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Interfacial engineering of holey platinum nanotubes for formic acid electrooxidation boosted water splitting

Journal of Energy Chemistry 2023年第2期77卷 209-216,I0006页

作者： Zi-Xin Ge Yu Ding Tian-Jiao Wang Feng Shi Pu-Jun Jin Pei Chen Bin He Shi-Bin Yin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education)Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710062ShaanxiChina College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118GuangdongChina MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004GuangxiChina

Both structure and interface engineering are highly effective strategies for enhancing the catalytic activity and selectivity of precious metal *** this work,we develop a facile pyrolysis strategy to synthesize the high-quality holey platinum nanotubes(Pt-H-NTs)using nanorods-like Pt^(Ⅱ)-phenanthroline(PT)coordination compound as self-template and self-reduction ***,an up-bottom strategy is used to further synthesize polyallylamine(PA)modified Pt-H-NTs(Pt-HNTs@PA).PA modification sharply promotes the catalytic activity of Pt-H-NTs for the formic acid electrooxidation reaction(FAEOR)by the direct reaction ***,PA modification also elevates the catalytic activity of Pt-H-NTs for the hydrogen evolution reaction(HER)by the proton enrichment at electrolyte/electrode *** from the high catalytic activity of Pt-H-NTs@PA for both FAEOR and HER,a two-electrode FAEOR boosted water electrolysis system is fabricated by using Pt-H-NTs@PA as bifunctio nal *** FAEOR boosted water electrolysis system only requires the operational voltage of 0.47 V to achieve the high-purity hydrogen production,showing an energy-saving hydrogen production strategy compared to traditional water electrolysis system.

关键词： Holey platinum nanotubes Chemical functionalization Formic acid oxidation reaction Hydrogen evolution reaction Water splitting

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Multi-interface Modification Induced Crack Deflection Behavior and Enhanced Fracture Resistance in Thermal Barrier Coatings

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Journal of Alloys and Compounds 2025年

作者： Qicheng Li Xiufang Cui Yongzhi Jing Wei Xu Yi Wang Zhuo Chen Zhijia Zhang Yongchao Fang Tong Shang Guo Jin Institute of Surface/Interface Science and Technology Key Laboratory of Superlight Material and Surface Technology of Ministry of Education College of Material Science and Chemical Engineering Harbin Engineering University Harbin 150001 China Northwest Institute for Nonferrous Metal Research Xi an 710016 China The Military Industry Program Evaluation Center of Costind of SASTIND Beijing 100048 China No.703 Research Institute China State Shipbuilding Co. Ltd. Harbin 150078 China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material Beijing Beijing Institute of Aeronautical Materials Beijing 100095 China

Conventional thermal barrier coatings (TBCs) composed of yttria-stabilized zirconia (YSZ) ceramic top layers and MCrAlY (M = Ni, Co, or their combination) alloy bond coats are prone to brittle fracture and interfacial delamination under extreme thermo-mechanical-chemical coupled *** study develops a composite-toughened thermal barrier coating (TBC) system integrating three innovations: laser-modified SiC whisker-reinforced YSZ-W L ceramic layers, a novel NiCoCrFeAl 0.8 Si 0.1 (NbMoTaW) 0.1 high-entropy alloy bond coat, and hoop-patterned laser-textured interfaces. Compared to conventional TBC1 (NiCoCrAlY/YSZ), the optimized TBC3 demonstrates 64.3% higher interfacial strength, survives 150 thermal shock cycles at 1100°C (20% spallation area), and shows 61.43% lower erosion mass loss post-thermal cycling. The YSZ-WL layer reduces cyclic molten salt corrosion mass loss by 22.58% versus *** advancements highlight the synergistic effects of whisker toughening (crack deflection/bridging), high-entropy alloy bond coats (suppressed TGO growth), and hoop-textured interfaces (guided crack propagation), establishing a groundbreaking strategy for extreme-environment TBC applications.

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The dielectric behavior and efficient microwave absorption of doped nanoscale LaMnO_(3)at elevated temperature

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Nano Research 2022年第8期15卷 7731-7741页

作者： Zhigang Mu Guoke Wei Hang Zhang Lu Gao Yue Zhao Shaolong Tang Guangbin Ji College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering AVIC Manufacturing Technology InstituteBeijing 100024China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093China

LaMnO_(3)perovskite has great potential in microwave absorption at high temperature due to its complex doping effect and super *** current research mainly focuses on the doping ratio regulation,while the mechanism of doping effect at high temperature is still lack of sufficient *** this work,La1−xSrxMn1−yFeyO_(3)(LaMnO_(3),La_(0.7)Sr_(0.3)MnO_(3),and La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3))nanostructures with different doping sites were successfully prepared by the solid phase reaction ***,the high temperature dielectric test samples were obtained by mixing with cordierite(2MgO·2Al_(2)O_(3)·5SiO_(2)(MAS)).The results showed that the temperature dependence of Mn ion spin state had a significant impact on the high temperature dielectric behavior of La_(1−x)Sr_(x)Mn_(1−y)FeyO_(3).Particularly,when the thickness is only 1.9 mm,La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3)/MAS can achieve the widest bandwidth of 4.2 GHz covered the entire X-band(8.2–12.4 GHz)and a minimum reflection loss(RL)value of−17.99 dB at 500℃.In order to improve the operating temperature of La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3)/MAS,a cellular array structure was designed by using computer simulation technology(CST)software to introduce magnetic *** the outer length of the hexagon is 1 mm and the coating thickness is 1.9 mm,the widest bandwidth covers the X-band and the minimum RL value is−15.35 dB at 800℃.Therefore,La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3)has a great prospect as an efficient high temperature microwave absorber.

关键词： microwave absorption doping perovskite high temperature dielectric behavior

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Phase-matching of high harmonic generation in twisted solids

arXiv

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arXiv 2025年

作者： Ma, Chenjun Huang, Chen You, Yilong Liu, Huazhan Ding, Zhitong Ding, Mingchao Zhang, Jin Li, Guixin Sun, Zhipei Wu, Shiwei Ma, Chaojie Wang, Enge Hong, Hao Liu, Kaihui State Key Lab for Mesoscopic Physics Frontiers Science Centre for Nano-optoelectronics School of Physics Peking University Beijing China Institute of Physics Chinese Academy of Sciences Beijing China National Center for Nanoscience and Technology Chinese Academy of Sciences Beijing China Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen China QTF Centre of Excellence Department of Electronics and Nanoengineering Aalto University Espoo Finland State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai China International Centre for Quantum Materials Collaborative Innovation Centre of Quantum Matter Peking University Beijing China Tsientang Institute for Advanced Study Zhejiang China Interdisciplinary Institute of Light-Element Quantum Materials Research Centre for Light-Element Advanced Materials Peking University Beijing China

High harmonic generation (HHG) in solids could enable attosecond and ultraviolet light sources with high compactness, great controllability and rich functions. However, the HHG process is accompanied by a quite large wavevector mismatch that is uncompensated by any traditional phase-matching method, directly limiting its energy conversion efficiency. Here, we propose an effective strategy for phase-matching of HHG with arbitrary harmonic orders in solids. Two flakes of solids with an interlayer twist induce a nonlinear optical phase that depends on the crystal symmetry, twist angle and harmonic order, which can be accurately designed to compensate for the phase mismatch in HHG. Guided by the twist-phase-matching theory, we achieved a record-high conversion efficiency of ~1.5×10−5 for the fifth HHG in twisted hexagonal boron nitride crystals with a total thickness of only 1 µm. Our work establishes a foundation for developing ultrashort-wavelength and ultrafast-pulse laser sources in compact solid-state tabletop systems for fundamental and applied sciences. Copyright © 2025, The Authors. All rights reserved.

关键词： Nonlinear optics

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Anion-Regulated Weakly Solvating Electrolytes for High-Voltage Lithium Metal Batteries

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Energy & Environmental Materials 2023年第6期6卷 259-265页

作者： Zhipeng Jiang Jisheng Mo Chen Li Haiwen Li Qingan Zhang Ziqi Zeng Jia Xie Yongtao Li School of Materials Science and Engineering&Low-Carbon New Materials Research Center Anhui University of TechnologyMaanshan 243002China Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education Anhui University of TechnologyMaanshan 243002China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China Hefei General Machinery Research Institute Hefei 230031China

Development of advanced high-voltage electrolytes is key to achieving high-energy-density lithium metal batteries(LMBs).Weakly solvating electrolytes(WSE)can produce unique anion-driven interphasial chemistry via altering the solvating power of the solvent,but it is difficult to dissolve the majority of Li salts and fail to cycle at a cut-off voltage above 4.5 ***,we present a new-type WSE that is regulated by the anion rather than the solvent,and the first realize stable cycling of dimethoxyethane(DME)at 4.6 V without the use of the“solvent-in-salt”*** relationships between the degree of dissociation of salts,the solvation structure of electrolytes,and the electrochemical performance of LMBs were systematically *** found that LiBF_(4),which has the lowest degree of dissociation,can construct an anion-rich inner solvation shell,resulting in anion-derived anode/cathode *** to such unusual solvation structure and interphasial chemistry,the Li-LiCoO_(2)full cell with LiBF_(4)-based WSE could deliver excellent rate performance(115 mAh g^(-1)at 10 C)and outstanding cycling stability even under practical conditions,including high loading(10.7 mg cm^(-2)),thin Li(50μm),and limited electrolyte(1.2μL mg^(-1)).

关键词： high-voltage LiCoO_(2) lithium metal batteries solvation structure weakly solvating electrolyte

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Fabrication and electrical characteristics of flash-sintered SiO_(2)-doped ZnO-Bi_(2)O_(3)-MnO_(2) varistors

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Journal of advanced Ceramics 2020年第6期9卷 683-692页

作者： Pai PENG Yujun DENG Jingpeng NIU Liyi SHI Yunzhu MEI Sanming DU Juan LIU Dong XU Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials(Anhui University of Technology) Ministry of EducationMa'anshan 243002China Key Laboratory of Etallurgical Emission Reduction&Resources Recycling(Anhui University of Technology) Ministry of EducationMa'anshan 243002China Research Center of Nano Science and Technology Shanghai UniversityShanghai 200444China National United Engineering Laboratory for Advanced Bearing Tribology Henan University of Science and TechnologyLuoyang 471023China

The dense ZnO-Bi_(2)O_(3)-MnO_(2)(ZBMS)varistors for x=0,1,2,3 wt% were fabricated by flash sintering method under the low temperature of 850℃ within 2 *** sample temperature was estimated by a black body radiation model in the flash sintering *** crystalline phase assemblage,density,microstructure,and electrical characteristics of the flash-sintered ZBMS varistors with different SiO_(2)-doped content were *** to the XRD analysis,many secondary phases were detected due to the SiO_(2) ***,the average grain size decrease with increasing SiO_(2)-doped *** improved nonlinear characteristics were obtained in SiO_(2)-doped samples,which can be attributed to the ion migration and oxygen absorption induced by the doped SiO_(2).The flash-sintered ZBMS varistor ceramics for x=2 wt% exhibited excellent comprehensive electrical properties,with the nonlinear coefficient of 24.5,the threshold voltage and leakage current of 385 V·mm^(-1 )and 11.8μA,respectively.

关键词： flash sintering SiO_(2)additive ZBMS varistors electrical properties

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Optical and electrical anisotropy regulation engineering of low-dimensional materials toward polarized detection and imaging applications

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Rare Metals 2024年第7期43卷 2968-2993页

作者： Jian-Bin Zhang Nan Zhou Li-Hui Zhang Cong-Hui Shang Jia-Xuan Li Yi Zhao Guo-Hui Jia Ru-Sen Yang Hua Xu Xiao-Bo Li Shaanxi Joint Key Laboratory of Graphene Shaanxi Key Laboratory of High-Orbits-Electron Materials and Protection Technology for AerospaceShaanxi Joint Key Laboratory of GrapheneSchool of Advanced Materials and NanotechnologyXidian UniversityXi'an710126China Guangzhou Institute of Technology Xidian UniversityGuangzhou 710068China Xi'an Thermal Power Research Institute Co. LtdXi'an 710054China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an Xi'an 710119China

Polarized-sensitive image sensors are a kind of photodetector with great development potential due to their enhanced ability to detect and identify the target objects from the aspect of spatial,spectral and polarized ***,low-dimensional anisotropic materials with inherent anisotropic properties,ultrathin thickness,tunable bandgap and feasible integration with complementary metal oxide semiconductor(CMOS)fabrication processes have attracted great interest for their facilitation of polarized photodetector devices *** the polarized detection performance of low-dimensional materials to satisfy realistic needs stimulates the exploration of modulation of anisotropic *** this review,we comprehensively introduce the latest research progress in modulating the optical and optoelectronic anisotropy characteristics of low-dimensional *** strategy of anisotropy regulation through crystal structure engineering and coupling system is discussed ***,the latest progress in image recognition applications using anisotropic low-dimensional materials is reviewed in ***,we summarize the challenge and propose future opportunities in the practical application of polarized-sensitive imaging photodetectors based on low-dimensional anisotropic materials.

关键词： Anisotropy Polarized detection Image recognition Low-dimensional materials

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Alloying engineering for thermoelectric performance enhancement in p-type skutterudites with synergistic carrier concentration optimization and thermal conductivity reduction

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Journal of advanced Ceramics 2023年第3期12卷 539-552页

作者： Zhiyuan Liu Yonggui Wang Ting Yang Zuju Ma Huiyan Zhang Hailing Li Ailin Xia Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of EducationAnhui University of TechnologyMaanshan 243002China School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243002China School of Environmental and Materials Engineering Yantai UniversityYantai 264005China

The enhancements in thermoelectric(TE)performances of p-type skutterudites are usually limited due to the relatively low Seebeck coefficients owing to the higher carrier concentration and more impurity phases induced by inherent structural instability of a Fe-based *** shown in this study,alloying engineering of Ni doping at Fe sites in a p-type CeFe_(3.8)Co_(0.2)Sb_(12)skutterudite can not only reduce the impurity phases with high thermal conductivity but also regulate the carrier concentration,and thus significantly increase the Seebeck *** thermal conductivity was largely suppressed due to the enhanced point defect phonon scattering and decreased hole *** a result,a TE figure of merit ZT of the CeFe_(3.5)Ni_(0.3)Co_(0.2)Sb_(12)sample reached 0.8,which is approximately 50%higher than that of a Ni-free *** Ni doping can maintain a high ZT at a high temperature by controlling the reduction in a band ***,a high average ZT close to 0.8 at 650–800 K for CeFe_(3.5)Ni_(0.3)Co_(0.2)Sb_(12)was obtained,which was comparable to or even higher than those of the reported Ce-filled Fe-based skutterudites due to the synergistic optimization of electrical and thermal *** study provides a strategy to synergistically optimize electrical–thermal performances of the p-type skutterudites by alloying engineering.

关键词： p-type skutterudite materials Ni doping synergistic optimization thermoelectric(TE)properties

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Effects of Magnetization on Thermoelectric Transport Properties of CoSb_(3)Material

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Journal of Wuhan University of technology(Materials Science) 2021年第3期36卷 353-357页

作者： ZHU Jianglong TONG Xin NIU Shuo LIU Zhiyuan XU Dong Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of EducationAnhui University of TechnologyMaanshan 243002China School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243002China

The effects of magnetization on the phase composition,microstructure and thermoelectric transport properties of CoSb_(3)were studied *** magnetic properties of CoSb_(3)material were also measured at room temperature in order to confirm its magnetic *** results of XRD and FESEM analysis indicated that the phase composition and microstructure of the CoSb_(3)were not affected by *** results of thermoelectric transport measurement showed that the electrical and thermal transport properties of materials were also not affected by *** results were mainly attributed to the diamagnetism of the CoSb_(3)material,which were consistent with the results of the magnetic properties *** study is expected to provide a special research perspective for studying the effects of the external conditions on the structure and properties of thermoelectric materials.

关键词： CoSb_(3)materials magnetization thermoelectric properties thermoelectric materials

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Improved perovskite solar cell efficiency by tuning the colloidal size and free ion concentration in precursor solution using formic acid additive

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Journal of Energy Chemistry 2020年第2期29卷 43-51页

作者： Lina Meng Qingbo Wei Zhou Yang Dong Yang Jiangshan Feng Xiaodong Ren Yucheng Liu Shengzhong(Frank)Liu 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 710119ShaanxiChina Key Laboratory of Chemical Reaction Engineering of Shaanxi Province College of Chemistry and Chemical EngineeringYan'an UniversityYan'an 716000ShaanxiChina iChEM Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Improving the quality of the perovskite active layer is crucial to obtaining high performance perovskite solar cells(PSCs). In this work, by introducing formic acid into the formamidinium lead iodide(FAPbI3)precursor solution, we managed to achieve reduced colloidal size in the solution, leading to more uniform deposition of FAPbI3 film with lower trap state density and higher carrier mobility. The solar cells based on the FAPbI3 absorber layer modified with formic acid show significantly better photovoltaic performance than that on the reference FAPbI3 film without formic acid. The device performance shows a close correlation with the colloidal size. Within the range studied from 6.7 to 1.0 nm, the smaller the colloidal size is, the higher the solar cell efficiency. More specifically, the cell efficiency is improved from17.82% for the control cell without formic acid to 19.81% when 0.764 M formic acid was used. Formic acid has also been added into a CH3NH3PbI3(MAPbI3) precursor solution, which exhibits a similar effect on the resulting MAPb I3 films and solar cells, with efficiency improved from 16.07% to 17.00%.

关键词： Perovskite solar cell Crystallization Formic acid Additive

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