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Single copper sites dispersed on hierarchically porous carbon for improving oxygen reduction reaction towards zinc-air battery

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Nano Research 2021年第4期14卷 998-1003页

作者： Wenjie Wu Yan Liu Dong Liu Wenxing Chen Zhaoyi Song Ximin Wang Yamin Zheng Ning Lu Chunxia Wang Junjie Mao Yadong Li State Key Laboratory of Heavy Oil Processing College of New Energy and MaterialsChina University of PetroleumBeijing 102249China Key Laboratory of Functional Molecular Solids Ministry of EducationAnhui Province Key Laboratory of Optoelectric Materials Science and Technology and Anhui Laboratory of Molecule-Based MaterialsAnhui Normal UniversityWuhu 241002China State key Lab of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Department of Chemistry Tsinghua UniversityBeijing 100084China

The demand for high-performance non-precious-metal electrocatalysts to replace the noble metal-based catalysts for oxygen reduction reaction(ORR)is intensively ***,single-atomic copper sites supported on N-doped three-dimensional hierarchically porous carbon catalyst(Cu_(1)/NC)was prepared by coordination pyrolysis ***,the Cu_(1)/NC-900 catalyst not only exhibits excellent ORR performance with a half-wave potential of 0.894 V(***)in alkaline media,outperforming those of commercial Pt/C(0.851 V)and Cu nanoparticles anchored on N-doped porous carbon(CuNPs/NC-900),but also demonstrates high stability and methanol ***,the Cu_(1)/NC-900 based Zn-air battery exhibits higher power density,rechargeability and cyclic stability than the one based on Pt/*** experimental and theoretical investigations demonstrated that the excellent performance of the as-obtained Cu_(1)/NC-900 could be attributed to the synergistic effect between copper coordinated by three N atoms active sites and the neighbouring carbon defect,resulting in elevated Cu d-band centers of Cu atoms and facilitating intermediate desorption for ORR *** study may lead towards the development of highly efficient non-noble metal catalysts for applications in electrochemical energy conversion.

关键词： single atomic sites catalysts nitrogen-doped carbon materials oxygen reduction reaction carbon defect non-noble metal

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High-flux and anti-salt solar desalination via scalable photothermal textiles with vertically confined water layers

Device

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Device 2025年

作者： Zhang, Qian Wang, Manyu Yu, Hao Xu, Ning Xiao, Xingfang Pan, Luqi Zhu, Jia Xu, Weilin State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile University Wuhan 430200 China National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional Materials Frontiers Science Center for Critical Earth Material Cycling Nanjing University Nanjing China

Interfacial solar evaporation plays a crucial role in desalination because of its sustainable, eco-friendly characteristics. However, major challenges to simultaneously achieving salt rejection, fast evaporation, and heat localization in solar desalination devices still remain. We propose a photothermal textile with vertically confined water layers for scalable, high-flux, long-term-reliable solar desalination. The photothermal textile consists of outer layers (carbon fibers) for solar absorption and core layers (hollow yarns) for water-feeding channels. Three-dimensional evaporators possess large evaporation areas and, thus, high evaporation rates, and the vertically confined water layers in the hollow yarns enable natural convection for effective salt rejection with negligible heat loss. Consequently, this photothermal textile achieves an evaporation rate of 2.05 kg m⁻² h⁻¹ in high-salinity brine (15 wt % NaCl solution) under 1-sun irradiation, with long-term reliability of over 20 days in continuous outdoor operation. © 2025 The Author(s)

关键词： DTI-2: Explore high flux photothermal textile salt rejection solar desalination vertically confined water layer

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Sustainable Strategy for Lignin Etherification and its Promotion of Anti-Uv Aging Pla Biocomposite

SSRN

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SSRN 2024年

作者： Li, Bowen Zhu, Xinyi Xu, Chaoqun Zhang, Xiaofang Fan, Yimin Yu, Juan Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials College of Chemical Engineering Nanjing Forestry University Nanjing210037 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

Lignin functionalization in sustainable ways holds significant importance for its high-value utilization, however, it remains challenging to simultaneously achieve highly efficient modification of both the phenolic (Phe)-OH and aliphatic (Aliph)-OH of *** this study, a series of highly hydroxyl-substituted alkali lignin phenyl propylene ketone ethers (ALKs) were obtained under 50 °C without any by-products via a mild and sustainable hydroxyl-yne click reaction. Notably, phenolic (Phe)-OH content of lignin decreased from 4.12 mmol g-1 to 0.07 mmol g-1 with a conversion rate of 98%, while the aliphatic (Aliph)-OH content of lignin decreased from 2.57 mmol g-1 to 0.10 mmol g-1 with a conversion rate of 96%. Owing to the efficient etherification, ALK showed excellent organic solvent (such as trichloromethane, DCM, THF, and acetone) solubility, which thereby improving the interfacial compatibility between ALK and PLA matrix. 3wt% ALK obviously enhanced the mechanical properties of ALK/PLA biocomposite films, with the yield strength, breaking strength, and Young's modulus improving by 114.2%, 30.7%, and 250.2%, respectively. Additionally, due to the newly introduced vinyl ether bonds (-C-O-C=C-) in ALK by hydroxyl-yne click reaction, only 1% ALK could endow ALK/PLA biocomposite with excellent UV shielding (100%), high transmittance (84.5%) and Anti-UV aging property. The yield strength and Young's modulus represented an increase of 209% and 86%, respectively, even after 3 hours of UV-irradiation. This study presents an environmentally friendly lignin functionalization method that unleashes the inherent Anti-UV aging properties of lignin, opening new avenues for the development of high-performance lignin-based composites. © 2024, The Authors. All rights reserved.

关键词： Lignin

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Tunable broadband near-infrared luminescence of chromium with self-induced valence variation in Sr3In2Ge3O12

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Ceramics International 2025年

作者： Yang, Xiongfeng Fan, Xing He, Fangqian Zhang, Jianjie Tang, Chunhai Su, Liumei 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 School of Materials and Environment Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization Guangxi Colleges and Universities Key Laboratory of Eco-friendly Materials and Ecological Restoration Guangxi Minzu University Nanning530105 China

The demand for high-performance near-infrared (NIR) light-emitting materials has grown in recent years due to their great potential in numbers of technological fields, including non-destructive testing, optical telecommunications, and biological imaging. Herein, we present a novel Cr-activated NIR light-emitting garnet (Sr3In2Ge3O12) material with broadband dual-emission at NIR-I (860 nm, FWHM = 120 nm) and NIR-II (1480 nm, FWHM = 280 nm) regions under blue light excitation. Cr-doping results in the generation of multiple impurity levels within the band structure of Sr3In2Ge3O12, inducing a change in the host from an indirect to a direct band gap n-type semiconductor. Thanks to the multiple-sites occupancy of Cr ions in Sr3In2Ge3O12, the NIR dual-emission is verified to derive from the self-induced valence variation of Cr3+ and the intervalence energy transfer associated with Cr3+-Cr4+ aggregation. The large thermal activation energy and the weak electron-phonon coupling effect contribute to excellent thermal stability of the phosphor, with the emission intensities of Cr3+ and Cr4+ at 423 K maintaining 81.9 % and 86.3 % of that at room temperature. Moreover, the incorporation of Ca2+ into the Sr2+ lattice site enables the realization of tunable NIR emission in Sr3In2Ge3O12:Cr. The Sr3In2Ge3O12:Cr phosphor can be effectively utilized for the non-invasive detection of functional groups in a liquid medium. This work provides new insights into the design of broadband dual-emission light-emitting materials, which can be achieved by selecting an appropriate host to induce a valence variation in transition metal activators. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Phosphors

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Development of Photothermal-Heat Storage Concrete Incorporating Super Absorbent Polymer

SSRN

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SSRN 2023年

作者： Wang, Shizhe Wu, Haiping Yang, Wen Wang, Wei Zhu, Zhibo Nie, Kun Wang, Luoxin Wang, Hua Wu, Jing College of Materials Science and Engineering State Key Laboratory of New Textile Materials & Advanced Processing Technology Wuhan Textile University Wuhan430200 China Building Materials Science Academy of China West Construction Group Co. Ltd. Chengdu610213 China

Solar energy absorbed and stored in building materials can reduce heating/cooling loads and energy consumption in buildings. In this study, photothermal-heat storage concrete (PHSC) was developed by using carbon black as the photothermal material and pre-soaked super absorbent polymer (SAP) as the heat storage medium. The resulting photothermal conversion performance and heat storage performance of PHSC were investigated. The results showed that PHSC exhibit excellent photothermal conversion performance, specific heat capacity and heat storage capacity. The heat stored in the PHSC was 1.48 times higher than control concrete when both were exposed to sunlight during the day. PHSC converts and stores the absorbed sunlight during the day and releases the stored heat at night when the temperature drops. PHSC is a ‘green’, low-carbon and eco-friendly building material, its application in building structures can effectively reduce energy consumption by lowering heating and cooling loads. © 2023, The Authors. All rights reserved.

关键词： Heat storage

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Effect of Base Oil on Rheological Behaviors and Tribological Properties of Nano-silica Greases

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Journal of Bio- and Tribo-Corrosion 2023年第2期9卷 1-13页

作者： Liu, Huanchen Wang, Xiaoyu Zhao, Qilong Li, Xiaohong Wang, Xiaobo Zhang, Shengmao Lou, Wenjing Engineering Research Center of Nanomaterials Henan University Kaifeng475004 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Qingdao Key Laboratory of Lubrication Technology for Advanced Equipment Qingdao Center of Resource Chemistry & New Materials Qingdao266100 China University of Chinese Academy of Sciences Beijing100049 China

Four samples were prepared by the same synthetic process with paraffinic oil, naphthenic oil, poly-α-olefin oil (PAO), and polyol ester oil (POE), respectively, and using nano-silica as the thickener. For the samples prepared into nano-silica greases (NSGs) successfully, their physiochemical properties, rheological behaviors, low-temperature fluidities, and tribological properties were investigated. Based on the materials and preparation methods selected in this experiment, it has been found that the polyol ester oil could not be prepared into NSGs and the paraffinic oil-based grease had the best colloid stability among the three greases successfully prepared. SEM analysis revealed that NSGs synthesized by different base oils had a similar chain skeleton structure. Moreover, the properties of base oils and their sensitivities to nanoparticles (nano-thickeners) determined the structural strength and thixotropy of the as-prepared NSGs. The low-temperature fluidity test also showed that PAO-based grease has the best pumpability. In addition, the tribological properties of greases were different from the corresponding base oils, which might be caused by the change of the structure after the preparation of greases and the participation of nano-silica in the friction process. This study provided guidance in selecting base oils for the development of high-performance NSGs. © 2023, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

关键词： Friction

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Deoxidation behavior of boron in the production of C10200 oxygen-free copper: Effects on microstructure and material properties

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Journal of materials Research and technology 2025年 36卷 9529-9538页

作者： Chu Cheng Yan-Shuo Feng Ming-Yu Li Hai-Tao Liu Meng-Xin Wang Ling-Liang Zhang Tao Huang Xiao-Wen Peng Zhi-He Dou Hui-Wen Guo Ke-Xing Song School of Materials Science and Engineering Henan University of Science and Technology Luoyang 471023 China Henan Key Laboratory of Non-ferrous Materials Science & Processing Technology Henan University of Science and Technology Luoyang 471003 China Provincial and Ministerial Co-construction Collaborative Innovation Center of Nonferrous New Materials and Advanced Processing Technology Luoyang 471023 China Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education Northeastern University Shenyang 110819 China Chinalco Luoyang Copper Processing Co. Ltd Luoyang 471039 China Henan Key Laboratory of Advanced Conductor Materials Institute of Materials Henan Academy of Sciences Zhengzhou 450002 China

Oxygen-free copper is widely used in power electronics, high-power modules, aerospace applications, and other advanced technologies. Currently, oxygen-free copper is primarily produced via phosphorus deoxidation, which negatively impacts the electrical and mechanical properties, as well as the adhesion of the high-temperature oxide layer, thereby limiting the broader application of oxygen-free copper. In order to overcome the negative effects of phosphorus deoxidation in preparation of oxygen-free copper, it is proposed to replace phosphorus deoxidation with boron to eliminate the harm of phosphorus deoxidation in preparation of oxygen-free *** study investigates the production of oxygen-free copper using boron deoxidation for ceramic copper-chad plates, focusing on the deoxidation behavior of boron in copper melts and the influence of residual boron on the microstructure and properties of copper. The results show that boron can reduce the oxygen content in copper from 643 ppm to below 10 ppm. Boron primarily removes oxygen from [Cu 2 O] in the Cu–B–O melt, and the relationship between oxygen and boron concentrations in copper follows the Boltzmann model. As boron content increases in oxygen-free copper after deoxidation, the average grain size and electrical conductivity decrease. The relationship between average grain size and boron content adheres to the Boltzmann model, while the relationship between conductivity and boron content follows a logistic model. Tensile strength and elongation of copper initially increase and then decrease; the fracture mode of copper shifts from dimple fracture to brittle fracture and, ultimately, to a mixed dimple-brittle fracture. When the oxygen content of copper is 10 ppm and the residual boron content is 150 ppm, the comprehensive properties of oxygen-free copper are the best, the tensile strength is 156.7 MPa, the elongation is 41.58 %, and the conductivity is 97.98 IACS%. Boron enhances copper's strength via solid solu

关键词： Mass concentration model Oxygen-free copper Mechanical property Electrical conductivity

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Recent progress in perovskite solar cells:material science

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Science China Chemistry 2023年第1期66卷 10-64页

作者： Jiang-Yang Shao Dongmei Li Jiangjian Shi Chuang Ma Yousheng Wang Xiaomin Liu Xianyuan Jiang Mengmeng Hao Luozheng Zhang Chang Liu Yiting Jiang Zhenhan Wang Yu-Wu Zhong Shengzhong(Frank)Liu Yaohua Mai Yongsheng Liu Yixin Zhao Zhijun Ning Lianzhou Wang Baomin Xu Lei Meng Zuqiang Bian Ziyi Ge Xiaowei Zhan Jingbi You Yongfang Li Qingbo Meng Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Laboratory for Renewable Energy(CAS) Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologyInstitute for Advanced Energy MaterialsSchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Australian Institute for Bioengineering and Nanotechnology and School of Chemical Engineering The University of QueenslandSt LuciaBrisbaneQLD 4072Australia Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Key Laboratory of Polymer Chemistry and Physics of Ministry of Education School of Materials Science and EngineeringPeking UniversityBeijing 100871China Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Dalian National Laboratory for Clean Energy Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Key Laboratory of Funct

Perovskite solar cells represent a promising third-generation photovoltaic technology with low fabrication cost and high power conversion *** light of the rapid development of perovskite materials and devices,a systematic survey on the latest advancements covering a broad range of related work is urgently *** review summarizes the recent major advances in the research of perovskite solar cells from a material science *** discussed topics include the devices based on different type of perovskites(organic-inorganic hybrid,all-inorganic,and lead-free perovskite and perovskite quantum dots),the properties of perovskite defects,different type of charge transport materials(organic,polymeric,and inorganic hole transport materials and inorganic and organic electron transport materials),counter electrodes,and interfacial materials used to improve the efficiency and stability of *** discussions focus on the key progresses reported within the recent five ***,the major issues limiting the production of perovskite solar cells and the prospects for the future development of related materials are discussed.

关键词： perovskite solar cells power conversion efficiency perovskite materials hole transport materials electron transport materials counter electrode materials interfacial functional materials defects

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Unexpected giant negative area compressibility in palladium diselenide

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National Science Review 2023年第9期10卷 146-153页

作者： Xingxing Jiang Shengzi Zhang Dequan Jiang Yonggang Wang Maxim S.Molokeev Naizheng Wang Youquan Liu Xingyu Zhang Zheshuai Lin New Functional Crystals Group Key Laboratory of Functional Crystals and Laser TechnologyTechnical Institute of Physics and ChemistryChinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences University of Chinese Academy of Sciences Center for High Pressure Science &Technology Advanced Research School of Materials Science and Engineering Peking University Laboratory of Crystal Physics Kirensky Institute of PhysicsSB RAS Department of Physics Far Eastern State Transport University International Research Center of Spectroscopy and Quantum Chemistry Siberian Federal University

Negative area compressibility（NAC） is a counterintuitive 'squeeze-expand' behavior in solids that is very rare but attractive due to possible pressure-response applications and coupling with rich physicochemical ***,NAC behavior is reported in palladium diselenide with a large magnitude and wide pressure *** discover that,apart from the rigid flattening of layers that has been generally recognized,the unexpected giant NAC effect in PdSe2largely comes from anomalous elongation of intralayer chemical *** structural variations are driven by intralayer-to-interlayer charge transfer with enhanced interlayer interactions under *** work updates the mechanical understanding of this anomaly and establishes a new guideline to explore novel compression-induced properties.

关键词： negative area compressibility Lifshitz mechanism charge transfer

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Hydrogen storage performance and phase transformations in as-cast and extruded Mg-Ni-Gd-Y-Zn-Cu alloys

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Journal of materials Science & technology 2023年第20期151卷 162-177页

作者： Hu Yao Guang Zeng Xin FTan Qinfen Gu Kazuhiro Nogita Jing Guo Qian Li School of Materials Science and Engineering Central South UniversityChangsha 410083China Nihon Superior Centre for the Manufacture of Electronic Materials(NS CMEM) School of Mechanical and Mining EngineeringThe University of QueenslandBrisbaneQLD 4072Australia Australian Synchrotron ANSTO.800 Blackburn RdClaytonVIC 3168Australia Hunan Baohuifeng New Material Science&Technology Co. Ltd.HuaihuaChangsha 418000China National Engineering Research Center for Magnesium Alloys&College of Materials Science and Engineering Chongqing UniversityChongqing 400044China State Key Laboratory of Advanced Special Steels&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China

Thermal-mechanical processing of magnesium-based materials is an effective method to tailor the hydrogen storage *** this study,Mg-Ni-Gd-Y-Zn-Cu alloys were prepared by Direct Chill(DC)casting,with and without extrusion *** influences of microstructure evolution,introduced by DC casting and thermal-mechanical processing,on the hydrogen storage performance of Mg-Ni-Gd-Y-ZnCu alloys were comprehensively explored,using analytical electron microscopy and in-situ synchrotron powder X-ray *** result shows that the extruded alloy yields higher hydrogen absorption capacity and faster hydrogen ab/desorption *** subjected to extrusion processing,theα-Mg grains in the microstructure were significantly refined and a large number of 14H type long-period stacking ordered(LPSO)phases appeared on theα-Mg *** activation,there were more nanosized Gd hydride/Mg2Ni intermetallics and finer *** modifications synergistically enhance the hydrogen storage *** findings have implications for the alloy design and manufacturing of magnesiumbased hydrogen storage materials with the advantages of rapid mass production and anti-oxidation.

关键词： Magnesium alloy Hydrogen storage performance Nanosized hydride Grain refinement Synchrotron X-ray diffraction Long-period stacking ordered(LPSO)phase

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