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Improving the electrochemical performance of Prussian-Blue-analogue cathode by the co-doping of cobalt and nickel and its application in aqueous hybrid ions battery

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Electrochimica Acta 2025年 528卷

作者： Lin, Dian Hua, Ruiqing Yang, Hongwei Xu, Caiyun Yang, Sheng Chen, Jiajun Qu, Deyu Li, Xi Liu, Dan Department of Chemistry School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology 122 Luoshi Road Hubei Wuhan430070 China State Key Laboratory of Advanced Technology for Material Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology 122 Luoshi Road Hubei Wuhan430070 China

Prussian blue and its analogues are promising electrode materials for the potassium ion batteries due to their large interstitial sites and three-dimensional porous framework. In this work, a series of Ni-co-doped Prussian blue analogues, Ni-Co hexacyanoferrate (NixCoyHCF), with various Ni/Co ratios are synthesized. Through the electrochemical investigation, the Prussian blue analogue with optimized ratio of Co and Ni coordinated with the CN, the NixCoyHCF materials exhibit enhanced performance as compared with that of the corresponding undoped counterparts. Specifically, the Ni1Co1HCF material delivers a high initial capacity of 101.6 mAh g-1 with a capacity retention of close to 100 % after 250 cycles, which reflects excellent cycle stability. Moreover, the Ni1Co1HCF material has excellent rate capability compared to NiHCF material. The capacity of the Ni1Co1HCF material under high current 2000 mA g-1 is >86.5 % of that under 50 mA g-1. After pairing with zeolite template carbon (ZTC) anode, the full cell provides an operational voltage of 1.60 V, a capacity of 54 mAh g-1 at 100 mA g-1, and 75.7 % capacity retention at 2000 mA g-1 along with the low self-discharge rate. © 2025

关键词： Semiconductor doping

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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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Microstructure and texture evolution of Cu-0.8Fe-0.2Cr alloy during thermal deformation

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Journal of Alloys and Compounds 2025年 1025卷

作者： He, Wenhao Jing, Ke Zhou, Meng Zhang, Yi Tian, Baohong Chu, Chunhe Hu, Haoyan Han, Zhiyu Li, Xiaobo Sun, Yonghui School of Materials Science and Engineering Henan University of Science and Technology Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metals New Materials and Advanced Processing Technology Luoyang471023 China Henan Province Key Laboratory of Nonferrous Materials Science and Processing Technology Luoyang471023 China Chinalco Luoyang Copper Processing Co. Ltd. Luoyang471000 China

Thermal compression experiments were conducted on Cu-0.8Fe-0.2Cr alloys within a temperature range of 600–950 °C and at strain rates varying from 0.003 to 10 s−1 to establish their constitutive equations. The results show that the thermal deformation activation energy of Cu-0.8Fe-0.2Cr alloy is 341.7 kJ/mol, 12.5 % higher than that of pure copper. The optimum thermal processing parameters were identified in the range of 782–950 °C and strain rates of 0.015–0.333 s−1. Under this condition, finer grain microstructure and better overall properties can be obtained. OM and EBSD analyses showed that lowering the strain rate or increasing the thermal deformation temperature promoted dynamic recrystallization (DRX). In addition, changes in thermal deformation conditions affect the type, strength, and distribution of textures. The percentage of twinned region increases significantly with increasing thermal deformation temperature. TEM analysis at 800 °C and a strain rate of 0.01 s−1 revealed α-Fe and Cr phases as the main precipitates, along with Cu-phase twinning along the [1̅1̅0] crystallographic zone axis. These findings provide deeper insights into the mechanisms driving property changes in Cu-0.8Fe-0.2Cr alloys with low Fe content under varying thermal processing conditions. © 2025

关键词： Constitutive equations

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Polyoxometalated metal-organic framework superstructure for stable water oxidation

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Science (New York, N.Y.) 2025年第6745期388卷 430-436页

作者： Yue, Kaihang Lu, Ruihu Gao, Mingbin Song, Fei Dai, Yao Xia, Chenfeng Mei, Bingbao Dong, Hongliang Qi, Ruijuan Zhang, Daliang Zhang, Jiangwei Wang, Ziyun Huang, Fuqiang Xia, Bao Yu Yan, Ya State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China School of Chemistry and Chemical Engineering State Key Laboratory of Materials Processing and Die & Mould Technology Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service Failure Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology (HUST) Wuhan China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing China School of Chemical Sciences University of Auckland Auckland New Zealand National Engineering Laboratory for Methanol to Olefins Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai Synchrotron Radiation Facility Shanghai China Center for High Pressure Science and Technology Advanced Research Shanghai China Key Laboratory of Polar Materials and Devices (MOE) Department of Electronics East China Normal University Shanghai China Multiscale Porous Materials Center Institute of Advanced Interdisciplinary Studies and School of Chemistry and Chemical Engineering Chongqing University Chongqing China College of Energy Material and Chemistry Inner Mongolia Key Laboratory of Low Carbon Catalysis Inner Mongolia University Hohhot China State Key Lab of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai China Center for Next-Generation Energy Materials and School of Chemical Engineering Sungkyunkwan University (SKKU) Seobu-ro Jangan-guGyeonggi-do Suwon South Korea

Stable, nonprecious catalysts are vital for large-scale alkaline water electrolysis. Here, we report a grafted superstructure, MOF@POM, formed by self-assembling a metal-organic framework (MOF) with polyoxometalate (POM). In situ electrochemical transformation converts MOF into active metal (oxy)hydroxides to produce a catalyst with a low overpotential of 178 millivolts at 10 milliamperes per square centimeter in alkaline electrolyte. An anion exchange membrane water electrolyzer incorporating this catalyst achieves 3 amperes per square centimeter at 1.78 volts at 80°C and stable operation at 2 amperes per square centimeter for 5140 hours at room temperature. In situ electrochemical spectroscopy and theoretical studies reveal that the synergistic interactions between metal atoms create a fast electron-transfer channel from catalytic iron and cobalt sites, nickel, and tungsten in the polyoxometalate to the electrode, stabilizing the metal sites and preventing dissolution.

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Sintering, high-temperature stability, and thermal conductivity of (Zr, Nb, Hf, Ta)(C, N) high-entropy carbonitrides

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Ceramics International 2025年

作者： Bai, Yang Liang, Yuxin Bi, Juan Cui, Baoning Lu, Zhaopeng Wang, Huangxuan You, Xixi Li, Bangsheng School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Harbin150001 China

High-entropy carbonitrides (HECNs), a new class of high-performance ceramics, hold great potential for high-temperature structural materials and thermal protection systems due to their excellent thermal stability and properties. For its better application, it is important to optimize the sintering temperature of HECNs and deeply investigate its thermal conductivity behavior. This study systematically investigates the thermodynamic stability, formation ability, and thermal properties of (ZrHfNbTa)CxN1-x through first-principles calculations and experimental validation. Thermodynamic calculations reveal that nitrogen incorporation reduces the sintering temperature required to achieve a stable high-entropy solid solution. Experimental validation by spark plasma sintering (SPS) shows that the sintering temperature can be reduced from 1950 °C to 1700 °C. Ab initio molecular dynamics (AIMD) simulations demonstrate that HECNs retain structural integrity at 1773 K. Thermal conductivity tests show an increase with temperature, but a decrease with higher nitrogen content, which is mainly caused by the increased scattering of phonons resulting from lattice distortions. The Debye-Callaway model fitting further elucidates the underlying thermal conductivity mechanisms. In summary, nitrogen incorporation enhances the thermodynamic stability and reduces thermal conductivity of HECN ceramics, providing valuable theoretical and experimental support for their application in high-temperature structural materials and thermal protection systems. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Carbon nitride

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High-photoresponse mixed-dimensional CuOx/WSe2 p-type phototransistor with van der Waals interface

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Applied Physics Reviews 2025年第2期12卷

作者： Jiang, Wengui Wu, Yonghuang Ye, Huanyu Zhou, Liang Xin, Zeqin Liu, Kai Sun, Yinghui Wang, Rongming Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science The State Key Laboratory for Advanced Metals and Materials School of Mathematics and Physics University of Science and Technology Beijing Beijing100083 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China

Mixed-dimensional heterostructures, which utilize the complementary advantages of diverse materials, hold great promise for high-performance photodetectors. However, p-type photodetection is constrained by the scarcity of suitable photosensitive materials and challenges in interface engineering, particularly over-coupling at the hetero-interface, which significantly impacts detection performance. In this work, we present a p-type CuOx/WSe2 phototransistor that achieves both high responsivity and broad bandwidth. Using CuOx nanoparticles with abundant copper vacancies for broadband light absorption and two-dimensional WSe2 as a high-mobility channel, this device demonstrates an exceptional responsivity of up to 1.8 × 105 A/W across wavelengths from 365 to 810 nm. The high performance originates from hole injection from defect-rich CuOx into WSe2, combined with electron trapping in vacancy states. The weak van der Waals interaction at the interface effectively decouples the optical absorption (in CuOx) from charge transport (in WSe2), enabling high gain without sacrificing response speed. © 2025 Author(s).

关键词： Van der Waals forces

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High-Performance Ultraviolet Photodetectors Based on Controlled Grown ZnO Nanorods and Bu-PPP Heterojunction 10

High-Performance Ultraviolet Photodetectors Based on Control...

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10th Symposium on Novel Optoelectronic Detection technology and Applications

作者： Cheng, Wentao Guo, Xiaopeng Tang, Libin Xiang, Jinzhong Ji, Rongbin Wang, Ning Lai, Sin Ki Lau, Shu Ping School of Materials and Energy Yunnan University Kunming650500 China Kunming Institute of Physics Kunming650223 China Yunnan Key Laboratory of Advanced Photoelectronic Materials & Devices Kunming650223 China Xi'an Jingjie Electronic Technology CO. Ltd. Xi'an710075 China School of Optics and Photonics Beijing Institute of Technology Beijing100081 China National Engineering Laboratory for Fiber Optic Sensing Technology Wuhan University of Technology Wuhan430070 China Key Laboratory of Fiber Optic Sensing Technology and Information Processing Ministry of Education Wuhan University of Technology Wuhan430070 China Department of Applied Physics Hong Kong Polytechnic University Hong Kong

ISBN: (数字)9781510688155

ISBN: (纸本)9781510688148

Currently, the development of UV photodetectors has been hindered by the scarcity of p-type wide band gap materials. Here, a nanostructured ultraviolet photodetector based on the organic/inorganic heterojunction, consisting of the p-type Bu-PPP polymer and n-type ZnO nanorods, is proposed and demonstrated to have high performance. In the heterostructure, both Bu-PPP polymer and ZnO nanorods acted as the light absorber due to their suitable bandgap in the UV region, and the large contact area of the heterojunction facilitated charge transfer. Its current density-voltage behavior was investigated when exposed under different UV light (365 nm) intensities and in the dark. The responsivity of the devices was measured to be as high as 23 A W-1 at -1 V bias under UV irradiation. The heterostructure shows huge potential for development of high-performance optoelectronic and optical devices. © 2025 SPIE.

关键词： Nanorods

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Hot Deformation Behavior and Microstructure Evolution of Electrolytic Copper

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Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal materials and Engineering 2025年第4期54卷 920-929页

作者： Zhang, Han Sang, Chen Zhang, Yan Xu, Yangtao Qiao, Jisen Xia, Tiandong School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China Jinchuan Group Copper Co. Ltd Jinchang737100 China

The hot deformation behavior of electrolytic copper was investigated using a Gleeble-3500 thermal simulation testing machine at temperatures ranging from 500 °C to 800 °C and strain rates ranging from 0.01 s-1 to 10 s-1, under 70% deformation conditions. The true stress-true strain curves were analyzed and a constitutive equation was established at a strain of 0.5. Based on the dynamic material model proposed by Prasad, processing maps were developed under different strain conditions. Microstructure of compressed sample was observed by electron backscatter diffraction. The results reveal that the electrolytic copper demonstrates high sensitivity to deformation temperature and strain rate during high-temperature plastic deformation. The flow stress decreases gradually with raising the temperature and reducing the strain rate. According to the established processing map, the optimal processing conditions are determined as follows: deformation temperatures of 600–650 °C and strain rates of 5–10 s-1. Discontinuous dynamic recrystallization of electrolytic copper occurs during high-temperature plastic deformation, and the grains are significantly refined at low temperature and high strain rate conditions. Copyright © 2025, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved.

关键词： Constitutive equations

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Platinum clusters stabilized by zincosilicate zeolite for efficient propane dehydrogenation

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Chinese Journal of Catalysis 2025年第4期71卷 208-219页

作者： Hao Liu Ying Zhang Liyang Liu Tianxiang Chen Xingcong Zhang Peng Hu Chao Xiong Jie Zhou Hao Zhang Lihui Dong Tsz Woon Benedict Lo Bing Nan Xiaohui He Hongbing Ji Key Laboratory of Bioinorganicand Synthetic Chemistry of Ministry of Education Fine Chemical Industry Research InstituteSchool of ChemistryIGCMESun Yat-sen UniversityGuangzhou 510275GuangdongChina Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004GuangxiChina Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteShanghai 200120China State Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic UniversityHunghomHong KongChina State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology Institute of Green Petroleum Processing and Light Hydrocarbon ConversionCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014ZhejiangChina Guangdong Technology Research Center for Synthesis and Separation of Thermosensitive Chemicals Guangzhou 510006GuangdongChina

Dispersing metals from nanoparticles to clusters is often achieved using ligand protection methods,which exhibit unique properties such as suppressing structure-sensitive side ***,this method is limited by the use of different metal precursor salts corresponding to different *** alternative approach,the ion exchange(IE)method,can overcome this limitation to some ***,there is still an urgent need to address the stabilization of metals(especially precious metals)by using IE ***,we reported a Pt cluster catalyst prepared mainly by anchoring Pt atoms via O located near the framework Zn in zincosilicate zeolites and riveted by zeolite surface rings after reduction(reduced Pt/Zn-3-IE).The catalyst can achieve an initial propane conversion of 26%in a pure propane atmosphere at 550℃and shows little deactivation even after 7.5 d of ***,the alteration of catalyst by the introduction of framework Zn was also highlighted and interpreted.

关键词： Zincosilicate zeolite Acid-site identification Rivet effect Pt clusters Propane dehydrogenation

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Mechanical properties regulation in TiNi/Zr-based metallic glass composites through elasto-static load-induced stress-activated martensitic transformation

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Journal of Alloys and Compounds 2025年 1027卷

作者： Gong, Pan Zhang, Jiaqi Ding, Huaping Li, Maojun Jin, Junsong Zhang, Mao Wang, Xinyun State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle Hunan University Changsha410082 China Songshan Lake Materials Laboratory Dongguan523808 China Research Institute of Huazhong University of Science and Technology in Shenzhen Shenzhen518057 China

This investigation introduced an elasto-static loading (ESL) strategy that leveraged the rejuvenation effect of the metallic glass matrix and the transformation toughening of the crystalline phase, thereby enhancing the strength and ductility of Zr-based metallic glass composites reinforced with TiNi particles synthesized through spark plasma sintering. Composites samples with varying volume fractions of TiNi particles underwent 12 hours of static compression loading at 90 % of their yield strength, and a systematic investigation was conducted to study the microstructural and mechanical property alterations induced by ESL. The findings revealed that ESL not only imparted a rejuvenation effect on the metallic glass matrix but also triggered martensitic phase transformation strengthening in the TiNi particles. This effectively enhanced the room-temperature compressive ductility of the composites with 20 vol% and 30 vol% TiNi, with the increase exceeding 50 %, while also improving their strength. Nonetheless, an increase in the volume fraction of TiNi particles resulted in higher internal porosity and a rising number of weakly bonded interfaces within the composites, which diminished the ductility enhancement effects of ESL. With the application of elastic stress, the augmentation of free volume within the metallic glass matrix facilitated the nucleation of shear bands. Moreover, the crystalline second phase, strengthened by phase transformation, not only bolstered the strength of composite but also exerted a stronger resistance to shear bands propagation, consequently enhancing ductility. © 2025 Elsevier B.V.

关键词： Microhardness

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