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Catalysis Today 2022年 405-406卷 82-91页

作者： Jia-Min Lyu Shen Yu Zhao Peng Jian Zhou Zhan Liu Xiao-Yun Li Yu-Li Li-Hua Chen Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China State Key Laboratory of Green Chemical Engineering and Industrial Catalysis Shanghai Research Institute of Petrochemical Technology SINOPEC Shanghai 201208 China State Key Laboratory of Silicate Materials for Architecture Wuhan University of Technology Wuhan 430070 Hubei China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur Namur B-5000 Namur Belgium

Bifunctional catalysts are widely applied for many important reactions as the synergetic effect of two types of active sites remarkably improves catalysis performance. However, their bifunctionality has not been fully exploited since the proximity of bifunctional catalysts is hard to control. Herein, we demonstrate a bifunctional [email protected] 2 O 3 catalyst with a core-shell structure and a nano-scale proximity by in-situ growth of γ-Al 2 O 3 nanosheets on the surface of ZSM-5 crystals for methanol conversion. The nano-scale proximity endows the catalyst with higher reaction activity and C 2 –C 3 olefins yield (53 %) in comparison to the catalysts with micro-scale proximity (20 %) and millimeter-scale proximity (27 %), which can be attributed to the fluent transport of the reaction intermediates between two types of active sites. This strategy for constructing bifunctional catalysts with nano-scale proximity is conducive to understanding the relationship between proximity and catalytic performance in methanol conversion.

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Fabrication of Graphite Nanosheets Decorated with Ni-Mofs for High Performance Supercapacitor Electrode materials

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SSRN 2023年

作者： Wang, Jia-Wei Meng, Tian-Li Ma, Ying-Xia Lei, Lei Li, Jing Ran, Fen State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science & Engineering Lanzhou University of Technology Lanzhou730050 China

Metal-organic frameworks (MOFs) with a periodic network structure are formed by self-assembled coordination links between one or more metal centers and organic ligands. In recent years, MOFs as electrode materials for supercapacitors have been favored by researchers due to the tunable pore sizes, high surface area, and abundant active sites. However, the disadvantages of MOFs such as poor electrical conductivity and electrochemical stability limit their further application. In this work, nickel MOFs (Ni-MOFs) were grown in situ on graphite nanosheets (GNS) to form GNS decorated with Ni-MOFs (Ni-MOFs/GNS) by one-pot solvothermal method. The electrochemical properties of the Ni-MOFs/GNS as electrode materials could be tuned by adjusting the amount of GNS and the experimental conditions to regulate the structures. Moreover, Ni-MOFs grown in situ in GNS could improve the conductivity and dispersion of Ni-MOFs to avoid the aggregation. The results indicated that the specific capacity of the Ni-MOFs/GNS electrode materials obtained at the optimal experimental conditions was 737 C g-1 at 1 A g-1, and the capacity retention rate reached 71% after 5000 cycles. The fabrication strategy of the Ni-MOFs/GNS can be extended to synthesize other functional materials. © 2023, The Authors. All rights reserved.

关键词： Organometallics

Comprehensive Performance Evaluation of Air-Assisted Atomization Humidification for High-Power Fuel Cell Systems

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SSRN 2024年

作者： Huang, Yiyuan Luo, Maji Jiang, Kun Wang, Chuan Tu, Faping Huang, Miaohua School of Automotive Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Luoshi Road 122# Wuhan430070 China Wuhan HydraV Fuel Cell Tech Co. Ltd. Hubei 430090 China

Membrane humidification is the most prevalent method used to humidify the fuel cell system of commercial vehicles. However, this passive approach meets only the humidity requirements. In order to simultaneously address the issues of humidification and cooling associated with high-power fuel cell systems，air-assisted atomization humidification (AAAH) is proposed as an active technology. However, there are not enough experiments to analyze the adaptation of AAAH. In this study, the sensitivity of AAAH is evaluated under high-power load conditions and then compared with that of membrane humidification (MH) under various operating scenarios. Experimental results show a positive correlation between the relative humidity of inlet air and the pressure of spray with AAAH. Moreover, this technology achieves higher relative humidity of inlet air and water recovery rate than those obtained by MH, enhancing the stack performance and system efficiency and reducing system thermal load. At the rated current of 540A, the system efficiency can reach up to 44.8%, reducing the thermal load ratio to 87.4%. Although the humidity fluctuates in the range of 26.3% to 53.2% under variable load conditions, with a response time of 41 seconds, which is longer than that of MH, the fluctuations are within an acceptable limit considering the stack performance. Finally, a control strategy based on the proportion of liquid water is applied to satisfy the self-circulation of humidified water. © 2024, The Authors. All rights reserved.

关键词： Thermal load

Effect of Al(Oh)3 on the Properties of Silicon-Based Ceramic Cores Prepared by Laser Powder Bed Fusion Combined with Vacuum Infiltration

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SSRN 2024年

作者： Liu, Heng Zhang, Ren-Zhong Wu, Jia-Min Li, Wei-Kang Zhou, Shi-Xiang Yan, Chun-Ze Wen, Shi-Feng Ye, Chun-Sheng Zheng, Wen Shi, Yu-Sheng Chen, Chao-Yue Ren, Zhong-Ming Zhang, Jie State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China Engineering Research Center of Ceramic Materials for Additive Manufacturing Ministry of Education Wuhan430074 China Wenzhou Key Laboratory of Microwave Communication Materials and Devices Wenzhou Advanced Manufacturing Institute of HUST Wenzhou325035 China State Key Laboratory of Advanced Special Steels School of Materials Science and Engineering Shanghai University Shanghai200444 China

Silicon-based ceramic cores with low coefficients of thermal expansion, low sintering temperatures, and excellent acid and alkali leaching capabilities are indispensable materials in the production of hollow blades. However, the mechanical properties of these materials are not ideal, and there are many challenges in processing them. In this study, silicon-based ceramic cores were prepared using a combination of vacuum infiltration (VI) and laser powder bed fusion (LPBF) techniques. Al(OH)3 was employed as a mineralizer to enhance post-sintering mechanical properties and improve the efficiency of vacuum infiltration, thereby enhancing the overall performance of the silicon-based ceramic cores. The VI process enabled nano-SiO2 to penetrate the sample, increasing its density and promoting cristobalite formation during sintering at 1225°C. Furthermore, Al(OH)3 powder enhanced ambient temperature flexural strength by reducing microcracks, inhibiting excessive cristobalite transformation, and improving the VI process. By optimizing the Al(OH)3 content and refining the VI procedure, significant improvements in the microstructure and properties of silicon-based ceramic cores were achieved. Following three rounds of vacuum infiltration and the incorporation of 4 wt.% Al(OH)3, the samples demonstrated a high-temperature creep of 0.17 mm, with flexural strengths of 15.23 MPa at room temperature and 23.55 MPa at high temperature. © 2024, The Authors. All rights reserved.

关键词： Bending strength

The Enhanced Cohesive Performance of Magnetron Sputtered Cr Coatings on Steel Substrate via Controlling Columnar Grain Structures

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SSRN 2024年

作者： Liu, Wenxin Xu, Zhigang Geng, Xuehao Liu, Long Peng, Jian Shen, Qiang Wang, Chuanbin State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Chaozhou Branch Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China Inner Mongolia North Heavy Industries Group Limited Company Nanjing Institute Nanjing210049 China

Enhancing the cohesion of Cr coatings is essential for preventing cracking and prolonging their durability in service. This study focuses on investigating the impact of columnar grain structures on the cohesive strength of the Cr coating on steel substrate. The systematic variation in deposition time during the magnetron sputtering process significantly affected the columnar grain structures, surface roughness, residual stress, and cohesive strength of Cr coatings. The results revealed that all Cr coatings exhibited preferred orientations along the (211) plane. As the deposition time increased from 1 to 4 h, the columnar grain size and surface roughness of Cr coatings progressively increased, while the residual compressive stress demonstrated a gradual decline. The cohesion strengths of the coating initially rose and then declined. Notably, the columnar grain size of approximately 700 nm achieved the best cohesion for Cr coatings on stainless steel, attributed to the combined effects of residual stress and surface roughness. This study underscores the significance of adjusting coating columnar grain structures to improve cohesion and offers valuable insights for the development of advanced hard coatings. © 2024, The Authors. All rights reserved.

关键词： Surface roughness

Major strategies for improving the performance of perovskite solar cells

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iEnergy 2023年第3期2卷 172-199页

作者： Lixiu Zhang Hang Li Kai Zhang Wenzhe Li Chuantian Zuo George Omololu Odunmbaku Jingde Chen Cong Chen Luozheng Zhang Ru Li Yuping Gao Baomin Xu Jiangzhao Chen Yongsheng Liu Yang Wang Yanlin Song Jianxin Tang Feng Gao Qing Zhao Yong Peng Mingzhen Liu Lei Tao Yuelong Li Zhimin Fang Ming Cheng Kuan Sun Dewei Zhao Yixin Zhao Shihe Yang Chenyi Yi Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China State Key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084China Shenzhen Graduate School Peking UniversityShenzhen 518055China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China College of Materials Science and Engineering&Engineering Research Center of Alternative Energy Materials&Devices Sichuan UniversityChengdu 610065China School of Energy&Power Engineer-ing Chongqing UniversityChongqing 400044China Institute for Energy Research Jiangsu UniversityZhenjiang 212013China Institute of New Energy Technology Department of Electronic EngineeringCollege of Information Science and TechnologyJinan UniversityGuangzhou 510631China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China College of Optoelectronic Engineering Chongqing UniversityChongqing 400044China College of Chemistry Nankai UniversityTianjin 300071China Institute of Chemistry Chinese Academy of SciencesBeijing 100190China State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelec-tronics School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Institute of Photoelectronic Thin Film Devices and Technology Nankai UniversityTianjin 300350China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119China

Metal halide perovskite solar cell(PSC)has successfully distinguished itself in optoelectronic field by virtue of the sharp rise in power conversion efficiency over the past *** remarkable efficiency breakthrough at such a fast speed can be mainly attributed to the comprehensive study on film deposition techniques,especially the effective management of surface and interfacial defects in recent ***,we summarized the current trends in performance enhancement for PSCs,with a focus on the generally applicable strategies in high-performance works,involving deposition methods,compositional engineering,additive engineering,crystallization manipulation,charge transport material selection,interfacial passivation,optical coupling effect and constructing tandem solar *** directions and perspectives are also provided.

关键词： Perovskite solar cells efficiency improvement strategies milestones

Nitric oxide-generating self-assembling peptide hydrogel coating for enhancing hemocompatibility of blood-contacting devices

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Journal of materials Science & technology 2022年第36期131卷 106-114页

作者： Hao Li Qianru Guo Qiufen Tu Kaiqin Xiong Wei Wang Lei Lu Wentai Zhang Nan Huang Zhilu Yang Key Laboratory of Advanced Technology for Materials of Education Ministry School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Affiliated Dongguan People’s Hospital Southern Medical UniversityDongguan 523059China State Key Laboratory of Molecular Engineering of Polymers(Fudan University) Shanghai 200438China Department of Cardiology Zigong First People’s HospitalZigong 643000China School&Hospital of Stomatology Wenzhou Medical UniversityWenzhou 325035China Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs School of Life Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Guangdong Provincial Key Laboratory of Shock and Microcirculation Guangzhou 510080China

Thrombosis is the major stumbling block to the clinical application of blood-contacting ***,a quick and easy surface engineering strategy of hydrogel coating with the therapeutic gas nitric oxide(NO)generation was reported to realize up-regulation of cyclic guanosine monophosphate(c GMP)and improve hemocompatibility for diverse metal *** first introduce the active centre selenocysteine of glutathione peroxidase(GPx)to the self-assembling peptide(RADA)4,obtaining a functionalized *** the hydrogel is directly coated on the 316L stainless steel(SS)for catalytically generating NO from endogenous s-nitrosothiols(RSNO).The generated NO endows the coated surface with regulation of platelet behavior and reduction of plasmatic coagulation activation and complement system activation,hence improving antithrombotic ability in vitro and ex ***,our NO-generating hydrogel coating surface engineering strategy provides a novel solution to remove the obstacle about thrombosis of blood-contacting devices in clinic.

关键词： Blood-contacting device NO generation Self-assembling peptide Hydrogel coating Antithrombotic ability

Lubricating Behavior of Gallium-Based Liquid Metal for Cu/Al Tribo-Pair

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SSRN 2024年

作者： Ma, Jiqiang Zhang, Xuhu Guo, Jie Tan, Hui Cheng, Jun Zhu, Shengyu Yang, Jun State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai264006 China

Gallium-based liquid metal (GLM) is an emerging lubricant. This work investigates the tribological behavior of GLM for Cu/Al tribo-pair. It is found that with GLM lubrication, the friction coefficient of the Cu/Al tribo-pair is reduced by approximately 1.5 to 3 times, and the wear rate of the Cu alloy is also reduced by about 4 to 16 times, compared to dry friction. Furthermore, under high-speed and high-load conditions, the lubrication effect of GLM for the Cu/Al tribo-pair is particularly prominent. GLM provided fluid lubrication for the Cu/Al tribo-pair, and the formation of a gallium-aluminum metal film on the worn surface effectively prevents the direct contact of tribo-pair, thereby reducing friction and wear. © 2024, The Authors. All rights reserved.

关键词： Liquid metals

Microstructure characteristics induced brittleness of hot isostatic pressing (HIP) diffusion bonded Ni60A hardfacing layer

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Journal of materials Research and technology 2025年 36卷 9360-9368页

作者： Lei Yu Rui Cao Zhengyi Jiang Yingjie Yan Jinyuan Ma Wanlin Zhao Lisong Zhu Fanghui Jia State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal Lanzhou University of Technology Lanzhou 730050 China School of Materials Science and Engineering Lanzhou University of Technology Lanzhou 730050 China School of Mechanical Materials Mechatronic and Biomedical Engineering University of Wollongong NSW 2522 Australia Advanced Technology & Materials Co. Ltd. Beijing 100081 China Hebei Hot Isostatic Pressing Technology Innovation Center Zhuozhou 072750 China

The fracture behavior of the hot isostatic pressing (HIP) diffusion bonded Ni60A hardfacing layer was evaluated by macro-indentation and uniaxial tensile methods. The macro-indentation fracture toughness (K IC = 15.5 MPa m 1/2 ) and the tensile engineering strain (ԑ E = 0.29 %) results show obvious brittleness of the HIP diffusion bonded Ni60A hardfacing layer. Microstructure, nanomechanical properties and fractographic examinations were used to reveal brittleness of the hardfacing layer. On the one hand, the microstructure of the hardfacing layer is comprised of high-volume fractions of brittle silicide, carbide, and boride phases. The volume fraction of plastic nickel-phase regions is merely 22.9 %, and these nickel-phase particles are individually isolated by a matrix of silicide, carbide, and boride phases. The continuous matrix of brittle silicide, carbide, and boride phases results in a low damage tolerance for the hardfacing layer. On the other hand, incoherent phase boundaries of the constituent phases in the hardfacing layer could lead to easy failure along phase boundaries and formation of intergranular cracks.

关键词： Hot isostatic pressing diffusion bonding Ni–Cr–B–Si alloy Microstructure evolution Cracking

Perfecting and extending the near-infrared imaging window

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Light(Science & Applications) 2021年第10期10卷 1949-1966页

作者： Zhe Feng Tao Tang Tianxiang Wu Xiaoming Yu Yuhuang Zhang Meng Wang Junyan Zheng Yanyun Ying Siyi Chen Jing Zhou Xiaoxiao Fan Dan Zhang Shengliang Li Mingxi Zhang Jun Qian State Key Laboratory of Modern Optical Instrumentations Centre for Optical and Electromagnetic ResearchCollege of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang University310058 HangzhouChina Intelligent Optics&Photonics Research Center Jiaxing Institute of Zhejiang University314000 JiaxingZhejiang ProvinceChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology430070 WuhanChina Key Laboratory of Reproductive Genetics(Ministry of Education) Department of Reproductive EndocrinologyWomen’s HospitalZhejiang University School of Medicine310006 HangzhouChina College of Pharmaceutical Sciences Soochow University215123 SuzhouChina

In vivo fluorescence imaging in the second near-infrared window(NIR-II)has been considered as a promising technique for visualizing ***,the definition of the NIR-II region and the mechanism accounting for the excellent performance still need to be ***,we simulate the photon propagation in the NIR region(to 2340 nm),confirm the positive contribution of moderate light absorption by water in intravital imaging and perfect the NIR-II window as 900–1880 nm,where 1400–1500 and 1700–1880 nm are defined as NIR-IIx and NIR-IIc regions,***,2080–2340 nm is newly proposed as the third near-infrared(NIR-III)window,which is believed to provide the best imaging *** wide-field fluorescence microscopy in the brain is performed around the NIRIIx region,with excellent optical sectioning strength and the largest imaging depth of intravital NIR-II fluorescence microscopy to *** also propose 1400 nm long-pass detection in off-peak NIR-II imaging whose performance exceeds that of NIR-IIb imaging,using bright fluorophores with short emission wavelength.

关键词： perfect Perfect fir