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Durable Acidic Oxygen Evolution Via Self-Construction of Iridium Oxide/Iridium-Tantalum Oxide Bi-Layer Nanostructure with Dynamic Replenishment of Active Sites

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Nano-Micro Letters 2025年第7期17卷 278-292页

作者： Qi Guo Rui Li Yanan Zhang Qiqin Zhang Yi He Zhibin Li Weihong Liu Xiongjun Liu Zhaoping Lu Institute of Clean Energy Yangtze River Delta Research InstituteNorthwestern Polytechnical University Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology Beijing School of Materials Science and Engineering Harbin Institute of Technology Shenzhen

Proton exchange membrane （PEM） water electrolysis presents considerable advantages in green hydrogen ***,oxygen evolution reaction （OER） catalysts in PEM water electrolysis currently encounter several pressing challenges,including high noble metal loading,low mass activity,and inadequate durability,which impede their practical application and *** we report a self-constructed layered catalyst for acidic OER by directly using an Ir–Ta-based metallic glass as the matrix,featuring a nanoporous IrO2surface formed in situ on the amorphous Ir TaOxnanostructure during *** distinctive architecture significantly enhances the accessibility and utilization of Ir,achieving a high mass activity of 1.06 A mgIr-1at a 300 mV overpotential,13.6 and 31.2 times greater than commercial Ir/C and IrO2,*** catalyst also exhibits superb stability under industrial-relevant current densities in acid,indicating its potential for practical *** analyses reveal that the coordinated nature of the surface-active Ir species is effectively modulated through electronic interaction between Ir and Ta,preventing them from rapidly evolving into high valence states and suppressing the lattice oxygen ***,the underlying IrTaOxdynamically replenishes the depletion of surface-active sites through inward crystallization and selective dissolution,thereby ensuring the catalyst’s long-term durability.

关键词： Electronic interaction Nanoporous Proton exchange membrane (PEM) water electrolysis Replenishment Self-construction

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Toward multicomponent mesoporous single-crystalline metal oxides

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National science Review 2024年第5期11卷 92-93页

作者： Minkyeong Ban Jinwoo Lee Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)

Mesoporous metal oxide materials have attracted significant interest due to their porous frameworks and large surface areas, finding applications in sensors, catalysis and energy storage [1]. The performance of these ... 详细信息

关键词： single metal crystalline mesoporous multicomponent oxides toward

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Using coal fly ash-based geopolymer to immobilize Cd from lead fuming furnace slag

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Rare Metals 2023年第3期42卷 1056-1060页

作者： Bin Guo Bo Liu Shen-Gen Zhang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China

Lead fuming furnace slag(LFFS)is a by-product of lead metal production,which is a toxic solid waste according to toxicity characteristic leaching procedure(TCLP)*** was investigated the feasibility of preparation of geopolymer using coal fly ash(CFA)and LFFS and the immobilization efficiency of Cd in *** synthesized geopolymer samples were examined by compressive strength,Fourier transform transmission infrared spectroscopy(FTIR)spectra,X-ray diffraction(XRD)and backscattered electron(BSE)*** is a certain mass ratio(2:3)of the LFFS to the CFA at which the compressive strength of the geopolymeric matrix is the *** test shows that Cd in LFFS can be effectively immobilized in the geopolymer *** is not only a potential technological solution for reusing LFFS but also an effective immobilization method for LFFS treatment and disposal.

关键词： Immobilization Cd Geopolymer Lead fuming furnace slag

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Inhibition of the intergranular brittleness of HR3C heat-resistant steel by strain-aging induced nano-M23C6 dispersion precipitation

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材料科学技术（英文版） 2025年第10期213卷 288-299页

作者： Xuehan Wang Lining Xu Lang Jiao Wenyao Li Jinna Mei Yanfen Zhao Lijie Qiao Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083PR China Suzhou Nuclear Power Research Institute Suzhou 215004PR China

M23C6 chromium-rich carbides are common grain-boundary precipitations in Cr-containing *** presence of grain-boundary carbides often leads to intergranular brittleness and decreases mechanical *** study proposes a deformation and aging technique to obtain a high-volume-fraction dispersion distribution of the hard nano-M23C6 phase by changing the nucleation sites from grain boundaries to deformation coherent twin boundaries produced during cold *** M23C6 precipitation-strengthened austenitic stainless steel has a strength of up to 1.4 GPa but maintains favor-able plasticity(＞11％).This study provides a novel approach for the control of intergranular brittleness in metallic materials.

关键词： HR3C steel M23C6 chromium-rich carbides Cold deformation Intergranular brittleness Deformation coherent twin boundary

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Process-Scalable and Loew-Power Amplifiers: Progress and prospects in dynamic amplifier research

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IEEE Solid-State Circuits Magazine 2024年第3期16卷 55-66页

作者： Oh, Sein Je, Minkyu Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of

Amplifiers are critical components in many applications. They simply perform signal amplification, but real-world implementation must consider several challenges, such as finite BW, signal distortion, noise, stability, and so on. Solutions to these problems typically involve circuit techniques that lead to high power consumption. Therefore, numerous studies have been conducted to break the tradeoff between performance and power. Among the most promising candidates is the current-reuse structure [1], [2], [3], [4], [5], [6]. Such amplifiers have continuously improved their power efficiency factor (PEF) performance year by year. However, there are essential limitations to consider. First, the supply voltage significantly decreases as the process node advances. This process scaling not only makes it challenging for amplifiers to achieve high gain but also significantly degrades linearity. Second, conventional amplifiers, meaning continuous-time (CT) amplifiers, operate with a static current. While better PEFs of CT amplifiers improve overall performance envelopes in many CT-domain applications, they exhibit clear limitations in discrete-time (DT)-domain or mixed-signal applications. © 2009-2012 IEEE.

关键词： Continuous time systems

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Interactive effect of thermal aging and proton irradiation on microstructural evolution and hardening ofδ-ferrite in 308L stainless steel weld metal

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Journal of Materials science & technology 2024年第3期170卷 140-155页

作者： Xiaodong Gao Xiaodong Lin Tao Guo Lining Xu Yaolei Han Baolong Jiang Xingyuan Mei Qunjia Peng Lijie Qiao Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Institute of Materials Shanghai UniversityShanghai 200072China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Suzhou Nuclear Power Research Institute Suzhou 215004China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

In the harsh service environment of high temperature and intense neutron irradiation in water-cooled nuclear reactors,the austenitic stainless steel weld overlay cladding on the inner surface of the reactor pressure vessel suffers from thermal aging and irradiation damage simultaneously,which can induce microstructural evolution and hardening of the *** it is quite difficult to achieve this simul-taneous process out of the pile,two kinds of combined experiments,i.e.,post-irradiation thermal aging and post-aging irradiation were performed on 308 L stainless steel weld metals in this *** interactive effect of thermal aging and proton irradiation on microstructural evolution and hardening ofδ-ferrite in 308 L weld metal was investigated by combining atom probe tomography,transmission elec-tron microscopy and nanoindentation *** results revealed that thermal aging could eliminate the dislocation loops induced by irradiation and affect the phase transition process by accelerating spinodal decomposition and G-phase precipitation,thus enhancing hardening of irradiatedδ-*** the effect of irradiation on the microstructure and hardening of thermally agedδ-ferrite,however,intensive collision cascades can intensify G-phase precipitation and dislocation loop formation but decrease spinodal decomposition,leading to a limited effect on hardening of thermally agedδ-***,the interaction of thermal aging and irradiation can promote G-phase ***,the interaction can causeδ-ferrite hardening,which is mainly influenced by spinodal decomposition,followed by G-phase and dislocation loops,where spinodal decomposition and G-phase cause hardening by inducing strain fields.

关键词： Austenitic stainless steel weld metals Thermal aging Proton irradiation Interaction Microstructural evolution Hardening

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Conformal and rapid micro-molding manufacturing of ultraviolet-curable silver paste on curved surfaces using digital light processing

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材料科学技术（英文版） 2025年第10期213卷 153-161页

作者： Mei-Ling Yang Guo-Xiang Zhou Ning Xie Kun-Peng Lin Yan-Zhao Zhang Zhe Zhao Yun-Peng He Yu-Hang Zhang Zhi-Hua Yang De-Chang Jia Yu Zhou Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China Chongqing Research Institute of HIT Chongqing 401135China Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of JinanJinan 250022China Chongqing Research Institute of HIT Chongqing 401135China Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China School of Materials Science and Engineering Harbin Institute of Technology ShenzhenShenzhen 518055China

Electronic 3D printing possesses a remarkable molding ability and convenience in integrated circuits,flex-ible wearables,and individual automobile ***,traditional 3D printing technology still struggles to meet the demands of high precision and high efficiency in the process of fabricating a curved surface circuit,particularly achieving precise silver circuit molding on irregular ***,a high-precision and muti-scaled conformal manufacturing method for silver circuits is presented through the digital light processing(DLP)of ultraviolet-curable silver paste(UV-SP)with adjustable photocuring prop-erties,enabling the successful preparation of micro-scaled conductive structure on the sharply skewed hook *** minimum modeling depth and width of the cured silver paste can be well controlled to 10 and 88 pm,*** with traditional printing technology,the printing efficiency of com-plex patterns has increased by over 70％.The printed silver circuit demonstrates an exceptionally high electrical conductivity,reaching as high as 1.16 × 107 S/***,the UV-SP exhibits significant manufacturing efficiency and superior molding resolution compared to conventional direct ink writing and inkjet printing techniques,thereby contributing to the attainment of high precision and efficiency of conformal and micro-molding manufacturing in sensors,communication antennas,and other electronic devices based on curved substrates.

关键词： Digital light processing Ultraviolet-curable silver paste Conformal manufacturing Silver circuits High precision

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Post-tunable salt gel electrolytes toward flexible supercapacitor switches

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Journal of Energy Chemistry 2025年第1期100卷 114-124页

作者： Hui Wang Shuang Chen Xuming Liu Qin Zhang Xin Liu Polymeric and Soft Materials Laboratory School of Chemistry and Life Science and Advanced Institute of Materials ScienceChangchun University of TechnologyChangchun 130012JilinChina Polymeric and Soft Materials Laboratory School of Chemical Engineering and Advanced Institute of Materials ScienceChangchun University of TechnologyChangchun 130012JilinChina

Convertible hydrogel supercapacitors have emerged as promising energy storage devices in switches,diodes,and ***,inherent weaknesses in ionic conductivity,mechanical properties,and water retention of hydrogel electrolytes seriously hinder their *** by the hardness conversion of sea cucumber skin,a conductivity and mechanics dual-tunable salt gel electrolyte is successfully *** salt gel presents a reversible switching of conductors-insulators and a mechanical regulation between softness and hardness via the dissolution-crystallization transition of sodium acetate trihydrate(SAT).Meanwhile,the salt gels spontaneously grow a layer of“armor”through saturated phase-change salt crystals effectively reducing water evaporation of hydrogel ***,this phase-change soft-rigid conversion strategy will expand the capabilities of gel-based flexible supercapacitors(area capacitance:258.6 mF cm^(-2)),and the capacitance retention rate could still reach 86.9%after 3000 cycles at high ***,the salt gel supercapacitor is potentially used in over-heat alarm *** is anticipated that the strategy of conductivity and mechanics of dual-tunable salt gel would provide a new perspective on the development of energy storage devices,wearable electronics,and flexible robots.

关键词： Supercapacitors Salt gels Reversible phase transition Post-tuning Conductivity switching

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Medium and high-entropy transition mental disilicides with improved infrared emissivity for thermal protection applications

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Journal of Materials science & technology 2023年第5期136卷 149-158页

作者： Juntao Song Yuan Cheng Huimin Xiang Fu-Zhi Dai Shun Dong Guiqing Chen Ping Hu Xinghong Zhang Wenbo Han Yanchun Zhou Science and Technology on Advanced Composite in Special Environments Laboratory Harbin Institute of TechnologyHarbin 150080China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China

Transition metal disilicides are widely used as heating elements and infrared emission ***,the limited intrinsic infrared emissivity and high thermal conductivity are the main limitations to their applications as infrared emission coatings in the thermal protection *** cope with these prob-lems,four medium and high-entropy transition metal disilicides,i.e.,(V_(0.25)Ta_(0.25)Mo_(0.25)W_(0.25))Si_(2)(ME-1),(Nb_(0.25)Ta_(0.25)Mo_(0.25)W_(0.25))Si_(2)(ME-2),(V_(0.2)Nb_(0.2)Ta_(0.2)Mo_(0.2)W_(0.2))Si_(2)(HE-1),and(Cr_(0.2)Nb_(0.2)Ta_(0.2)Mo_(0.2)W_(0.2))Si_(2)(HE-2),were designed and synthesized by spark plasma sintering method using transition metal binary disilicides as *** introduction of multi-elements into transition metal disilicides not only im-proved the infrared emissivity but also reduced the electrical and thermal *** them,(Cr_(0.2)Nb_(0.2)Ta_(0.2)Mo_(0.2)W_(0.2))Si_(2)(HE-2)had the lowest electrical conductivity of 3789 S cm-1,which is over one order of magnitude lower than that of MoSi_(2)(50000 S cm^(-1)),and total infrared emissivity of 0.42 at room temperature,which is nearly double of that of TaSi_(2).Benefiting from low electrical conductivity and phonon scattering due to lattice distortion,the medium and high-entropy transition metal disilicides also demonstrated a significant decline in thermal conductivity compared to their binary *** all samples,HE-2 exhibited the lowest thermal conductivity of 6.4 W m^(−1)K^(−1).The high-entropy tran-sition metal disilicides also present excellent oxidation resistance at high *** improved infrared emissivity,reduced thermal conductivity,excellent oxidation resistance,and lower densities of these medium and high-entropy transition metal disilicides portend that they are promising as infrared emission coating materials for applications in thermal protection systems.

关键词： High-entropy ceramics Transition metal disilicides Electrical conductivity Infrared emissivity Thermal conductivity

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Thermally Drawn Multi‑material Fibers Based on Polymer Nanocomposite for Continuous Temperature Sensing

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advanced Fiber Materials 2023年第5期5卷 1712-1724页

作者： Woo Mi Ryu Yunheum Lee Yeonzu Son Geonho Park Seongjun Park Department of Bio and Brain Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141South Korea Program of Brain and Cognitive Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141South Korea Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141South Korea KAIST Institute for NanoCentury Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141South Korea KAIST Institute for Health Science and Technology Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141South Korea

With increasing personalized healthcare,fiber-based wearable temperature sensors that can be incorporated into textiles have attracted more attention in the field of wearable ***,we present a flexible,well-passivated,polymer–nanocomposite–based fiber temperature sensor fabricated by a thermal drawing process of multiple *** engineered a preform to optimize material processability and sensor performance by considering the rheological and functional properties of the preform *** fiber temperature sensor consisted of a temperature-sensing core made from a conductive polymer composite of thermoplastic polylactic acid,a conductive carbon filler,reduced graphene oxide,and a highly flexible linear low-density polyethylene passivation *** fiber temperature sensor exhibited adequate sensitivity(−0.285%/℃)within a temperature range of 25–45℃with rapid response and recovery times of 11.6 and 14.8 s,*** addition,it demonstrated a consistent and reliable temperature response under repeated mechanical and chemical stresses,which satisfied the requirements for the long-term application of wearable fiber ***,the fiber temperature sensor sewn onto a daily cloth and hand glove exhibited a highly stable performance in response to body temperature changes and temperature detection by *** results indicate the great potential of this sensor for applications in wearable,electronic skin,and other biomedical devices.

关键词： Fiber temperature sensor Wearable device Thermal drawing process Multi-material thermal drawing conductive polymer composite

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