检索结果-内蒙古大学图书馆

Magnetic field-enhanced photoelectrochemical water splitting of Co_(3)O_(4)/TiO_(2)for efficient oxygen evolution

Science China Materials 2024年第10期67卷 3168-3175页

作者： Ze-En Zhou Yi Lu Yi-Xuan Liu Shang Cao Ge Tian Zhi-Yi Hu Ling Shen Si-Ming Wu Jie Ying Wei Geng Xiao-Yu Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing&Shenzhen Research Institute&Laoshan Laboratory Wuhan University of TechnologyWuhan 430070China National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu LaboratoryFoshan 528200China Nanostructure Research Centre(NRC) Wuhan University of TechnologyWuhan 430070China School of Chemical Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

Effective separation of photogenerated carriers plays a vital role in governing the efficiency of photo-electrocatalytic ***,the advancement in enhancing the intrinsic carrier separation efficiency of semiconductors has shown limited ***,we reported the use of a magnetic field to improve the photoelectrochemical water splitting of a magnetic Co_(3)O_(4)/TiO_(2)photoanode by boosting the photogenerated carrier separation *** the presence of the magnetic field,oxygen evolution reaction occurs with a high photocurrent density of 0.86 mA cm^(−2)at 1.23 V versus VRHE,and an applied bias photon-to-current efficiency of 0.342%at 0.61 ***,the photoanode maintains its oxygen evolution reaction for more than 400 h with photocurrent decays by ca.10%.Observations made in this effort show that the enhancement of photo-electrocatalytic efficiency by a magnetic field is a consequence of the effect of the Lorentz force generated by the magnetic field on photogenerated carriers and ions near the Co_(3)O_(4)/TiO_(2)photoanode,which improves the carrier separation efficiency and the bubble release *** results suggest that manipulating photoelectrode carriers by using a magnetic field is a promising strategy to design high-performance photoelectrochemical for water splitting.

关键词： photoelectrochemical water splitting Co_(3)O_(4)/TiO_(2) carrier separation efficiency stability

来源：评论

学校读者我要写书评

暂无评论

高效多孔碳基催化剂的研究进展及其在锌空气电池中应用

引用

Science China Materials 2023年第9期66卷 3381-3400页

作者：蔡世昌安宇冯亚刚段磊张寒露张猛吴佳宾唐浩林 School of Materials Science and Engineering Henan University of TechnologyZhengzhou 450001China Department of Chemistry Tsinghua UniversityBeijing 100084China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong LaboratoryXianhu Hydrogen ValleyFoshan 528200China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

近年来,能源短缺问题日益突出,传统化石燃料使用过程中排放的二氧化碳大大加剧了全球变暖.锌空气电池作为一种新型能源,由于其低成本、高比能量密度、高安全性和环境友好等优点而受到广泛关注.然而,锌空气电池的发展速度缓慢,一个主要... 详细信息

近年来,能源短缺问题日益突出,传统化石燃料使用过程中排放的二氧化碳大大加剧了全球变暖.锌空气电池作为一种新型能源,由于其低成本、高比能量密度、高安全性和环境友好等优点而受到广泛关注.然而,锌空气电池的发展速度缓慢,一个主要原因是阴极空气催化剂的催化效率低和稳定性差.本文总结了用于空气阴极的多孔碳基催化剂的最新研究进展.在对锌空气电池进行简要介绍后,从孔结构和杂原子掺杂两方面介绍了碳载体的结构和组成.根据孔径大小:微孔、介孔和大孔,详细介绍了锌空气电池中多孔碳的设计和制备.此外,还根据氮、氟、硫、磷和硼等杂原子类别,分别讨论了杂原子掺杂的合成策略以及相应电池性能.最后,本文对锌空气电池未来发展过程中的挑战和机遇进行了展望.

关键词：锌空气电池碳载体能源短缺问题碳基催化剂化石燃料杂原子掺杂多孔碳新型能源

来源：评论

学校读者我要写书评

暂无评论

Pressure-controlled synergy between dehydrogenation and densification in TiH2 sintering

引用

Journal of the European Ceramic Society 2025年第14期45卷

作者： Hu, Tianxiao Lin, Mengting Zou, Ji Wang, Weimin Ji, Wei Fu, Zhengyi Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Titanium hydride (TiH2) ceramics have become key high-performance hydrogen storage materials. However, the sintering of TiH2 faces significant challenges due to the low temperature of dehydrogenation reaction (300–800 °C). In this study, high-pressure spark plasma sintering (HPSPS) technique was employed to successfully realize low-temperature high-density preparation by suppressing dehydrogenation and regulating densification kinetics under a high pressure (200 MPa). Under the optimized conditions (750 °C, 200 MPa, and 10 min), a fully dense single face-centered cubic (FCC) δ-Ti(H) phase bulk material was fabricated. The initial dehydrogenation temperature of samples fabricated by high-pressure spark plasma sintering (HPSPS) was higher than the dehydrogenation temperature of powder. Mechanistic analyses showed that high pressure inhibited hydrogen escape by compressing pores while promoting particle plastic flow and interfacial bonding. Increasing holding time from 5 to 10 min enhanced diffusion-dominated densification but exacerbated dehydrogenation-induced porosity under low-pressure conditions. The study shows that high pressure compaction can alleviate the contradiction between traditional high temperature densification and low temperature decomposition of TiH2, and offers a new strategy for the efficient densification of materials for low temperature decomposition. © 2025 Elsevier Ltd

关键词： Densification

来源：评论

学校读者我要写书评

暂无评论

Textured silicon nitride ceramics with enhanced properties fabricated by high pressure sintering

引用

Ceramics International 2025年

作者： Tao, Haoyu Qin, Xiaowei Sui, Jiahua Zou, Ji Wang, Weimin Ji, Wei Fu, Zhengyi Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Silicon nitride (Si3N4) ceramics with a textured morphology were prepared via high-pressure sintering in this study. The mechanical and thermal properties of the prepared materials in different orientations were investigated. Compared with the Si3N4 ceramics prepared at 1700 °C under low pressure of 50 MPa, the specimens prepared under high pressure of 200 MPa showed an obvious textured microstructure and a high fracture toughness (8.2 ± 0.5 MPa m1/2). Especially, the thermal conductivity was determined to be 105 W m−1 K−1 along the texture direction and 64 W m−1 K−1 in the vertical direction, respectively. The as-prepared Si3N4 with a morphological texture was anisotropic in hardness and toughness. High temperature and high pressure played a crucial role in the formation of Si3N4 ceramic texture and the enhancement of comprehensive properties. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Fracture toughness

来源：评论

学校读者我要写书评

暂无评论

Carboxymethyl chitosan-alginate enhances bone repair effects of magnesium phosphate bone cement by activating the FAK-Wnt pathway

引用

Bioactive Materials 2023年第2期20卷 598-609页

作者： Ling Yu Tian Gao Wei Li Jian Yang Yinchu Liu Yanan Zhao Ping He Xuefeng Li Weichun Guo Zhengfu Fan Honglian Dai Department of Orthopedic Surgery I(Spine Surgery) Renmin Hospital of Wuhan UniversityWuhan430060China Department of Bone and Soft Tissue Tumor Key Laboratory of Carcinogenesis and Translational ResearchMinistry of EducationPeking University Cancer Hospital&InstituteBeijing100000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Research Center of Hubei ProvinceWuhan University of TechnologyWuhan430070China Department of Orthopedic Surgery Renmin Hospital of ShayangJingmen448200China

There is a continuing need for artificial bone substitutes for bone repair and reconstruction,Magnesium phosphate bone cement(MPC)has exceptional degradable properties and exhibits promising ***,its mechanical strength needs improved and its low osteo-inductive potential limits its therapeutic application in bone *** functionally modified MPC by using a polymeric carboxymethyl chitosan-sodium alginate(CMCS/SA)gel *** had the advantages of:improved compressive strength,ease of handling,and an optimized interface for bioactive bone *** new composites with 2%CMCS/SA showed the most favorable physicochemical properties,including mechanical strength,wash-out resistance,setting time,injectable time and heat ***,the composite promoted the attachment and proliferation of osteoblast *** was also found to induce osteogenic differentiation in vitro,as verified by expression of osteogenic *** terms of molecular mechanisms,data showed that new bone cement activated the Wnt pathway through inhibition of the phosphorylation ofβ-catenin,which is dependent on focal adhesion *** micro-computed tomography and histological analysis,we found that the MPC-CMCS/SA scaffolds,compared with MPC alone,showed increased bone regeneration in a rat calvarial defect ***,our study suggested that the novel composite had potential to help repair critical bone defects in clinical practice.

关键词： Critical bone defect Magnesium phosphate cement Carboxymethyl chitosan Sodium alginate Osteogenic differentiation

来源：评论

学校读者我要写书评

暂无评论

Surface pseudocapacitance of mesoporous Mo_(3)N_(2) nanowire anode toward reversible high-rate sodium-ion storage

引用

Journal of Energy Chemistry 2021年第4期30卷 295-303页

作者： Yalong Jiang Jun Dong Shuangshuang Tan Qiulong Wei Fangyu Xiong Wei Yang Yuanhao Shen Qingxun Zhang Zi'ang Liu Qinyou An Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Department of Materials Science and Engineering Fujian Key Laboratory of Materials GenomeCollege of MaterialsXiamen UniversityXiamen 361005FujianChina Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200GuangdongChina

Sodium-ion storage devices are highly desirable for large-scale energy storage applications owing to the wide availability of sodium resources and low *** metal nitrides(TMNs)are promising anode materials for sodium-ion storage,while their detailed reaction mechanism remains ***,we synthesize the mesoporous Mo3N2 nanowires(Meso-Mo_(3)N_(2)-NWs).The sodium-ion storage mechanism of Mo3N2 is systematically investigated through in-situ XRD,ex-situ experimental characterizations and detailed kinetics ***,the Mo_(3)N_(2) undergoes a surface pseudocapacitive redox charge storage *** from the rapid surface redox reaction,the Meso-Mo_(3)N_(2)-NWs anode delivers high specific capacity(282 m Ah g^(-1) at 0.1 A g^(-1)),excellent rate capability(87 m Ah g^(-1) at 16 A g^(-1))and long cycling stability(a capacity retention of 78.6%after 800 cycles at 1 A g^(-1)).The present work highlights that the surface pseudocapacitive sodium-ion storage mechanism enables to overcome the sluggish sodium-ion diffusion process,which opens a new direction to design and synthesize high-rate sodiumion storage materials.

关键词： Surface pseudocapacitance Sodium-ion storage Nitrogen vacancy Molybdenum nitride High-rate

来源：评论

学校读者我要写书评

暂无评论

High-Performance Ag_(2)Se/Methyl Cellulose Thermoelectric Composites for Flexible Power Generators

引用

Energy Material Advances 2024年第1期5卷 275-282页

作者： Zuo Xiao Qiufeng Meng Yong Du Ping Wei Jie Qin Jingyu Chen Zhongchang Wang Per Eklund School of Materials Science and Engineering Shanghai Institute of Technology100 Haiquan RoadShanghai 201418China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China The Center of Functional Materials for Working Fluids of Oil and Gas Field School of New Energy and MaterialsSouthwest Petroleum UniversityChengdu 610500China Sichuan Engineering Technology Research Center of Basalt Fiber Composites Development and Application State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengdu 610500SichuanChina International Iberian Nanotechnology Laboratory Av.Mestre Jose Veiga s/n4715-330 BragaPortugal Thin Film Physics Division Department of PhysicsChemistry and Biology(IFM)Linköping UniversitySE-58183 LinköpingSweden

Flexible thermoelectric generators(FTEGs)offer a promising solution for powering wearable electronics,while their practical applications are mainly obstructed by the moderate properties of flexible thermoelectric(TE)***,flexible Ag_(2)Se nanowire(NW)/methyl cellulose(MC)composite films were developed via facile screen-printing technology combined with cold pressing and annealing treatment,and a highest power factor of 1,641.58μW m^(-1)K^(-2)at 360 K was *** reasons for the high TE performance of the Ag_(2)Se NW/MC composite films were because,after the annealing treatment,the Ag_(2)Se NWs were sintered to form conductive network structures,the crystallinity of Ag_(2)Se was markedly enhanced,and the content of insulating phase MC in the composite film was *** Ag_(2)Se NW/MC composite film held appreciable flexibility,as its room-temperature power factor(1,312.08μW m^(-1)K^(-2))can retain~93%after bending for 1,000 cycles at a radius of 4 ***,the assembled FTEG consisting of 4 strips can generate a maximal power density of 3.51 W m^(-2)at a temperature difference of 14.1 *** results open an effective and large-scale strategy for fabricating high-performance flexible TE materials and energy-harvesting devices.

关键词： annealing treatment cold pressing Ag Se nanowires methyl cellulose flexible thermoelectric generators ftegs offer thermoelectric composites flexible thermoelectric generators power factor

来源：评论

学校读者我要写书评

暂无评论

A new strategy to access Co/N co-doped carbon nanotubes as oxygen reduction reaction catalysts

引用

Chinese Chemical Letters 2021年第1期32卷 535-538页

作者： Bingshuai Liu Huang Zhou Huihui Jin Jiawei Zhu Zhe Wang Chenxi Hu Lvhan Liang Shichun Mu Daping He State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center of RF-Microwave Technology and Application Wuhan University of TechnologyWuhan 430070China

Carbon nanotubes(CNTs),as one-dimensional nanomaterials,show great potential in energy conversion and storage due to their efficient electrical conductivity and mass ***,the security risks,time-consuming and high cost of the preparation process hinder its further ***,we develop that a negative pressure rather than a following gas environment can promote the generation of cobalt and nitrogen co-doped CNTs(Co/N-CNTs) by using cobalt zeolitic imidazolate framework(ZIF-67) as a precursor,in which the negative pressure plays a key role in adjusting the size of cobalt nanoparticles and stimulating the rearragement of carbon atoms for forming ***,the obtained Co/N-CNTs,with high content of pyridinic nitrogen and abundant graphitized structure,exhibit superior catalytic activity for oxygen reduction reaction(ORR) with half-wave potential(E_(1/2)) of 0.85 V and durability in terms of the minimum current loss(2%) after the 30,000 s *** development provides a new pathway for large-scale and cost-effective preparation of metal-doped CNTs for various applications.

关键词： Negative pressure Cobalt zeolitic imidazolate framework Cobalt and nitrogen co-doped Carbon nanotubes Oxygen reduction reaction

来源：评论

学校读者我要写书评

暂无评论

Defect Engineering on Carbon‑Based Catalysts for Electrocatalytic CO2 Reduction

引用

Nano-Micro Letters 2021年第1期13卷 56-78页

作者： Dongping Xue Huicong Xia Wenfu Yan Jianan Zhang Shichun Mu College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry and College of ChemistryJilin University2699 Qianjin StreetChangchun 130012People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China

Electrocatalytic carbon dioxide(CO2)reduction(ECR)has become one of the main methods to close the broken carbon cycle and temporarily store renewable energy,but there are still some problems such as poor stability,low activity,and *** the most promising strategy to improve ECR activity is to develop electrocatalysts with low cost,high activity,and long-term ***,defective carbon-based nanomaterials have attracted extensive attention due to the unbalanced electron distribution and electronic structural distortion caused by the defects on the carbon ***,the present review mainly summarizes the latest research progress of the construction of the diverse types of defects(intrinsic carbon defects,heteroatom doping defects,metal atomic sites,and edges detects)for carbon materials in ECR,and unveil the structure-activity relationship and its catalytic *** current challenges and opportunities faced by high-performance carbon materials in ECR are discussed,as well as possible future *** can be believed that this review can provide some inspiration for the future of development of high-performance ECR catalysts.

关键词： Electrocatalytic CO2 reduction Carbon-based nanomaterials Intrinsic defects Heteroatom doping defects Metal atomic sites

来源：评论

学校读者我要写书评

暂无评论

Perfluorosulfonic acid proton exchange membrane with double proton site side chain for high-performance fuel cells at low humidity

引用

Journal of Materials Science & technology 2023年第35期166卷 155-163页

作者： Hongyun Tan Shengqiu Zhao S.Eltahir Ali Shuhong Zheng Abdullah K.Alanazi Rui Wang Haining Zhang Hala M.Abo-Dief Ben Bin Xu Hassan Algadi Handong Li Priyanka Wasnik Zhanhu Guo Haolin Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Science and Technology University College-RanyahTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China Integrated Composites Laboratory(ICL) Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Department of Electrical Engineering Faculty of EngineeringNajran UniversityNajran11001Saudi Arabia

Structural optimization of ionomers is an effective strategy for achieving high-performance proton ex-change membranes(PEMs)under low relative humidity(RH)*** this study,sulfonimide group and trifluoromethanesulfonate acid(TFSA)ionic liquids were introduced to the perfluorosulfonic acid(PFSA)side chain,resulting in polymer membranes with varying chain lengths(i.e.,PFC_(2)-TF-SI,PFC_(4)-TF-SI,and PFC_(5)-TF-SI).This dual proton-conducting structure extended the length of the hydrophilic side chain and enhanced the hydrophobic-hydrophilic phase separation,aiding in the formation of proton transport ***,the proton conductivity of PFC_(5)-TF-SI and PFC_(2)-TF-SI membranes reached 7.1 and 10.6 mS/cm at 30%RH and 80℃,respectively,which were approximately 29.1%and 92.7%higher than that of the pristine PFC_(5)-SA membrane(5.5 mS/cm).Furthermore,the maximum power density of the PFC_(5)-TF-SI and PFC_(2)-TF-SI membranes from the built single fuel cell achieved 649 and 763 mW/cm^(2) at 30%RH and 80℃,respectively,which were higher than that of the pristine PFC_(5)-SA membrane(567 mW/cm^(2))by about 14.5%and 34.6%,***,this study provides a strategy for PEM design under low RH conditions.

关键词： Proton exchange membrane Structural design Dual proton conduction Hydrophilic channel Proton conductivity Fuel cells

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：