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Zeolitic Imidazolate Framework-Derived Copper Single Atom Anchored on Nitrogen-Doped Porous Carbon as Highly Efficient Electrocatalysts for Oxygen Reduction Reaction

SSRN

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SSRN 2022年

作者： Niu, Wen-Jun Sun, Qiao-Qiao He, Jin-Zhong Chen, Jiang-Lei Gu, Bing-Ni Liu, Ming-Jin Chung, Chia-Chen Wu, You-Zhi Chueh, Yu-Lun State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou730050 China School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China Department of Materials Science and Engineering National Tsing Hua University Hsinchu30013 Taiwan Department of Physics National Sun Yat-Sen University Kaohsiung80424 Taiwan Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu30013 Taiwan

Here, copper single atoms anchored on a nitrogen-doped porous carbon (Cu-N/PC) derived from zeolitic imidazolate frameworks (ZIFs) as highly efficient electrocatalysts for ORR were demonstrated. Specifically, as a nitrogen-rich bridge-molecule, tubular g -C 3 N 4 (TCN) can trap free Cu ions through the electrostatic interaction in the initial stage. Then, the Cu ions-doped TCN can be used to regulate the extent of copper and nitrogen doping, the electronic structure, as well as the specific surface area and pore diameter of the Cu-N/PC. As a result, the strong synergistic coupling effects at the atomic interface between Cu atoms and the carbon matrix may significantly enhance the ORR activity by adjusting the reaction free energy of intermediate adsorption, leading to a more positive onset potential ( E 0 = 0.97 V vs. RHE) and half-wave potential ( E 1/2 = 0.88 V) than the commercially available Pt/C catalyst ( E 0 = 0.94, E 1/2 = 0.85 V). Furthermore, the homemade disposable Zn-air battery (ZAB) equipped with Cu-N/PC is able to deliver excellent performance, including a peak power density of 215.8 mW cm −2 and a specific capacity of 704.9 mAh g −1 based on Zn anode, outperforming the Pt/C catalyst. The finding highlights a new guideline for constructing Cu-N/PC catalyst with a well-designed structure and superior property for advanced fuel cells cathode materials. © 2022, The Authors. All rights reserved.

关键词： Doping (additives)

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Bismuth oxide nanoflake@carbon film: A free-standing battery-type electrode for aqueous sodium ion hybrid supercapacitors

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Chinese Chemical Letters 2018年第4期29卷 629-632页

作者： Zhenshuai Zhao Yihua Ye Weihua Zhu Liang Xiao Bohua Deng Jinping Liu School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Aqueous hybrid supercapacitors are promising due to their low cost and high safety. Herein, a freestanding battery-type electrode of Bi2O3 nanoflake@C on carbon cloth is designed for aqueous sodium ion hybrid supercapacitors. Due to the integration of nanoarray architecture and the conductive carbon,the Bi2O3@C electrode exhibits a high specific capacity of 207 mAh/g at 2 A/g（6C）, good rate capability and cycling stability（133 m Ah/g after 1000 cycles）. With the activated carbon as the capacitive electrode and neutral sodium salts as the electrolyte, a 1.9 V hybrid supercapacitor is assembled,delivering a high energy density of 18.94 Wh/kg. The device can still maintain 72.3% of initial capacity after 650 cycles. The present work holds great promise for developing next-generation hybrid supercapacitors.

关键词： Bi2O3 film Free-standing Carbon hybridization Hybrid supercapacitors

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Microstructure, Mechanical Properties, Wear Performance and Magnetic Susceptibility of Ti-35Nb-15Zr (at%) Alloy Fabricated by Laser Powder Bed Fusion

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Metals and materials International 2025年

作者： Zhou, Jun Lv, Pengcheng Xiao, Buwei Wang, Yurong Long, Ting Liang, Xiaoyu Long, Yu Hou, Huidong School of Mechanical Engineering Guangxi University Nanning530004 China State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Department of Mechanical Engineering Tsinghua University Beijing100084 China Key Laboratory for Advanced Materials Processing Technology Ministry of Education Beijing100084 China China North Standardization Center Beijing100081 China

The thermal history during laser powder bed fusion (LPBF) processing is significantly influenced by variations in laser power and scanning speed, which can be optimised to improve the microstructure and mechanical properties of the fabricated components. Herein, we systematically examined the impact of laser power and scanning speed on the mechanical properties, wear performance, and magnetic susceptibility of a Ti35Nb15Zr (at%) alloy. The present findings reveal that increasing both the laser power and scanning speed leads to a more uniform distribution of coarse and fine grains within the alloy, an increase in the yield strength from 1241.46 to 1258.19 MPa, and an increase in the elongation from 6.81 to 7.87%. At a fixed scanning speed, augmenting the laser power results in an increase in the average grain size from 15.92 μm to 19.63 μm and a decrease in the content of unfused Nb from 0.63 to 0.154%, which results in an increase in the elongation of the samples from 6.81 to 8.36%, and an increase in the wear resistance by 28.96%. The presence of lack of fusion in the T3515 alloy leads to a decrease in the ductility, and additionally the elevated heat input strengthens the alignment of the crystallographic texture, which increases the magnetic susceptibility of the alloy. © The Author(s) under exclusive licence to The Korean Institute of Metals and materials 2025.

关键词： Magnetic susceptibility

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Corrigendum to “MnO 2 nanoflakes anchored on carbon nanotubes as self-standing anode for sodium ion batteries” [J. Energy Storage 92 (2024) 112291]

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Journal of Energy Storage 2024年 94卷

作者： Renpeng Lin Mingjun Xiao Yishan Xu Lei Zeng Fuliang Zhu Yue Zhang Yanshuang Meng School of Materials Science and Engineering Lanzhou University of Technology Lanzhou 730050 China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou 730050 China Department of Manufacturing Engineering Georgia Southern University Statesboro GA 30458 United States

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Light-Driven High-Performance Metal-Air Battery Under Extreme Low Pressure

SSRN

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SSRN 2025年

作者： Guo, Chang Han, Xiao Liu, Han Gao, Yong Wang, Pan Qiu, Xueyuan Zhou, Runtong Pei, Yu Lan, Meng Zong, Meng Wang, Jincheng Xia, Zhenhai Hao, Jianhua Wang, Xing Xie, keyu State Key Laboratory of Solidification Processing School of Materials Science and Engineering Northwestern Polytechnical University Xi’an710072 China Chongqing Innovation Center Northwestern Polytechnical University Chongqing China Queen Mary University of London Engineering School Northwestern Polytechnical University Xi’an710072 China Institute of Science and Technology for New Energy Xi’an Technological University Xi’an710072 China The MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions Ministry of Education School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi’an710072 China Australian Carbon Materials Centre School of Chemical Engineering The University of New South Wales Sydney Australia Department of Applied Physics The Hong Kong Polytechnic University Hong Kong

Metal-air batteries are considered an efficient energy storage technology due to their high energy density, environmental friendliness, and potential for long-term cycle lifetime. However, current research on metal-air batteries is limited to ambient pressure with only several studies focusing on extreme environments specifically low-temperature scenarios. Considering the critical role of pressure on gas-involved reactions and potential applications of low-pressure metal-air batteries, herein, we studied the pressure-dependent catalytic process theoretically based on thermodynamics and found that light-generated carriers can compensate for the low-pressure-induced unfavorable reaction barrier via absorption strength regulation. Following the theoretical guidance, we propose a light and catalysis co-compensation (LCC) strategy for low-pressure Li-CO2 batteries. As a demonstration, we designed and constructed the p-TiO2/Pd@Graphene heterojunction serving as the bifunctional photocathode, where p-TiO2 provides photo-generated carriers and Pd@Graphene accelerates the reaction catalytically thus to facilitate the charging/discharging process jointly under low-pressure. Consistent with the theoretical prediction of pressure sensitivity and photoelectrocatalysis, the resulting light-assisted low-pressure Li-CO2 batteries exhibit surprising performance that far exceeds that at low pressure and even higher than that operating at atmospheric pressure. Furthermore, multiple metal-air batteries, including Li, Na, Mg, and Al-based systems, have proven the feasibility and reliability of the photocatalysis compensated low-pressure reaction theory. This work provides a new pathway for developing high-energy batteries at extremely low pressures and extensively expands the pressure-dependent application fields of catalysis and energy storage devices. © 2025, The Authors. All rights reserved.

关键词： Temperature

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Corrigendum to “Tribological behaviors of in-situ textured DLC films under dry and lubricated conditions” [Appl. Surf. Sci. 525 (2020) 146581]

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Applied Surface Science 2023年 638卷

作者： Dongqing He Chao He Wensheng Li Lunling Shang Liping Wang Guangan Zhang State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou 730050 China School of Materials Science and Engineering Lanzhou University of Technology Lanzhou 730050 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective Technologies Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China

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Ghost Aperture synthesis Imaging with Computational Aberration Cancellation

arXiv

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arXiv 2022年

作者： Sun, Shuai Nie, Zhen-Wu Li, Yue-Gang Lin, Hui-Zu Liu, Wei-Tao Chen, Ping-Xing Institute for Quantum Science and Technology College of Science National University of Defense Technology Hunan Changsha410073 China Interdisciplinary Center of Quantum Information College of Science National University of Defense Technology Hunan Changsha410073 China Hunan Key Laboratory of Mechanism and Technology of Quantum Information Hunan Changsha410073 China State Key Laboratory of Advanced Optical Communication Systems and Networks Institute for Quantum Sensing and Information Processing School of Sensing Science and Engineering Shanghai Jiao Tong University Shanghai200240 China

Although optical aperture synthesis has been generally regarded as the only access to very large imager for over a century, the problem of phasing all the giant sub-apertures on the scale of wavelength is still prohibitive. Besides, the accompanied adaptive optics combatting the atmospheric turbulence is also bulky and complicated. We here propose a new paradigm aperture synthesis imager through turbulence, based on computational ghost imaging method. The complex aberrations on the signal path are computationally cancelled by introducing an optimum compensation phase on the reference path. With the advanced aberration cancellation, our imager is free from phasing and aberrations problem. The image degradation due to turbulence is also suppressed and even eliminated without any guide star or wavefront shaping device. Experimentally, diffraction-limited imaging is achieved under turbulence featuring transverse coherence length far less than the optical aperture of the system. Copyright © 2022, The Authors. All rights reserved.

关键词： Atmospheric turbulence

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Tailored Mechanical Response and Mass Transport Characteristic of Selective Laser Melted Porous Metallic Biomaterials for Bone Scaffolds

SSRN

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SSRN 2020年

作者： Zhang, Lei Song, Bo Yang, Lei Shi, Yusheng State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan430074 China

Porous metallic biomaterials developed from pentamode metamaterials (PMs) were rationally designed to mimic the topological, mechanical, and mass transport properties of human bones. Here, A series of diamond-based PMs with different strut parameters were fabricated from a Ti-6Al-4V powder by selective laser melting (SLM) technique. The morphological features, mechanical properties and permeability of PM samples were then characterized. In terms of morphology, the as-built PMs were well consistent with the as-designed ones, although the slight surface deviations were presented in overhanging areas. The PM scaffolds showed a switchable deformation pattern controlled by the slenderness ratio of struts and volume fractions. The double-cone topology strut also increases the tortuosity and thereby accelerates the nutrients supply, waste removal, and cell migration to the whole scaffold region and circumambient bone tissue. The measured mechanical properties (i.e., E: 0.59-2.90 GPa, σy: 20.59-112.63 MPa) and computational permeability values (k: 9.87-49.19 x10-9 m2) of PM scaffolds are all in accordance with those of trabecular bone. The experimental permeability values were linearly dependent on the results of simulations. This study clearly shows the great potential of PMs as bone scaffolds. Moreover, we demonstrated that PM-based porous biomaterials can decouple the mass transport and mechanical properties of bone scaffolds, so as to achieve an unprecedented level of tailoring their multi-physics properties. © 2020, The Authors. All rights reserved.

关键词： Topology

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Pressure swing adsorption process modeling using physics-informed machine learning with transfer learning and labeled data

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Green Chemical Engineering 2025年第2期 233-248页

作者： Zhiqiang Wu Yunquan Chen Bingjian Zhang Jingzheng Ren Qinglin Chen Huan Wang Chang He School of Materials Science and Engineering Sun Yat-Sen University Guangdong Engineering Center for Petrochemical Energy Conservation Department of Industrial and Systems Engineering The Hong Kong Polytechnic University School of Chemical Engineering and Technology Sun Yat-sen University State Key Laboratory of Heavy Oil Processing China University of Petroleum-Beijing CNNC No.7 Research and Design Institute Co.Ltd.

Pressure swing adsorption(PSA) modeling remains a challenging task since it exhibits strong dynamic and cyclic behavior. This study presents a systematic physics-informed machine learning method that integrates transfer learning and labeled data to construct a spatiotemporal model of the PSA process. To approximate the latent solutions of partial differential equations(PDEs) in the specific steps of pressurization, adsorption, heavy reflux,counter-current depressurization, and light reflux, the system's network representation is decomposed into five lightweight sub-networks. On this basis, we propose a parameter-based transfer learning(TL) combined with domain decomposition to address the long-term integration of periodic PDEs and expedite the network training process. Moreover, to tackle challenges related to sharp adsorption fronts, our method allows for the inclusion of a specified amount of labeled data at the boundaries and/or within the system in the loss function. The results show that the proposed method closely matches the outcomes achieved through the conventional numerical method,effectively simulating all steps and cyclic behavior within the PSA processes.

关键词：

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Application of semi-endless rolling technology in CSP production line 6

Application of semi-endless rolling technology in CSP produc...

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2020 6th International Conference on materials, Mechanical Engineering and Automation technology, MMEAT 2020

作者： Zhou, Feng Chen, Xuewen Gao, Jixiang Li, Liejun Zhou, Qing Foshan Polytechnic Foshan Guangdong528137 China Guangzhou Engineering Polytechnic Guangzhou510520 China Guangdong Polytechnic Normal University Guangzhou510640 China Guangdong Key Laboratory for Advanced Metallic Materials Processing South China University of Technology Guangzhou510640 China

The technical problems and relating reasons of semi-endless rolling were introduced in this paper. Regarding the problems, we carried out a series of improvement towards these problems. The application of semi-endless... 详细信息

关键词： Condensed matter physics

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