University of Science and Technology of China Anhui Hefei230026 China

Catalytic conversion of CO2 offers a promising method to mitigate the green-house gas and recycle CO2 into value-added chemicals. Cu-based aerogels hold the potential as high-performance catalysts due to the three-dimensional morphology, high porosity, and self-supporting skeletons. Herein, we successfully applied Cu/Nb2O5 composite aerogel into CO2 hydrogenation, which achieved a high production rate and selectivity towards methanol. Further mechanism study demonstrated that abundant interfaces between Cu and Nb2O5 were formed throughout the porous networks of Cu/Nb2O5 aerogel, acting as the active sites for the adsorption, activation, and selective conversion of CO2. Besides, the production of methanol was via the formate pathway over Cu/Nb2O5. This work opens up an appealing approach for the design of efficient catalysts with rich active sites for hydrogenation of CO2. © 2023, The Authors. All rights reserved.

关键词： Aerogels

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Unsymmetrically N, S-Coordinated Single-Atom Cobalt with Electron Redistribution for Catalytic Hydrogenation of Quinolines

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SSRN 2022年

作者： Tang, Feiying Zhang, Guangji Wang, Liqiang Huang, Jianhan Liu, You-Nian Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science College of Chemistry and Chemical Engineering Central South University Hunan Changsha410083 China College of Chemical Engineering Xiangtan University Hunan Xiangtan411105 China Foshan Green Intelligent Manufacturing Research Institute Xiangtan University Guangdong Foshan528010 China Henan Province Industrial Technology Research Institute of Resources and Materials School of Material Science and Engineering Zhengzhou University Henan Zhengzhou450001 China

Engineering unsymmetrical coordination is an efficient strategy for improving the performance of carbon supported single-atom catalysts for diverse applications. However, the exploration of this strategy to prepare carbon supported single-atom catalysts for hydrogenation reaction is still in infancy, especially for hydrogenation of quinolines. Herein, we report a protein-metal-ion-network strategy for preparation of single-atom cobalt supported on hierarchically porous carbon (SA-Co/NSPC). SA-Co/NSPC features unsymmetrically N/S-coordinated metal center, i.e., Co1–N3S1. Moreover, the carbon matrices possess an ultra-thin two-dimensional morphology and hierarchically porous structures. SA-Co/NSPC catalyst with Co1–N3S1 active site exhibits excellent catalytic performance for hydrogenation of N-heterocycles. The DFT calculation results show that the site of Co1–N3S1 reveals a significant electron redistribution in comparison to the Co1–N4, leading to a lower H* diffusion barrier and quinoline hydrogenation reaction barrier. SA-Co/NSPC catalyst combined with the unique hierarchically porous structure and high active Co1–N3S1 owns extraordinary catalytic performance for hydrogenation of quinolines. © 2022, The Authors. All rights reserved.

关键词： Hydrogenation

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Mixed equilibrium/nonequilibrium effects govern surface mobility in polymer glasses

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arXiv 2024年

作者： Xu, Jianquan Ghanekarade, Asieh Li, Li Zhu, Huifeng Yuan, Hailin Yan, Jinsong Simmons, David S. Tsui, Ophelia K.C. Wang, Xinping School of Chemistry and Chemical Engineering Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province Zhejiang Sci-Tech University Hangzhou310018 China Department of Chemical Biological and Materials Engineering University of South Florida TampaFL33620 United States Department of Physics Hong Kong University of Science and Technology Hong Kong Special Administrative Region999077 China William Mong Institute of Nano Science and Technology Hong Kong University of Science and Technology Hong Kong Special Administrative Region999077 China

The temperature at which supercooled liquids turn into solid-like glasses (Tg) can change at the free surface, affecting the properties of nanostructured glasses and their applications. However, inadequate experimental resolution to determine the Tg gradient and a longstanding debate over the role of nonequilibrium effects have hindered fundamental understanding of this phenomenon. Using spatially resolved Tg measurements and molecular dynamics simulations, we reveal a crossover from equilibrium behavior to a new regime of near-surface nonequilibrium glass physics on cooling. This crossover causes the form of the nonequilibrium Tg gradient to change, highlighting the need to include these physics for rational understanding of the properties of realistic nanostructured glass-forming materials. They also potentially recast the interpretation of decades of experimental data on nanoconfined glasses. Copyright © 2024, The Authors. All rights reserved.

关键词： Glass

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二维材料最新研究进展

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物理化学学报 2021年第12期37卷 1-151页

作者：常诚陈伟陈也陈永华陈雨丁峰樊春海范红金范战西龚成宫勇吉何其远洪勋胡晟胡伟达黄维黄元季威李德慧李连忠李强林立凌崇益刘鸣华刘楠刘庄 Kian Ping Loh 马建民缪峰彭海琳邵明飞宋礼苏邵孙硕谭超良唐智勇王定胜王欢王金兰王欣王欣然 Andrew T.S.Wee 魏钟鸣吴宇恩吴忠帅熊杰熊启华徐伟高尹鹏曾海波曾志远翟天佑张晗张辉张其春张铁锐张翔赵立东赵美廷赵伟杰赵运宣周凯歌周兴周喻朱宏伟张华刘忠范 Institute of Science and Technology Austria Am Campus 13400 KlosterneuburgAustria Department of Chemistry National University of Singapore3 Science Drive 3117543Singapore Department of Chemistry The Chinese University of Hong KongShatinNew TerritoriesHong KongChina Key Laboratory of Flexible Electronics and Institute of Advanced Materials Nanjing Tech UniversityNanjing 211816China School of Life Sciences Shanghai UniversityShanghai 200444China Centre for Multidimensional Carbon Materials Institute for Basic ScienceUlsan 44919Korea School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore 637371Singapore Department of Chemistry City University of Hong KongKowloonHong KongChina Department of Electrical and Computer Engineering and Quantum Technology Center University of MarylandCollege ParkMaryland 20742USA School of Materials Science and Engineering Beihang UniversityBeijing 100191China Department of Materials Science and Engineering City University of Hong KongKowloonHong KongChina Center of Advanced Nanocatalysis(CAN) Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China College of Chemistry and Chemical Engineering State Key Laboratory of Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy Materials(iChEM)Xiamen UniversityXiamen361005Fujian ProvinceChina State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing100081China Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-Nano Devices Department of PhysicsRenmin University of ChinaBeijing 100872China School of Optical and Electronic Information Wuhan National Laboratory

Research on two-dimensional(2D) materials has been explosively increasing in last seventeen years in varying subjects including condensed matter physics, electronic engineering, materials science, and chemistry since the mechanical exfoliation of graphene in 2004. Starting from graphene, 2D materials now have become a big family with numerous members and diverse categories. The unique structural features and physicochemical properties of 2D materials make them one class of the most appealing candidates for a wide range of potential applications. In particular, we have seen some major breakthroughs made in the field of 2D materials in last five years not only in developing novel synthetic methods and exploring new structures/properties but also in identifying innovative applications and pushing forward commercialisation. In this review, we provide a critical summary on the recent progress made in the field of 2D materials with a particular focus on last five years. After a brief backgroundintroduction, we first discuss the major synthetic methods for 2D materials, including the mechanical exfoliation, liquid exfoliation, vapor phase deposition, and wet-chemical synthesis as well as phase engineering of 2D materials belonging to the field of phase engineering of nanomaterials(PEN). We then introduce the superconducting/optical/magnetic properties and chirality of 2D materials along with newly emerging magic angle 2D superlattices. Following that, the promising applications of 2D materials in electronics, optoelectronics, catalysis, energy storage, solar cells, biomedicine, sensors, environments, etc. are described sequentially. Thereafter, we present the theoretic calculations and simulations of 2D materials. Finally, after concluding the current progress, we provide some personal discussions on the existing challenges and future outlooks in this rapidly developing field.

关键词： Two-dimensional materials Transition metal dichalcogenides Phase engineering of nanomaterials Electronics Optoelectronics Catalysis Energy storage and conversion

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Bamboo Derived Activated Carbon as Highly Efficient Catalysts for the Oxidation and Adsorption of Hydrogen Sulfide at Room Temperature

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SSRN 2023年

作者： Du, Shi Liu, Xin Liu, Yue Wang, Junhao Liu, Dongxu Yang, Jianxiao Zhang, Xin College of Resources and Environment University of Chinese Academy of Sciences Beijing101408 China Yanshan Earth Critical Zone and Surface Fluxes Research Station University of Chinese Academy of Sciences Beijing101408 China Department of Environmental Engineering College of Biology and the Environment Nanjing Forestry University Nanjing210037 China Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology College of Materials Science and Engineering Hunan University Changsha410082 China

A series of bamboo derived activated carbon (BAC) with different activation degree were prepared and tested for H2S catalytic oxidation-adsorption at room temperature. It was found that the specific surface area, pore size and defect level increased with the increase in activation degree. Besides, abundant of weak basic sites and oxygen vacancies were existed on the catalyst surface. The highest sulfur capacity (Qs)can be obtained for Na/BAC-8, which can attach 0.73g/g. And the Qs was directly related to the total pore volume and specific surface area. Meanwhile, the final sulfate and elemental sulfur products were mainly formed in small micropores ( © 2023, The Authors. All rights reserved.

关键词： Activated carbon

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Modulation of Mo-Fe-C sites over mesoscale diffusion-enhanced hollow sub-micro reactors toward boosted electrochemical water oxidation

Research Square

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Research Square 2021年

作者： Gong, Feilong Liu, Mengmeng Gong, Lihua Ye, Sheng Jiang, Qike Zeng, Guang Zhang, Xiaoli Peng, Zhikun Zhang, Yonghui Fang, Shaoming Liu, Jian Key Laboratory of Surface and Interface Science and Technology of Henan Province College of Material and Chemical Engineering Zhengzhou University of Light Industry Henan Zhengzhou450001 China State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Liaoning Dalian116023 China DICP-Surrey Joint Centre for Future Materials Department of Chemical and Process Engineering Advanced Technology Institute University of Surrey Guildford SurreyGU2 7XH United Kingdom Department of Applied Chemistry Anhui Agricultural University Hefei230036 China Henan Institutes of Advanced Technology State Centre for International Cooperation on Designer Low-Carbon & Environmental Materials School of Materials Science and Engineering Zhengzhou University Zhengzhou450001 China

Simultaneously engineering the mesoscale mass transfer and surface reactions on the electrode can promote the kinetics of oxygen evolution reaction (OER). Herein, we report the simultaneously modulation of the mesoscale diffusion and Mo-Fe-C sites formation over monodispersed hollow Fe@MoS2-C sub-micro reactors for boosted OER performance. According to finite element simulation and analysis, the hollow nanostructured MoS2-C host possessed much better mesoscale diffusion properties than its solid and yolk–shell counterparts. Notably, the sulfur vacancies and intercalated carbon in the sub-micro reactor offered a unique microenvironment for Fe anchoring on Mo-Fe-C sites. The stability and activity of the sites were revealed by theoretical calculations. The resultant Fe@MoS2-C presented an OER overpotential of 194 mV, which is much better than those of the Fe-based single-atom catalysts reported to data. Our monodispersed sub-micro reactor combined the advantage of mesoscale diffusion and single-atom sites, and it may have broad prospects for complex electrocatalytic reactions. © 2021, CC BY.

关键词： Molybdenum compounds

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[email protected] 2 O 3 anchored on porous graphene prepared by solvothermal method as a high-performance anode material for potassium-ion batteries

引用

Journal of Alloys and Compounds 2023年 939卷

作者： Wenna Li Nengshuang Gao Hechen Li Ruicong Sun Qingquan Liu Bin Huang Quanqi Chen Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials College of Chemistry and Bioengineering Guilin University of Technology Guilin 541004 China Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion Hunan University of Science and Technology Xiangtan 411201 China Guangxi Colleges and Universities Key Laboratory of Surface And Interface Electrochemistry College of Chemistry and Bioengineering Guilin University of Technology Guilin 541004 China

To enhance potassium storage performance of graphene, in situ formed electroactive bismuth nanoparticles were introduced into the porous graphene. The [email protected] 2 O 3 /graphene composites, which possess the special microstructure that Bi nanoparticles are coated by Bi 2 O 3 and attached to the porous graphene, was synthesized via an environmental-friendly and simple solvothermal method combined with high-temperature sintering under inert environment using graphene oxide, BiCl 3 and ethanol as raw materials. Benefiting from the special microstructure and synergistic effect of nano-bismuth particles and graphene, [email protected] 2 O 3 /graphene composites display better electrochemical performance than graphene. Between 0.01 and 3.0 V (vs K + /K), the electrode was galvanostatically discharged/charged at 100 mA g −1 and the optimal [email protected] 2 O 3 /graphene composite ( [email protected] 2 O 3 /G-50) has large initial charge capacity (886.4 mAh g −1 ), which is significantly larger than the theoretic capacities of Bi (385 mAh g −1 ) and graphene (279 mAh g −1 ), and after 100 cycles, the high remaining charge capacity of 466.4 mAh g −1 for [email protected] 2 O 3 /G-50 was obtained. While the remaining charge capacity of graphene is only 112 mAh g −1 after 100 cycles. When electrode cycled at high current density of 800 mA g −1 , the initial charge capacities of [email protected] 2 O 3 /G-50 and graphene are 294.1 and 130 mAh g −1 , respectively, and the corresponding remaining capacities are 179.1 and 67.1 mAh g −1 , respectively. The results imply that the introduction of high-capacity electroactive materials and the design of special microstructures are effective strategies to significantly improve the potassium storage performance of carbon-based anode materials for potassium-ion batteries.

关键词：

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Photocatalytic Conversion of Methane: Recent Advancements and Prospects

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Angewandte Chemie 2021年第2期134卷

作者： Qi Li Yuxing Ouyang Dr. Hongliang Li Prof. Liangbing Wang Prof. Jie Zeng State Key Laboratory for Powder Metallurgy School of Materials Science and Engineering Central South University Changsha Hunan 410083 P. R. China Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes Department of Chemical Physics University of Science and Technology of China Hefei Anhui 230026 P. R. China

Abundant and affordable methane is not only a high-quality fossil fuel, it is also a raw material for the synthesis of value-added chemicals. Solar-energy-driven conversion of methane offers a promising approach to directly transform methane to valuable energy sources under mild conditions, but remains a great challenge at present. In this Review, recent advances in the photocatalytic conversion of methane are systematically summarized. Insights into the construction of effective semiconductor-based photocatalysts from the perspective of light-absorption units and active centers are highlighted and discussed in detail. The performance of various photocatalysts in the conversion of methane is presented, with the photooxidation classified according to the oxidant systems. Lastly, challenges and future perspectives in the photocatalytic oxidation of methane are described.

关键词： activation methane oxidation photocatalysis semiconductors

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Corrigendum to “The second network of soft-nanoparticles in linear polymers of the same chemistry” [Polymer 283 (2023) 126216]

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Polymer 2023年 285卷

作者： Xikai Ouyang Jintian Luo Tao Li Yihui Zhu Wancheng Yu Jinlin He Pengfei Zhang GengXin Liu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimension Materials College of Material Science and Engineering Donghua University Shanghai 201620 China School of Chemistry and Chemical Engineering Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province Zhejiang Sci-Tech University Hangzhou 310018 China State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Soochow University Suzhou 215123 China College of Chemistry Chemical Engineering and Materials Science Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis Soochow University Suzhou Jiangsu 215123 China National Synchrotron Radiation Laboratory Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film CAS Key Laboratory of Soft Matter Chemistry University of Science and Technology of China Hefei 230026 China

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