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基于机器学习的Fe/Y协同调控抗氨Pt基HOR催化剂用于高效氢气纯化（英文）

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Science China materials 2025年

作者：赵焱申王小青王锐吴芳林段文婧李皓唐浩林 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology National Energy Key Laboratory for New Hydrogen-ammonia Energy Technologies School of Biological and Chemical Engineering Zhejiang University of Science and Technology School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology Catalonia Institute for Energy Research (IREC) Sant Adrià de Besòs Hubei Key Laboratory of Fuel Cell

开发具有更强氨耐受性的高效电催化剂对于氢电化学氢泵的发展至关重要.本研究利用机器学习和夏普利相加解释法确定了两种具有耐氨潜力的过渡金属Fe和Y.随后,通过使用这两种过渡金属对铂的电子结构进行了调节.在此过程中,Fe凭借其优异的...

开发具有更强氨耐受性的高效电催化剂对于氢电化学氢泵的发展至关重要.本研究利用机器学习和夏普利相加解释法确定了两种具有耐氨潜力的过渡金属Fe和Y.随后,通过使用这两种过渡金属对铂的电子结构进行了调节.在此过程中,Fe凭借其优异的催化能力,促进了PtY合金的形成.这种改性显著减少了氨的吸附,增强了抗氨中毒能力,同时提高了氢氧化反应活性.采用双过渡金属调控的电催化剂（FeY-Pt-C,20%Pt）的质量活性为1071 mA mgPt-1,是Pt-C催化剂（20%Pt）的2.23倍.值得注意的是,即使在5000 ppmNH3的影响下,FeY-Pt-C仍能保持其93.1%的初始电催化活性,显示出卓越的抗氨中毒能力.因此,这项研究为HOR催化剂在氢氨分离领域中的应用提供了见解.

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advanced Electromagnetic Shielding and Excellent Thermal Management of Flexible Phase Change Composite Films

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SSRN 2023年

作者： Fang, Heng Zeng, Juanmei Shao, Xinyu Hu, Dongying State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials School of Resources Environment and Materials Guangxi University Nanning530004 China

Endowing the integration of electromagnetic interference (EMI) shielding and thermal management is of great practical significance but remains extremely challenging, especially EMI stability in solid-liquid phase transformation process. Here, innovative flexible composite phase change films (PF/AC/PEG-X (X=2, 4, 6, 8) ) was developed inspired by the unique inter-structure of seedpod composed by scattered honeycomb pores and large multicellular interlocking of lotus seeds and lotus houses. The rich porous structure of eucalyptus-derived carbon not only realizes the high load of PEG (67.4%) and enhanced heat conversion efficiency, but also complete the reflection and absorption of electromagnetic waves (59.83 dB), and develop the steady-state EMI properties during solid-liquid transition under photo-thermal interaction. Optimized PF/AC/PEG-2 film has highlighted a mechanical strength of 45.1 MPa, an energy storage density of 121.3 J/g, a photothermal conversion efficiency of 89.42%, high light/thermal cycle stability (95%), and excellent flexibility. This flexible composite phase change films are promising for a wide range of applications in efficient thermal management and electromagnetic shielding of electronic devices. © 2023, The Authors. All rights reserved.

关键词： Electromagnetic shielding

Beating stripe solitons arising from helicoidal spin-orbit coupling in Bose-Einstein condensates

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Physical Review E 2025年第4期111卷 044203-044203页

作者： Cui-Cui Ding Qin Zhou B. A. Malomed Research Group of Nonlinear Optical Science and Technology Research Center of Nonlinear Science School of Mathematical and Physical Sciences Wuhan Textile University Wuhan 430200 China State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile University Wuhan 430200 China Department of Physical Electronics School of Electrical Engineering Faculty of Engineering and the Center for Light-Matter University Tel Aviv University Tel Aviv Israel Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica Chile

We demonstrate that the model of a spatially nonuniform two-component Bose-Einstein condensates (BEC) featuring the helicoidal spin-orbit coupling (SOC), gives rise to dark-bright soliton complexes characterized by spatiotemporal periodic oscillations in each component. These solitons are formed by the superposition of dark and bright ones, and exhibit a beating state over time and a striped state across space, earning them the designation of beating stripe solitons. Our analysis demonstrates that helicoidal SOC significantly affects the formation and dynamical properties of these solitons, also serving as the primary driver for spin oscillations. Through the nonlinear superposition of the beating stripe solitons, a range of intricate scenarios of the interaction between multiple solitons emerges, including head-on collisions, bound states, and parallel states.

关键词： Solitons

Thermally Responsive Flexible Self-Luminous Binary Fatty Alcohol Eutectic-Based Reversible Thermochromic Passive Energy-Saving Eucalyptus Wood Aerogel Composites

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SSRN 2023年

作者： Tao, Ruiqian Feng, Nianrong Li, Jiahua Li, Bochen Lv, Yugui Li, Kenan Hu, Dongying State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials School of Resources Environment and Materials Guangxi University Nanning530004 China

The development of flexible self-luminous reversible thermochromic passive energy-saving composites (TPCMs) is self-challenge due to the defects of easy leakage, non-visibility, solid phase rigidity and weak light absorption. So, the emerging TPCMs were cleverly constructed using wood aerogel as support skeleton and different mass ratios of natural latex/long afterglow components as flexible and self-luminescent matrix based on optimal binary fatty alcohol eutectic (C14C20). Among them, C14C20R-TEW-1R and C14C20G-TEW-0.35P stand out with suitable phase transition temperatures (28.8 °C and 29.7 °C), high latent heat values (100.5 J g-1 and 119.4 J g-1) and low supercooling (0.7 °C and 0 °C). Induced by phase change, they change from rigid to flexible, from red/green to milky white, and can absorb light to achieve self-luminescence in the dark (orange red and blue-green) and enhanced photothermal efficiency. Beyond the traditional thermal/light stability and excellent anti-leakage performance, TPCMs realizes the combination of temperature sensitivity/control and self-luminous, providing broad application prospects in home automation, passive energy-saving in buildings, luminescent response switches and other fields. © 2023, The Authors. All rights reserved.

关键词： Aerogels

Transformation Phases and Metal Leaching Characteristics of Iron and Aluminum in Red Mud Under the Process of Calcination and Acid Dissolution

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SSRN 2023年

作者： Huang, Yuhua Mo, Wei Feng, Jinpeng Ren, Rulong Guo, Wei Su, Xiujuan Yang, Jinlin He, Chunyan State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials School of Resources Environment and Materials Guangxi University Nanning530004 China

A novel approach is proposed, combining pyrometallurgical and hydrometallurgical processes, to enhance the recovery of Fe and Al while effectively breaking down the mineral composition of red mud. The study delves into the roasting reduction behavior and conversion mechanism of red mud, utilizing thermodynamic analysis and conducting roasting experiments. Extensive investigations were conducted to analyze the impact of roasting temperature and time on the carbothermal reduction of red mud. The results indicate that the most favorable leaching effect of iron and aluminum from red mud was achieved at 1000 °C for 45 min. Furthermore, the behavior of roasted red mud during acid leaching was meticulously explored. During the roasting process, the vast majority of hematite in the red mud underwent reduction to FeO and Fe, while the aluminum-bearing minerals melted and decomposed to form NaAlSiO4 and Ca2Al2SiO7, along with other substances. The formation of low-valent and independently present iron products played a crucial role in achieving high Fe leaching rates. However, the presence of Ca2Al2SiO7 in the roasting product proved difficult to leach with acid and remained encapsulated by the acid-leaching product, leading to poor Al leaching efficiency. The acid leaching process exhibited promising results, with maximum leaching rates of iron and aluminum reaching 95.73% and 72.54%, respectively. This success can be attributed to the control over experimental conditions, which allowed for the generation of desired iron oxides with various valence states. © 2023, The Authors. All rights reserved.

关键词： Aluminum

Cathodic Zn underpotential deposition:an evitable degradation mechanism in aqueous zinc-ion batteries

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Science Bulletin 2022年第18期67卷 1882-1889,M0004页

作者： Shaohua Zhu Yuhang Dai Jinghao Li Chumei Ye Wanhai Zhou Ruohan Yu Xiaobin Liao Jiantao Li Wei Zhang Wei Zong Ruwei Chen Guanjie He Dongliang Chao Qinyou An State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materialsand School of Chemistry and MaterialsFudan UniversityShanghai 200433China Christopher Ingold Laboratory Department of ChemistryUniversity College LondonLondon WC1H 0AJUK Electrochemical Innovation Laboratory Department of Chemical EngineeringUniversity College LondonLondon WC1E 7JEUK State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Department of Materials Science and Metallurgy University of CambridgeCambridge CB30FSUK

Aqueous zinc-ion batteries(AZIBs)are promising for large-scale energy storage,but their development is plagued by inadequate cycle ***,for the first time,we reveal an unusual phenomenon of cathodic underpotential deposition(UPD)of Zn,which is highly irreversible and considered the origin of the inferior cycling stability of *** experimental and theoretical simulation approaches,we propose that the UPD process agrees with a two-dimensional nucleation and growth model,following a thermodynamically feasible ***,the universality of Zn UPD is identified in systems,including VO_(2)//Zn,TiO_(2)//Zn,and SnO_(2)//*** practice,we propose and successfully implement removing cathodic Zn UPD and substantially mitigate the degradation of the battery by controlling the end-ofdischarge *** work provides new insights into AZIBs degradation and brings the cathodic UPD behavior of rechargeable batteries into the limelight.

关键词： Underpotential deposition Zn metal deposition Zinc-ion battery Aqueous battery Degradation mechanism

The Combined Sol-Gel and Ascorbic Acid Reduction Strategy Enabling Ba2Co2Fe12O22 Hexaferrite/Graphene Composite with Enhanced Microwave Absorption Ability

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SSRN 2023年

作者： He, Yu Wang, Ruoqi Wu, Xiaohan Tang, Chuanhao Qian, Jun Zuo, Peiyuan Zhuang, Qixin Liu, Xing Key Laboratory of Special Functional Polymeric Materials and Related Technology Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai200237 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

Graphene featuring low density and high specific surface area, is highly suitable for loading ferrite nanoparticles. However, the current efficient reducing graphene method in fabricating ferrite/graphene composites require high temperatures/pressures, ae well as highly toxic and explosive reducing agents. We herein propose a strategy for synthesizing Ba2Co2Fe12O22 hexaferrite/graphene composite MAMs by mildly reducing graphene oxide using ascorbic acid. This method enables the reduced graphene oxide with comparable C/O ratios and conductivity comparing to that achieved by other reduction methods. The proper mass ratio of graphene oxide to ferrite particles (1:2) and optimized electromagnetic parameters endow the microwave absorbing materials with a minimum reflection loss value of approximately -45.25 dB and an effective bandwidth of around 4.75 GHz. The simulation calculations are further investigated to verify the practical application of this absorber. Accordingly, it is reasonable to conclude this study provides a new synthetic approach on advanced ferrite/graphene composite based MAMs. © 2023, The Authors. All rights reserved.

关键词： Iron compounds

Strenuous exercise-tolerance stretchable dry electrodes for continuous multi-channel electrophysiological monitoring

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npj Flexible Electronics 2022年第1期6卷 745-753页

作者： Ruijie Xie Qingsong Li Lijun Teng Zhengshuai Cao Fei Han Qiong Tian Jing Sun Yang Zhao Mei Yu Dianpeng Qi Peizhi Guo Guanglin Li Fengwei Huo Zhiyuan Liu CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences(CAS)Shenzhen 518055China The Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen361005 FujianChina Key Laboratory of Flexible Electronics(KLOFE) School of Flexible Electronics(Future Technologies)Nanjing Tech University30 South Puzhu RoadNanjing 211816China Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China

Electrophysiological monitoring under strenuous exercise by using stretchable dry electrodes is vital for healthcare monitoring,prosthetic control,human−machine interfaces and other biomedical ***,the existing dry electrodes are not applicable to the strenuous exercise situation that always involves both fast moving and profuse ***,we present a nano-thick porous stretchable dry electrode system with high stretchability and water *** system attaches conformably to the skin and stretches with it under Van der Waals forces even at sweating conditions,allowing the detection of electromyogram when moving with an acceleration of 10 g at a sweating rate of 2.8 mg cm^(−2) min^(−1).It is also capable of acquiring electrocardiogram and electroencephalogram *** strategy proposed would enable the biomedical studies and related applications with the requirement of stably recording electrophysiological signals under strenuous exercise scenarios.

关键词： acceleration recording enable

The Isothermal Section of the Phase Diagram of Gd-Mn-Ga (≤50 At.%Ga) Ternary System at 873k

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SSRN 2023年

作者： He, Wei Wang, Qian Yang, Tonghan Bi, Yifei Yang, Yunxiang Li, Chongjiang Liao, Changzhong State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials School of Resources Environment and Materials Guangxi University Nanning530004 China

关键词： X ray diffraction