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SSRN 2023年

作者： Zhao, Yunrong Ma, Aijing Zhao, Gangguo Wang, Jianshen Hu, Shaopu Liu, Dan Kuvarega, Alex T. Mamba, Bhekie B. Gui, Jianzhou State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process Engineering School of Chemical Engineering and Technology Tiangong University Tianjin300387 China School of Chemistry Tiangong University Tianjin300387 China School of Material Science and Technology Tiangong University Tianjin300387 China Institute for Nanotechnology and Water Sustainability College of Science Engineering and Technology University of South Africa Florida Johannesburg1709 South Africa

Catalytic combustion is regarded as an efficient strategy for eliminating the soot particulates emitted from the diesel engines. Whereas, the insufficient contact between catalyst and soot particulates, as well as the inferior intrinsic activity of catalysts severely restrict the further development and deployment of this technique. In this study, an acanthosphere-like CeO2 catalyst (asl-CeO2) endowed with porous spikes was rationally designed and prepared, which displays outstanding catalytic performance for the soot combustion with the temperature of soot conversion at 10% (T10) and 50% (T50) as low as 324°C and 381°C under the loose contact mode. In addition, the soot combustion performance on the asl-CeO2 was further enhanced when the tight contact mode was deployed or the NO addition introduced. The mechanisem for the superior performance over asl-CeO2 than commercial CeO2 sample (com-CeO2), composed by stacked nanoparticles, were unveiled based on various characterizations, where the acanthosphere-like morphology and porous spikes not only enhanced the contact efficiency between the soot particulates and catalytic sites but also benefited to the mass transfer of gaseous molecules during the reaction. Moreover, the XPS and Raman results revealed that the abundant oxygen vacancies were involved in the asl-CeO2. Furthermore, the H2-TPR and Soot-TPR experiments confirmed the stronger redox capacity of asl-CeO2. Consequently, the combination of these merits endowed the asl-CeO2 a superior catalytic activity toward soot combustion. © 2023, The Authors. All rights reserved.

关键词： Cerium oxide

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Investigation of the Deformation Behavior of Titanium-Particle-Reinforced Magnesium Matrix Composites Through in Situ Synchrotron Radiation Diffraction

SSRN

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SSRN 2024年

作者： Wu, Yi Zhou, Bijin Liu, Jiayuan Zhu, Tianci Wang, Jinhui Zhu, Gaoming Wang, Jie School of Mechanical Engineering Suzhou University of Science and Technology Suzhou215009 China School of Mechanical Engineering Qinghai University Xining810016 China Institute of Material and Process Design Helmholtz-Zentrum Hereon Geesthacht21502 Germany National Engineering Research Center of Light Alloy Net Forming Shanghai Jiao Tong University Shanghai200240 China Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming China

Despite the exceptional mechanical properties of metal matrix composites (MMCs) with metallic reinforcements, the specifics of their deformation behavior remain inadequately understood. This study aims to provide new insights into the twin and dislocation activities in a Tip/Mg–5Al composite during tensile deformation through lattice strain analysis from in situ synchrotron radiation diffraction. The composite exhibited a tensile elongation of 16%, a macro-yield strength of 115 MPa, and an ultimate tensile strength of 252 MPa. It is found that the activities of the geometrically necessary dislocations (GNDs) and the {10[[EQUATION]]2} tension twins within the α-Mg matrix contribute to distinct forms of micro-yielding of the composite. Additionally, the nucleation of {10[[EQUATION]]2} extension twins occurring within Ti particles plays a crucial role in facilitating deformation compatibility between the α-Mg matrix and its reinforcements. The estimated critical resolved shear stress (CRSS) for basal and prismatic slip systems of the α-Mg matrix is approximately 2.2. This study further discussed the significant influence of load transfer effects on activating non-basal dislocations. © 2024, The Authors. All rights reserved.

关键词： Tensile strength

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Dual-Functional Ionic Liquids Additive Enables Dendrite-Free Zn Anode with Ultra-Long Cycle Life Over One Year

SSRN

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SSRN 2024年

作者： Song, Yue-Xian Wang, Jiao Zhong, Xiao-Bin Zhang, Yao-Hui Wang, Kai Guo, Xu-Huan Guo, Hui-Juan Liu, Han-Tao Wang, Gong-Kai Ji, Pu-Guang Zhang, Xin Khalilov, Umedjon Liang, Jun-Fei Wen, Rui School of Energy and Power Engineering North University of China Shanxi Taiyuan030051 China Beijing100190 China Key Laboratory of Green Chemical Process of Ministry of Education Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Wuhan430073 China Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Material Science and Engineering Hebei University of Technology Tianjin300130 China Institute of Ion-Plasma and Laser Technologies Uzbekistan Academy of Sciences Tashkent Uzbekistan

Zn anodes suffer from the formation of uncontrolled dendrites aggravated by the uneven electric field and the insulating by-product accumulation in aqueous zinc-ion batteries (AZIBs). Here, an effective strategy implemented by 1-butyl-3-methylimidazolium hydrogen sulfate (BMIHSO4) additive is proposed to synergistically tune the crystallographic orientation of zinc deposition and suppress the formation of zinc hydroxide sulfate for enhancing the reversibility on Zn anode surface. As a competing cation, BMI+ is proved to preferably adsorb on Zn-electrode compared with H2O molecules, which shields the "tip effect" and inhibits the Zn-deposition agglomerations to inducing the horizontal growth along Zn (002) crystallographic texture. Simultaneously, the protonated BMIHSO4 additives could remove the detrimental OH- in real-time to fundamentally eliminate the accumulation of 6Zn(OH)2·ZnSO4·4H2O and Zn4SO4(OH)6·H2O on Zn anode surface. Consequently, Zn anode exhibits an ultra-long cycling stability of one year (8762 h) at 0.2 mA cm-2/0.2 mAh cm-2, 3600 h at 2 mA cm-2/2 mAh cm-2 with a high plating cumulative capacity of 3.6 Ah cm-2, and a high average Coulombic efficiency of 99.6% throughout 1000 cycles. This work of regulating Zn deposition texture combined with eliminating notorious by-products could offer a desirable way for stabilizing the Zn-anode/electrolyte interface in AZIBs. © 2024, The Authors. All rights reserved.

关键词： Anodes

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Biologically Templated Formation of Cobalt-Phosphide-Graphene Hybrid with Charge Redistribution for Efficient Hydrogen Evolution

SSRN

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SSRN 2024年

作者： Zhou, Xingchen Gong, Lanqian Wu, Chunxia Peng, Yujie Cao, Bingying Jiang, Xueliang Yang, Huan Wu, Daoxiong Xia, Bao Yu Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of Education Wuhan Institute of Technology No. 206 Guanggu 1st Road Wuhan430205 China Key Laboratory of Material Chemistry for Energy Conversion and Storage School of Chemistry and Chemical Engineering Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology 1037 Luoyu Road Wuhan430074 China School of Marine Science and Engineering Hainan Provincial Key Lab of Fine Chemistry School of Chemical Engineering and Technology Hainan University Haikou570228 China

Developing highly efficient and sustainable hydrogen evolution reaction (HER) electrocatalysts is important for practical application of emerging energy technologies. A rich composition, adsorption, and template of microbial properties can be helpful for constructing comparable transition metal phosphide electrocatalysts. Here, a microorganism template strategy is proposed to construct a cobalt-phosphide-graphene hybrid. This designed catalyst has comparable HER performance in acidic electrolytes, achieving an overpotential of only 153 mV at a current density of 10 mA cm-2. Experimental and density functional theory results imply that the charge redistribution between Co2P and pyrrole-N is the key factor in enhancing the HER activity. This is ascribed to the active sites being composed of Co2P- and pyrrole-N-doped carbon with 0 eV hydrogen adsorption free energy. This work provides a broad idea for synthesizing advanced transition metal phosphide catalysts by a biological template approach, facilitating the innovative integration of biology and emerging electrochemical energy technologies. © 2024, The Authors. All rights reserved.

关键词： Electrocatalysts

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Kinetics of carbonated decomposition of hydrogarnet with different silica saturation coefficients

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International Journal of Minerals,Metallurgy and materials 2020年第4期27卷 472-482页

作者： Xiao-feng Zhu Ting-an Zhang Guo-zhi Lü State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Material Science and Engineering Lanzhou University of TechnologyLanzhou 730050China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education Northeastern UniversityShenyang 110819China Special Metallurgy and Process Engineering Institute School of MetallurgyNortheastern UniversityShenyang 110819China

Carbonated decomposition of hydrogarnet is one of the vital reactions of the calcification–carbonation method,which is designed to dispose of low-grade bauxite and Bayer red mud and is a novel eco-friendly *** this study,the effect of the silica saturation coefficient(x)on the carbonation of hydrogarnet was investigated from the kinetic *** results indicated that the carbonation of hydrogarnets with different x values(x=0.27,0.36,0.70,and 0.73)underwent two stages with significantly different rates,and the kinetic mechanisms of the two stages can be described by the kinetic functions R3 and *** apparent activation energies at Stages 1 and 2 were 41.96–81.64 and 14.80–34.84 kJ/mol,***,the corresponding limiting steps of the two stages were interfacial chemical reaction and diffusion.

关键词： Bayer red mud hydrogarnet calcification carbonation kinetics silica saturation coefficient

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Effect of Al2O3 doping on the structure and performance of an Al2O3/Fe2O3 catalyst for mercury oxidation

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Journal of Environmental Sciences 2020年第4期32卷 138-145页

作者： Ruihui Liu Tingyu Zhu Li Tong Wenqing Xu School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China Research Center for Process Pollution Control National Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004China Department of Air Pollution Control Beijing Municipal Institute of Labor ProtectionBeijing 100054China

In this study,the thermal stability of a Fe2 O3 catalyst for mercury oxidation was significantly improved by doping with Al2 *** 1 hr,the catalyst doped with 10 wt.%Al2 O3 still exhibited a mercury conversion efficiency of 70.9%,while the undoped sample even lost its catalytic *** with Al2 O3 retarded the collapse of the catalyst mesoporous structure during high-temperature calcination,and the doped samples maintained a higher specific surface area,smaller pore size,and narrower pore size *** electron microscope images revealed that after calcination at 350℃,the average size of the catalyst grains in Fe2 O3 was 23.4 nm;however,the corresponding values for 1%Al2 O3/Fe2 O3,3%Al2 O3/Fe2 O3,and 10%Al2 O3/Fe2 O3 were only 13.3,7.1,and 4.7 nm,*** obtained from X-ray diffraction and thermogravimetry coupled with differential scanning calorimetry confirmed that doping with Al2 O3 also retards the crystallization of the catalysts at high temperature,constraining catalyst grains to a smaller size.

关键词： Mercury Catalytic oxidation Fe2O3 Al2O3 Thermal stability

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The role of dopants in mitigating the chemo-mechanical degradation of Ni-rich cathode: A critical review

EcoEnergy

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EcoEnergy 2025年

作者： Imesha Rambukwella Hanisha Ponnuru Cheng Yan School of Mechanical Medical and Process Engineering Queensland University of Technology Brisbane Queensland Australia Centre for Material Science Queensland University of Technology Brisbane Queensland Australia

Ni-rich cathodes are more promising candidates to the increasing demand for high capacity and the ability to operate at high voltages. However, the high Ni content creates a trade-off between energy density and cycling stability, mainly caused by the chemo-mechanical degradation. Oxygen evolution, cation mixing, rock salt formation, phase transition, and crack formation contribute to the degradation process. To overcome this problem, strategies such as doping, surface coating, and core-shell structures have been employed. The advantage of doping is to engineer the cathode surface, structure, and particle morphology simultaneously. This review aims to summarize recent advances in understanding chemo-mechanical degradation mechanism and the role of different dopants in enhancing the thermal stability and overall electrochemical performance. The pinning and pillaring effects of dopants on suppressing oxygen evolution, cation mixing, and phase transition are introduced. It is found that the higher ionic radii enable dopants to reside on cathode particles, preserving the particle surface and refining particle morphology to suppress crack formation. Finally, the effect of doping on Li ion diffusion, rate capability, and long-term stability are discussed.

关键词： chemo-mechanical degradation doping electrochemical lithium-ion batteries mitigation Ni-rich cathode polycrystalline

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Effect of nitrogen pressure on the fabrication of AlCrFeCoNiCu0.5 high entropy nitride thin films via cathodic arc deposition

Effect of nitrogen pressure on the fabrication of AlCrFeCoNi...

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作者： Jiang, Tenghao Zhao, Hong Tsoutas, Kostadinos Sun, Lixian Liu, Hongwei Liu, Yanping Xu, Fanjun Zheng, Zhong Bilek, Marcela M. Liu, Zongwen School of Chemical and Biomolecular Engineering The University of Sydney SydneyNSW2006 Australia School of Physics The University of Sydney SydneyNSW2006 Australia School of Biomedical Engineering The University of Sydney SydneyNSW2006 Australia Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials School of Material Science & Engineering Guilin University of Electronic Technology Guilin541004 China The University of Sydney SydneyNSW2006 Australia Hunan Key Laboratory for Super-microstructure and Ultrafast Process School of Physics and Electronics Central South University Hunan410083 China The University of Sydney Nano Institute The University of Sydney SydneyNSW2006 Australia

In the past two decades, high entropy alloy (HEA) coatings have attracted great attention due to their superior mechanical properties, outstanding corrosion and oxidation resistance, and exceptionally high thermal stability. In comparison to HEA thin films, high entropy nitrides (HENs) exhibit higher mechanical strength and chemical inertness. In this work, AlCrFeCoNiCu0.5 HEA and HEN thin films were fabricated using a filtered cathodic arc. By regulating the deposition pressure from 0.0005 Pa (HEA thin film) to 0.05 Pa, the nitrogen concentration in each thin film was precisely controlled to tune the mechanical properties. Scanning transmission electron microscopy-energy dispersive spectroscopy revealed that the nitrogen concentration of the films was up to 21.2 at. % at the pressure of 0.05 Pa. The reduced effect of preferential sputtering increased aluminum concentration from 8.3 ± 1.5 to 12.9 ± 2.2 at. % as pressure increased up to 0.05 Pa. X-ray photoelectron spectroscopy further confirmed the formation of AlN and CrN at pressures of 0.01-0.05 Pa. The highest hardness and elastic modulus of the HEN film were 12.4 ± 0.6 and 347.3 ± 17.7 GPa, respectively, which were 84.8% and 131.4% higher than those of the HEA thin film. © 2023 Author(s).

关键词： Entropy

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Advances in vat photopolymerization: early-career researchers shine light on a path forward

RSC Applied Polymers

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RSC Applied Polymers 2025年第3期3卷 574-591页

作者： Dhand, Abhishek P. Bean, Ren H. Chiaradia, Viviane Commisso, Alex J. Dranseike, Dalia Fowler, Hayden E. Fraser, Julia M. Howard, Holden Kaneko, Takashi Kim, Ji-Won Kronenfeld, Jason M. Mason, Keldy S. Pashley-Johnson, Fred Porcincula, Dominique H. Segal, Maddison I. Yu, Siwei Saccone, Max A. Department of Bioengineering University of Pennsylvania Philadelphia PA United States Sandia National Laboratories Albuquerque NM United States Department of Chemistry RCSI University of Medicine and Health Sciences Dublin Ireland Macromolecular Engineering Laboratory Department of Mechanical and Process Engineering ETH Zurich Zurich Switzerland Department of Chemistry University of Wisconsin-Madison Madison WI United States Materials Engineering Division Lawrence Livermore National Laboratory United States Department of Chemistry and Biochemistry University of California Santa Barbara CA United States Department of Chemical Engineering Kyungpook National University Daegu South Korea Department of Chemistry Stanford University Stanford CA United States Department of Chemistry The University of Texas at Austin Austin TX United States School of Chemistry and Physics Centre for Materials Science Queensland University of Technology (QUT) Brisbane QLD Australia Centre of Macromolecular Chemistry (CMaC) Department of Organic and Macromolecular Chemistry Faculty of Sciences Ghent University Ghent Belgium Thomas Lord Department of Mechanical Engineering & Material Science Duke University Durham NC United States Department of Chemistry University of Washington Seattle WA United States Department of Chemical Engineering Stanford University Stanford CA United States Paul M. Rady Department of Mechanical Engineering University of Colorado Boulder Boulder CO United States

Vat photopolymerization (VP) has emerged as a promising additive manufacturing technique to allow rapid light-based fabrication of 3D objects from a liquid resin. Research in the field of vat photopolymerization spans across multiple disciplines from engineering and materials science to applied chemistry and physics. This perspective brings together early-career researchers from various disciplines in academia and national laboratories around the world to summarize the most recent advancements with special emphasis on the research highlighted as part of the Gordon Research Conference (GRC) 2024 meeting on Additive Manufacturing of Soft materials. We provide an outlook on next-generation polymer processing methods from synthesis of novel materials to multimodality manufacturing and performance engineering. Further, this article combines the ideas of many of these junior researchers to present a vision for the future of the field by highlighting the challenges and opportunities that lie ahead. © 2025 RSC.

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Structural and Diffusional Characteristics Study of Il-Pdms Membranes for Alcohol Purification: Md Simulation Approach

SSRN

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SSRN 2023年

作者： Ahmad, Ali Akram, Naeem Arshad, Faiza Tufail, Muhammad Khurram Qaisrani, Naeem Akhtar Kanwal, Maida Hassan, Afaq Babar, Muhammad Ullah, Sami School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing102488 China School of Chemical Engineering Minhaj University Lahore54000 Pakistan Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and Engineering Beijing Institute of Technology Beijing102488 China College of Material Science and Engineering Qingdao University Qingdao266071 China Department of Chemical Engineering Khwaja Fareed University of Engineering and Information Technology Rahim Yar Khan64200 Pakistan Sustainable Development Study Center Government College University Lahore54000 Pakistan Department of Process Engineering and Chemical Technology Gdansk University of Technology Gdansk80226 Poland Department of Chemistry College of Science King Khalid University Abha61413 Saudi Arabia

This research uses Molecular Dynamics (MD) simulations to explore the structural properties and feed transportation behaviors of Ionic Liquid-Polydimethylsiloxane (IL-PDMS) membranes in the pervaporation process. The effects of concentration, temperature, and surface area on IL-PDMS membranes and the Fractional Free Volume (FFV) and Mean-Squared Displacement (MSD) are examined. Additionally, the glass transition temperatures (Tg's) are explored through the construction of a specialized IL-PDMS unit cell. The simulated Tg value of a pure PDMS is 150 K, which aligns with previous studies, validating the method's accuracy and highlighting its potential application for investigating the glass transition of various polymers. By analyzing feed movement, including ethanol/water trajectories, MSD, and diffusivity at different temperatures, the diffusion mechanism within the IL-PDMS membrane matrix is elucidated. An increment in the operational temperature enhances the chain mobility of the polymer and enlarges the membrane's free volume. Notably, water molecules exhibit higher mobility due to their smaller size and less attraction to PDMS, resulting in a small transfer hindrance compared to ethanol. Consequently, ethanol demonstrates a greater preference for concentrating within the IL-PDMS membrane from ethanol/water mixtures. The findings demonstrate the efficacy of MD simulations in analyzing the performance of IL-PDMS membranes during pervaporation separation. This approach offers valuable insights into membrane behavior and holds promise for advancing membrane-based processes. © 2023, The Authors. All rights reserved.

关键词： Molecular dynamics

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