检索结果-南通市图书馆

Approaching high oxygen evolution reaction performance by synergetic dual-ion leaching

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第9期17卷 7975-7983页

作者： Hancheng Ma Yao Ding Jianqi Li Wei Peng Liqiang Mai School of materials Science and engineering Wuhan University of TechnologyWuhan 430070China State key laboratory of Advanced Technology for materials Synthesis and processing Wuhan University of TechnologyWuhan 430070China

Self-reconstruction of catalysts during oxygen evolution reaction(OER)is crucial for the development of energy conversion ***,the relationship between the specific atomic structure of pre-catalysts and their electrocatalytic behavior after reconstruction via dual-ion leaching has not been extensively *** this work,we design a highly effective non-noble metal OER catalyst with heterointerface through continuous self-reconstruction of Co_(2)(OH)_(3)Cl@NiMoO_(4)as pre-catalyst by a straightforward dual-ion(***_(4)^(2-)and Cl^(-))***-situ Raman and in-situ Fourier transform infrared(FT-IR)spectroscopy have precisely identified the progressive phase transformation of the pre-catalyst during self-reconstruction,which results in a stable heterojunction of CoOOH and NiOOH(CoOOH@NiOOH).Further calculations based on density functional theory(DFT)of CoOOH@NiOOH evident that more electrons will be aggregated in the Fermi level of ***,Gibbs free energy(ΔG)for different OER steps of CoOOH@NiOOH exhibit lower energy costs of all intermediates,implying the well catalytic ***,the catalyst derived from dual-ion leaching displays outstanding OER performance,characterized by an overpotential of 275 mV at a current density of 10 mA·cm^(-2)and exceptional stability over 12 h *** work successfully paves a way of finding high-performance OER catalysts based on non-noble metal through dual-ion leaching during self-reconstruction.

关键词： dual-ion leaching oxygen evolution reaction chemical reconstruction NiMoO_(4) Co_(2)(OH)_(3)Cl

Effect of Fluoride on the Ion-association of Calcium Phosphate and Crystallization of Hydroxyapatite

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(materials Science) 2024年第4期39卷 831-838页

作者：宋昊月 CAI Meng 袁萍邹朝勇 School of materials Science and engineering Wuhan University of TechnologyWuhan 430070China State key laboratory of Advanced Technology for materials Synthesis and processing Wuhan University of TechnologyWuhan 430070China

Using a titration setup to accurately control the reaction conditions and in situ monitor the reaction,we showed that fluoride exhibited negligible effects on the ion association process of calcium and phosphate and the formation of ACP nanospheres in a buffer solution with constant ionic ***,the stability of ACP increased with increasing fluoride concentration,which was ascribed to the inhibitory effect of fluoride on the aggregation of ACP nanospheres and the nucleation of nanocrystals on the surface of ACP ***,fluoride could inhibit the lateral growth of HAP nanosheets and promote the formation of rod-like *** results further improve our understanding of the crystallization pathway of HAP crystals and the regulatory effects of fluoride.

关键词： crystallization amorphous calcium phosphate hydroxyapatite fluoride

Microstructure Regulation and Combustion Performance Optimization of PVDF/Al Composite Powder by Non-covalent Functionalized Graphenes

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(materials Science) 2024年第4期39卷 904-911页

作者：易卓然 DENG Haoyuan QIN Mei 孙一 LUO Guoqiang State key laboratory of Advanced Technology for materials Synthesis and processing Wuhan University of TechnologyWuhan 430070China

Graphene prepared by non-covalent modification of sulfonated poly(ether-ether-ketone)(SPG)was combined with polyvinylidene fluoride(PVDF)/Al to improve the PVDF/Al thermal conductivity while reducing the effect of the thermal resistance at the graphene-polymer *** regulation rule of SPG with different contents on the energy release of fluorine-containing system was *** the content of SPG is 4%,the peak pressure and rise rate of SPG/PVDF/Al composite powder during ignition reach the maximum of 4845.28 kPa and 8683.58 kPa/*** the content of SPG is 5%,the PVDF/Al composite powder is completely coated by SPG,and the calorific value of the material reachs the maximum of 29.094 kJ/*** the design and micro-control of the composite powder,the calorific value of the material can be effectively improved,but the improvement of the mass release rate still depends on the graphene content and surface modification state.

关键词： energetic materials PVDF/Al composites graphene modification energy release combustion

Bio-inspired barnacle cement coating of biodegradable magnesium alloy for cerebrovascular application

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第10期43卷 5164-5185页

作者： Hang Li Fei Wang Xiao-Jing Sun Liu-Jie Qi Jing-An Li Mujahid Iqbal Shao-Kang Guan School of Material Science and engineering Zhengzhou University Henan key laboratory of Advanced Magnesium Alloy&key laboratory of materials processing and Mold (Ministry of Education) Zhengzhou University Department of Physics University of Agriculture Faisalabad

Ischemic stroke is increasing worldwide, and stent intervention has gradually become one of the effective treatments. Owing to its good mechanical properties and biocompatibility, biodegradable Mg-Zn-Y-Nd alloy(ZE21B) has good application prospects in vascular ***, too fast degradation and delayed endothelialization are the bottleneck problem to limit its further application. In this study, the bio-inspired coating barnacle cement cp19k is constructed on ZE21B surface through electrostatic spraying to improve the corrosion resistance and pro-endothelialization ability. The coating was evaluated through electrochemistry, static immersion corrosion,in vitro blood experiments and cell experiments. Cp19k effectively improved the corrosion resistance of the substrate ZE21B, reduced the degradation rate, improved endothelial cell proliferation and migration capabilities,inhibited smooth muscle cells proliferation and regulated contractile phenotype, inhibited macrophage adhesion,regulated macrophage M2 phenotype, and reduced the expression of inflammatory factor of TNF-a and inhibited fibroplasia in vivo. Our data indicated that the barnacle cement cp19k coating had potential application on the surface modification of Mg alloy cerebrovascular stent.

关键词： Barnacle cement cp19k Biodegradable magnesium alloy Cerebrovascular stent M2 phenotype Pro-endothelialization

Top priority current path between SiC particles during ultra-high temperature flash sintering: Presence of PyC “bridges”

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2024年第2期13卷 255-262页

作者： Le Lu Tianlong Liu Zhaofeng Chen Fei Wang Mengmeng Yang Qiong Wu Lixia Yang Huanyong Li International laboratory for Insulation and Energy Efficiency materials College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 211106China State key laboratory of Solidification processing School of Materials and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Flash sintering(FS)is a novel technique for rapidly densifying silicon carbide(SiC)*** work achieved a rapid sintering of SiC ceramics by the utilization of ultra-high temperature flash sintering within 60 *** carbon(PyC)“bridges”were constructed between SiC particles through the carbonisation of phenolic resin,providing a large number of current *** incubation time of the flash sintering process was significantly reduced,and the sintering difference between the centre and the edge regions of the ceramics was minimized,with an average particle size of the centre region and edge region being 12.31 and 9.02μm,*** results showed that the porosity of the SiC ceramics after the flash sintering was reduced to 14.79% with PyC“bridges”introduced,and the Vickers hardness reached 19.62 ***“bridges”gradually evolved from amorphous eddy current carbon to oriented graphite carbon,indicating that the ultra-high temperature environment in which the sample was located during the flash sintering was successfully ***-high temperature flash sintering of SiC is expected to be applied to the local repair of matrix damage in SiC ceramic matrix composites.

关键词： silicon carbide(SiC) flash sintering(FS) pyrolytic carbon(PyC)"bridges" current path instantaneous

Regulation of pseudographitic carbon domain to boost sodium energy storage

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第6期17卷 5188-5196页

作者： Zhidong Hou Mingwei Jiang Da Lei Xiang Zhang Yuyang Gao Jian-Gan Wang State key laboratory of Solidification processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Lab of Graphene(NPU)Xi’an 710072China

Hard carbon anode has shown extraordinary potentials for sodium-ion batteries(SIBs)owing to the cost-effectiveness and advantaged ***,the widespread application of hard carbon is still hindered by the insufficient sodium storage capacity and depressed rate property,which are mainly induced by the undesirable pseudographitic ***,we develop a molten-salt-mediated strategy to regulate the pseudographitic structure of hard carbon with suitable interlayer spacing and enlarged pseudographitic domain,which is conducive to the intercalation capacity and diffusion kinetics of sodium ***,the optimized hard carbon anode delivers a high reversible capacity of 320 mAh·g^(−1),along with superior rate property(138 mAh·g−1 at 2 A·g^(−1))and stable cyclability over 1800 ***,the in situ Raman spectroscopic study and full-cell assembly further investigate the sodium storage mechanism and practical implement of obtained hard *** work pioneers a low-cost and effective route to regulate the pseudographitic structure of hard carbon materials for advanced SIBs.

关键词： pseudographitic structure molten salt hard carbon anode sodium-ion batteries

Mussel-inspired Methacrylic Gelatin-dopamine/Ag Nanoparticles/Graphene Oxide Hydrogels with Improved Adhesive and Antibacterial Properties for Applications as Wound Dressings

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(materials Science) 2024年第2期39卷 512-521页

作者：宿正楠 HU Yanru MENG Lihui OUYANG Zhiyuan LI Wenchao ZHU Fang XIE Bin 吴庆知 State key laboratory of Advanced Technology for materials Synthesis and processing Biomedical Material and Engineering Center of Hubei ProvinceWuhan University of TechnologyWuhan 430070China

A novel strategy was developed to prepare the methacrylic gelatin-dopamine(GelMA-DA)/Ag nanoparticles(NPs)/graphene oxide(GO) composite hydrogels with good biocompatibility,mechanical properties,and antibacterial ***-inspired DA was utilized to modify the GelMA molecules,which imparts good adhesive performance to the ***,interfacial enhancer,not only improves mechanical properties of the hydrogels,but also provides anchor sites for loading Ag NPs through numerous oxygencontaining functional groups on the *** experimental results show that the GelMA/Ag NPs/GO hydrogels have good biocompatibility,and exhibit a swelling rate of 202±16%,the lap shear strength of 147±17 kPa,and compressive modulus of 136±53 kPa,in the case of the Ag NPs/GO content of 2 mg/*** activity of the hydrogels against both gram-negative and gram-positive bacteria is dependent on the Ag NPs/GO content derived from the release of Ag^(+).Furthermore,the GelMA/Ag NPs/GO hydrogels possess good adhesive ability,which is resistant to highly twisted state when stuck on the surface of *** results demonstrate promising potential of the GelMA-DA/Ag NPs/GO hydrogels as wound dressings for biomedical applications in clinical and emergent treatment.

关键词： GelMA dopamine,graphene oxide adhesion antibacterial ability

Chloride ion battery:A new emerged electrochemical system for next-generation energy storage

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第1期88卷 154-168,I0004页

作者： Shulin Chen Lu Wu Yu Liu Peng Zhou Qinyou An Liqiang Mai State key laboratory of Advanced Technology for materials Synthesis and processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070HubeiChina State key laboratory of Refractories and Metallurgy Institute of Advanced Materials and NanotechnologyWuhan University of Science and TechnologyWuhan 430081HubeiChina

In the scope of developing new electrochemical concepts to build batteries with high energy density,chloride ion batteries(CIBs)have emerged as a candidate for the next generation of novel electrochemical energy storage technologies,which show the potential in matching or even surpassing the current lithium metal batteries in terms of energy density,dendrite-free safety,and elimination of the dependence on the strained lithium and cobalt ***,the development of CIBs is still at the initial stage with unsatisfactory performance and several challenges have hindered them from reaching *** this review,we examine the current advances of CIBs by considering the electrode material design to the electrolyte,thus outlining the new opportunities of aqueous CIBs especially combined with desalination,chloride redox battery,*** respect to the developing road of lithium ion and fluoride ion batteries,the possibility of using solid-state chloride ion conductors to replace liquid electrolytes is tentatively *** beyond,perspectives and clear suggestions are concluded by highlighting the major obstacles and by prescribing specific research topics to inspire more efforts for CIBs in large-scale energy storage applications.

关键词： Chloride ion battery Anion shuttling Conversion reaction Chloride redox

Effective approaches for enhancing the stability of ruthenium-based electrocatalysts towards acidic oxygen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第10期35卷 126-138页

作者： Qiyan Wu Ruixin Zhou Zhangyi Yao Tanyuan Wang Qing Li State key laboratory of materials processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China

Water splitting with proton exchange membrane water electrolyzers(PEMWE)is regarded as a promising pathway for sustainable hydrogen ***,oxygen evolution reaction(OER)is considered as the dominant factor during the whole process due to the sluggish *** the catalysts,Rubased catalysts draw special attention because of their excellent activity and relatively low ***,the limited stability impedes their further commercialization and tremendous efforts have been devoted to overcome this *** review firstly introduces the basic mechanisms of *** the evaluation protocols and techniques to investigate the stability of Ru-based catalysts are summarized.A detailed elucidation of the possible degradation mechanisms is also critically ***,effective strategies to design durable Ru-based catalysts for acidic OER are *** as heteroatom doping,phase and facet engineering,heterostructure building and support ***,promises,perspectives and challenges in developing highly durable Ru-based catalysts for acidic OER are outlined.

关键词： Acidic oxygen evolution Ru-based catalysts Stability Degradation mechanisms Optimization strategies